杂交中稻抽穗期天气对结实率的影响

Effects of Climate at Heading Stage on Setting rate of Hybrid Semilate Rice

为探索提高杂交中稻结实率的措施,2012-2013对杂交中稻品种抽穗期前后的主要气象因子进行观察,研究其对水稻产量及主要经济性状的影响。结果表明:水稻产量受气象因子的制约,特别是水稻抽穗期前后20d的气象因素对水稻结实率影响较大,Y两优585受抽穗期前10d天气变化影响较大,奇优894、金优785受抽穗期后10d天气变化影响较大。

To increase the setting rates of hybrid rice, the main meteorlogical factor of 2012 -2013 were observed before and after the heading of 3 semilate rice varieties, to study the effects of weather changes at heading stage on yield and economic traits of rice. The results showed that the yield of rice is restricted by meteorlogical factors, in particular, the 20 days before and after the rice heading in- fluenced rice seed setting rate, the weather at 10 days before heading has great influence the setting rate of Y Liangyou 585, while the weather at 10 days after heading has great influence the setting rate of Qiyou 894, Jinyou 785.