从水稻个体间同化物的分配动态论分蘖利用

On tiller utilization from the distribution trend of assimilation product in rice individuals

用１４￣Ｃ－葡萄糖作为同化物的供给源，研究早灿、早杂、晚粳和晚杂代表品种，在群体条件下，各个体之间同化物分配动态的结果，主茎输向分蘖的量与分蘖输向主茎的量之比，大致是２：１；在一株包含多种类型个体的植株中，其它非标记分可从标记主茎得到６￣９％的分配率。从标记分蘖得到３￣６％的分配率；无效分蘖的输出率大于有效分蘖，且有群体受光条件越好，其输出率越高的趋势。本文还根据其输出率的动态变化，讨论无效分蘖利弊和分蘖利用的问题。

With 14C-glucose as provided source of assimiation product, the early Indica. early Hy-brid and Iate Japonica as test variety, and under the population conditions、the distribution trend of assimilation product was studied in plant individuals.The results showed that the vegetation relation be-tween the main stem and tiller was of frequent occurrence;the ratio of exported amount from main stem to tiller to from tiller to main stem is about 2:1 in a plant which has many type individuals,the no-marked tiller might get about 6一9% of distribution from marked maul stcm,and gct about 3一6%from marked tiller. In th1s paper,the advantages and dlsadvantages of ineffective tiller and the tiller utiliztion also were discussed on the basis of the trend change of export ratio.