选用三种类型两系杂交稻组合，研究灌浆结实期茎、鞘贮藏碳水化合物转运活性及其影响因素。结果表明：茎、鞘高含量可溶性糖是转运活跃的特征；淀粉酶活性高有利淀粉降解转运；分枝酶（ Ｑ 酶） 可能影响淀粉的降解和转运效率；蔗糖合成酶（ Ｓ Ｓ） 、蔗糖磷酸合成酶（ Ｓ Ｐ Ｓ） 对蔗糖含量和转运有影响。 Three types of two-line hybrid rice combinations were selected to study the carbohydrate transport activities and their influencing factors in stems and sheaths during grain filling. The results showed that high content of soluble sugar in stems and sheaths was an active transporter, and amylase activity was favorable for starch degradation and transport. Branching enzyme (Q enzyme) might affect starch degradation and translocation efficiency; sucrose synthase (Ss), sucrose Phosphate synthase (S P S) has an effect on sucrose content and transport.