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Yang Y, Shen L, Agathokleous E, Wang S, Jin Y, Bai Y, Yang W, Ren B, Jin J, Zhao X. The interplay of soil physicochemical properties, methanogenic diversity, and abundance governs methane production potential in paddy soil subjected to multi-decadal straw incorporation. ENVIRONMENTAL RESEARCH 2024; 256:119246. [PMID: 38810824 DOI: 10.1016/j.envres.2024.119246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/20/2024] [Accepted: 05/26/2024] [Indexed: 05/31/2024]
Abstract
Straw incorporation holds significant promise for enhancing soil fertility and mitigating air pollution stemming from straw burning. However, this practice concurrently elevates the production and emission of methane (CH4) from paddy ecosystems. Despite its environmental impact, the precise mechanisms behind the heightened CH4 production resulting from long-term straw incorporation remains elusive. In a 32-year field experiment featuring three fertilization treatments (CFS-chemical fertilizer with wheat straw, CF-chemical fertilizer, and CK-unamended), we investigated the impact of abiotic (soil physicochemical properties) and biotic (methanogenic abundance, diversity, and community composition) factors on CH4 production in paddy fields. Results revealed a significantly higher CH4 production potential under CFS treatment compared to CF and CK treatments. The partial least squares path model revealed that soil physicochemical properties (path coefficient = 0.61), methanogenic diversity (path coefficient = -0.43), and methanogenic abundance (path coefficient = 0.29) collectively determined CH4 production potential, explaining 77% of the variance. Enhanced soil organic carbon content and water content, resulting from straw incorporation, emerged as pivotal factors positively correlated with CH4 production potential. Under CFS treatment, lower Shannon index of methanogens, compared to CF and CK treatments, was attributed to increased Methanosarcina. Notably, the Shannon index and relative abundance of Methanosarcina exhibited negative and positive correlations with CH4 production potential, respectively. Methanogenic abundance, bolstered by straw incorporation, significantly amplified overall potential. This comprehensive analysis underscores the joint influence of abiotic and biotic factors in regulating CH4 production potential during multi-decadal straw incorporation.
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Affiliation(s)
- Yuling Yang
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Lidong Shen
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China.
| | - Evgenios Agathokleous
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Shuwei Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Yuhan Jin
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Yanan Bai
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Wangting Yang
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Bingjie Ren
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Jinghao Jin
- Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Xu Zhao
- State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
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Sultan H, Li Y, Ahmed W, Yixue M, Shah A, Faizan M, Ahmad A, Abbas HMM, Nie L, Khan MN. Biochar and nano biochar: Enhancing salt resilience in plants and soil while mitigating greenhouse gas emissions: A comprehensive review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 355:120448. [PMID: 38422850 DOI: 10.1016/j.jenvman.2024.120448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 02/01/2024] [Accepted: 02/20/2024] [Indexed: 03/02/2024]
Abstract
Salinity stress poses a significant challenge to agriculture, impacting soil health, plant growth and contributing to greenhouse gas (GHG) emissions. In response to these intertwined challenges, the use of biochar and its nanoscale counterpart, nano-biochar, has gained increasing attention. This comprehensive review explores the heterogeneous role of biochar and nano-biochar in enhancing salt resilience in plants and soil while concurrently mitigating GHG emissions. The review discusses the effects of these amendments on soil physicochemical properties, improved water and nutrient uptake, reduced oxidative damage, enhanced growth and the alternation of soil microbial communities, enhance soil fertility and resilience. Furthermore, it examines their impact on plant growth, ion homeostasis, osmotic adjustment and plant stress tolerance, promoting plant development under salinity stress conditions. Emphasis is placed on the potential of biochar and nano-biochar to influence soil microbial activities, leading to altered emissions of GHG emissions, particularly nitrous oxide(N2O) and methane(CH4), contributing to climate change mitigation. The comprehensive synthesis of current research findings in this review provides insights into the multifunctional applications of biochar and nano-biochar, highlighting their potential to address salinity stress in agriculture and their role in sustainable soil and environmental management. Moreover, it identifies areas for further investigation, aiming to enhance our understanding of the intricate interplay between biochar, nano-biochar, soil, plants, and greenhouse gas emissions.
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Affiliation(s)
- Haider Sultan
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China.
| | - Yusheng Li
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Waqas Ahmed
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, 570228, China
| | - Mu Yixue
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Asad Shah
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Mohammad Faizan
- Botany Section, School of Sciences, Maulana Azad National Urdu University, Hyderabad, 500032, India
| | - Aqeel Ahmad
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, 2751, Australia
| | - Hafiz Muhammad Mazhar Abbas
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China
| | - Lixiao Nie
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China.
| | - Mohammad Nauman Khan
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya, 572025, China.
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Luo M, Liu Y, Li J, Gao T, Wu S, Wu L, Lai X, Xu H, Hu H, Ma Y. Effects of Straw Returning and New Fertilizer Substitution on Rice Growth, Yield, and Soil Properties in the Chaohu Lake Region of China. PLANTS (BASEL, SWITZERLAND) 2024; 13:444. [PMID: 38337978 PMCID: PMC10857592 DOI: 10.3390/plants13030444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 01/27/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024]
Abstract
Recently, replacing chemical fertilizers with straw returning and new fertilizers has received considerable attention in the agricultural sector, as it is believed to increase rice yield and improve soil properties. However, less is known about rice growth and soil properties in paddy fields with the addition of different fertilizers. Thus, in this paper, we investigated the effects of different fertilizer treatments, including no fertilization (CK), optimized fertilization based on the medium yield recommended fertilizer amount (OF), 4.50 Mg ha-1 straw returning with chemical fertilizers (SF), 0.59 Mg ha-1 slow-release fertilizer with chemical fertilizers (SRF), and 0.60 Mg ha-1 water-soluble fertilizer with chemical fertilizers (WSF), on rice growth, yield, and soil properties through a field experiment. The results show that compared with the OF treatment, the new SF, SRF, and WSF treatments increased plant height, main root length, tiller number, leaf area index, chlorophyll content, and aboveground dry weight. The SF, SRF, and WSF treatments improved rice grain yield by 30.65-32.51% and 0.24-1.66% compared to the CK and OF treatments, respectively. The SRF treatment increased nitrogen (N) and phosphorus (P) uptake by 18.78% and 28.68%, the harvest indexes of N and P by 1.75% and 0.59%, and the partial productivity of N and P by 2.64% and 2.63%, respectively, compared with the OF treatment. However, fertilization did not significantly affect the average yield, harvest indexes of N and P, and partial productivity of N and P. The contents of TN, AN, SOM, TP, AP, and AK across all the treatments decreased significantly with increasing soil depth, while soil pH increased with soil depth. The SF treatment could more effectively increase soil pH and NH4+-N content compared to the SRF and WSF treatments, while the SRF treatment could greatly enhance other soil nutrients and enzyme activities compared to the SF and WSF treatments. A correlation analysis showed that rice yield was significantly positively associated with tiller number, leaf area index, chlorophyll, soil NO3--N, NH4+-N, SOM, TP, AK, and soil enzyme activity. The experimental results indicate that SRF was the best fertilization method to improve rice growth and yield and enhance soil properties, followed by the SF, WSF, and OF treatments. Hence, the results provide useful information for better fertilization management in the Chaohu Lake region of China.
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Affiliation(s)
- Mei Luo
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Ying Liu
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Jing Li
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Tingfeng Gao
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Sheng Wu
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Lei Wu
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Xijun Lai
- Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Hongjun Xu
- Station of Agricultural Environment Protection, Chaohu 238006, China
| | - Hongxiang Hu
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
| | - Youhua Ma
- College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; (M.L.)
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Mu G, Xu L, Zhang J. Study of the utilization of main crop straw resources in Southern China and its potential as a replacement for chemical fertilizers. FRONTIERS IN PLANT SCIENCE 2024; 14:1172689. [PMID: 38250439 PMCID: PMC10796737 DOI: 10.3389/fpls.2023.1172689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 10/26/2023] [Indexed: 01/23/2024]
Abstract
Although straw returning to the field (SRTTF) is conducive to promoting sustainable agricultural production and protecting the environment, straw resources are still wasted due to the lack of suitable straw-returning technology in southern China. Based on the statistical yearbook and a large number of studies, different methods were used to calculate the total straw resources and SRTTF potential, and differences in these methods were compared. The results indicate that the total amount of straw resources in southern China in 2021 was 3.35×108 t. The nutrient content of K2O in the straw accounted for the highest proportion of total nutrient resources (63.66%), followed by N (26.88%) and P2O5 (9.46%). In theory, total SRTTF could replace almost all K2O and part of N and P2O5, indicating that the nutrient substitution potential of SRTTF was high. It is suggested that the SRTTF method be adopted in the middle and lower reaches of the Yangtze River, which mainly uses direct returning (DR) supplemented by indirect returning (IDR). In southeast China, straw returning is carried out by the combination of IDR and IR. In southwest China, straw returning is mainly carried out by IR and supplemented by MDR. This study will provide theoretical support for the government to formulate straw-returning policy.
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Affiliation(s)
- Guiting Mu
- Guizhou Institute of Biology, Guizhou Academy of Sciences, Guiyang, China
| | - Lifu Xu
- Guizhou Provincial Forest Resources and Environment Research Center, Guizhou University, Guiyang, China
| | - Jiachun Zhang
- Guizhou Botanical Garden, Guizhou Academy of Sciences, Guiyang, China
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Shrestha RK, Jacinthe PA, Lal R, Lorenz K, Singh MP, Demyan SM, Ren W, Lindsey LE. Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions. JOURNAL OF ENVIRONMENTAL QUALITY 2023; 52:769-798. [PMID: 36905388 DOI: 10.1002/jeq2.20475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 02/28/2023] [Indexed: 05/06/2023]
Abstract
Biochar is one of the few nature-based technologies with potential to help achieve net-zero emissions agriculture. Such an outcome would involve the mitigation of greenhouse gas (GHG) emission from agroecosystems and optimization of soil organic carbon sequestration. Interest in biochar application is heightened by its several co-benefits. Several reviews summarized past investigations on biochar, but these reviews mostly included laboratory, greenhouse, and mesocosm experiments. A synthesis of field studies is lacking, especially from a climate change mitigation standpoint. Our objectives are to (1) synthesize advances in field-based studies that have examined the GHG mitigation capacity of soil application of biochar and (2) identify limitations of the technology and research priorities. Field studies, published before 2022, were reviewed. Biochar has variable effects on GHG emissions, ranging from decrease, increase, to no change. Across studies, biochar reduced emissions of nitrous oxide (N2 O) by 18% and methane (CH4 ) by 3% but increased carbon dioxide (CO2 ) by 1.9%. When biochar was combined with N-fertilizer, it reduced CO2 , CH4 , and N2 O emissions in 61%, 64%, and 84% of the observations, and biochar plus other amendments reduced emissions in 78%, 92%, and 85% of the observations, respectively. Biochar has shown potential to reduce GHG emissions from soils, but long-term studies are needed to address discrepancies in emissions and identify best practices (rate, depth, and frequency) of biochar application to agricultural soils.
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Affiliation(s)
- Raj K Shrestha
- Horticulture and Crop Science, The Ohio State University, Columbus, Ohio, USA
| | - Pierre-Andre Jacinthe
- Department of Earth Sciences, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, USA
| | - Rattan Lal
- CFAES Rattan Lal Center for Carbon Management and Sequestration, The Ohio State University, Columbus, Ohio, USA
| | - Klaus Lorenz
- CFAES Rattan Lal Center for Carbon Management and Sequestration, The Ohio State University, Columbus, Ohio, USA
| | - Maninder P Singh
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan, USA
| | - Scott M Demyan
- School of Environment and Natural Resources, The Ohio State University, Columbus, Ohio, USA
| | - Wei Ren
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Laura E Lindsey
- Horticulture and Crop Science, The Ohio State University, Columbus, Ohio, USA
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6
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Zhang Y, Du H, Chen Y, Wei H, Dai Q, Liu J, Li Z. Influence of biochar-based urea substituting urea on rice yield, bacterial community and nitrogen cycling in paddy fields. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:2794-2805. [PMID: 36369962 DOI: 10.1002/jsfa.12333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 11/09/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND There is an increasing understanding of the importance of biochar-based fertilizers in agroecosystems. However, no research has evaluated the effects of partial substitution of urea with biochar-based urea on rice yields and soil microbial communities. We therefore investigated the rice yields, bacterial communities, and gene abundance involved in nitrogen in silty clay and sandy loam soil paddy fields treated with urea (U), total substitution of urea with biochar-based urea (BSU), partial substitution of urea with biochar-based urea in basal and tillering fertilizers (BSU1), and partial substitution of urea with biochar-based urea in panicle fertilizers (BSU2). RESULTS Compared with U, applying biochar-based urea increased rice yields, with BSU2 having the most notable effect. Principal coordinate analysis revealed that bacterial communities treated with BSU2 in both soils were significantly different from those treated with U and BSU, most probably due to the decrease in pH caused by the decrease in the concentration of ammonium. The relative abundance of Subdivision3_genera_incertae_sedis, Azotobacter, Geobacter, Buchnera, and Terrimonas in silty clay soils and Saccharibacteria_genera_incertae_sedis and Geobacter in sandy loam soils significantly increased when treated with BSU2 and was positively correlated with rice yields, indicating that the improvements in rice yield were associated with changes in bacterial communities. Based upon amoA/narG related to nitrate accumulation and norB/nosZ related to nitrous oxide emissions, BSU2 enabled a lower risk of nitrate leaching and nitrous oxide emissions in both soils, in comparison with the U and BSU treatments. CONCLUSION The BSU2 treatment had a stronger yield-increasing effect than biochar-based urea alone and lowered the risk of nitrogen pollution, which is beneficial to the sustainable development of paddy fields. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Yang Zhang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, China
| | - Haimeng Du
- Jiangsu Key Laboratory of Crop Genetic and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, China
| | - Yinglong Chen
- Jiangsu Key Laboratory of Crop Genetic and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, China
| | - Huanhe Wei
- Jiangsu Key Laboratory of Crop Genetic and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, China
| | - Qigen Dai
- Jiangsu Key Laboratory of Crop Genetic and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Jiumei Liu
- Technology Development Research Institute of Testing and Certification, Jiangxi General Institute of Testing and Certification, Nanchang, China
| | - Zhijiang Li
- Jiangxi Xinbang Biochemical Co., Ltd., Jiujiang, China
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You X, Wang S, Du L, Wu H, Wei Y. Effects of organic fertilization on functional microbial communities associated with greenhouse gas emissions in paddy soils. ENVIRONMENTAL RESEARCH 2022; 213:113706. [PMID: 35714686 DOI: 10.1016/j.envres.2022.113706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Soil microbial communities play a key role in the biochemical processes and nutrient cycles of the soil ecosystem and their byproducts, including greenhouse gases (GHGs). Organic fertilization influences bacterial soil biodiversity and is an essential emission source of GHGs in paddy soil ecosystems. However, the impact of organic fertilization on the functional microorganisms associated with the GHGs methane and nitrous oxide remains unknown. We conducted paddy soil field experiments under three different treatments (no fertilization, base fertilization, and organic fertilization) to investigate the contribution of organic fertilization to soil nutrients and the functional microorganisms associated with GHG emissions. We found that organic fertilization effectively increased the soil organic matter (P < 0.001), soil organic carbon (P < 0.001), and total nitrogen (P < 0.05) as well as the richness (operational taxonomic units and abundance-based coverage estimators) of the methanogenic communities. Correlation analyses showed that methanogenic communities that were present in abundance were more vulnerable to perturbations in soil properties compared to nitrifying bacterial communities. Partial least squares path model analyses elucidated that organic fertilization directly affected both methanogenic communities and nitrifying bacterial communities (P < 0.05), thereby accelerating methane emissions. Strong co-occurrence networks were observed within the soil-dominant phyla Acidobacteria, Bacteroidetes, and Proteobacteria. Our findings highlight the impact of organic fertilization on soil nutrients and functional microorganisms and guide mitigating GHG emissions from paddy soil agroecosystems.
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Affiliation(s)
- Xinxin You
- Wenzhou Vocational College of Science and Technology, Wenzhou, Zhejiang Province, 325006, PR China
| | - Sheng Wang
- Wenzhou Vocational College of Science and Technology, Wenzhou, Zhejiang Province, 325006, PR China
| | - Linna Du
- Wenzhou Vocational College of Science and Technology, Wenzhou, Zhejiang Province, 325006, PR China; Wencheng Institution of Modern Agriculture and Health-Care Industry, Wenzhou, Zhejiang Province, 325300, PR China.
| | - Huan Wu
- Wenzhou University, Wenzhou, Zhejiang Province, 325027, PR China
| | - Yi Wei
- Wenzhou University, Wenzhou, Zhejiang Province, 325027, PR China
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Chen Z, Dolfing J, Zhuang S, Wu Y. Periphytic biofilms-mediated microbial interactions and their impact on the nitrogen cycle in rice paddies. ECO-ENVIRONMENT & HEALTH (ONLINE) 2022; 1:172-180. [PMID: 38075597 PMCID: PMC10702904 DOI: 10.1016/j.eehl.2022.09.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 01/03/2024]
Abstract
Rice paddies are unique waterlogged wetlands artificially constructed for agricultural production. Periphytic biofilms (PBs) at the soil-water interface play an important role in rice paddies characterized by high nutrient input but low utilization efficiency. PBs are composed of microbial aggregates, including a wide variety of microorganisms (algae, bacteria, fungi, protozoa, and metazoa), extracellular polymeric substances and minerals (iron, aluminum, and calcium), which form an integrated food web and energy flux within a relatively stable micro-ecosystem. PBs are crucial to regulate and streamline the nitrogen cycle by neutralizing nitrogen losses and improving rice production since PBs can serve as both a sink by capturing surplus nitrogen and a source by slowly re-releasing this nitrogen for reutilization. Here the ecological advantages of PBs in regulating the nitrogen cycle in rice paddies are illustrated. We summarize the key functional importance of PBs, including the intricate and delicate community structure, microbial interactions among individual phylotypes, a wide diversity of self-produced organics, the active adaptation of PBs to constantly changing environments, and the intricate mechanisms by which PBs regulate the nitrogen cycle. We also identify the future challenges of microbial interspecific cooperation in PBs and their quantitative contributions to agricultural sustainability, optimizing nitrogen utilization and crop yields in rice paddies.
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Affiliation(s)
- Zhihao Chen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- Zigui Three Gorges Reservoir Ecosystem, Observation and Research Station of Ministry of Water Resources of the People's Republic of China, Yichang 443605, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jan Dolfing
- Faculty of Energy and Environment, Northumbria University, Newcastle Upon Tyne NE1 8QH, UK
| | - Shunyao Zhuang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yonghong Wu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- Zigui Three Gorges Reservoir Ecosystem, Observation and Research Station of Ministry of Water Resources of the People's Republic of China, Yichang 443605, China
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9
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Ma C, Wu J, Li F. Impacts of combined water-saving irrigation and controlled-release urea on CH 4 emission and its associated microbial communities and function. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 830:154724. [PMID: 35331759 DOI: 10.1016/j.scitotenv.2022.154724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/02/2022] [Accepted: 03/17/2022] [Indexed: 06/08/2023]
Abstract
Water-saving irrigation and controlled-release nitrogen fertilizer are used in rice farming. The aim of this study was to understand the effects of water-saving irrigation and controlled-release urea on methane (CH4) emission and its associated microbial communities and function. A field experiment was conducted with two nitrogen treatments (NU 100% normal urea, CU 60% normal urea and 40% controlled-release urea, total N amount was the same) and three irrigation modes (CI continuous flooding irrigation, AI alternate wetting and drying irrigation, RI ridge irrigation). CH4 fluxes, organic acid contents and enzyme activities were measured, and soil microbial communities and function were investigated by whole-genome shotgun sequencing analysis, and then their relationships were analyzed by Spearman correlation analysis, redundancy analysis and mantel test. Compared to CI, AI and RI decreased cumulative CH4 emissions by 43.5% and 25.8% in NU, and 64.9% and 13.3% in CU, respectively. Among all treatments, AICU had the lowest CH4 emission and reduced it by 72.2% compared to CINU. AI and RI had higher contents of some organic acids than CI. Compared to CINU, AICU decreased the relative abundance of Methanosarcina barkeri and associated genes in the CO2-reduction methanogenesis pathway by 83.4% and 91.0%. Both abundance of methanogens and associated genes in the CO2-reduction methanogenesis pathway were positively correlated with cumulative CH4 emission, but negatively correlated with most soil organic acids. Thus AICU can mitigate CH4 emission by decreasing the abundance of methanogens and associated genes in the CO2-reduction methanogenesis pathway.
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Affiliation(s)
- Chenlei Ma
- College of Agriculture, Guangxi University, Nanning 530005, China
| | - Jiafa Wu
- College of Agriculture, Guangxi University, Nanning 530005, China; School of Marine Sciences and Biotechnology and Guangxi Key Laboratory for Polysaccharide Materials and Modifications, Guangxi University for Nationalities, Nanning 530008, China
| | - Fusheng Li
- College of Agriculture, Guangxi University, Nanning 530005, China.
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Nan Q, Fang C, Cheng L, Hao W, Wu W. Elevation of NO 3--N from biochar amendment facilitates mitigating paddy CH 4 emission stably over seven years. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 295:118707. [PMID: 34923062 DOI: 10.1016/j.envpol.2021.118707] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/06/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Biochar application into paddy is an improved strategy for addressing methane (CH4) stimulation of straw biomass incorporation. Whereas, the differentiative patterns and mechanisms on CH4 emission of straw biomass and biochar after long years still need to be disentangled. Considering economic feasibility, a seven-year of field experiment was conducted to explore the long-term CH4 mitigation effect of annual low-rate biochar incorporation (RSC, 2.8 t ha-1), with annual rice straw incorporation (RS, 8 t ha-1) and control (CK, with no biochar or rice straw amendment incorporation) as a comparation. Results showed that RSC mitigated CH4 emission while RS stimulated CH4 significantly (p < 0.05) and stably over 7 experimental years compared with CK. RSC mitigated 14.8-46.7% of CH4 emission compared with CK. In comparison to RSC, RS increased 111-950.5% of CH4 emission during 7 field experimental years. On the 7th field experimental year, pH was significantly increased both in RS and RSC treatment (p < 0.05). RSC significantly (p < 0.05) increased soil nitrate (NO3--N) compared with RS while RS significantly (p < 0.05) increased dissolved carbon (DOC) compared to RSC. Soil NO3--N inhibition on methanogens and promotion on methanotrophs activities were verified by laboratory experiment, while soil pH and DOC mainly promoted methanogens abundance. Significantly (p < 0.05) increased DOC and soil pH enhanced methanogens growth and stimulated CH4 emission in RS treatment. Higher soil NO3--N content in RSC than CK and RS contributed to CH4 mitigation. Soil NO3--N and DOC were identified as the key factors differentiating CH4 emission patterns of RS and RSC in 2019. Collectively, soil NO3--N impacts on CH4 flux provide new ideas for prolonged effect of biochar amendment on CH4 mitigation after years.
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Affiliation(s)
- Qiong Nan
- Institute of Environment Pollution Control and Treatment, College of Environment and Resource Science, Zhejiang University, Hangzhou, 310029, PR China
| | - Chenxuan Fang
- Institute of Environment Pollution Control and Treatment, College of Environment and Resource Science, Zhejiang University, Hangzhou, 310029, PR China
| | - Linqi Cheng
- Institute of Environment Pollution Control and Treatment, College of Environment and Resource Science, Zhejiang University, Hangzhou, 310029, PR China
| | - Wang Hao
- Institute of Environment Pollution Control and Treatment, College of Environment and Resource Science, Zhejiang University, Hangzhou, 310029, PR China
| | - Weixiang Wu
- Institute of Environment Pollution Control and Treatment, College of Environment and Resource Science, Zhejiang University, Hangzhou, 310029, PR China.
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Sakoda M, Tokida T, Sakai Y, Senoo K, Nishizawa T. Mitigation of Paddy Field Soil Methane Emissions by Betaproteobacterium Azoarcus Inoculation of Rice Seeds. Microbes Environ 2022; 37:ME22052. [PMID: 36517028 PMCID: PMC9763044 DOI: 10.1264/jsme2.me22052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Paddy fields are a major source of atmospheric methane, a greenhouse gas produced by methanogens and consumed by methanotrophs in flooded soil. The inoculation of rice seeds with the bacterium Azoarcus sp. KH32C alters the rice root-associated soil bacterial community composition. The present study investigated the effects of KH32C-inoculated rice cultivation on soil methanogens and methanotrophs involved in methane emissions from a rice paddy field. KH32C-inoculated and non-inoculated rice (cv. Nipponbare) were cultivated in a Japanese rice paddy with and without nitrogen fertilizer. Measurements of methane emissions and soil solution chemical properties revealed increases in methane flux over the waterlogged period with elevations in the concentrations of dissolved methane, dissolved organic carbon, and ferrous iron, which is an indicator of soil reduction levels. Reverse transcription quantitative PCR and amplicon sequencing were used to assess the transcription of the methyl-coenzyme M reductase gene (mcrA) from methanogens and the particulate methane monooxygenase gene (pmoA) from methanotrophs in paddy soil. The results obtained showed not only the transcript copy numbers, but also the compositions of mcrA and pmoA transcripts were related to methane flux. KH32C-inoculated rice cultivation recruited soil methanogens and methanotrophs that suppressed high methane synthesis, increased methane consumption, and decreased methane emissions by 23.5 and 17.2% under non-fertilized and nitrogen-fertilized conditions, respectively, while maintaining rice grain yield. The present study demonstrated the mitigation of paddy field methane emissions arising from the use of KH32C in rice cultivation due to its influence on the compositions of soil methanogen and methanotroph populations.
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Affiliation(s)
- Midori Sakoda
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo 183–8509, Japan
| | - Takeshi Tokida
- Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Ibaraki 305–8604, Japan
| | - Yoriko Sakai
- Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Ibaraki 305–8604, Japan
| | - Keishi Senoo
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113–8657, Japan,Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113–8657, Japan
| | - Tomoyasu Nishizawa
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo 183–8509, Japan,Ibaraki University College of Agriculture, Ibaraki 300–0393, Japan, Corresponding author. E-mail: ; Tel: +81–29–888–8684; Fax: +81–29–888–8525
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Ndoung OCN, Figueiredo CCD, Ramos MLG. A scoping review on biochar-based fertilizers: enrichment techniques and agro-environmental application. Heliyon 2021; 7:e08473. [PMID: 34917792 PMCID: PMC8646155 DOI: 10.1016/j.heliyon.2021.e08473] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/15/2021] [Accepted: 11/22/2021] [Indexed: 12/28/2022] Open
Abstract
Biochar is a carbonized biomass that can be used as a soil amendment. However, the exclusive use of biochar may present some limitations, such as the lack of nutrients. Thus, biochar enrichment techniques have made it possible to obtain biochar-based fertilizers (BCFs), with great potential to improve soil fertility. Nevertheless, there is still a lack of information about the description, advantages, and limitations of the methods used for biochar enrichment. This review provides a comprehensive overview of the production methods of enriched biochar and its performance in agriculture as a soil amendment. Studies demonstrate that the application of BCF is more effective in improving soil properties and crop yields than the exclusive application of pure biochar or other fertilizers. The post-pyrolysis method is the most used technique for enriching biochar. Future studies should focus on understanding the mechanisms of the long-term application of BCFs.
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