不同密度下大豆叶部性状生长发育规律的研究

Studies on the Regulation of Growth and Development for Soybean Leaf Characters under Different Densities

通过对3种不同密度大豆群体的研究,探讨了不同密度下大豆叶部几种主要性状的生长发育规律。试验结果表明:大豆不同密度下的单株叶干重、单株叶柄重、单株叶面积及叶面积指数在不同的生育时期呈抛物线型变化,单株叶柄的平均长度呈S型曲线变化,比叶重的变化呈“升-降-升”的趋势;单株叶干重、单株叶柄重、单株叶面积及比叶重均随着群体密度的降低而增加,叶面积指数及单株叶柄的平均长度则随着密度的增加而增加。

Through study on the three kinds of soybean population under different densities, the experiment discussed the regulation of growth and development for the several main soybean leaf characters under different densities. The experiment results of test showed： leaf dry weight, leafstalk weight, leaf area, which all of individual plant, and leaves area index assumed a change of parabola curve under different soybean populations at various growth and development periods; the average leafstalk length of individual plant assumed S curve change ; specific leaf weight assumed ＂up-down-up＂ change. For individual plant, leaf dry weight, leafstalk weight, leaf area and specific leaf weight all increased with reducing of population density, but leaves area index and the average leafstalk length of individual plant increased with increasing of population density.