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The chemical nature of soil phosphorus in response to long-term fertilization practices: Implications for sustainable phosphorus management

文献类型： 外文期刊

作者： Liu, Jin 1 ; Han, Chaoqun 1 ; Zhao, Yuhang 2 ; Yang, Jianjun 2 ; Cade-Menun, Barbara J. 3 ; Hu, Yongfeng 4 ; Li, Jumei 5 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing 100094, Peoples R China

2.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

3.Agr & Agri Food Canada, Swift Current Res & Dev Ctr, Swift Current, SK S9H 3X2, Canada

4.Univ Saskatchewan, Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

6.Xinjiang Acad Agr Sci, Inst Soil Fertilizer & Agr Water Saving, Urumqi 830091, Peoples R China

7.Macau Univ Sci & Technol, Macau Environm Res Inst, Macau 999078, Peoples R China

关键词： Soil; Manure; Molecularspeciation; SolutionP-NMR; P-XANES; Newberyite

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：9.297； 五年影响因子：9.444 ）

ISSN： 0959-6526

年卷期： 2020 年 272 卷

页码：

收录情况： SCI

摘要： Developing sustainable phosphorus (P) management strategies is a worldwide challenge in the face of growing food demand, dwindling rock phosphate resources, and deteriorating environmental quality. This requires improved knowledge on the effect of current fertilization practices on long-term P accumulation, bioavailability and mobility, which are functions of the chemical nature of soil P. Using state-of-the-art techniques such as solution P-31-NMR and P K-edge XANES spectroscopy, combined with sequential fractionation, this study investigated the chemical speciation and transformation of P in soils under three fertilization treatments (no fertilization, CK; chemical nitrogen (N), P and potassium (K) fertilization, NPK; and partial substitution of chemical fertilizer with sheep manure, NPKM) from a long-term experiment in China initiated in 1990. Compared to the NPK soil, total P and organic P (P-o) concentrations were lower in the NPKM soil in the sampling years of 2000 and 2015, suggesting reduced P accumulation under the NPKM treatment. The NaHCO3-extracted P, considered the most readily plant-available P fraction, significantly increased in the NPKM soil relative to the NPK soil in 2000. The P-XANES results revealed the formation of the magnesium (Mg)-P compound newberyite, which probably contributed to soil P availability with NPKM application. Moreover, P-NMR analysis showed higher deoxyribonucleic acid content and ratio of orthophosphate diesters to monoesters in the NPKM soil relative to the NPK soil, which implied the stronger soil P-o lability with NPKM fertilization. This study provides new insights on the significant role of NPKM treatment in optimizing soil P fertilization regimes, which benefits sustainable crop production. Crown Copyright (C) 2020 Published by Elsevier Ltd. All rights reserved.

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