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近几年来,随着“农业学大寨”群众运动的深入开展,我县双季晚稻面积逐年扩大,产量也有不同程度的提高。但是,由于我县属高寒山区,稻田分布在海拔500—1200公尺之间,年平均气温15.3℃,四季云雾多,日照时数少,秋季温度下降明显,水稻有效生长期较短,种植常规晚稻品种,往往由于前期发蔸不快,长不起苗架,加之后期严重的穗颈稻瘟危害,致使晚稻产量不高,亩产长期徘徊在200至300斤之间。因此,选育分蘖力强、繁茂性好、耐肥抗病的晚稻品种,是我县晚稻生产中迫切需要解决的问题。
In recent years, with the deepening of mass movement of “learning from agriculture in Dazhai”, the area of double-season late rice in our county has been expanded year by year, and the yield has also been raised to varying degrees. However, since my county belongs to the alpine mountainous area, the paddy fields are distributed at an altitude of 500-1200 meters and the annual average temperature is 15.3 ℃. There are many cloudy and cloudy seasons and few sunshine hours, and the temperature in autumn is obviously decreased. The effective growth period of rice is short, Late rice varieties, often due to premature displeasure, not grow up seedlings, coupled with severe late panicle neck blast damage, resulting in late rice yield is not high, long-term hovering in the 200 to 300 pounds per mu. Therefore, breeding tillering strong, good longevity, resistance to disease resistant late rice varieties, is my county in late rice production in urgent need to solve the problem.