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一、玉米倒伏的危害及特点玉米倒伏是指玉米在连续降雨或灌水的情况下,土壤含水量达到饱和或过饱和状态,玉米植株吸水量大,重量增加,在风的作用下发生倾斜、茎折或根倒的现象,分为茎倒、茎折、根倒。玉米倒伏不仅大大增加了玉米的收获难度而且对产量影响也很大,据查轻度倒伏的地块减产5%—20%,中度倒伏的地块减产25%—40%,严重倒伏的减产达50%以上,甚至绝收。从时间上看,玉米倒伏多发生在雨热同季的7—8月,6月以前,
First, the dangers and characteristics of corn lodging Corn lodging refers to the corn in the case of continuous rainfall or irrigation, soil moisture saturation or supersaturation, corn plants absorb water, weight increases, the role of the wind tilt, stem Folded or root down phenomenon, divided into stem down, stalk, root down. Corn lodging not only greatly increased the difficulty of harvest of corn but also on the yield is also very large, it was found light lodging plots cut 5% -20%, moderate lodging plots yield 25% -40%, severe lodging yield Up to 50% or more, even never received. From the time point of view, the lodging of corn occurred in rainy season with the July-August, before June,