上海市规模经营农场的土壤养分与水稻产量空间变异特征

运用经典统计和地统计学结合的研究方法，探讨了规模化经营农场田块内的作物产量及土壤有效养分含量等空间变异特征。结果表明，土壤pH有较小变异和较强的空间结构性。作物产量变异较小而且是随机因素引起的没有明显空间结构性，和土壤养分含量及pH值等属性也没有明显的相关。有效磷、有效硫也表现为纯块金效应，全部变异由随机因素引起。其它观测项目均有不同程度的空间自相关，有效养分含量之间也有较为显著的相关性。

Study on spatial variability of soil nutrient and crop yield

Using classic statistics and geostatistics means,spatial variability characteristic of soil available nutrient and crop yield in field of scaling management farm and correlations between observing these items were studied.The result was as followed:soil pH has small variance and strong spatial structure.Variance of crop yield was also small and almost totally was produced by random factors and has not prominent correlation with soil pH and available nutrient.Available P and S also showed nugget effect total variance was produced by random factors.Other observing items all had spatial autocorrelation in different degree and there are prominent correlations between available nutrient content.