Leaching and Redistribution of Nutrients in Surface Layer of Red Soils in Southeast China

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Leaching and Redistribution of Nutrients in Surface Layer of Red Soils in Southeast China

机译：中国东南红壤表层养分的淋溶与再分配

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The leaching and redistribution of nutrients in the surface layer of 4 types of red soils in Southeast rnChina were studied with a lysimeter experiment under field conditions. Results showed that the leaching rnconcentrated in the rainy season (from April to June). Generally, the leaching of soil nutrients from the rnsurface layer of red soils was in the order of Ca ＞ Mg ＞ K ＞ NO3-N. In fertilization treatment, the total rnamount of soil nutrients leached out of the surface layer in a red soil derived from granite was the highest in rnall soils. The uptake by grass decreased the leaching of fertilizer ions in surface layer, particularly for NO3-N.rnSoil total N and exchangeable K, Ca and Mg in the surface layer decreased with leaching and grass uptake rnduring the 2 years without new fertilization of urea, Ca(H2PO4)2, KCl, CaCO3 and MgCO3. Ca moved rnfrom the application layer (0～5 cm) of fertilizer and accumulated in the 10～30 cm depth in the soils studied rnexcept that derived from Quaternary red clay. The deficiency of soil exchangeable K will become a serious rndegradation process facing the Southeast China.

机译：在田间条件下，通过蒸渗仪研究了东南部四种类型红壤表层养分的淋溶与再分配。结果表明，浸出集中在雨季（从四月到六月）。通常，从红壤的表层渗出的土壤养分的顺序为Ca＞ Mg＞ K＞ NO3-N。在施肥处理中，从花岗岩中生出的红色土壤中从表层中渗出的土壤养分的总含量在所有土壤中最高。草的吸收减少了表层中肥料离子的浸出，特别是对于NO3-N。 Ca（H2PO4）2，KCl，CaCO3和MgCO3。钙从肥料的施用层（0〜5 cm）中移出，并在10〜30 cm深度的土壤中积累，除了来源于第四纪红粘土的土壤。土壤可交换钾的缺乏将成为中国东南地区严重的退化过程。

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《土壤圈（英文版）》 |2000年第2期|135-142|共8页
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作者单位

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类
关键词
leaching; nutrients; red soils; redistribution; Southeast China;

机译：淋溶;养分;红壤;再分布;东南;

Leaching and Redistribution of Nutrients in Surface Layer of Red Soils in Southeast China

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