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Zhong L, Li X, Sun Y, Xiao H, Tang Y, Wang R, Su X. Effects of microplastics on N 2O production and reduction potential in crop soils of northern China. Chemosphere 2024; 351:141256. [PMID: 38246503 DOI: 10.1016/j.chemosphere.2024.141256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/27/2023] [Accepted: 01/17/2024] [Indexed: 01/23/2024]
Abstract
Microplastics (MPs) pollution are found to be increasing in vegetable soils and potentially affecting N2O production and their associated pathways; however, its specific effects remain unclear. Here, we selected two common MPs, PE and PP at four different concentration levels of 0, 0.5, 1.5 and 3%, and conducted several incubation experiments aiming to explore soil bacterial and fungal N2O production. Results showed that the bacteria were the main contributors for the production of N2O, regardless of the absence or presence of MPs; and its contribution was decreased with increasing concentrations of PE and PP. The nosZ clade I and II genes were positively correlated with N2O reduction rates, indicating a combined regulation on soil N2O reduction. PE significantly inhibited the bacterial nitrification and denitrification, but did not affect the total N2O production rates; while PP significantly reduced both the bacterial and fungal N2O production rates. The resistance of fungal N2O production to MPs pollution was stronger than that of the bacterial N2O production. It highlights that the MPs pollution could reduce the potential of N2O production and reduction, and thus disturb soil nitrogen cycling system; while the inhibition on N2O production via bacteria and fungi varies with different types of MPs. This study is conducive to an improved and more comprehensive understanding of the ecological impacts of MPs within the agroecosystem.
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Affiliation(s)
- Lei Zhong
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China.
| | - Xinhao Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Yuru Sun
- Beijing Construction Engineering Group Environmental Remediation Co., Ltd, National Engineering Laboratory for Site Remediation Technologies, Beijing, 100015, China
| | - Hui Xiao
- Institute of Agricultural Resources and Environment, Tianjin Academy of Agricultural Sciences, Tianjin, 300384, China
| | - Yafang Tang
- Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, College of Life Science and Technology, Hubei Engineering University, Xiaogan, China
| | - Ruying Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Xiaoxuan Su
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China.
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Qi JQ, Yuan HY, Zhuang QL, Zama EF, Tian XF, Tao BX, Zhang BH. Effect of different types of biochar on soil properties and functional microbial communities in rhizosphere and bulk soils and their relationship with CH 4 and N 2O emissions. Front Microbiol 2023; 14:1292959. [PMID: 38029118 PMCID: PMC10656817 DOI: 10.3389/fmicb.2023.1292959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
Biochar as an agricultural soil amendment plays vital roles in mediating methane (CH4) and nitrous oxide (N2O) emissions in soils. The link between different types of biochar, bulk soil, and rhizosphere microbial communities in relation to CH4 and N2O emissions is being investigated in this study. The rice pot experiment was conducted using biochar at two temperatures (300°C and 500°C) in combination with three biochar levels (0, 2, 10% w/w). Soil properties and the abundance of genes associated with CH4 and N2O emissions from both rhizosphere and bulk soils were investigated. The study also aimed to examine the structure of microbial communities (pmoA, nosZ) in rhizosphere and bulk soils whereas CH4 and N2O emissions were monitored while growing rice. Results showed that biochar at 300°C and 10% incorporation significantly increased the CH4 emissions by up to 59% rise compared to the control group. Random Forest analysis revealed that the ratio of mcrA/pmoA along with the abundance of mcrA from both rhizosphere and bulk soils, the abundance of AOA, TN, DOC, and the community composition of pmoA-harboring microorganisms from both bulk and rhizosphere soils were important predictors of CH4 emissions. Therefore, the ratio of mcrA/pmoA in rhizosphere soil and the abundance of AOA in bulk soil were the main factors influencing CH4 emissions. Variation Partitioning Analysis (VPA) results indicated that the effects of these factors on bulk soil were 9% of CH4 emissions variations in different treatments, which contributed more than rhizosphere soils' factors. Moreover, random forest analysis results indicated that the abundance of AOB in bulk soil was the most important predictor influencing N2O emissions. The VPA result revealed that the factors in rhizosphere soil could explain more than 28% of the variations in N2O emissions. Our study highlights that rhizosphere soil has a more significant effect than bulk soil on N2O production. Our findings further the understanding of the link between bulk and rhizosphere attributes, and their impact on CH4 and N2O emissions in paddy soils. In summary, we recommend the application of biochar at 500°C and 2% incorporation rate for agricultural production in the area.
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Affiliation(s)
- Jian-Qing Qi
- School of Geography and Environment, Liaocheng University, Liaocheng, China
| | - Hai-Yan Yuan
- School of Geography and Environment, Liaocheng University, Liaocheng, China
| | - Qi-Lu Zhuang
- School of Geography and Environment, Liaocheng University, Liaocheng, China
| | - Eric-Fru Zama
- Department of Agricultural and Environmental Engineering, College of Technology, University of Bamenda, Bambili, Cameroon
| | - Xiao-Fei Tian
- School of Geography and Environment, Liaocheng University, Liaocheng, China
| | - Bao-Xian Tao
- School of Geography and Environment, Liaocheng University, Liaocheng, China
| | - Bao-Hua Zhang
- School of Geography and Environment, Liaocheng University, Liaocheng, China
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Fudjoe SK, Li L, Anwar S, Shi S, Xie J, Yeboah FK, Wang L. The impact of fertilization on ammonia-oxidizing bacteria and comammox Nitrospira communities and the subsequent effect on N 2O emission and maize yield in a semi-arid region. Front Microbiol 2023; 14:1249668. [PMID: 37840719 PMCID: PMC10570556 DOI: 10.3389/fmicb.2023.1249668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/06/2023] [Indexed: 10/17/2023] Open
Abstract
The control of nitrous oxide (N2O) emissions through nitrification and the optimization of maize yield are important in agricultural systems. However, within the semi-arid region, the impact of fertilization on the function of nitrification communities and its connection with N2O emissions in the rhizosphere soil is still unclear. Our study investigates the influence of fertilization treatments on the communities of ammonia-oxidizing bacteria (AOB) and the complete ammonia oxidizers of the Nitrospira known as comammox (CAOB) in a maize agroecosystem. Nitrous oxide production, potential nitrification activity (PNA), maize yield, and nitrogen use efficiency (NUE) were determined for the same samples. The fertilizer treatments included a control group without fertilization (NA), inorganic fertilizer (CF), organic fertilizer (SM), combined inorganic and organic fertilizer (SC), and maize straw (MS). The SC treatment indicated a lower cumulative N2O emission than the CF treatment in the 2020 and 2021 cropping seasons. The AOB community under the CF, MS, and SM treatments was predominantly composed of Nitrosospira cluster 3b, while the SC treatment was associated with the comammox Nitrospira clade A.1 lineage, related to key species such as Ca. Nitrospira inopinata and Ca. Nitrospira nitrificans. Network analysis demonstrated a positive potential for competitive interaction between hub taxonomy and distinct keystone taxa among AOB and comammox Nitrospira nitrifiers. The structural equation model further revealed a significant positive association between AOB nitrifiers and N2O emission, PNA, soil pH, SOC, NO 3 - -N, and DON under organic fertilization. The keystone taxa in the comammox Nitrospira nitrifier and network Module II exhibited a positive correlation with maize productivity and NUE, likely due to their functional activities stimulated by the SC treatment. It is noteworthy that the AOB community played a more significant role in driving nitrification compared to the composition of comammox Nitrospira. Collectively, combined inorganic and organic fertilizer (SC) treatment exhibits high potential for reducing N2O emissions, enhancing maize productivity, increasing NUE, and increasing the sustainability of the nitrogen dynamics of maize agroecosystems in the semi-arid Loess Plateau.
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Affiliation(s)
- Setor Kwami Fudjoe
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Lingling Li
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Sumera Anwar
- Department of Botany, Government College Women University Faisalabad, Faisalabad, Pakistan
| | - Shangli Shi
- College of Grassland Science, Gansu Agricultural University, Lanzhou, China
| | - Junhong Xie
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Frederick Kwame Yeboah
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, China
| | - Linlin Wang
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
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Carreras-Sempere M, Biel C, Viñas M, Guivernau M, Caceres R. The use of recovered struvite and ammonium nitrate in fertigation in a horticultural rotation: agronomic and microbiological assessment. Environ Technol 2022:1-17. [PMID: 36453585 DOI: 10.1080/09593330.2022.2154172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Phosphorus and nitrogen recovery from wastewater as struvite and ammonium nitrate (AN) may be viable alternative fertilizers to boost circularity in horticulture. A 2-year fertigated crop rotation in soil under greenhouse conditions was evaluated to determine the efficiency of both recovered products as raw materials for a nutrient solution (NS) manufacture. The effects of these treatments versus synthetic fertilizers were compared in terms of crop performance, plant nutrient uptake, soil chemistry and microbiota. This is the first study to implement struvite through fertigation as the sole source of P in soil crops. Results showed that both recovered products can be used as fertilizers in NS, due to the similar response to the control for different parameters and crops (tomato, lettuce, and cauliflower). However, the AN treatment showed lower yield in the first tomato crop, which results may depend on the cultivar ammonium tolerance. Besides, the concentration of heavy metals in fruits/leaves was below the permissible limits. Total and Olsen phosphorus soil analysis revealed no differences among treatments, resulting in a similar performance of P-struvite to commercial phosphate. Bulk soil bacteria structure, richness and relative dominance were increased over time, while archaea only showed lower evenness, both despite the fertilization strategy. Shannon diversity was not significantly affected. A predominance of ammonia-oxidizing bacteria (AOB) versus archaea (AOA) was observed, while nitrite-oxidizing bacteria (NOB), dominated by Nitrospira, increased with fertigation. Our results demonstrate that fertilizer blends for NS containing recovered nutrients are a feasible alternative to synthetic fertilizers.
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Affiliation(s)
- Mar Carreras-Sempere
- Sustainable Plant Protection Program, Institute of Agrifood Research and Technology (IRTA), Cabrils, Spain
- Sustainability in Biosystems Program, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, Spain
| | - Carmen Biel
- Sustainable Plant Protection Program, Institute of Agrifood Research and Technology (IRTA), Cabrils, Spain
| | - Marc Viñas
- Sustainability in Biosystems Program, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, Spain
| | - Miriam Guivernau
- Sustainability in Biosystems Program, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, Spain
| | - Rafaela Caceres
- Sustainable Plant Protection Program, Institute of Agrifood Research and Technology (IRTA), Cabrils, Spain
- Sustainability in Biosystems Program, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, Spain
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Zhao Z, Zhang Y, Sun P, Wang Q, Ruan Y. Effects of biochar and chemical fertilizer amendment on diazotrophic abundance and community structure in rhizosphere and bulk soils. Environ Sci Pollut Res Int 2022; 29:62361-62370. [PMID: 35397032 DOI: 10.1007/s11356-022-20086-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
Diazotrophs carry out biological nitrogen (N) fixation process that replenishes available soil N; it is unclear how soil diazotrophic communities respond to biochar and chemical fertilizer amendment in agricultural ecosystem. Herein, we studied the impacts of biochar and chemical fertilizer amendment on diazotrophic communities in rhizosphere and bulk soils using nifH gene. The field experiment included four treatments: control (CK), biochar (B), chemical NPK fertilizer (CF), and biochar + chemical fertilizer (B + CF). nifH gene abundance in rhizosphere soils ranged from 9.00 × 107 to 2.57 × 108 copies g-1 dry soil among the different treatments, which was 1.42-2.68 times higher compared with the bulk soils ranging from 5.83 × 107 to 1.19 × 108 copies g-1 dry soil. Single application of biochar increased the abundance of nifH gene, whereas chemical fertilizer addition significantly decreased it in the bulk and rhizosphere soils. Single biochar addition affected diazotrophic community composition in rhizosphere soil, but not in the bulk soil. However, both CF and B + CF treatments obviously changed the community structure of diazotrophs in both soils. Moreover, rhizosphere effect enhanced nifH gene abundance and significantly altered the diazotrophic community structure compared to bulk soil. Phylogenetic analysis showed that all nifH sequences were affiliated to the cyanobacteria, α-, β-, γ-, and δ- subclasses of the proteobacteria group. Soil nutrient availability rather than pH had significant impacts on diazotrophic community structure based on mantel test and redundancy analysis. Overall, biochar improves the diazotrophic abundance, while chemical fertilization negatively affects it by altering nutrient availability, and combined application of biochar and chemical fertilizer does not counteract the adverse influences of chemical fertilizer on nitrogen-fixing microorganisms.
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Affiliation(s)
- Ziting Zhao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bio-Resources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Yanshu Zhang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bio-Resources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Ping Sun
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bio-Resources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Qing Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bio-Resources, College of Tropical Crops, Hainan University, Haikou, 570228, China.
| | - Yunze Ruan
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bio-Resources, College of Tropical Crops, Hainan University, Haikou, 570228, China
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