以直播栽培的早籼浙８６１９、早杂汕优４８－２、晚粳秀水１１和晚杂汕优１０号为试验对象，用１４Ｃ－葡萄糖作为示踪剂，分别在主茎叶片和分蘖叶片上涂抹标记，研究同化物在茎蘖和根系间的分配情况。结果表明，叶片吸收的１４Ｃ－葡萄糖向茎蘖的输送量大于根系；主茎上位叶输送到根系的同化物多于下位叶；上部节位分蘖的叶片输送到根系的同化物多于下部节位分蘖叶片；从不同标记部位输出的１４Ｃ－葡萄糖在茎蘖和根系间的分配率，随着标记时间的增长而增加，其增加速度根系大于茎蘖。 Early indica Zhezhan 8619, Zaosan Shanyou 48-2, late Japonica Xiushui 11 and late Chaoshanyouyou 10 were used as test objects, with 14C-glucose as tracer, respectively, in the main stem and tillering leaves Apply markers to study the distribution of assimilates between stem tillers and roots. The results showed that the amount of 14C-glucose absorbed by the leaf was more than that of the root system. The isomerism of the upper leaves of the main stem was more than that of the lower leaves. The leaves of the upper node tilted to the roots more than the lower ones The distribution of 14C-glucose from stems and tillers increased with the increase of labeling time. The root growth rate of 14C-glucose increased from root to stem and tiller.