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Liu WJ, Luo MT, Qiu RL, Xie KT, Long XX. Colloid phosphorus transport in agricultural soils: a critical review of content characteristics, migration mechanisms, and environmental drivers. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 387:125913. [PMID: 40412176 DOI: 10.1016/j.jenvman.2025.125913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2025] [Revised: 05/14/2025] [Accepted: 05/19/2025] [Indexed: 05/27/2025]
Abstract
Soil phosphorus (P) loss through runoff is a significant contributor to waterbody eutrophication, particularly in regions of intensive agricultural production. One critical pathway for P loss is the migration of soil colloid-facilitated P (Pcoll), which warrants attention. However, the mechanisms underlying the generation, release, and migration of soil Pcoll remain poorly understood. This paper comprehensively reviews recent advancements in the technical methods for the extraction, separation, and physicochemical characterization of soil Pcoll. Utilizing data from published literature, we compile Pcoll contents across various soil types, with a focus on comparing Pcoll levels in agricultural soils characterized by different soil textures, fertilization treatments, and land use practices. Additionally, we analyze the relationships between soil main physicochemical parameters including pH, total organic carbon (TOC), total phosphorus (total P), and available phosphorus (available P), colloidal organic carbon (OC), calcium (Ca), magnesium (Mg), iron (Fe), and aluminum (Al) and Pcoll content. This review also summarizes the pathways of soil Pcoll loss, including surface runoff and subsurface runoff, along with the major influencing factors such as colloid properties, soil aggregates, pore structure, soil solution chemistry, crop planting structure, and fertilization management. Finally, we discuss future research directions concerning soil Pcoll, which include the establishment of standardized methods for Pcoll collection, a deeper understanding of Pcoll composition and distribution at the molecular level, investigations into the coupling effects of soil OC turnover and Pcoll cycling, and elucidating Pcoll loss mechanisms across multiple scales. Overall, this review aims to address existing gaps and shortcomings in soil Pcoll research and provide theoretical guidance for future studies.
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Affiliation(s)
- Wen-Jing Liu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, Guangdong, China
| | - Man-Tong Luo
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, Guangdong, China
| | - Rong-Liang Qiu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
| | - Ke-Tan Xie
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, Guangdong, China
| | - Xin-Xian Long
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
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Yin M, Zhang J, Du L, Ding L, Zhong T, Tian P, Yang R. Effects of irrigation and organic fertilizer on pumpkin yield, quality, and water-fertilizer use efficiency in arid northwest China. FRONTIERS IN PLANT SCIENCE 2025; 16:1517761. [PMID: 39990716 PMCID: PMC11842265 DOI: 10.3389/fpls.2025.1517761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2024] [Accepted: 01/20/2025] [Indexed: 02/25/2025]
Abstract
Due to the increasing water scarcity and the need for sustainable agricultural practices in arid regions, optimizing water and fertilizer management is crucial for enhancing crop productivity and resource efficiency. Field experiments in 2022 and 2023 in northwestern China's arid region explored the impacts of irrigation volume, organic fertilizer use, and their coupling on pumpkin yield, quality, and water-fertilizer efficiency. The study included ten treatments with a completely randomized two-factor design, comprising three irrigation quotas, three organic fertilizer application rates and a control group (CK). The results showed that the organic fertilizer application significantly enhanced soil moisture content, which peaked at a depth of 50 cm. Irrigation quota and organic fertilizer application had a highly significant impact on pumpkin vine length and stem diameter (P < 0.01), with a significant interaction between the two factors (P < 0.05). The rate of dry matter accumulation in pumpkin peaked at 60 ~ 80 days after sowing, with a trend of F2 > F3 > F1 in dry matter accumulation at identical irrigation quota. The effects of irrigation volume, organic fertilizer application and water-fertilizer coupling on pumpkin yield, irrigation water use efficiency (IWUE), partial fertilizer productivity (PFP) and pumpkin quality were statistically highly significant (P < 0.01). Specifically, increasing the irrigation volume from W1 to W3 increased the yield by 17.36%. However, pumpkin yield initially increased and then decreased in response to increasing organic fertilizer application. IWUE increased and then decreased with the increase of organic fertilizer application, while PFP increased with the increase of irrigation volume. Regression analysis revealed that the optimal range for irrigation quota to ensure pumpkin quality was 430 ~ 506 m3·ha-1, and that for organic fertilizer application was 5,373 ~ 6,570 kg·ha-1. When only quality indicators were considered, the W2F2 treatment performed well. However, from the comprehensive evaluation of pumpkin yield, quality, and water and fertilizer use efficiency using the TOPSIS method, the W3F2 treatment was identified as the most suitable among the water- fertilizer coupling management modes considered in this study for pumpkin cultivation in the arid northwestern China.
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Affiliation(s)
- Meng Yin
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
| | - Jinxia Zhang
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
| | - Liangliang Du
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
| | - Lin Ding
- Rural Water Conservancy Institute, Gansu Academy for Water Conservancy, Lanzhou, China
| | - Tao Zhong
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
| | - Pengliang Tian
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
| | - Runheng Yang
- College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou, China
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Ighalo JO, Ohoro CR, Ojukwu VE, Oniye M, Shaikh WA, Biswas JK, Seth CS, Mohan GBM, Chandran SA, Rangabhashiyam S. Biochar for ameliorating soil fertility and microbial diversity: From production to action of the black gold. iScience 2025; 28:111524. [PMID: 39807171 PMCID: PMC11728978 DOI: 10.1016/j.isci.2024.111524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2025] Open
Abstract
This article evaluated different production strategies, characteristics, and applications of biochar for ameliorating soil fertility and microbial diversity. The biochar production techniques are evolving, indicating that newer methods (including hydrothermal and retort carbonization) operate with minimum temperatures, yet resulting in high yields with significant improvements in different properties, including heating value, oxygen functionality, and carbon content, compared to the traditional methods. It has been found that the temperature, feedstock type, and moisture content play critical roles in the fabrication process. The alkaline nature of biochar is attributed to surface functional groups and addresses soil acidity issues. The porous structure and oxygen-containing functional groups contribute to soil microbial adhesion, affecting soil health and nutrient availability, improving plant root morphology, photosynthetic pigments, enzyme activities, and growth even under salinity stress conditions. The review underscores the potential of biochar to address diverse agricultural challenges, emphasizing the need for further research and application-specific considerations.
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Affiliation(s)
- Joshua O. Ighalo
- Department of Chemical Engineering, Nnamdi Azikiwe University, Awka P. M. B. 5025, Nigeria
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, USA
| | - Chinemerem R. Ohoro
- Water Research Group, Unit for Environmental Sciences and Management, North-West University, 11 Hoffman St, Potchefstroom 2520, South Africa
| | - Victor E. Ojukwu
- Department of Chemical Engineering, Nnamdi Azikiwe University, Awka P. M. B. 5025, Nigeria
| | - Mutiat Oniye
- Department of Chemical and Material Science, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan
| | - Wasim Akram Shaikh
- Department of Basic Science, School of Science and Technology, The Neotia University, Sarisha, West Bengal 743368, India
| | - Jayanta Kumar Biswas
- Enviromicrobiology, Ecotoxicology and Ecotechnology Research Laboratory (3E-MicroToxTech Lab), International Centre for Ecological Engineering & Department of Ecological Studies, University of Kalyani, Kalyani, Nadia, West Bengal 741235, India
| | | | - Ganesh Babu Malli Mohan
- Department of Cellular Biology, Center for Tropical and Emerging Global Diseases (CTEGD), University of Georgia, Athens, GA, USA
| | - Sam Aldrin Chandran
- School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur 613401, Tamil Nadu, India
| | - Selvasembian Rangabhashiyam
- Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India
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Ding S, Zhang S, Wang Y, Chen S, Chen Q. Restricted colloidal-bound phosphorus release controlled by alternating flooding and drying cycles in an alkaline calcareous soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 343:123204. [PMID: 38142807 DOI: 10.1016/j.envpol.2023.123204] [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: 09/11/2023] [Revised: 12/11/2023] [Accepted: 12/20/2023] [Indexed: 12/26/2023]
Abstract
Colloid-facilitated phosphorus (P) migration plays an important role in P loss from farmland to adjacent water bodies. However, the dynamics of colloidal P (Pcoll) release as influenced by irrigation in alkaline calcareous soil remains a knowledge gap. The present study, monitored the dynamic change of Pcoll under different water management strategies: 1) control, 2) flooding, and 3) alternating flooding and drying cycles. Soil water-dispersible colloids (0.6 nm-1 μm) were extracted by combining filtration and ultrafiltration methods. The contents of P, cation and organic carbon in the water-dispersible colloids were determined and the stability and mineral composition of colloidal fractions were characterized. The results showed that Pcoll ranged from 16.5 to 25.5 mg kg-1 and represented 42.8%-64.9% of the water-extracted P in the control. Flooding significantly decreased the Pcoll content by 16.0%-62.1% (mean 32.7%) and it may be attributed to the dissolution of colloidal iron (Fe) bound P. The alternating flooding and drying treatment significantly reduced the Pcoll content by 11.6%-88.0% (mean 67.6%). The Pcoll content of the flooding event was always greater than the Pcoll content of the drying event during flooding and drying cycles. Redundancy analysis and random forest modeling showed that the colloidal calcium (Ca) and ionic strength in soil solutions had negative correlations with the Pcoll content, and pH, ionic strength and truly dissolved P were the critical factors affecting Pcoll. Drying of the flooded soil led to the decrease of pH and the increase of ionic strength, colloidal Ca content and positive charges of colloid surfaces, which promoted colloid aggregation and enhanced soil P sorption capacity. This restricted the loss potential of Pcoll. In summary, controlled flooding and drainage when managed correctly have a role to play in mitigating Pcoll loss from P-enriched calcareous soils.
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Affiliation(s)
- Shuai Ding
- Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan Xilu, Haidian, Beijing, 100193, PR China
| | - Shuai Zhang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan Xilu, Haidian, Beijing, 100193, PR China; Key Laboratory of Arable Land Quality Monitoring and Evaluation, State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, PR China.
| | - Yang Wang
- College of Land Science and Technology, China Agricultural University, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, 100193, PR China
| | - Shuo Chen
- Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan Xilu, Haidian, Beijing, 100193, PR China
| | - Qing Chen
- Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan Xilu, Haidian, Beijing, 100193, PR China
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Ahmed MMM, Chen KY, Tsao FY, Hsieh YC, Liu YT, Tzou YM. Promotion of phosphate release from humic acid-iron hydroxide coprecipitates in the presence of citric acid. ENVIRONMENTAL RESEARCH 2024; 240:117517. [PMID: 37914010 DOI: 10.1016/j.envres.2023.117517] [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: 07/17/2023] [Revised: 10/15/2023] [Accepted: 10/24/2023] [Indexed: 11/03/2023]
Abstract
Phosphate (P) resources are expected to be depleted within a century. Therefore, promoting balanced phosphorus fertilizer use and understanding phosphorus dynamics in soils containing iron (III), organic acids, and iron (III)-organic molecule particulates is crucial. This study investigated the sorption of citric acid onto humic acid-iron hydr(o)xide coprecipitate (HAFHCP) and the reciprocal effects of citric acid and P sorption on HAFHCP with different C/Fe ratios. The results showed that the maximum sorption capacity (MSC) of citric acid on HAFHCP decreased with increasing C/Fe ratios in the HAFHCP. The P sorption on HAFHCP pre-sorbed with citric acids (denoted as C-P) decreased by 50% compared with that of the MSC on FH. However, citric acids could only reduce P sorption by 20% when P was pre-sorbed on HAFHCP (denoted as P-C). The results suggested that upon the formation of HAFHCP, citric acids might increase P availability, especially in the C-P system. Although citric acids initially inhibited P sorption on HAFHCP in the P-C system, P sorption increased with prolonged reaction time. The exposures of new sorption sites upon dissolution of Fe from HAFHCP by citric acids or/and the formations of Fe bridge between P and organic domains of HAFHCP might contribute to these results. Additionally, a number of large HAFHCP aggregates became smaller while sorbing P due to the increasing electric repulsion on the surfaces of FH, enabling the subsequent dissolutions of more Fe by citric acids from HAFHCP in the P-C system. By integrating these innovative and sustainable strategies, the recycling and reuse of P can be optimized, thereby minimizing the reliance on synthetic fertilizers and mitigating environmental impacts. This approach fosters the efficient utilization of phosphorus resources, improves soil fertility, and enhances the overall resilience of agricultural systems and ecosystems.
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Affiliation(s)
- M M M Ahmed
- Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 40227, Taiwan
| | - Kai-Yue Chen
- Professional Bachelor Program of Farm Management, National Chiayi University, Chiayi, 600355, Taiwan
| | - Fang-Yu Tsao
- Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 40227, Taiwan
| | - Yi-Cheng Hsieh
- Office of the Texas State Chemist, Texas A&M AgriLife Research, Texas A&M University System, College Station, TX, 77843, USA
| | - Yu-Ting Liu
- Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 40227, Taiwan; Innovation and Development Centre of Sustainable Agriculture, National Chung Hsing University, Taichung, 40227, Taiwan.
| | - Yu-Min Tzou
- Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung, 40227, Taiwan; Innovation and Development Centre of Sustainable Agriculture, National Chung Hsing University, Taichung, 40227, Taiwan.
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Jin J, Fang Y, Liu C, Eltohamy KM, He S, Li F, Lu Y, Liang X. Reduced colloidal phosphorus release from paddy soils: A synergistic effect of micro-/nano-sized biochars and intermittent anoxic condition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167104. [PMID: 37717774 DOI: 10.1016/j.scitotenv.2023.167104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/09/2023] [Accepted: 09/13/2023] [Indexed: 09/19/2023]
Abstract
Colloidal phosphorus (CP) has high mobility and great loss risk; their biogeochemical processes are influenced by agricultural management such as redox oscillation and biochar-amendment application. This study monitored CP concentration in pore-water, soil P species and P adsorption capacity, to investigate CP release from paddy soils as affected by the interactive effects of oxygen status (continuous anoxic/oxic for 12 days, CA/CO; intermittent anoxic for 2, 4, 6, 8, 10 days during the 12-day cycle, IA2-10) and management (soil only, CK; bulk/micro/nano-sized biochar with various properties: SBBulk, SBMicro, and SBNano). Compared to the control (0.25-0.84 mg L-1, CK-CA), the single intermittent anoxic treatment (CK-IA) reduced CP concentrations by 45 %, due to the rise of Eh and pH and the decline of the degree of P saturation along with the increased soil Fe/Al-P and organic-P. Longer anoxic duration under the CK-IA reduced CP release, probably donated from massive production of redox-stable amorphous Fe/Al-bound P. The single biochar treatment (SB-CA: SBBulk-CA > SBMicro-CA > SBNano-CA) decreased CP release by 37 % as compared to the CK-CA, ascribed to the increased soil pH, Eh, and P adsorption capacity. The combined treatment (SB-IA: SBBulk-IA2 > SBNano-IA10) synergistically reduced CP release by 68 % in comparison with the CK-CA, due to the increase of adsorption through interactions of soil Fe/Al/Ca- and organic-P. Therefore, nano-sized biochar and long intermittent anoxic duration are recommended for reducing CP release from paddy soils.
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Affiliation(s)
- Junwei Jin
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Yunying Fang
- Australian Rivers Institute, School of Environment and Science, Griffith University, Nathan, Campus, Queensland 4111, Australia
| | - Chunlong Liu
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 130102, PR China
| | - Kamel Mohamed Eltohamy
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Shuang He
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Fayong Li
- College of Water Resources and Architectural Engineering, Tarim University, Xinjiang 843300, PR China
| | - Yuanyuan Lu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Xinqiang Liang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, PR China; Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 130102, PR China.
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