The role of non-crystalline Fe in the increase of SOC after long-term organic manure application to the red soil of southern China
文献类型： 外文期刊
第一作者： Zhang, J. C.
作者： Zhang, J. C.;Zhang, L.;Wang, P.;Huang, Q. W.;Yu, G. H.;Shen, Q. R.;Ran, W.;Li, D. C.
作者机构：
期刊名称：EUROPEAN JOURNAL OF SOIL SCIENCE （ 影响因子：4.949； 五年影响因子：4.626 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： Because of the important role of soil organic carbon (SOC) in nutrient cycling and global climate changes, there has been an interest in understanding how different fertilizer practices affect the SOC preservation and promotion. The results from this study showed that long-term application of manure (21years) could increase significantly the content of SOC, total nitrogen (N) and soil pH in the red soil of southern China. The chemical structure of SOC was characterized by using solid-state cross-polarization magic angle spinning (CPMAS) C-13 nuclear magnetic resonance (NMR) spectroscopy, and the aromatic C, ratio of alkyl C:O-alkyl C, aromaticity and hydrophobicity of mineral fertilizers N, P and K plus organic manure (NPKM) and organic manure (M) treatments were less than those of mineral fertilizer nitrogen (N) and mineral fertilizers N, P and K (NPK) treatments. Both poorly crystalline (Fe-o) and organically complexed (Fe-p) iron contents were influenced significantly (P<0.05) by different fertilizers, and it was observed that NPKM and M treatments increased the non-crystalline Fe (Fe-o-Fe-p) content. There was a significant (P<0.01) positive correlation between soil organic C and non-crystalline Fe in both the surface (0-20cm) and subsurface (20-40cm) soils. The results suggested that non-crystalline Fe played an important role in the increase of SOC by long-term application of organic manure (NPKM and M) in the red soil of southern China.
分类号： S15
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