辽宁省水稻不同产量类型品种产量结构的比较分析

以辽宁省2005年~2011年审定的部分水稻品种为材料,依据产量水平将69个水稻品种划分为高产、中产、低产3个产量类型,研究辽宁省水稻品种产量结构特征,比较了不同产量类型品种产量性状变化。表明,有效穗数、总粒数、千粒重是影响水稻产量表现的最主要的性状因子。高产类型品种在有效穗数、总粒数上处于中高值的比例较高,同时,在性状组合上性状间尤其是在有效穗数和总粒数的结合上表现协调,产量结构运筹上较为合理。水稻品种要获得650 kg/667 m2以上产量的产量结构参数为：有效穗数15个/穴、总粒数125粒/穗,结实率85%左右,千粒重25 g左右。

Comparative Analysis on Yield Component with Different Yield Types of Rice Varieties in Liaoning

Using different rice cultivars which were approved from 2005 to 2011 as materials, 69 rice varieties were divided into high yield type, middle yieTd type and low yield type to research yield structure and compared yield component with different yield types of rice varieties, the results indicated that effective panicles, total grains, lO00-grain weight were main character factors to affect yield. Effective panicles and total grains had higher rates on high yield varieties, at the same time, it gives the coordination to combine effective panicles and total grains on combination Of traits, so get the reasonable structure of yield. The structure parameters of yield which can achieve more than 650 kg/667 m2were 15 ear/hole on effective panicles, 125 grains/ panicle on total grains, 85% on seed rates and 25 g on 1000-grain weight.