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根据1987,1988两年四川省各地再生稻大面积生产结果,结合分析四川省1951～1980年的地面气象资料,从巩固和发展一季杂交中稻——再生稻这一新耕作制度出发,就四川省再生稻合理区域布局作了初步探讨。结果表明:1.两年再生稻单产稳定在75公斤、100公斤以上的县(市),大多分布在盆南长江河谷区,其面积分别占同年全省再生稻面积的67.30％和68.05％,两年单产比区外各县平均高4.92％和17.82％。区内多数县9月上旬平均温度在25℃以上,中旬在22℃以上,下旬在21℃以上。2.研究了四川省盆地内部份县海拔高度对8～10月旬均温回归关系,大约海拔高度每上升100米,8月各旬平均气温下降0.9～1.0℃,9月各旬和10月上旬依次下降0.82、0.58、0.55和0.48℃。回归预测表明,在海拔350米以下的地区9月中旬均温高于22℃的频率较高,这是规划再生稻适宜种植区的一项重要参数。3.以海拔350公尺以下和9月上、中、下旬均温≥25℃、≥22℃、≥21℃为依据,初步规划了当前以汕优63为代表的中迟熟杂交中稻——再生稻的适宜种植区。此外,还讨论了当前规划再生稻适宜种植区的依据,水稻品种改良与适宜区的关系,再生稻与双季稻生产的关系。
According to the results of large-scale production of ratooning rice in all regions of Sichuan Province in 1987 and 1988, combined with the ground meteorological data of Sichuan Province from 1951 to 1980, from the perspective of consolidating and developing the new cropping system of mid-season hybrid rice - ratooning rice, The reasonable regional layout of ratoon rice was discussed. The results showed that: (1) The yield of two-year ratoon rice was stable in 75 kg and 100 kg counties (cities), mostly distributed in the basin area of Yangtze River valley, accounting for 67.30% and 68.05% of the area of the same year respectively. Two-year yield than the counties outside the county average 4.92% and 17.82%. The average temperature of most counties in early September is over 25 ℃, midday is above 22 ℃ and late at 21 ℃. The research on the mean temperature regression of some counties in Sichuan Province from August to October showed that for each elevation of about 100 meters, the average temperature in each month dropped by 0.9-1.0 ℃ in September and 10 in September 0.82,0.58,0.55 and 0.48 ° C in descending order in early January. The regression prediction shows that the average temperature is higher than 22 ℃ in mid-September in the area below 350 meters above sea level, which is an important parameter to plan suitable planting areas for ratoon rice. Based on the average temperature of ≥25 ℃, ≥22 ℃ and ≥21 ℃ in the upper, middle and late September, the mid-late maturing hybrid rice - Shanyou 63, Regeneration of rice suitable planting area. In addition, the basis for planning suitable planting areas for ratooning rice, the relationship between rice variety improvement and suitable area, and the relationship between ratooning rice and double cropping rice are also discussed.