湖南省烟稻轮作区土壤养分的空间变异特征  

Spatial Variability of Nutrient Contents of Tobacco and Paddy Soil in Hunan Province

作　　者：黄新杰[1] 屠乃美[1] 李艳芳[1] 周娟[1] 易镇邪[1] 李宇威[1] 李淼[1] 罗富林[1] 

机构地区：[1]湖南农业大学农学院,长沙410128

出　　处：《中国烟草科学》2012年第3期13-16,共4页Chinese Tobacco Science

基　　金：国家自然科学基金项目(30971723)

摘　　要：为探明湖南烟稻轮作区土壤养分的空间分布，以便对土壤养分进行分区管理。采用GPS技术，在湖南省典型稻烟轮作区采集土样3255份，利用经典统计学和地统计学方法研究了烟稻轮作区土壤养分的总体特征和空间分布特征。结果表明，湖南省烟稻轮作区土壤养分表现为各向异性分布，具有中等程度的空间自相关性，其空间变异受结构性因素和随机性因素的共同影响；土壤养分的空间分布图显示，全氮含量丰富，有机质含量总体上处于中等水平，有机质缺乏（10-20eCkg）的面积仅为7．43％，有效磷和速效钾区域差异较大，有效磷缺乏（〈10mg／kg）面积占研究区的18．33％，速效钾缺乏（〈100mg／kg）面积占研究区的33．25％。The objective of this study was to explore the spatial distribution of soil nutrients, and to provide a solid foundation for management of nutrients. 3255 of tobacco and paddy soil samples were collected by using GPS teq：hnology in Hunan province. Descriptive analysis characteristics and spatial variation characteristics were studied. The results indicated that anisotropic structure of nutrient contents of tobacco and paddy soil varied evidently, soil organic content, total N, available P and available K were of moderate spatial autocorrelations, the anisotropic structure varied evidently, and their spatial variability was caused by structural factors and random factors. Spatial distribution maps showed that total N was high in the whole area, organic content was moderate, only 7.43% of the area was insufficient in organic matter, 18.33% of the area was deficient in available P. and 33.25% in available K.

关 键 词：烟草 土壤养分 空间变异 地统计学 

分 类 号：S158[农业科学—土壤学]