头季稻剑叶同化产物分配与再生稻产量的关系

以4个品种(组合)为材料,研究了头季稻剑叶同化产物的分配与再生稻产量的相关关系.结果表明:(1)约70%～75%的剑叶14C同化产物进入到了穗部,25%～30%残留在剑叶和茎鞘中;(2)约65%～80%的剑叶同化产物分配在倒一和倒二节间;(3)同化产物在穗部的分配比例与再生稻产量及所有的产量构成因子均呈负相关,同化产物在茎鞘、剑叶及其他叶片的分配比例与再生稻产量及所有的产量构成因子均呈正相关;(4)各节间的同化产物分配比例与再生稻相应节位产量呈显著正相关关系.

Relationship between distribution of photosynthesis production of flag leaf of main crop and yield of ratooning rice

Four rice combinations were used to study the relationship between distribution of 14C photosynthesis production of flag leaf of main crop and yield of ratooning rice.The results indicated that:(1) About 70%~75% 14C photosynthesis production of flag leaf of main crop was distributed in spikes,and about 25%~30% remained in flag leaves and pedicle sheathes.(2) About 65%~80% photosynthesis production of flag leaf was distributed mainly in the upper second and third internodes of main crop.(3) Distribution proportion of photosynthesis production in spikes was negatively correlated with yield and its components of ratooning rice.On the contrary,its proportion in pedicle sheathes,flag leaves and other leaves was positively correlated with yield and its components of ratooning rice.(4) Distribution proportion of photosynthesis production in any internode was significantly positively correlated with the yield of the same node.