山东省土壤水分自动站土壤水分常数评估

基于山东省120个土壤水分自动观测站所测定的土壤水文、物理特性测定值(简称土壤水分常数),采用ARCGIS技术、统计、成果参照对比等方法进行评估。结果表明,山东土壤水分自动观测站的土壤质地壤土类居多,达75%;土壤水文、物理特性测定土壤容重0.95~1.93 g/cm3、田间持水量14.1%~40.8%、凋萎湿度1.1%~33.0%。部分台站测定的水分常数存在偏差,尤其凋萎湿度的误差最大,田间持水量误差较小,土壤容重较为合适。

Assessment of Soil Moisture Constant of Soil Moisture Automatic Station in Shandong Province

Soil hydrological and physical properties of 120 soil moisture in Shandong province based on the determination of the automatic meteorological station(soil moisture constants for short) ARCGIS technology,statistics,comparison with the results were evaluated. The results showed that the Shandong soil moisture automatic observation station of soil texture soil mostly reached 75%; Soil physical properties determination of hydrology,soil bulk density value range 0.95~1.93 g/cm3,field capacity 14.1%~40.8%,wilting moisture 1.1%~33.0%. There was moisture constant bias for the determination of some stations,especially the error of wilting moisture was biggest. The field capacity error was smaller. The soil bulk density was more appropriate.