摘要
土地经济系数是农用地分等中重要的修正参数。本文以玉山县为例,应用地统计学的原理与方法,对土地经济系数的计算方法进行了探讨。通过对样点数据的半方差函数模型的分析,结果表明土地经济系数具有很强的空间相关性。在结构分析基础上,本文采用空间插值Kriging法,计算出每个分等单元的土地经济系数。经过样点验证,结果表明利用空间插值Kriging法计算出的土地经济系数与实测值的平均RMSE为0.88%,这表明Kriging空间插值法计算的土地经济系数比较精确,为农用地分等规律中经济系数的确定提供了新思路。
Land economic coefficient is an important corrective coeffcient in farmland classification. With Yushan County cited for case study, theories and methods of Geostatistics was applied to explore calculation motheds of land economic coefficient. Semivariance of data of the soil samples from the country was analyzed. Results indicated that spatial correlation existed between land economic coefficients. To calculate economic coefficient of each land unit, the Kriging method was adopted. Results of sampling verification indicated that it is feasible to use the Kriging method in calculating land economic coefficients, which opens up a train of thoughts for determining land economic coefficients in classification of farmland.
出处
《土壤》
CAS
CSCD
北大核心
2007年第4期652-657,共6页
Soils
