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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.
Two early-maturing soybean varieties (limited knot pod premature 7 and unlimited knot pod 14) were used in summer sowing in Beijing.The results of two years showed that the primordia of main stem of summer soybean were all within one month after sowing There were two turning points in the interval of flattening of adjacent leaves of main stem and the leaf flattening speed was fast in the flowering stage. There was a significant positive correlation between the number of pods kept and the dry weight of leaves per plant after the podding. The grain yield and flowering , The dry weight of the leaves at the drumming stage was related to the total weight of the shoots in the upper plantlets. The yield of summer soybean formed by the middle and upper nodes of the main stem.