不同行距对春玉米生育后期绿叶面积及活性的影响

试验以先玉335和军单8两玉米品种为试验材料、进行4个行距处理（分别为70、65、60和50cm），分别在生育后期测定了叶面积指数、光合速率、叶绿素含量和可溶性蛋白含量。结果表明:70和50cm行距处理在生育后期较其它处理提高了叶面积指数，保持了较大的绿叶面积,并且叶片叶绿素含量和可溶性蛋白含量均保持在较高水平，叶片衰老延缓，生理活性和光合速率较高。70、50cm行距较65、60cm行距在生育后期具有更大的光合生产潜力，有利于高产。 

Effect of Different Row Spacing on Canopy Structure of Maize and Light Intensity

Xianyu335 and Jundan8 as materials, four row spacing (70, 65, 60,and 55 cm) were used in this study. We measured leaf area index, photosynthetic rate, chlorophyll content and soluble protein content in late growth stage. The results showed that: compared with other treatments, LAI, physical activity and photosynthetic rate were higher, and chlorophyll content and soluble protein content were both maintained at high level in 50 and 70 cm row spacing. 70 and 50cm row spacing with a greater potential for photosynthetic production is conducive to high yield than the 65and 60 cm spacing.