甬优9号产量构成因素相关分析及高产栽培技术

通过调查甬优9号作单季中稻种植不同产量水平下的产量构成及相关分析，探讨各产量因子间内在的联系及对产量的影响。结果表明，每穗粒数与产量的相关程度最密切，其次是结实率和有效穗，千粒重比较稳定，与产量的相关不密切。生产上应在确保高产所需有效穗的基础上，主攻每穗粒数，提高结实率，并兼顾粒重，为甬优9号高产栽培的有效技术途径。

Correlation Analysis Among Yield Components of Hybrid Rice Yongyou No.9 and Its High-yielding Cultivation Techniques

Yield components and their correlation coefficients of a single-cropping mid-season hybrid rice combination Yongyou No.9 under different yield levels were observed and analyzed, and the effect of yield components on grain yield were discussed. The results showed that grain yield had the highest correlation with spikelet number per panicle, the second seed setting rate and effective panicle number, and 1000-grain weight exhibited no significant relationship with yield owing to its stability. Rice production for high yield of Yongyou No.9 under sufficient effective panicle number should improve spikelet number per panicle, increase seed setting rate, and match grain weight. These are effective technical approaches of high-yielding cultivation for Yongyou No. 9.