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农学学报

农学学报 ›› 2011, Vol. 1 ›› Issue (xb1): 1-4.

所属专题： 玉米

• 农艺科学 生理生化 •    下一篇

晋南盆地夏播玉米种植密度对产量及其相关性状变异系数的影响

亢秀丽 靖 华 王裕智 刘建华 马爱平 崔欢虎   

  • 收稿日期:2011-03-01 修回日期:2011-03-06 出版日期:2011-03-25 发布日期:2011-03-25
  • 基金资助:

    科技部科技支撑计划项目;山西省科技厅科技专项

Effect of Soiling Density of Summer Maize on Yield and Related Traits Variation Coefficients in the Southern Basin of Shanxi

  • Received:2011-03-01 Revised:2011-03-06 Online:2011-03-25 Published:2011-03-25

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摘要：

为明确郑单958玉米品种在晋南盆地夏播的合理种植密度，充分发挥该品种的增产效能，在山西临汾采用随机区组设计方法研究了种植密度对产量及其相关性状变异系数的影响。结果表明：在伏雨正常年型条件下，籽粒产量、千粒重、穗长、穗粗和单穗重在不同种植密度间存在差异，而出粒率、穗行数和收获指数不存在差异；种植密度对相关性状的变异系数影响序列为单穗重＞籽粒产量＞千粒重＞穗长＞穗粗＞穗行数＞出粒率＞收获指数；穗长、穗粗和穗轴重对单穗重（籽粒）的贡献大小为：穗长＞穗粗＞穗轴重。晋南盆地夏播玉米增加种植密度可显著提高籽粒产量，其籽粒产量是随干物质积累的增加而协同提高，对收获指数性状影响较小。该项研究为晋南盆地夏播玉米增加种植密度提供了理论和技术支撑。

关键词: 作物, 作物, 产量性状, QTL定位

Abstract:

Abstract：In order to determine the rational soiling density of maize Zhengdan958, and to fully develop yield-increasing effect, we studied the effect of soiling density on yield and related traits variation coefficients in a randomized block design in Linfen, Shanxi Province. The results show that there are difference in grain yield, 1000- kernel weight, spike length, spike diameter and spike weight among different soiling densities in normal summer rainfall year, but kernel productivity, spike rows and harvest index don′t exist difference. The influence order of soiling density on related traits variation coefficients is spike weight > grain weight > 1000-kernel weight > spike length > spike diameter > spike rows > kernel productive > harvest index. The importance squencing of spike length, spike diameter and spike-stalk weight to spike-grain weight is spike length > spike diameter > spike-stalk weight. Increasing maize soiling density can remarkably enhance grain yield which has synergistic effect with dry matter calculation, and don′t exist significant effect on harvest index. This study provides theory and technology support upon maize soiling density increasing in southern basin of Shanxi.