High-yielding Cultivation Technique of Yongyou No.12

甬优12超高产栽培技术途径分析(英文)

[Objective] The research aimed to understand the high-yielding technique in intersubspecific hybrid rice Yongyou No.12. [Method] The correlation analysis, regression analysis and path analysis of intersubspecific hybrid rice Yongyou No. 12 were conducted based on the data of its ear, grain and weight with yield higher than 10 500 kg/hm^2. [Result] The enhancement of effective ears would restrain the number of per ear total grains. It was found that the direct contributions of main economic traits to yield were determined to be effective ear〉total grains per ear〉 seed setting rate〉l 000-grain weight. [Conclusion] The high-yielding cultivation techniques were suggested as follows： besides necessary ear number, grain number per ear should be focused with a consideration to 1 000-grain weight.

[目的]探索超级稻甬优12超高产栽培的有效技术途径,进一步发挥甬优12的增产增效潜力。[方法]测定甬优12产量大于700kg以上的产量性状数据,利用相关、回归和通径分析方法分析甬优12的穗、粒、重结构,研究各因素间的内在联系和对产量贡献的大小。[结果]在700kg以上产量水平下,有效穗与粒数是两个相互制约的产量因子,各产量因子作用于产量的效应大小依次为:有效穗>每穗总粒数>结实率>千粒重。[结论]确保有效穗数、稳定粒数、兼顾千粒重,是实现单季杂交晚稻甬优12超高产栽培的有效技术途径。