期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41598-017-13498-7
关键词
-
资金
- National Natural Science Foundation of China [41601313, U1632134]
- China Postdoctoral Science Foundation [2017M611067]
- Natural Sciences and Engineering Research Council of Canada
- National Research Council of Canada
- Canadian Institutes of Health Research
- Province of Saskatchewan
- Western Economic Diversification Canada
- University of Saskatchewan
- Agriculture & Agri-Food Canada
Soil legacy phosphorus (P) represents a substantial secondary P resource to postpone the global P crisis. To fully utilize this P reserve, the transformation of legacy P speciation in a black soil with and without P fertilization for 27 years was investigated by chemical fractionation, molecular-level bulk (P K-edge X-ray absorption near-edge, XANES; solution P-31 nuclear magnetic resonance) and microprobe (mu-X-ray fluorescence and mu-XANES) spectroscopy. Results from both fractionation and P bulk-XANES concordantly indicated that Ca-2-P [Ca(H2PO4)(2)] acts as a reserve of labile P in response to soils with or without P fertilization. Cropping for 27 years depleted hydroxyapatite while enriched iron-bound P in soils irrespective of P application. Similar accumulation of soil organic P (P-o), probably due to root residue inputs, occurred in both soils with and without P fertilization; the accumulated P-o was present as orthophosphate diesters in soils with P fertilization more than in soils without P fertilization, suggesting that the release of labile P-o was triggered by soil P deficits. These results provide vital information for agronomically and environmentally sustainable P management by demonstrating the potential crop availability of legacy soil P, which could reduce future P fertilization.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据