论文部分内容阅读
杂交粳稻“京引177A×C57”是当前大面积推广的主要杂交组合。这个组合的杂交优势强,增产幅度大,制种产量高,很受群众欢迎。最近经审定已定名为“辽优一号”。这个组合的制种产量虽然比籼稻高很多,但是大面积制种只在200—300斤之间,兑换种子的用粮比例仍然很高,多数是一比六。按每亩用种8斤计算就需要48斤,比常规品种每亩多消耗30多斤,代价很高,给杂交稻大面积推广带来了一定的困难。但是,通过三年大面积制种的实
Hybrid japonica rice “Beijing cited 177A × C57 ” is the main hybrid large area promotion. This combination of hybrid advantages, increase yield, seed production is high, very popular with the masses. Recently approved has been named “Liaoyou One ”. Although the seed production of this combination is much higher than that of indica rice, the large-scale seed production is only between 200 and 300 kg. The proportion of grain used for seed exchange is still very high, mostly one to six. According to the calculation of 8 kg per mu, it takes 48 kg, which consumes more than 30 kg more than the conventional varieties, which is very expensive and poses some difficulties for the large-scale promotion of hybrid rice. However, through the actual production of large-scale seed production in three years