湖南农业大学学报（自然科学版）2012，Vol.38Issue(1)：96-101,6.DOI:10.3724/SP.J.1238.2012.00096
湘南丘岗红壤地区土壤肥力质量指标的空间变异特征
Spatial variability of soil fertility quality indices in red soil region
摘要
Abstract
Geographical information system(GIS)combined with geostatistics was applied to reveal the spatial variability of soil fertility quality indices including soil pH, organicmatter, available N, available P, available K, Total N, Total P and Total K in the topsoil(0-20 cm)of southeastern Hunan province. The results showed that theoretical semivariogram models of soil pH, available P, Total N and Total K were best described with an spherical model, whereas the organic matter, available N and available K were best fitted with a exponential model, Total P was best described with an gaussian model. The ratios of nugget to sill of available N and Total P were 13.6%, 19.0%, respectively, indicating there existed strong spatial correlation. The ratios of nugget to sill of pH, organicmatter, available P, available K, Total N and Total K were 28.7%, 29.9%, 54.7%, 53.1%, 55.6%, 73.0%, respectively, indicating a moderate spatial correlation. In the red soil region, the soil IFI (integrated fertility index) was closely related with parent material, based on which the fertility quality of the soil in north of Guanshanping village and south of Shulingsi village developed from limestone parent material belonged to the Ⅰ, Ⅱ and Ⅲ degree, which was high, the fertility quality of soil in Xingfuqiao village developed from slate parent material belonged to Ⅳ degree and the fertility quality of soil in south of Guanshanping village developed from quaternary red earth parent material belonged to Ⅴ degree.关键词
土壤肥力质量/地统计学/地理信息系统/空间变异/湘南Key words
soil fertility quality/ geostatistics/ geographical information system/ spatial variability/ Southeast of Hunan province分类
农业科技引用本文复制引用
刘杰,张杨珠,罗尊长,曾希柏,廖超林,黄运湘,周卫军..湘南丘岗红壤地区土壤肥力质量指标的空间变异特征[J].湖南农业大学学报（自然科学版）,2012,38(1):96-101,6.基金项目
国家"十一·五"科技支撑计划重点项目(2009BADC6B005) （2009BADC6B005）
国家"863计划"项目(2006AA10Z419) （2006AA10Z419）
