7个水稻品种非结构性物质积累量及其再转移速度的比较研究

摘要

In order to research the yield formation of rice in tropical region,the non-structural matter accumulation and translocation rate of rice were investigated.Using 7 different rice varieties planted in Hainan as the materials,the difference of the non-structural matter accumulation and content in the heading stage and the translocation rate of the non-structural matter from stem to panicle in 14 days after the heading stage in shade conditions were studied.The results indicated that the non-structural matter accumulation was from 314.7 g/m2 to 553.85 g/m2; there were significant differences in different varieties; that for hybrid rice was higher than that for inbred rice,and that for indica hybrid rice was higher than that for japonica hybrid rice.The translocation rate of the non-structural matter was from 9.45 g/(d·m2) to 21.75 g/(d·m2); there were significant differences in different varieties,and that for indica hybrid rice was higher than that for japonica hybrid rice and inbred rice.The non-structural matter content was from 44.51％ to 51.48％; there were differences in different varieties; the nonstructural matter accumulation responded to the non-structural matter content.Rice which wtth high non-structural matter accumulation and content had the potential of stable yield and high yield.%为了探讨热带地区水稻非结构性物质的积累及其再转移特性,深入了解热带地区水稻产量的形成特点,以种植于海南的7个水稻品种为材料,研究抽穗期茎叶部非结构性物质积累量、含量及其抽穗后0～14d在遮光条件下向穗部再转移速度的差异性.结果表明:茎叶部非结构性物质积累量为314.7～553.85 g/m2,不同品种间差异显著,杂交稻大于常规稻,杂交稻中籼型大于粳型；茎叶部非结构性物质再转移速度为9.45～21.75 g/(d·m2),不同品种间差异显著,籼型杂交稻大于粳型杂交稻和常规稻；茎叶部非结构性物质含量为44.51％～51.48％,不同品种间差异显著,并且非结构性物质含量对非结构性物质积累量呈显著的正效应；茎叶部非结构性物质积累量和含量较高的品种具有稳产和高产潜力.