干热风是小麦生育后期的主要农业气象灾害。我省由于干热风的危害常使小麦籽粒秕瘦逼熟,造成不同程度的减产。因此,干热风对我省发展小麦生产,夺取稳产、高产、优质威胁很大。一、干热风的形成及其危害干热风的天气特征是低湿、高温并伴有一定强度风速的天气条件。我省春末夏初是其盛行季节,多出现在大陆热低压的影响下,或者冷高压南下时特定的天气形势之下。由于北方冷空气南下,从高空到地面为一致的下沉气流,受绝热增温的影 Dry and hot winds are the major agricultural meteorological disasters in the later stages of wheat growth. Due to the dangers of dry and hot wind in our province, the grain of wheat is frequently pressed and cooked, resulting in different degrees of yield reduction. Therefore, dry and hot wind on the development of wheat production in our province, to seize steady, high yield, high quality threat. First, the formation of hot and dry wind and its hazards Dry and hot wind weather is characterized by low humidity, high temperature and accompanied by a certain intensity of wind conditions. Spring and early summer early summer in our province is its prevalent season, mostly in the mainland under the influence of hot low pressure, or cold weather under the specific weather conditions south. Due to the north cold air south, from the sky to the ground for the same sinking airflow, by the impact of adiabatic warming