超吨粮田中玉米植株性状与穗粒重的关系

Relationship Between the Plant Characteristics and Grain Weight of Maize in the Over Ton-grain Farmland

对粮、粮、豆立体多熟种植超吨粮田生产中，玉米地上１～４节茎粗、棒三叶、穗位以上叶面积、棒三叶和穗位以上叶质重、株型和穗型指数等１５个性状因子与穗粒数和穗粒重之间的关系进行了相关和回归分析。结果表明，这１５个性状均与其穗粒数和穗粒重呈极显著正相关。其中计算了第４节茎粗、穗位叶、穗位以上叶面积、穗位以上叶质重和穗型指数扩大单位量级后的增产效果。与此同时，通过逐步回归建立了穗粒数和穗粒重的逐步回归模式，其间二者共同性状因子是第４节茎粗、棒三叶面积、穗位以上叶质重和穗型指数，可视为二式的主导制约因子。

This paper probed into the related and regressional analyses on the relationships among the 15 factors and grain number and grain weight per ear.The 15 characteristic factors include stem-diameter of 1-4 node in maize stalk,third leaf under ear,leaf area over ear,leaf blade weight per unit(mg/cm)of third leaves below ear and above ear, the indexes of plant type and ear type etc.All these factors have significant positive correlations with grain number and grain weight per ear.