常熟县地处阳澄湖地区,地势地洼,土质粘重,渗透性差。麦作期常年平均雨量在500毫米左右,最多年份达650毫米以上,多集中在三麦生育后期。大量降雨往往造成地下水迅速上升,而渗入积贮土壤中的水分下渗极慢,形成严重湿害,使三麦生长发育 Changshu County is located in Yangcheng Lake area, the terrain depression, soil sticky, poor permeability. Wheat annual average annual rainfall of about 500 millimeters, up to a maximum of 650 millimeters, mostly concentrated in the late maturity of the three wheat. Large amounts of rainfall often result in the rapid increase of groundwater, while infiltration into the storage of soil water infiltration slow, the formation of severe wet injury, so that three wheat growth and development