期刊论文

中文

农业现代化研究

1000-0275

2012

33

4

502-507

10.3969/j.issn.1000-0275.2012.04.026

国家“十一·五”科技支撑计划项目“湘中南低山丘陵区红壤退化防治与生态农业技术集成和示范”（编号:2009BADC6B005-5）；

本校为第一机构

本文在分析土壤各单项肥力要素空间变异基础上,结合Fuzzy综合评价法和GIS技术研究了湘南紫色丘陵耕作区土壤肥力质量空间变异,为该区合理规划、开发土壤资源,科学培肥提供依据。研究结果表明:选取的8种肥力指标具有一定空间相关性,有机质、全氮、有效磷、速效磷值的空间异质比(块金值与基台值的比值)分别为100.0%、100.0%、87.9%和99.9%,属于空间弱相关,而pH、碱解氮、全磷、全钾的空间异质比分别为33.8%、63.3%、66.1%、73.7%,属中等空间相关;各单项肥力要素空间分布随土地利用变化呈不同的规律性变化。研究区土壤肥力质量偏低,为Ⅱ、Ⅲ和Ⅳ等,分别占整个区域面积的46.2%、19.6%和34.2%;不同土...

With the aim to provide reference for soil resource exploration and scientific fertilization, spatial variation of fertile indices was studied in purple hilly region of Southern Hunan Province by means of Fuzzy theory and GIS. The results showed that： there was some spatial dependence in 8 fertile indices. The nugget to sill ratio of organic matter, total N, available P were 100.0%, 100.0%, 87.9% and 99.9%, respectively, which indicated a weak spatial dependence. However, nugget to sill ratio ofpH, available N, total P and total K were 33.8%, ...