摘要
利用经典统计学和地统计学相结合的方法，结合GIS技术，研究了该区域内土壤pH值、有机质、速效氮、速效磷和速效钾含量的空间分布特征．并采用kriging方法进行最优内插，绘制了河南省卢氏烟区土壤肥力各因子含量的空间分布图．结果表明，各肥力因子的变异系数为4．28％～46．95％、半方差分析表明，pH值和速效钾含量符合球状模型，而速效氮、速效磷和有机质含量则符合指数模型、土壤pH和速效磷由于C0／（C0＋C）分剐为0．09和0、2l，因而具有强烈的空间相关性．而其它3种土壤肥力因子由于C0／（C0＋C）为0．50～0．65、因而具有中等强度的空间相关性．
A total of 250 soil samples were taken from surface soil（0 -20） of Lushi tobacco planting fields, Henan Province in 2002 to examine the concentration of soil organic matter, pH,available N, available P and available K. Spatial variability of above mentioned was evaluated using geostatistics and geographic information system（GIS） analyses. The results showed that the variation index of five soil fertility factors are ranging from 4.28% to 46.95%. Analysis of the isotropic variogram indicated that the soil pH and available K semivariogram were well described with spherical models,while the available N , available P and organic semivariogram were well described with exponential model, with the distance of spatial dependence ranging from 10 290 to 14 490 m. Soil pH and available P were strongly spatially dependent with C0/（ C0 ＋ C）sill being 0.09,0.21 respectively in this given region,while other three soil fertility factors were moderately spatial dependent with C0/（ C0 ＋ C） sill ranging from 0.50 to 0.65. With the kriging analysis, the spatial distribution maps of soil properties in Lushi tobacco planting regions was drawn with arcview software.
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2008年第1期46-50,共5页
Journal of Henan Agricultural University
基金
国家烟草专卖局重点科技攻关项目(110200401021)
关键词
卢氏烟区
地统计学
土壤肥力因子
空间变异
Lushi tobacco planting region
geostatistics
soil fertility factor
spatial variability
