Molecular speciation and transformation of soil legacy phosphorus with and without long-term phosphorus fertilization: Insights from bulk and microprobe spectroscopy.
Molecular speciation and transformation of soil legacy phosphorus with and without long-term phosphorus fertilization: Insights from bulk and microprobe spectroscopy.
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长期施磷和不施磷的土壤残留磷的分子形态和转化：来自本体光谱和微探针光谱的见解
DOI：
10.1038/s41598-017-13498-7
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发表时间：
2017-11-10
影响因子：
4.6
通讯作者：
Ma Y
中科院分区：
文献类型：
--
作者：
Liu J;Yang J;Cade-Menun BJ;Hu Y;Li J;Peng C;Ma Y
土壤遗产磷是延缓全球磷危机的重要次生磷资源。为了充分利用这一磷储备，采用化学分步法、分子水平体谱法（P k -边x射线吸收近边，XANES；溶液31p核磁共振）和微探针谱法（µ- x射线荧光和µ-XANES）研究了施用和不施用磷肥27年黑土中遗留磷形态的变化。分异和P - bulk-XANES的结果一致表明，Ca2-P [Ca(H2PO4)2]在施磷肥或不施磷肥的土壤中起着稳定磷的储备作用。种植27年，无论施磷量如何，土壤中羟基磷灰石的消耗和铁结合磷的富集。在施磷肥和不施磷肥的土壤中，土壤有机磷（Po）的积累相似，可能是由于根渣的输入；施磷肥土壤中磷的积累以正磷酸盐的形式存在，高于不施磷肥土壤，表明土壤缺磷触发了土壤中磷的释放。这些结果通过展示遗留土壤磷的潜在作物有效性，为农业和环境可持续磷管理提供了重要信息，这可能会减少未来的磷肥施用。
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; solution31P nuclear magnetic resonance) and microprobe (µ-X-ray fluorescence and µ-XANES) spectroscopy. Results from both fractionation and P bulk-XANES concordantly indicated that Ca2-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 (Po), probably due to root residue inputs, occurred in both soils with and without P fertilization; the accumulated Powas present as orthophosphate diesters in soils with P fertilization more than in soils without P fertilization, suggesting that the release of labile Powas 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.
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影响因子：
4.6
作者：
Dou X;Kotov VN;Uchoa B
通讯作者：
Uchoa B
影响因子：
8.8
作者：
Audette, Yuki;O'Halloran, Ivan P.;Voroney, R. Paul
通讯作者：
Voroney, R. Paul
中国东部永安流域各乡镇农田磷收支、利用效率和遗留池的长期（1980-2010）变化
影响因子：
6.6
作者：
Chen, Dingjiang;Hu, Mingpeng;Dahlgren, Randy A.
通讯作者：
Dahlgren, Randy A.
影响因子：
13.2
作者：
Dodd, R. J.;Sharpley, A. N.
通讯作者：
Sharpley, A. N.
影响因子：
4.9
作者：
Han, XZ;Tang, C;Qiao, YF
通讯作者：
Qiao, YF