发生倒伏的玉米植株和群体,不论制造营养物质的“源”如何充足,光合产物多多,积累营养物质的“库” 的容量如何大,由于输送营养物质的“流”被截断,而导致“源”、“库”不协调,可溶性物质不能入“库”,造成大量空秕粒,千粒重下降,经济产量锐减.所以,玉米发生倒伏,严重影响产量,而且给收获带来困难.1988年我省玉米生产田倒伏较普遍,特别是生育后期的茎倒伏和根倒伏,使不少地方的玉米丰产不丰收,产量大幅度降低. The lodging of corn plants and populations, regardless of how abundant “sources” of nutrients are made, the abundance of photosynthates, the capacity of the “pool” of nutrients to accumulate, and the “flow” of nutrients being cut off, “,” Library “uncoordinated, soluble substances can not enter the” library ", resulting in a large number of empty tablets, grain weight decreased, economic output dropped sharply. Therefore, the occurrence of lodging corn, seriously affecting the yield, but also to harvest difficulties. The provincial maize field lodging is more common, especially in late growth stage of stem lodging and root lodging, so that many areas of high yield bumper corn is not yield significantly reduced.