探讨辽西半干旱地区的农田供水状况．分析表明该区大田作物的耗水来源主要为生长期内大气降水和土壤储水，由于大气降水不足，特别是生长前期的严重缺水是该地区作物减产的一个重要原因，而且还经常出现伏旱和“秋吊”，大气降水占作物耗水量的７５．６％以上，而土壤供水量最高达作物耗水量的２４．４％，作物耗水量与生长期内大气降水呈直线关系． Discuss farmland water supply in semiarid areas of western Liaoning. The analysis shows that the main source of water consumption for field crops in this area is the atmospheric precipitation and soil water storage in the growing period. Due to the insufficient precipitation in the atmosphere, especially the severe water shortage in the early growth stage, it is one of the important reasons for crop yield reduction in this area, And “autumn hanging”, the atmospheric precipitation accounts for more than 75.6% of the total water consumption of crops, while the soil water supply reaches the maximum of 24.4% of the water consumption of crops, and the crop water consumption is in a linear relationship with the precipitation in the growth period.