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DOI | 10.1088/1748-9326/aa69fc |
Reducing soil phosphorus fertility brings potential long-term environmental gains: A UK analysis | |
Withers, Paul J. A.1; Hodgkinson, Robin A.2; Rollett, Alison3; Dyer, Chris2; Dils, Rachael4; Collins, Adrian L.5; Bilsborrow, Paul E.6; Bailey, Geoff7; Sylvester-Bradley, Roger2 | |
2017-06-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:6 |
文章类型 | Review |
语种 | 英语 |
国家 | Wales; England |
英文摘要 | Soil phosphorus (P) fertility arising from historic P inputs is a major driver of P mobilisation in agricultural runoff and increases the risk of aquatic eutrophication. To determine the environmental benefit of lowering soil P fertility, a meta-analysis of the relationship between soil test P (measured as Olsen-P) and P concentrations in agricultural drainflow and surface runoff in mostly UK soils was undertaken in relation to current eutrophication control targets (30-35 mu g P L-1). At agronomic-optimum Olsen P (16-25 mg kg(-1)), concentrations of soluble reactive P (SRP), total dissolved P (TDP), total P (TP) and sediment-P (SS-P) in runoff were predicted by linear regression analysis to vary between 24 and 183 mu g L-1, 38 and 315 mu g L-1, 0.2 and 9.6 mg L-1, and 0.31 and 3.2 g kg(-1), respectively. Concentrations of SRP and TDP in runoff were much more sensitive to changes in Olsen-P than were TP and SS-P concentrations, which confirms that separate strategies are required for mitigating the mobilisation of dissolved and particulate P forms. As the main driver of eutrophication, SRP concentrations in runoff were reduced on average by 60 mg L-1 (71%) by lowering soil Olsen-P from optimum (25 mg kg(-1)) to 10 mg kg(-1). At Olsen-P concentrations below 12 mg kg(-1), dissolved hydrolysable P (largely organic) became the dominant form of soluble P transported. We concluded that maintaining agronomic-optimum Olsen-P could still pose a eutrophication risk, and that a greater research focus on reducing critical soil test P through innovative agro-engineering of soils, crops and fertilisers would give long-term benefits in reducing the endemic eutrophication risk arising from legacy soil P. Soil P testing should become compulsory in priority catchments suffering, or sensitive to, eutrophication to ensure soil P reserves are fully accounted for as part of good fertiliser and manure management. |
英文关键词 | agriculture eutrophication soil fertility phosphorus Olsen-P land runoff |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402550800001 |
WOS关键词 | CRITICAL SOURCE AREAS ; OVERLAND-FLOW ; HEADWATER CATCHMENTS ; SURFACE RUNOFF ; WATER-QUALITY ; MANAGEMENT STRATEGIES ; HYDROLOGICAL PATHWAYS ; GRAZED GRASSLAND ; OLSEN-P ; LOSSES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34329 |
专题 | 气候变化 |
作者单位 | 1.Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales; 2.ADAS UK Ltd, Cambridge CB23 4NN, England; 3.ADAS UK Ltd, Mansfield NG20 9PF, Notts, England; 4.Environm Agcy, Red Kite House,Howbery Pk, Wallingford OX10 8BD, Oxon, England; 5.Rothamsted Res, Sustainable Soils & Grassland Syst Dept, North Wyke EX20 2SB, Okehampton, England; 6.Newcastle Univ, Sch Agr Food & Rural Dev, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England; 7.ADAS UK Ltd, Starcross EX6 8PF, Devon, England |
推荐引用方式 GB/T 7714 | Withers, Paul J. A.,Hodgkinson, Robin A.,Rollett, Alison,et al. Reducing soil phosphorus fertility brings potential long-term environmental gains: A UK analysis[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(6). |
APA | Withers, Paul J. A..,Hodgkinson, Robin A..,Rollett, Alison.,Dyer, Chris.,Dils, Rachael.,...&Sylvester-Bradley, Roger.(2017).Reducing soil phosphorus fertility brings potential long-term environmental gains: A UK analysis.ENVIRONMENTAL RESEARCH LETTERS,12(6). |
MLA | Withers, Paul J. A.,et al."Reducing soil phosphorus fertility brings potential long-term environmental gains: A UK analysis".ENVIRONMENTAL RESEARCH LETTERS 12.6(2017). |
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