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一是防早衰玉米早衰是指玉米生育后期即灌浆期,玉米穗粒以下的叶片枯黄,茎秆干枯,过早地丧失了光合作用能力,甚至倒伏,其结果导致玉米子粒空秕,百粒重下降,造成严重减产。玉米生长期间必然要消耗大量养分和水分,而生育中水分过多,会造成土壤缺氧,这时根系活动减弱,吸水困难,但叶片蒸腾不减,尤其是晴天,叶片消耗水分更多,易造成生理代谢失调,出现叶片卷曲,生长缓慢,若此时缺肥,就会出现植株矮瘦,甚至枯萎死亡。防治方法:若多雨地区,应做好排涝防渍工作;若出现早衰趋势或叶片落黄,应在开花初期喷施磷肥,以延长叶片绿色期,增加果穗重量。
Premature premature failure of corn premature aging refers to the late growth stage of corn that is filling stage, below the ear of corn grain yellow leaves, stems dry, premature loss of photosynthesis ability, or even lodging, the results lead to maize kuimian empty, 100 weight Decline, causing serious cuts. Corn will inevitably consume a large amount of nutrients and water during growth, and excessive water in the birth, will cause soil hypoxia, then weaken the root activity, water absorption, but not diminish the leaf transpiration, especially sunny, leaf water consumption more easily Physiological metabolic disorders caused by the emergence of curly leaves, slow growth, if lack of fertilizer at this time, there will be short plants, and even withered death. Prevention and treatment methods: If the rainy areas, should be well waterlogging stains work; if there is a trend of premature aging or leaves falling yellow, should be sprayed early in the flowering of phosphate fertilizer to extend the leaf green period and increase ear weight.