在不同种植密度下，高水肥地块紧凑型玉米掖单13号的最高产量超出普通型玉米长单32号8．57％，而于旱丘陵地块的掖单13号最高产量比长单32号降低12．69％，表明在水肥条件不一的地块，应根据地力选择合适株型的玉米品种。种植密度加大，影响玉米群体产量高低的构成因素主要是穗粒数。叶夹角与叶向值都会随密度加大而调节自身受光角度，调节幅度大小为穗下部叶大于穗上部叶，紧凑型玉米大于普通型玉米。 Under different planting densities, the highest yield of compact corn YEDA 13 with high water and fertilizer plots exceeded the 8.57% of CK corn 32 with ordinary corn, whereas YEDA 13 with the highest yield of YD 13 No. 12.69% lower, indicating that in different water and fertilizer plots, should be selected according to the appropriate plant type corn varieties. Increasing planting density, the main factors affecting the yield of corn population is the number of grains per spike. Leaf angle and leaf value will increase with the density to adjust their own light angle, adjust the size of the lower part of the spike leaves larger than the upper leaves, compact corn is larger than normal corn.