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干热风是小麦的一种严重自然灾害,据夏县、河津、闻喜三县气象站34年次观测资料的初步统计,平均每年有5.1次的干热风天气,最多一年出现10次,最长持续时间达8天之久(闻喜,1966年),干热风一般使小麦减产10—20%,严重者可达30%以上。运城地区是我省小麦的主要产区,也是我省农田林网搞的较好的地区,像夏县等一些发展较早的地方,已经起到了明显的防护作用。1978年我们在干热风的危害季节(5月中旬到6月上旬)于夏县郭道、苗村,中留,闻喜的
Dry and hot winds are a serious natural disaster of wheat. According to the preliminary statistics of the observed data of 34 meteorological stations in Xiaxian, Hejin and Wenxi counties, the average annual dry and hot winds are 5.1 times a year, with a maximum of 10 times a year Long duration of up to 8 days (Wen Xi, 1966), dry and hot winds generally reduce wheat 10-20%, severe cases up to 30%. Yuncheng area is the main producing area of wheat in our province and also a better area for farming land in our province. Some places such as Xiaxian County which developed earlier have played a significant protective role. In 1978 we dry season in the hazardous season (mid-May to early June) in Xiaxian Guo Road, Miao Village, stay in, Wenxiu