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去年,昌图县各社、队凡是灌溉的春小麦,都获得了好收成。八面公社八面大队三队的春小麦灌4次水,平均亩产达到823斤。根据昌图县16年气象资料,春小麦的生育阶段正处在降雨少、蒸发量大的季节,蒸发量往往是降雨量的3倍左右。一般4～7月中旬平均降水量只有257毫米,而春小麦全生育期耗水量每亩为300立方米左右,相当于430毫米的降水量,与自然降水相差173毫米。所以,春小麦灌溉增产幅度较大。据去年八面公社八面大队
Last year, Changtu County’s various social groups, all irrigated spring wheat, have received a good harvest. Eight communes eight brigades of the three teams of spring wheat irrigation 4 times the water, the average yield reached 823 pounds. According to the 16-year meteorological data in Changtu County, the growth stage of spring wheat is in the season of low rainfall and large evaporation, and the evaporation is usually about 3 times of the rainfall. The average precipitation is only 257 millimeters from mid April to mid July, while the annual water consumption of spring wheat is about 300 cubic meters per mu, equivalent to 430 millimeters of precipitation, a difference of 173 millimeters from the natural precipitation. Therefore, spring wheat irrigation yield more. According to last year eight commune brigade