土壤水分空间变异性的研究

我国北方地区水资源紧缺,而且又是农业生产较为密集的地域,因此农业节水、农田水分转化及有效利用土壤水分成为精细农业急待解决的重要问题之一。土壤水分数据采集及空间变异性的研究对于如何充分发挥土壤水分的潜力、保护水资源、加强农田水分管理、灌溉排水设计、农田墒情预报等具有深远的理论指导意义和较强的地域性、实践性的应用价值。文章应用地理信息软件ArcGIS 9.0中的Spatial Analyst模块中反距离权重插值法、样条函数内插法和克立格插值法来绘制所测土壤水分特性的空间分布图,并为进一步研究土壤水分特性与提高作物产量间的关系提供理论基础。

Study on spatial variability of soil moisture

China is a country seriously suffering from the lack of water resource,especially the north of China(a dense area) where there are more agricultural productions than other places in China.Therefore,it′s important to solve some problems for precision agriculture,such as saving the water of agriculture,optimizing the water for cropland as well as making use of soil moisture effectively.The data collection of soil moisture and the study on spatial variability have far-reaching academic and guidance significance and regional and practical value for the realization of soil-moisture potential,protection of water resource,strengthening of farm soil moisture management,design of irrigation and drainage,monitoring of soil-moisture,etc.This paper applied IDW,Spline and Kriging in the spatial analyst of ArcGIS 9.0 to draw the distributon map of soil moisture and offered the theoretical foundation for study the connection of soil moisture and enhancing the yield.