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我省是全国春小麦主要产区之一,种植面积约占全国春小麦的40％,但我省雨量不匀,春旱严重,对春小麦产量影响极大。一般年分,小麦抽穗前大部份地区降雨仅150毫米,约合每亩降水100吨左右。而小麦在此期间的耗水量,按亩产500斤计算约为133.5吨,尚缺73.5吨。1975年以来,雨量更少。据10个县的气象资料分析,1975—1978年4年平均年降雨量
The province is one of the major spring wheat producing areas in the country. The planting area accounts for about 40% of the national spring wheat. However, the rainfall in our province is uneven and the spring drought is serious, which has a great impact on spring wheat yield. In general years, most areas of wheat before heading only 150 mm rainfall, about 100 tons of precipitation per acre or so. The water consumption of wheat during this period, calculated based on 500 kg per mu is about 133.5 tons, still missing 73.5 tons. Rainfall has been less since 1975. According to the meteorological data of 10 counties, the annual average rainfall in 1975-1978 is 4 years