Menezes-Blackburn Daniel, Giles Courtney, Darch Tegan, George Timothy S, Blackwell Martin, Stutter Marc, Shand Charles, Lumsdon David, Cooper Patricia, Wendler Renate, Brown Lawrie, Almeida Danilo S, Wearing Catherine, Zhang Hao, Haygarth Philip M
1Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ UK.
2The James Hutton Institute, Dundee and Aberdeen, Scotland DD2 5DA and AB15 8QH UK.
Plant Soil. 2018;427(1):5-16. doi: 10.1007/s11104-017-3362-2. Epub 2017 Aug 1.
Phosphorus (P) fertilizer is usually applied in excess of plant requirement and accumulates in soils due to its strong adsorption, rapid precipitation and immobilisation into unavailable forms including organic moieties. As soils are complex and diverse chemical, biochemical and biological systems, strategies to access recalcitrant soil P are often inefficient, case specific and inconsistently applicable in different soils. Finding a near-universal or at least widely applicable solution to the inefficiency in agricultural P use by plants is an important unsolved problem that has been under investigation for more than half a century.
In this paper we critically review the strategies proposed for the remobilization of recalcitrant soil phosphorus for crops and pastures worldwide. We have additionally performed a meta-analysis of available soil P-NMR data to establish the potential agronomic value of different stored P forms in agricultural soils.
Soil inorganic P stocks accounted on average for 1006 ± 115 kg ha (57 ± 7%), while the monoester P pool accounted for 587 ± 32 kg ha (33 ± 2%), indicating the huge potential for the future agronomic use of the soil legacy P. New impact driven research is needed in order to create solutions for the sustainable management of soil P stocks.
磷肥的施用量通常超过植物的需求，由于其强烈的吸附作用、快速沉淀以及固定为包括有机部分在内的不可用形式，磷肥会在土壤中积累。由于土壤是复杂多样的化学、生物化学和生物系统，获取难溶性土壤磷的策略往往效率低下、因情况而异且在不同土壤中应用不一致。寻找一种近乎通用或至少广泛适用的解决方案来解决植物农业磷利用效率低下的问题，是一个半个多世纪以来一直在研究的重要未解决问题。
在本文中，我们批判性地回顾了为全球作物和牧场难溶性土壤磷的再利用所提出的策略。我们还对现有的土壤磷核磁共振数据进行了荟萃分析，以确定农业土壤中不同储存磷形态的潜在农学价值。
土壤无机磷储量平均为1006±115千克/公顷（57±7%），而单酯磷库为587±32千克/公顷（33±2%），这表明土壤残留磷未来的农学利用潜力巨大。需要开展新的以影响为导向的研究，以便为土壤磷储量的可持续管理创造解决方案。
