历年来,我省在小麦生育后期,都有不同程度的干热风发生危害,对小麦产量影响很大。我县从1980—1982年连续三年大面积喷洒磷酸二氢钾,防御干热风,获得了明显的增产效果。磷酸二氢钾是一种高效速效性磷钾复合化肥,在小麦生育过程中的关键时期作为根外追肥进行叶面喷洒施用,能直接被小麦叶片及株体吸收,及时满足植株对磷钾的需要,从而促进光合作用的进行,加速干物质的积累,提高千粒重,增加产量。尤其在小麦生 Over the years, our province in the late growth of wheat, have varying degrees of dry hot wind hazards, a great impact on wheat yield. My county from 1980 to 1982 for three consecutive years spraying large areas of potassium dihydrogen phosphate, dry and hot wind defensive, access to a significant increase in production. Potassium dihydrogen phosphate is a high-efficiency and quick-acting phosphate-potassium compound fertilizer. It is sprayed on wheat leaves as foliar fertilizers during the critical period of wheat growth and can be directly absorbed by wheat leaves and plants to timely meet plant phosphorus and potassium Needs, thus promoting the progress of photosynthesis, accelerate the accumulation of dry matter, increase 1000-grain weight and increase yield. Especially in wheat students