不同穗型水稻籽粒灌浆差异的研究

Research on the Grain-filling Difference of Different Spike Types Rice Varieties

对三种不同穗型水稻灌浆期进行研究,了解各类型水稻的灌浆特点,从中分析比较各类型水稻灌浆期强弱势粒间的差异。结果表明:穗数型品种的强弱势粒到达最大灌浆速率的时间差值最小,较为同步,生长上表现灌浆快;穗重型品种的强弱势粒到达最大灌浆速率的时间差值最大,而且弱势粒灌浆启动较慢,生长上表现灌浆慢;中穗型介于两者之间。原因在于各类型品种强势粒灌浆时间较一致;而各类型品种弱势粒间灌浆时间差异较大,导致不同穗型水稻品种灌浆不一致。

The difference of strong particles and sick particles of three different spike types in filling stage was analyzed after studying their grain-filling characteristics. The results indicated that the time difference of reaching the largest filling speed between strong particles and sick particles of raore-spike type variety was minimum,and growth presented filling faster;The weight-spike type was the opposite to more-spike type,and the middle-spike varieties between them. The reason was that the filling time of the strong particles of the three types was the same,while the time difference of sick particles was significant, which led to the differences of grain-filling.