黄淮平原不同土壤类型不同作物的土壤墒情指标研究

利用多年多点高密度、大样本,不同土壤类型、不同作物和不同发育阶段10~50 cm土壤测墒资料及多年冬小麦、夏玉米生理观测资料,用建立回归方程、最优分割法、点图法、保证率法、平均值法等多种统计方法集成,并考虑土壤水分对作物生理的影响,得出6种土壤类型冬小麦和夏玉米2种作物4个主要发育阶段的重旱、轻旱、适宜、偏湿4个土壤墒情等级指标。把确定的指标,输入到卫星遥感墒情监测系统的指标模板中,可提供更接近实际、宏观的遥感土壤墒情分布情况和作物受旱面积。

Research on Indexes of Remote Sensing Soil Moisture for Different Soil Types and Crops

Based on the observed crop physiological data and soil moisture data from 10 cm to 50 cm depths for different crops and soil types at different growth phases during two years,using such statistical methods as regression equation,point-chart method,assure rate method,and average method,the graded indexes of winter wheat and summer corn for six types of soil at four different growing stages are obtained.The indexes are divided into four grades: severe drought,slight drought,suitable and slight wet.The indexes were put into the index template of the satellite remote sensing system to provide the realistic soil moisture distribution and the drought-attacked area for the governments of various levels.