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为超高产杂交水稻品种的合理布局提供理论参考,从贵州省近年选育和引进的35个具有超高产潜力的水稻品种(组合)中筛选出生态适应型品种(筑优606和黔优108)及生态敏感型品种(Y两优2号和Y两优302),比较2类水稻品种的产量及其构成、分蘖特性及物质积累特性的差异,探索超高产杂交水稻品种的生态适应性。结果表明:相对生态适应型品种,生态敏感型品种的产量平均降低15.9%,结实率降低11.0%,千粒重降低15.5%,差异均达显著水平,有效穗数和穗粒数差异较小;分蘖成穗率较低,干物质积累量抽穗至成熟阶段显著降低,收获指数低。
This study provided a theoretical reference for the reasonable layout of super high-yielding hybrid rice varieties. The eco-adapted varieties (Zhuyou 606 and Qianyou 108) were screened from 35 high yielding rice varieties (combinations) selected and introduced in Guizhou Province in recent years. (Y Liangyou 2 and Y Liangyou 302) were selected to compare the yield, composition, tillering traits and material accumulation characteristics of the two types of rice cultivars, and to explore the ecological adaptability of the super high-yielding hybrid rice varieties. The results showed that the yield of ecologically sensitive varieties decreased by 15.9%, the seed setting rate decreased 11.0%, the grain weight decreased 15.5%, the differences were significant, the difference between effective panicles and grains per spike was less; Spike rate was lower, dry matter accumulation decreased from heading to maturity stage, and harvest index was low.