【摘要】 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．更多还原

【Abstract】 Effect of different nitrogen levels(0,150.300,450kg per ha.)yield formation and leaf structure of POP corn were studied in this paper. The results showed the highest output, reaching 4932 kg per ha. was obtained at 330 kg nitrogen level per ha. With the increase of nitrogen level, leaf length,width and thickness increased significantly,but fibrovascular bundle density decreased significantly, fence tissue did not change.Sowe thought that the increase of leaf length, width and thickness resulted from the increase of pulp cell,cuticular cell and fibrovasular bundle number affected by fertilizer and water etc,更多还原