大豆叶—粒关系的研究

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)。

CORRELATIVE PERFORMANCE BETWEEN LEAF AND SEED IN SOYBEANS

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.