Breeding and high-yield cultivating techniques for new hybrid rice combination—Ⅱ Youfu 819
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摘要: 利用花粉辐照结合生物杂交技术育成的南恢辐819与Ⅱ-32A配组成的籼型杂交晚稻新组合Ⅱ优辐819,具有优质、高产、稳产、适应性广等特点,先后通过福建省、江西省农作物品种审定委员会审定;为更好地推广该组合,运用最优设计对Ⅱ优辐819进行密度、秧龄、施氮量等3项栽培措施研究,并建立产量与3项栽培措施的回归模型,分析了栽培措施对产量的影响。结果表明,3项措施对产量都有影响。经微机模拟筛选出综合高产技术措施:每公顷插14.8~28.1万丛、秧龄32~33 d、施纯氮96.9~167.7 kg。Abstract: New indica hybrid rice combination—Ⅱ Youfu 819 bred by pollen-radiation had the characteristics of good grain quality,high-yield,stable-yield and wide adaptability.The combination passed the examination and approval of the Crop Variety Approval Committee of Fujian and Jiangxi provinces respectively.In order to extend the combination,three influential elements including planting density(x1),seedling age(x2) and quantities of nitrogen(x3)applied,were studied by using optimized design.A regression model for these three elements and yield were established.The analysis result indicated that all of these elements affected the yield to some extend.According to the result of computer simulation screening,a comprehensive cultivating pattern was 148 000-281 000 hills per hm2,32-33 days for seedling age and 96.9-167.7 kg N applied per hm2.
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Key words:
- hybrid rice /
- ⅡYoufu 819 /
- breeding /
- optimized design /
- high-yield cultivating technique
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