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以紧凑型高产潜力玉米品种先玉335、郑单958和普通平展型玉米品种豫玉22、农大518为试验材料,对其群体叶面积指数、光合势、净同化率、干物质积累量及产量在全生育时期内的动态进行分析。结果表明,两个高产潜力玉米品种的群体叶面积指数、光合势和干物质积累总量均高于平展型玉米品种;群体光合生产率在不同生育时期表现不同,生育前期豫玉22和农大518的净同化率高于先玉335和郑单958,出苗90d后呈现相反趋势;产量与吐丝后干物质积累量呈现显著正相关,与各群体生理参数并非全部呈现显著差异。作物产量的形成过程是数量性状和质量性状的综合作用结果,最佳产量水平群体不是某项生理指标的突出表现,而是决定于各项生理指标的适度。
The compact and high yield potential maize varieties Xian Yu 335, Zheng Dan 958 and common flat maize varieties Yuyu 22 and Nongda 518 were used as experimental materials. Leaf area index, photosynthetic potential, net assimilation rate, dry matter accumulation and yield In the whole growth period of the dynamic analysis. The results showed that the leaf area index, photosynthetic potential and total dry matter accumulation of two maize varieties with high yield potential were higher than that of the maize variety. The photosynthetic productivity of the population showed different performance at different growth stages. Yu Yu 22 and Nongda 518 The net assimilation rate was higher than that of Xiangyu 335 and Zhengdan 958, which showed the opposite trend after 90 days of emergence. There was a significant positive correlation between yield and dry matter accumulation after silking, and not all the physiological parameters showed significant differences. The formation process of crop yield is the combined result of quantitative traits and quality traits. The optimum yield level group is not a prominent manifestation of a certain physiological index, but rather is determined by the appropriateness of various physiological indexes.