玉米空秆现象在我国各玉米产区发生普遍，危害重，已成为制约玉米产量提高的重要障碍因素之一。一般田块因空秆减产５～１０％，严重的可达２０％以上。１发生原因１·１营养物质供应不足。玉米吸肥力强，需肥量大。若营养物质不足，就会增加空秆率。如氮素供应不足，则造... Corn stalks are common and harmful in all maize producing areas in China. They have become one of the most important obstacles that restrict the yield increase of maize. General field due to empty stalk cut 5 to 10%, a serious up to 20% or more. 1 causes 1.1 inadequate supply of nutrients. Sufficient absorption of corn, a large amount of fertilizer needed. If nutrients are not enough, it will increase the empty stalk rate. If the supply of nitrogen is not enough, then make ...