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对65个玉米杂交种棒三叶的叶长、叶宽、叶肉厚度、叶面积、叶绿素含量、叶向值、光合速率、叶片干重和比叶重等性状进行比较分析。结果表明:除比叶重和光合效率外,下位叶均超过上位叶和穗位叶,穗位叶又大于上位叶,呈现出形状上的金字塔结构。这种棒三叶的生长结构有利于透光,使光线较均匀地分布在棒三叶上,以提高玉米杂交种中部叶片的整体光合性能。穗位叶的比叶重和光合效率高于上位叶和下位叶,可能与穗位叶需提供玉米杂交种产量较多的光合产物有关。
Leaf length, leaf width, leaf thickness, leaf area, chlorophyll content, leaf orientation value, photosynthetic rate, leaf dry weight and specific leaf weight of 65 crossbred corn cultivars were compared. The results showed that in addition to the specific leaf weight and photosynthetic efficiency, the lower lobe than the upper lobe and spike leaf position, ear leaf position larger than the upper lobe, showing the shape of the pyramid structure. This rod-clover growth structure is conducive to light transmission, the light is more evenly distributed in the stick clover to improve the hybrid maize hybrids overall leaf photosynthetic properties. The specific leaf weight and photosynthetic efficiency of ear leaf were higher than those of upper leaf and lower leaf, which may be related to photosynthate with more yield of corn hybrid.