不同穗型水稻品种生理特性及其与产量关系的研究

结合辽宁省2000～2001年区域试验,对不同穗型水稻品种生理特性与产量关系进行了研究。结果表明,直立穗、半直立穗型品种(系)产量显著高于弯穗型品种。增加直立穗型品种的成粒率、半直立穗型品种的每穗颖花数和弯穗型品种的千粒重可以提高水稻产量。拔节期、成熟期干物质积累均与产量呈显著正相关。直立穗型品种产量与抽穗期剑叶叶绿素含量呈显著正相关,弯穗型品种产量与拔节期、抽穗期LAI呈显著正相关。由此可见,根据穗型进行栽培上的调控,可以获得高产。

Relationships Between Physiological Characters and Yields of Rice Varieties with Different Type of Panicle

In this paper, the relationships between the physiological characters and yields of rice varieties with different type of panicle were studied based on the regional test in Liaoning Province from 2000 to 2001.The results indicated that average yield of the varieties with erect or semi-erect panicle was significantly higher than that of the varieties with curved panicle. To increase grain yield, the percentage of ripened grains of the varieties with erect panicle, the number of spikelets per panicle of the varieties with semierect panicle and the weight of 1000-grain of the varieties with curved panicle would be improved. There were significant positive correlation between grain yield and the dry matter product of different type of cultivars at the elongating and maturity stages, significant positive correlation between grain yield and the chlorophyll content in flag leaves of the cultivars with erect panicle at the heading stage and significant positive correlation between grain yield and the LAI of the varieties with curved panicle at the elongating and heading stages.