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为探索山西地区主推玉米品种获得高产、稳产的适宜种植密度,以郑单958为材料,对不同种植密度的叶面积指数(LAI)、叶片净光合速率和产量进行分析研究。结果表明:玉米叶片的净光合速率、单株产量随着种植密度的增加呈降低趋势,而LAI随着种植密度的增加呈升高趋势;当种植密度为82 500株/hm2时,玉米群体产量最高,为13 700.85kg/hm2。因此,82 500株/hm2为山西地区适宜的种植密度,可作为当地玉米高产选择适宜种植密度的参考。
In order to explore the suitable planting density for the main maize varieties in Shanxi Province to obtain high yield and stable yield, the leaf area index (LAI), net photosynthetic rate and yield of leaves under different planting densities were analyzed with Zhengdan 958. The results showed that the net photosynthetic rate and yield per plant of maize leaves decreased with the increase of planting density, while the LAI increased with the increase of planting density. When the planting density was 82 500 plants / hm2, the yield of maize The highest, 13 700.85kg / hm2. Therefore, 82 500 plants / hm2 is suitable for planting density in Shanxi Province, which can be used as a reference for selecting suitable planting density for high yield of local corn.