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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天次的干热风天气,最多一年出现10次,最长持续时间达8天之久(闻喜、1966),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,为了总结农田林网对小麦干热风的防护作用,多、快、好、省地发展农田林网建设,我们今年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、闻喜县东鲁、河津县小停等三个县的九个大队,进行了农田林网对小麦干热风防护作用的观测研究。
Dry and hot winds are a serious natural disaster of wheat. According to the preliminary statistics of 34 observation data of the weather stations in Xiaxian County, Hejin County and Wenxi County, there are an average of 5.1 days of dry and hot wind weather each year, with a maximum of 10 times a year. The longest duration of up to 8 days (Wen Xi, 1966), dry and hot wind wheat yield generally reduced 10-20%, severe cases up to 30%. Yuncheng area is the main producing area of wheat in our province. In order to summarize the protective effect of farmland forest net on wheat dry and hot wind, we should develop the farmland forest network in many aspects quickly, well and economically. By the beginning of June, nine battalions in three counties, Xiaodao Guodao, Miaocunzhongliu, Wenxi County Donglu and Hejin County Xiaoshang, carried out observation and research on the protective effect of farmland forest net on wheat dry and hot wind.