醴陵市耕地土壤有机质现状及其空间变异  

The Current Situation and the Spatial Variation of the Soil Organic Matter in Cultivated Land of Liling County

作　　者：余宇航[1] 周卫军[1] 包春红[1] 龙晓辉[1] 李江林[2] 张欢[1] 喻光孟[1] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128 [2]湖南省醴陵市农业局,412200

出　　处：《农业科技通讯》2010年第3期72-76,共5页

基　　金：醴陵市测土配方施肥与耕地地力评价项目

摘　　要：本文采用野外采样、室内分析、地统计、地理信息技术等方法,调查研究了醴陵市耕地土壤有机质现状和空间变异特征,研究表明:醴陵市耕地土壤有机质总体呈正态分布,土壤有机质平均含量为38.1g/kg;土壤有机质(SOM)含量的空间分布有自西南部向东北部逐渐增高的趋势;参照全国第二次土壤普查土壤有机质含量和各养分分级标准,醴陵市土壤有机质含量是较高的,总体处于较丰富水平,处于Ⅰ级(丰富)和Ⅱ级(较丰富)的面积占耕地总面积的82.83%。Based on field sampling, lab analysis, geostatistics and geographical information system techniques, the current situation and the spatial variation on soil organic matter （SOM） of the cultivated land was investigated in Liling County, Hunan Province. The research results showed that the cheracterstics of soil organic matter was a normal distribution and the average of the SOM are 38.1g/kg. The increasing trend from south-west to north-east was found on the spatial distribution of SOM. According to the standard of the SOM and Nutrition Classification conducted by the second national soil investigation, comparatively, the content of SOM was higher in cultivated land of Liling county. The area whoes content belongs to the level Ⅰ and level Ⅱ accounted for 82.83%.

关 键 词：土壤有机质 现状 空间变异 分级 

分 类 号：S158[农业科学—土壤学]