Abstract:

In order to provide a scientific basis for rice variety selection under deep water irrigation of fish culture in paddy field, a pot experiment was carried out to study the performance of yield and yield components of 15 hybrid rice under the condition of inundated 15 cm from 20 days after transplanting to maturity. The results showed that the yield of Chuanguyou 2348, Yixiangyou 2115, Qiyou 894 and Rongyou 22 were increased by 14.54% to 20.74 % compared with the average yield of the 15 combinations under deep water irrigation. Path analysis showed that the top three factors, which had great direct positive effect on yield, were effective panicles,       1 000-grain weight and grain number per panicle from high to low.

Key words: hybrid rice, deep water irrigation, variety, yield

摘要：

为给稻田养鱼模式提供适宜的水稻品种，以15个杂交中稻品种为材料，采用盆栽试验方法研究了在移栽后20 d至成熟期淹深水（15 cm）条件下，不同品种的产量及其相关因子表现。结果表明，川谷优2348、宜香优2115、奇优894、蓉优22等4个杂交组合在淹深水条件下产量相对较高，比15个组合的平均产量高14.54%～20.74%，通径分析表明，对产量直接正效应较大的前3个因子从高到低依次为有效穗数、千粒重、每穗粒数。

关键词: 杂交中稻, 深水灌溉, 品种, 产量