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为探明播栽期对机插连作晚稻产量及构成特征的影响,试验以籼粳杂交稻甬优9号和杂交晚粳稻嘉禾优555为材料,研究了播栽期对机插晚稻秧苗素质、生育期、产量及相关性状的影响。结果表明:随着播期推迟,移栽秧苗素质下降,抽穗期推迟,安全齐穗风险加大;甬优9号机插以6月23日播种、7月20日移栽时秧苗素质好,安全齐穗风险小,产量最高;嘉禾优555则以7月2日播种、7月24日移栽产量最高;在茬口许可的情况下早播应首选甬优9号,其次是嘉禾优555,这样有利于合理搭配播种时间以充分发挥品种生产潜力获得高产。
In order to explore the effects of sowing date on the yield and its composition characteristics of late rice intercropping, the experiment was conducted with the indica japonica hybrid rice Yongyou 9 and the hybrid late japonica rice Jiaheyou 555 as test materials. The effects of sowing date on the quality, Growth period, yield and related traits. The results showed that with the delay of sowing date, the quality of transplanted seedlings decreased, the heading stage was postponed and the risk of safe heading was increased. Yongyou 9 was sowed on June 23 and the seedlings were good on July 20, Safe and low risk of panicles, the highest yield; Jiahe You 555 to sow on July 2, July 24, the highest transplanting output; in the case of crop permit should be preferred early Yongyou 9, followed by Golden Harvest 555, This is conducive to a reasonable match with the sowing time to give full play to the potential yield varieties to obtain high yield.