对豫中烤烟种植区土壤颗粒空间变异性特征的分析表明:＞0.1 mm和0.01 ～0.05 mm粒级的都符合高斯模型,空间自相关距离分别为155700和763500 m;0.05 ～0.1 mm粒级的符合指数模型,空间自相关距离为370500 m；0.001～0.01mm粒级的符合球形模型,空间自相关距离为10600 m.豫中植烟区土壤表层0.01～0.05 mm和0.001 ～0.01 mm粒级的颗粒含量的空间变异主要受成土母质等结构性因素的影响,而土壤表层＜0.001 mm粒级颗粒含量的空间变异主要受随机因素的影响.土壤颗粒0.001 ～0.01 mm粒级的主要分布在研究区的北部和西南部一带,0.05～0.1 mm粒级的土壤颗粒主要分布在研究区的东部,＞0.1 mm粒级的土壤颗粒主要分布在研究区的西部一带.%The spatial variability of soil granule composition in tobacco - planting fields in middle Henan province was studied. The results showed that the soil granules ( >0.1 mm and 0.01 ～0.05 mm in diameter) were well described with Gaussian model, with the spatial autocorrelation range of 155700 m and 763500 m respectively; the soil granules (0.05 ～0. 1 mm) were well described with Exponential model, with the spatial autocorrelation range of 370500 m, the soil granules (0.001 ～0.01 mm) were well described with Spherical model, with the spatial autocorrelation range of 10600 m. The spatial variability of the content of surface soil granules (0.01 ～0.05 mm and 0.001 ～0.01 mm) in tobacco felds was mainly affected by structural factors such as soil parent material, while that of surface soil granules ( 0.1 mm ) was mainly in the western part.
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