大豆早熟品种生长发育特点和产量形成规律的探讨——Ⅱ.大豆早熟品种产量形成的几项规律

STUDIES ON THE GROWTH, DEVELOPMENT AND YIELD OF EARLY-MATURING SOYBEANS Ⅱ. Several Rules of Yield Formation of Early-maturing Soybeans

根据3个大豆品种6个播期的多次取样资料,以Logistic方程分析了单株生物产量的积累,以对称“S”形曲线分析了单株荚重和单荚重的积累进程。大豆早熟品种单株生物产量积累,在出苗后50天左右达到最大值,始花至鼓粒盛期最快。早熟品种单株荚重的有效积累时间比晚熟品种短约10天,但单个荚重的平均增长速率比晚熟品种快约10mg/荚·日。

Three varieities of soybean ( Glycine max (L) Merr. ) differing in maturity were grown with 6 sowing dates in 1988. The growth analyses of biomass and pod with the Symmertrical 'S' Curve were conducted on individual plant.The plant biomass accumulation of soybeans could be well described with the Logistic equation. The rates of accumulation of early - maturing soybeans were faster than those of late -maturing soybeans. The rates of accumulation became faster as the date of planting was delayed. Late - maturing cultivars vesponsed more considerably by postponing of planting date than early - maturing soybeans. The growth of the pod weight per plant was described with the symmertri-cal 'S'curve, so was for the single pod weight. The time of maximum growth period of pod weight per plant of early-maturing soybeans were 10-15 days earlier than late-maturing soybeans. The rates of accumulation of single pod on early - maturing soybeans were higher than those on late - maturing soybeans. The effective growth periods of early - maturing soybeans were shorter than late-maturing soybeans.