大豆叶—粒关系的研究

CORRELATIVE PERFORMANCE BETWEEN LEAF AND SEED IN SOYBEANS

大豆顶节位叶面积与籽粒重之间的相关系数r=0.6741;单株各节位叶面积与籽粒重之间的相关系数为0.964、0.744、0.674(因品种而异);用剪叶处理使叶面积减少一半,单株籽粒重相应地下降47—60％。大豆群体上、中、下层分层剪叶,单株籽粒重下降4.3～21.2％不等(因品种和去叶层次而异)。粒叶比(g/m^2)与大豆单位面积产量呈显著正相关(r为0.49、0.45不等,因年份而异)。

The study results showed that the correlation coefficient of leaf area and seed weight at top node of soybean plants was 0.6741 (1% significant level), and the correlation coefficients of leaf area and seed weight per plant were 0. 964 (1 %signif icant level), 0. 744 and 0. 674 (5%significant level), various with different soybean varieties. Cutting 50% leaves could decrease seed weight per plant for 47% to 60%. Cutting leaves at upper, middle and lower layers of plant could result in the losses of seed weight from 4. 3% to 21. 1%, different varieties and different layers had different amount of loss. The ratiols of seed/leaf had positive significant correlations with soybean yields, the values Were not same for different years.