摘要
以新疆生产建设兵团农五师89团一连面积为73 hm2的条田为研究区域,运用地统计学与GIS相结合的方法对其土壤养分的空间变异特征展开研究。结果表明,碱解氮、有效磷和速效钾的C0/(C0+C)为25%～75%,具有中等的空间相关性。通过Kriging插值并依据养分的分级标准,所得的空间变异图能很好地反映农田土壤养分的空间变异特征和丰缺状况。几种养分要素中碱解氮、速效磷含量处于中低水平,速效钾养分含量较高,空间变异性不明显。
A farmland with 73hm^2 area was taken as study region in the 81th regiment of the 5th Agricultural Division, Xinjiang Autonomous Region, the characteristics of spatial variability of soil nutrients was studied by the method of geostatistics. The results showed that the ratios of available potassium, available phosphorus and available nitrogen were from 25% to 75%, and had medium spatial correlation. By using Kriging interpolation and according to the nutrients criteria, the levels and spatial variability of nutrients of soil were analyzed. In general the contents of available potassium were rich in the region, while available nitrogen, available phosphorus was at moderate and low level. The spatial variability of available N, available P and available K was not obvious.
出处
《湖北农业科学》
北大核心
2009年第7期1602-1605,1612,共5页
Hubei Agricultural Sciences
基金
国家科技支撑计划项目(2006BAD21B02-2)
石河子大学高层次人才科研启动资金专项(RCZX200722
RCZX200728)
关键词
土壤养分
空间变异
地统计学
克里格插值
soil nutrients
spatial variability
geostatistics
Kriging interpolation
