粳稻品质与株型的关系研究

Relationship between grain quality and plant type of japonica rice

1999-2000年在田间条件下,对粳稻品种(系)的叶片和茎秆形态、穗型及群体光合速率与稻米碾磨品质和外观品质的关系进行了研究.结果表明,顶部叶片、穗下节间、叶鞘长度、穗的着粒密度、群体光合速率与稻米品质各指标关系密切.理想的优质粳稻株型应为:在一定范围内,上部叶片长、窄,穗下节间长,中下部节间短、叶鞘长,着粒密度较小的散穗型,经济产量和品质形成期较弱的群体光合速率.

The relationship between plant type and grain quality were discussed with 35 varieties in the field experiments carried out from 1999 to 2000The results showed that there were significant correlations between the length or width of leaves,stem and sheath,uppermost internode canopy apparent photosynthesis,density of spikelet and grain quality indexThe ideal higher grain quality plant type is as follows:the upper leaves were longer but narrow,the uppermost internode was longer,the basal internode was shorter,the basal sheath was longer,the density of spikelet was less and the canopy apparent photosynthesis after heading was weak