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近几年,我省大面积试种杂交水稻取得成功。特别是在一九七六年这样前期气温明显偏低,盛夏高温伏旱严重,后期低温阴雨来得早的重灾之年,杂交水稻优势仍然显著。一九七七年气温接近正常,杂交水稻无论作早中稻、中稻,晚稻栽培,都普遍增产二、三成,突破了水稻单产长期徘徊不前的被动局面,进一步显示其巨大的增产潜力。实践证明,杂交稻对于四川气候具有广泛的适应性。但是,我省地处长江上游,虽与中下游地区同属华中亚热带湿润气候区,但由于地形闭塞,地势较高,热量分配有其特殊性,致使耕作制度及杂交水稻丰产栽培特点有别于其它各省。
In recent years, a large area of hybrid rice has been successfully planted in our province. Especially in early such a period in 1976, the temperature of the early stage was obviously low, the high temperature and volt-drought in midsummer was severe, and the late low temperature and rainy days came earlier and the advantage of hybrid rice was still significant. In 1977, temperatures approached normal. Hybrid rice increased its yield by 20% to 30% both for early-mid-season, middle-season and late-season cultivation, breaking through the passive long-term stagnation of rice yield and further demonstrating its huge yield potential. Practice has proved that hybrid rice has a wide range of adaptability to climate in Sichuan. However, the province is located in the upper reaches of the Yangtze River, although the middle and lower reaches of the same belong to the humid subtropical climate zone, but due to the blockage of the terrain, high terrain, heat distribution has its own particularity, resulting in tillage system and hybrid rice high yield cultivation characteristics are different from other Provinces.