为探究扩行缩株种植下春玉米干物质积累及转运特性。本文在7.5万株/hm2密度下,采用农华101和伟科702为试材,以等行距(行距60cm)种植为对照,研究扩行缩株(行距100cm)种植下春玉米产量、物质积累及转运。2年2个品种宽行种植下春玉米产量及穗粒数均显著高于对照,农华101增产幅度高于伟科702；千粒重农华101显著高于对照,伟科702与对照差异不显著。2年2个品种宽行种植下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,籽粒分配比例高于对照。扩行缩株种植下春玉米生育后期干物质积累优势明显,茎鞘转运量高,产量显著增加,其中农华101增产幅度高于伟科702。
英文摘要:
To explore the characteristics of dry matter accumulation and transport of spring maize under widening row spacing and shortening plant spacing. The Nonghua 101 and Weike 702 was grown on the density of 75 thousand plants /hm2, with equal row spacing (row spacing 60cm) planting as control, research for spring maize yield, dry matter accumulation and transport under widening row spacing and shortening plant spacing(row spacing of 100cm) planting。The yield and grain number per ear of both Nonghua 101 and Weike 702 were significantly higher than that of control group under wide row planting for 2 years,Huanong 101 the yield increase was higher than Weike702；the 1000-seed weight of 101 was significantly higher than that of the control,and no significant difference between the 702 and the control.Dry matter accumulation and accumulation rate in the late growth stage of two varieties were significantly higher than those in the control group under wide row planting for 2 years;The translocation of stem and sheath was higher than that of control,and leaf translocation was lower than that of control.The proportion of dry matter distribution of stem and sheath in mature stage was lower than that in control group,and the proportion of grain distribution was higher than that of control. The advantage of dry matter accumulation in late growth stage of spring maize was obvious under wide row planting, higher translocation of stem and sheath and production increased significantly,the Nonghua 101 increase in yield was higher than that in Weike 702.
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