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《Journal of Southwest University(Natural Science Edition)》 2009-01
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Spatial Distribution of Soil Nutrients in Soil Profile under Different Fertility of a Rubber Plantation

ZHANGWei1,2,LIN Qing-huo1,LUOWei1,JIANG Xian-jun1,21. Rubber Research Institute,South China Academy of Tropical Agricultural Sciences,Danzhou Hainan 571700,China;2. School of Resources and Environment,Southwest University,Chongqing 400716,China  
The growth and tapping quality of rubber trees are directly affected by soil fertility. Soil fertility has decreased dramatically in the 20 years since the stimulating-tapping system was practiced. In a study reported in this paper,a preliminary analysis was made of the spatial distribution of soil nutrients in different soil profiles at a rubber plantation. The result showed that organic matter,total N and available N declined with increasing depth,while P and K had no obvious regularity in the soil profile. The content of organic matter,total N and available N were remarkably higher in the high fertility soil profile. It is concluded that N is the main factor restricting rubber yield. The distribution of organic matter,total N and available N in the soil profile reflects soil potential fertility to some extent.
【Fund】: 中国热带农业科学院橡胶研究所2008年基本科研业务费资助项目(XJSYWFZX2008-24)
【CateGory Index】: S158
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