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湖北省发展双季稻已有四分之一世纪,但二季晚稻单产长期徘徊在300斤左右,直到1979年才突破400斤,其波动指数高到0.38。这种低而不稳的现象,历来为农业科技工作者所关注,并作为探索中的重大课题之一。然而,导致低而不稳的主要原因是什么?突破点在哪里?至今各说不一。弄清这个问题,不仅关系到发展二季晚稻生产的有效对策,而且涉及到二季晚稻的育种方向。
The development of double cropping rice in Hubei Province has been a quarter of a century ago. However, the yield of late season rice in the second season has hovered around 300 kilograms for a long time and only reached 400 kilos in 1979, its volatility index is as high as 0.38. This low and unstable phenomenon has always been the focus of agricultural science and technology workers, and as one of the major issues in the exploration. However, the main reason leading to low and unstable? What are the breakthrough points? To understand this issue is not only related to the development of effective measures for the production of late rice in the second season, but also to the breeding of late rice in the second season.