基于GIS技术的丽江金沙江流域烟区土壤肥力空间分析研究

 以云南省烟草公司丽江市公司的近两年烟田土壤采样点数据为数据基础，结合基本烟田分布、丽江市植烟适宜性区划模型、丽江市DEM等既有成果，确定土样数据的有效分析范围，以GIS技术手段结合地统计学理论，分析丽江金沙江流域烟区土壤肥力状况。研究选取有机质、碱解氮、速效钾、速效磷等4项指标展开统计分析。结果表明：有机质、碱解氮、速效钾、速效磷指标均有强变异性，指标数据呈正态分布或近似正态分布，基于半方差模型理论研究发现速效磷具有强空间相关性，有机质、碱解氮、速效钾具有中等空间相关性，选取普通克里格方法进行空间插值研究获得较好的效果。结果对指导丽江金沙江流域烟区现在烟草农业种植管理具有积极的指导意义。

The Spatial Analysis Research in Soil Fertility of Lijiang JinshajiangRiver Basin Based on GIS Technology

This research take the Yunnan Province Lijiang City tobacco company of nearly two years of tobacco field soil sampling data for the data base, combined with the basic tobacco field distribution, Lijiang tobacco planting regionalization model, Lijiang city DEM, determine soil sample data analysis of the effective range. Tobacco growing soil fertility status in Jinshajiang river basin of Lijiang City were analysised with the GIS technology and geostatistics theory.  The results showed that organic matter, available nitrogen, available potassium and available phosphorus  had the strong variability, data showed normal distribution. Based on semi variance model theory study found available phosphorus have strong spatial correlation, organic matter, nitrogen, available potassium with moderate spatial correlation, selection of general Krige method for study on spatial interpolation to obtain better effect. The results of tobacco field now in Jinshajiang river basin of Lijiang city tobacco farming management has positive significance.