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采用不同施氮水平研究玉米产量形成及叶片结构的试验结果表明：在０—４５０ｋｇ／ｈｍ２施氮水平范围内，３３０ｋｇ／ｈｍ２施氮量可获得最高产量，每ｈｍ２产量达４９３２ｋｇ；随施氮量增加．玉米叶片长、宽、厚都有显著或极显著增长，但单位长江内维管束数显著减少，栅栏组织层数无变化．因此认为．叶片长、宽、厚的增长主要是由于叶肉细胞，表皮细胞及维管束细胞因肥水关系增大所致．
The results of experiment on yield formation and leaf structure of maize at different N application rates showed that the highest yield was obtained at 330kg / hm2 N application rate and 4932kg hm2 at 0-450kg / hm2 nitrogen application rate. increase. The length, width and thickness of maize leaves had significant or extremely significant growth, but the number of vascular bundles in the Yangtze River decreased significantly and the number of palisade tissue layers did not change. So think. Leaf length, width, thickness of the growth is mainly due to mesophyll cells, epidermal cells and vascular bundles due to increased relationship between fertilizer and water.