黑龙江省土壤水分分区与预报

Partitioning and Prediction of Soil Moisture in Heilongjiang Province

为客观分析黑龙江省土壤水分的特点,以有效利用水资源,实现农业增产,利用黑龙江省32个气象站1981～2009年3～10月降水量、蒸发量、日照时间等气象资料和3～10月逢8观测的土壤重量含水率资料,对黑龙江全省进行土壤分区和土壤水分预报。结果表明:土壤水分的散失与降水、日照、风速等气象条件的变化有较大关系。利用模糊聚类法,划分出黑龙江省5个土壤水分分区;并尝试用逐步回归法建立了春季土壤水分预报方程,经试验预报准确率较高。

For objectively analyzing characteristics of soil water in Heilongjiang province to efficient use water resource and realize agricultural production, Heilongjiang province soil partitioning and soil moisture prediction were conducted using 32 meteorological stations of Heilongjiang province from 1981 to 2009 between March and October precipitation,evaporation,sunshine time and other meteorological data and the gravimetric of the soil moisture data observed every 8th , 18th and 28th. The result showed that There was a larger relationship between soil moisture loss and change of meteorological conditions such as precipitation, sunshine and wind speed. Using fuzzy cluster analysis method, Heilongjiang province was divided into five soil moisture partition. It attempt to establish spring soil moisture prediction equation using stepwise regression method, the tested prediction accuracy was high.