农田土壤温度和水分空间变异研究

Study on Spatial Variability of Soil Temperature and Water in Field

以静海县良种场内面积为4400m^2的冬小麦田作为试验区，采用规格网采样，按照10m×10m设置格网，共设52个采样点，通过GPS手持机确定点的位置，利用土壤温湿度检测仪测定了各个采样点0～20、20～40cm二个不同深度土壤的含水量和温度，利用ARC／INFO的地统计分析模块绘制了试验区土壤温度和水分空间分布图，并分析了其垂直和水平方向的空间变异特征，可为确定冬灌的最佳灌溉时机和灌溉量提供科学依据。

Taking Jinghai County Seed Farm as experimental plot, in the winter wheat field（4400 m^2） sample points were set with 10 m× 10 m grids. Fifty two sample points were set altogether. All sample points were oriented by GPS receipt machine. Soil temperature and water content was measured by soil temperature and moisture meter at the depth of 0-20 cm and 20-40 cm on every point. We drew the spatial distribution map of soil temperature and water of the winter wheat field using geostatistical analyst model of ARC/INFO and also analyzed the spatial variability of soil temperature and water in vertical and horizontal direction in the research area. This can offer scientific evidence for the deciding of the exact time and quantity for winter irrigation.