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应用 1 4 C示踪活体动力学和离体测量方法 ,探讨小麦旗叶碳同化产物在不同土壤水分条件下的运输分配情况和化学调控的影响。结果表明 :灌浆期旗叶同化物活跃输出时间为饲喂后 1 .5 d内 ,1 4 C同化物输出百分率随饲喂后时间的变化动态 ,在灌浆前期可拟合为对数方程 ,而灌浆后期可拟合为直线方程。土壤欠水处理加快了灌浆后期同化物输出 ,影响同化物在植株各部位的分配比例 ,其中向根系的分配明显增加。系统化控缓和了欠水的影响 ,显著缩短了1 4 C同化物输出半时 ,促进了同化物输出
The 14C tracer in vivo kinetics and in vitro measurements were used to investigate the effects of chemical regulation on the transport and distribution of flag leaf carbon assimilation products under different soil moisture conditions. The results showed that the active export time of flag leaf assimilates in grain filling stage was 1.54 days after inoculation, and the output of 1 4 C assimilates changed with the time after feeding. The logarithmic equation could be fit in the early filling stage Filling stage can be fitted as a straight line equation. Soil under water treatment accelerates the output of assimilates in the late filling stage and affects the distribution proportion of assimilates in different parts of the plant, and the distribution to roots is obviously increased. Systematic control moderated the effects of water shortages, significantly shortened the output of 1 4 C assimilates by half, and promoted assimilate output