温室及大棚韭菜常遇到成片干枯死亡现象,严重影响了产量和收入。现将枯死原因及治疗方法介绍如下:(一)温度过高。温度过高是引起干尖的原因之一。韭菜适宜温度为5——25℃,若温度长期处于30℃以上环境中,就会成片干枯。另外,连阴雨后骤晴,高温后有冷气袭人,都会使叶尖枯黄。若外叶叶尖变茶褐色,而后逐 Leeks in greenhouses and greenhouses often experience dry-dead phenomena that seriously affect yields and incomes. Now the causes of death and treatment are as follows: (a) temperature is too high. Excessive temperature is one of the causes of dry tip. Leek appropriate temperature is 5-25 ℃, if the temperature is above 30 ℃ for a long time in the environment, it will become a dry film. In addition, even clear after the rainy season, high temperature after a cold air, will make the tip of the yellow. If the outer leaves tip dark brown, and then by