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在7.5万株/hm~2密度下,以等行距(行距60 cm)种植为对照,研究扩行缩株(行距100 cm)种植下春玉米产量、物质积累及转运。结果表明,扩行缩株种植下两年2个品种春玉米产量及穗粒数均显著高于对照;农华101千粒重显著高于对照,伟科702与对照差异不显著。扩行缩株种植下两年2个品种生育后期干物质积累量及积累速率均显著高于对照;茎鞘转运量高于对照,叶片转运量低于对照。成熟期茎鞘和叶片干物质分配比例低于对照,子粒分配比例高于对照。
Under the density of 75 000 plants / hm ~ 2, the yield and material accumulation and translocation of spring maize were studied under the planting spacing of 60 cm. The results showed that the yield and grain number per spike of spring maize varieties were significantly higher than those of the control. The 1000-grain weight of Nonghua 101 was significantly higher than that of the control. The difference between Weicheng 702 and the control was not significant. The dry matter accumulation and accumulation rate of the two varieties in the two years after expansion and contraction were significantly higher than those of the control. The translocation of stem and sheath was higher than that of the control, and the leaf translocation was lower than that of the control. The proportion of dry matter in stem, sheath and leaf at maturity was lower than that in control, and the proportion of grain distribution was higher than that of control.