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小麦开花后,植株的生长中心开始转移,各器官的同化物都陆续往籽粒集中.这时,同化物集中的强度和数量对产量有很大影响.由于小麦自开花到成熟经历的时间较长,地上部各器官的光合能力、持续时间以及同化物的输出强度都在相继变化.因此,每种器官运往籽粒的同化物在数量上和时间上必然会有差异,其作用也会随产量形成的阶段不同而异.关于叶片和茎鞘在这一时期对产量的作用及其变化已受到普遍重视,并且曾有大量报告;而麦穗是继旗叶以后出现的绿色器官,位于植株顶端,穗颖又紧靠籽粒,其同化物对产量形成的影响,在生产上也值得重视.为此,我们于1980和1982两年在本校农场用烫颈、套穗等方法,对这一问题作了初步探讨.
After the flowering of wheat, the growth centers of the plants begin to shift, and the assimilates of various organs are gradually concentrated in the grains. At this time, the intensity and quantity of the assimilates concentrate greatly on the yield. Since wheat takes a long time to blossom from maturity , Photosynthetic capacity, duration and assimilate output intensity of various organs in shoots are changing one after another, so the amount of assimilates transported to grain by each organism will inevitably vary in quantity and time, and its effect will also be formed with the yield Of the different stages of leaf and stem and sheath in this period on the role of production and its changes have been generally valued, and there have been a large number of reports; and wheat ears is followed by the emergence of green organs, located at the top of the plant, Spike Ying and close to the grain, the impact of its assimilate on the formation of yield, also worthy of attention in the production.To this end, we in 1980 and 1982 in the school farm with hot neck, sets of spikes and other methods, on this issue A preliminary discussion.