怎样防御小麦干热风干热风是影响我省小麦产量的灾害性天气之一。一般是五年三、四遇，多发生在５月下旬。当气温达到３０℃以上，相对湿度大于或等于３０度，南风或西南风，风速每秒３米以上，连刮２—３天，就使小麦蒸腾量加剧，植株细胞失水，麦株青枯逼熟，千粒重降低... How to prevent wheat dry hot air hot air is one of the disastrous weather affecting wheat production in our province. Generally five years three or four, occurred in late May. When the temperature reaches above 30 ℃, the relative humidity is greater than or equal to 30 degrees, the southerly or southwest wind, the wind speed more than 3 meters per second, even scraping 2-3 days, make the wheat transpiration increased, plant cells dehydration, Dry forcing, grain weight reduction ...