{"title":"将土壤磷吸附能力与农艺指数相结合,提高农业中磷的可持续利用率","authors":"Sifan Yang, Blánaid White, Fiona Regan, Nigel Kent, Rebecca L. Hall, Karen Daly","doi":"10.1007/s11368-024-03900-z","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Phosphorus (P) sorption processes in soils can influence P plant-availability and influence ‘build-up’ and ‘draw-down’ P cycles. Current fertiliser recommendations do not take these processes into account. This study aimed to integrate soil P sorption behaviour and P agronomic-indices to strengthen P management recommendations.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Mineral soil covering 35,716-km<sup>2</sup> of Ireland was characterised by P status (Morgan’s P and Mehlich-3 P), and Langmuir sorption parameters of P sorption maximum capacity (Smax, mg·kg<sup>−1</sup>) and binding energy (k, L·mg<sup>−1</sup>).</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Segmented regression between Smax and M3-Al (<i>R</i><sup><i>2</i></sup> = 0.49) identified a significant change-point at Smax = 450.03 mg·kg<sup>−1</sup>, at which soils can be placed into ‘low’ (SL<sub>M3-Al</sub>) and ‘high’ (SH<sub>M3-Al</sub>) P sorbing classes. Sorption parameters in SL<sub>M3-Al</sub> did not change with soil P status; however, in high P sorbing soils, sorption parameters significantly correlated with P status. High sorbing soils that are P-deficient (Index 1 and 2) will ‘fix’ P and take longer to build-up plant available P to a value for agronomic production (Index 3). Low P sorbing soils at high P status (Index 4) will decline to Index 3 at faster rates than high P sorbing soils. These soils (SL<sub>M3-Al</sub>) are at higher risk of soluble P losses to water because of lower binding energies.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Efficient P fertiliser use can be more effective if soils are delineated into ‘low’ and ‘high’ sorbing soils coupled with soil P status. By integrating P sorption capacities with agronomic soil P indices, fertiliser advice and water quality measures can be targeted and more effective.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Integrating soil phosphorus sorption capacity with agronomic indices to improve sustainable P use in agriculture\",\"authors\":\"Sifan Yang, Blánaid White, Fiona Regan, Nigel Kent, Rebecca L. Hall, Karen Daly\",\"doi\":\"10.1007/s11368-024-03900-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Purpose</h3><p>Phosphorus (P) sorption processes in soils can influence P plant-availability and influence ‘build-up’ and ‘draw-down’ P cycles. Current fertiliser recommendations do not take these processes into account. This study aimed to integrate soil P sorption behaviour and P agronomic-indices to strengthen P management recommendations.</p><h3 data-test=\\\"abstract-sub-heading\\\">Methods</h3><p>Mineral soil covering 35,716-km<sup>2</sup> of Ireland was characterised by P status (Morgan’s P and Mehlich-3 P), and Langmuir sorption parameters of P sorption maximum capacity (Smax, mg·kg<sup>−1</sup>) and binding energy (k, L·mg<sup>−1</sup>).</p><h3 data-test=\\\"abstract-sub-heading\\\">Results</h3><p>Segmented regression between Smax and M3-Al (<i>R</i><sup><i>2</i></sup> = 0.49) identified a significant change-point at Smax = 450.03 mg·kg<sup>−1</sup>, at which soils can be placed into ‘low’ (SL<sub>M3-Al</sub>) and ‘high’ (SH<sub>M3-Al</sub>) P sorbing classes. Sorption parameters in SL<sub>M3-Al</sub> did not change with soil P status; however, in high P sorbing soils, sorption parameters significantly correlated with P status. High sorbing soils that are P-deficient (Index 1 and 2) will ‘fix’ P and take longer to build-up plant available P to a value for agronomic production (Index 3). Low P sorbing soils at high P status (Index 4) will decline to Index 3 at faster rates than high P sorbing soils. These soils (SL<sub>M3-Al</sub>) are at higher risk of soluble P losses to water because of lower binding energies.</p><h3 data-test=\\\"abstract-sub-heading\\\">Conclusions</h3><p>Efficient P fertiliser use can be more effective if soils are delineated into ‘low’ and ‘high’ sorbing soils coupled with soil P status. 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引用次数: 0
摘要
目的 土壤中的磷(P)吸附过程会影响植物对磷的利用率,并影响磷的 "积累 "和 "吸收 "循环。目前的施肥建议并未考虑这些过程。本研究旨在整合土壤对 P 的吸附行为和 P 的农艺指数,以加强对 P 的管理建议。方法根据 P 状态(摩根 P 和 Mehlich-3 P)、Langmuir 吸附参数 P 吸附最大容量(Smax,mg-kg-1)和结合能(k,L-mg-1)对爱尔兰 35,716 平方公里的矿质土壤进行表征。结果 Smax 与 M3-Al 之间的分段回归(R2 = 0.49)在 Smax = 450.03 mg-kg-1 处发现了一个显著的变化点,在此点上可将土壤划分为 "低"(SLM3-Al)和 "高"(SHM3-Al)磷吸附等级。SLM3-Al 中的吸附参数不随土壤钾状况的变化而变化;但在高钾吸附土壤中,吸附参数与钾状况显著相关。缺钾(指数 1 和 2)的高吸钾土壤会 "固定 "钾,需要更长的时间才能将植物可用钾积累到农艺生产所需的值(指数 3)。高吸钾状态下的低吸钾土壤(指数 4)会比高吸钾土壤以更快的速度下降到指数 3。这些土壤(SLM3-Al)由于结合能较低,可溶性钾流失到水中的风险较高。结论如果将土壤划分为 "低 "和 "高 "吸附性土壤,并结合土壤钾状况,就能更有效地使用钾肥。通过将钾吸附能力与农艺学土壤钾指数相结合,可以有针对性地提供更有效的施肥建议和水质措施。
Integrating soil phosphorus sorption capacity with agronomic indices to improve sustainable P use in agriculture
Purpose
Phosphorus (P) sorption processes in soils can influence P plant-availability and influence ‘build-up’ and ‘draw-down’ P cycles. Current fertiliser recommendations do not take these processes into account. This study aimed to integrate soil P sorption behaviour and P agronomic-indices to strengthen P management recommendations.
Methods
Mineral soil covering 35,716-km2 of Ireland was characterised by P status (Morgan’s P and Mehlich-3 P), and Langmuir sorption parameters of P sorption maximum capacity (Smax, mg·kg−1) and binding energy (k, L·mg−1).
Results
Segmented regression between Smax and M3-Al (R2 = 0.49) identified a significant change-point at Smax = 450.03 mg·kg−1, at which soils can be placed into ‘low’ (SLM3-Al) and ‘high’ (SHM3-Al) P sorbing classes. Sorption parameters in SLM3-Al did not change with soil P status; however, in high P sorbing soils, sorption parameters significantly correlated with P status. High sorbing soils that are P-deficient (Index 1 and 2) will ‘fix’ P and take longer to build-up plant available P to a value for agronomic production (Index 3). Low P sorbing soils at high P status (Index 4) will decline to Index 3 at faster rates than high P sorbing soils. These soils (SLM3-Al) are at higher risk of soluble P losses to water because of lower binding energies.
Conclusions
Efficient P fertiliser use can be more effective if soils are delineated into ‘low’ and ‘high’ sorbing soils coupled with soil P status. By integrating P sorption capacities with agronomic soil P indices, fertiliser advice and water quality measures can be targeted and more effective.
期刊介绍:
The Journal of Soils and Sediments (JSS) is devoted to soils and sediments; it deals with contaminated, intact and disturbed soils and sediments. JSS explores both the common aspects and the differences between these two environmental compartments. Inter-linkages at the catchment scale and with the Earth’s system (inter-compartment) are an important topic in JSS. The range of research coverage includes the effects of disturbances and contamination; research, strategies and technologies for prediction, prevention, and protection; identification and characterization; treatment, remediation and reuse; risk assessment and management; creation and implementation of quality standards; international regulation and legislation.