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在川东南双季稻适宜区稳步扩大双季稻,提高稻田复种指数具有很大的增产潜力。按照我省水稻区划,这个区域有稻田1054万亩,其中680万亩在海拨400米以下,300多万亩温光、热量条件最好,适宜种植双季稻,近10多年来,由于品种、栽培技术的逐步配套完善,双季稻产量大幅度提高。1989—1991三年双季稻亩产分别达到702、706、719公斤,均比当年一季中稻增产200公斤以上。在川南双季稻集中种植区还出现了一些双季稻亩产八九百公斤和超吨谷的高产典型。这些为双季稻的进一步恢复发展,积累了经验。为此,全省计划1992年双季稻面积恢复到85万亩,比1991年面积增加20万亩,力争两季亩产达到750公斤,现提出以下高产栽培技术,供各地参考。
In the area suitable for double cropping rice in southeastern Sichuan, it is possible to increase double cropping rice steadily and increase the multiple cropping index in paddy field, which has a great yield potential. In accordance with our province’s rice regionalization, this region has 1054 acres of paddy fields, of which 680 acres at an altitude of 400 meters below 300 million mu of warm light, the best heat conditions, suitable for planting double cropping rice, nearly 10 years, due to species , Cultivation techniques gradually perfect, double-cropped rice production increased significantly. In the three years of 1989-1991, the per-mu yield of double-crop rice reached 702,706,719 kg respectively, both higher than the increase of 200 kg in the first quarter of that year. In the concentrated rice-growing areas of double-cropped rice in southern Sichuan there are also some typical high-yielding varieties of double-cropped rice yielding 8900 kg and ultra-tonnage. These have accumulated experience for the further recovery and development of double cropping rice. To this end, the province plans to double rice area in 1992 to 85 million mu, an increase of 200,000 mu more than the area in 1991, and strive to reach 750 kg per mu in the second quarter. Now put forward the following high-yielding cultivation techniques for reference.