【摘要】 试验采用两个早熟大豆品种(有限结荚型早熟7号及无限结荚型车熟14号),在北京夏播.两年试验结果表明,夏大豆主茎上叶原基在播种后一个月内全部形成;主茎相邻叶片展平的间隔时间存在两个转折点,花期叶片展平速度快;结荚后单株保留的荚数与单株叶片干重有极显著正相关关系;籽粒产量与开花、鼓粒期植株叶片干重及单株地上部总于重密切相关;夏大豆靠主茎中、上部节位形成籽粒产量.更多还原

【Abstract】 Two early-maturing varieties(Early-maturing No.7 and No.14)were grown in the field in Beijing in the Summers of 1984 and 1985 with conventional practices.About a month after sowing all primordia of expanding leaves were formed.The total number of leaves on the main stem was variable.The first flower primordium at the leaf axil began to differentiate when a young leaf was formed.It was suggested that promoting growth of soybean plant before flowering can increase the number of flower in a plant.Foliage expandence of main stem had two turning points.The expandence of leaf blade in flowering period was faster than that in other periods.There was a significant positive coorrelation between pod number and the dry weight of living leaves of a plant.The amount of leaves after podding seemed to be an important factor limiting the number of pod.There was a marked correlation between seed yield and the dry weight of leaves or aerial parts at flowering as well as at pod-filling.更多还原