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大豆生殖生长时期,去荚植株的比叶重随生育进程增加的幅度较大,但叶片光合速率和全N含量(％)在去荚后短期内低于对照,随后尤其R_7和R_8期则显著高于对照。去荚延缓了叶片衰老,提高鼓粒末期叶片的光合速率和光呼吸速率。 荚果生长在一定时间内确能提高叶片光合速率,鼓粒末期叶片光合速率的明显降低是衰老的主要征状之一。
During the reproductive stage of soybean, the specific leaf weight of the de-podded plants increased more with the growth process, but the leaf photosynthetic rate and total N content (%) were lower than the control shortly after pod-plowing, especially in R_7 and R_8 Higher than the control. Deprivation delayed leaf senescence and increased photosynthetic rate and photorespiration rate at the end of drum. Pod growth in a certain period of time can indeed enhance the leaf photosynthetic rate, drum grain end of the leaves significantly reduced photosynthetic rate is one of the main signs of aging.