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以4个不同玉米品种为试材,通过50%遮光处理研究玉米品种间物质生产及产量形成对弱光环境响应的差异。结果表明,供试品种遮阴后,玉米产量、穗长、行数、行粒数和总粒数均呈明显的降低趋势,且粒期遮阴胁迫反应敏感。孕穗期遮阴,生育进程加快,干物质日积累量减少;粒期遮阴,结穗率降低。遮阴对品种先玉335和郑单958产量影响相对较小,表明先玉335和郑单958对弱光的适应能力较强;东单90对弱光反应敏感,产量下降幅度较大;北育288对粒期遮阴较孕穗期遮阴敏感。
Four different maize cultivars were used as materials to study the differences of maize production between different maize cultivars and their response to low light through 50% shading treatments. The results showed that after shading, the yield, the length of panicle, the number of rows, the number of rows and the total grain number of maize all decreased obviously, and the shading time was sensitive to grain stress. At booting stage shading, the process of fertility accelerated, dry matter daily accumulation reduced; grain shade, reducing the rate of node. Shade had a relatively small impact on the yield of cultivars Xian-yu 335 and Zheng -dan 958, indicating that Xianyu 335 and Zhengdan 958 had strong adaptability to low light. Dongdan 90 was sensitive to weak light and the yield decreased more greatly. 288 on the grain-shade more sensitive than booting shade.