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干热风是危害河西地区农业生产的严重灾害之一,特别对春小麦威胁很大。根据气象资料记载,干热风在武威、张掖、酒泉地区几乎每年出现。从张掖1956年到1975年的资料统计,二十年中共出现39次,平均每年二次。干热风危害严重的安西县,从1959年至1977年,19年中出现中强度干热风达33次;1974年6月1日到8月11日,连续出现6次干热风;1974年6月13日到7月31日,出现了6次,最长时间连续六天。这一段时间,正是小麦灌浆、乳熟阶段,由于高温、低湿,并伴随着强东风,加之土壤墒情不足,使小麦
Dry and hot winds are one of the serious disasters that endanger the agricultural production in Hexi area, especially for spring wheat. According to meteorological data records, dry hot air in Wuwei, Zhangye, Jiuquan appear almost every year. Statistics from Zhangye from 1956 to 1975 show that there were 39 appeals in the past 20 years, an average of twice a year. Anxi County, where the dry and hot winds are seriously endangered, produced 33 moderate-intensity dry and hot winds from 1959 to 1977 and 19 years. From June 1 to August 11, 1974, six consecutive dry and hot winds occurred. In June 1974 13 to July 31, appeared 6 times, the longest time for six consecutive days. This period of time, it is wheat grouting, milky stage, due to high temperature, low humidity, accompanied by a strong easterly, coupled with insufficient soil moisture, so that wheat