杂交中稻蓄留再生稻的生产面积在四川省已发展到600多万亩,亩产变动在75.5—106公斤之间,最高年增产稻谷7.13亿公斤。但目前再生稻的单产水平还很低,年度间的单产也不稳定,变动幅度较大,蓄留再生稻的成功率不到70％,所以尚不能成为一项固定的耕作制度。四川双季稻的亩产虽达到700公斤左右,比中稻留再生稻亩增产104公斤,而栽种面积却在连年缩减。为了促进水稻两熟地区能充分利用热量和土地资源,缓解再生稻与双季稻互挤的矛盾,并能形成一种耕作制度,发展稻谷生产,使粮食生产持续稳步增长,我们开展了“中稻再生稻套种晚稻技术体系研究”(或称再生稻晚稻共生技术体系)。经过试验和初步示范,取得了较明显的效果。 The area for hybrid rice reserve ratooning rice has grown to more than 6 million mu in Sichuan Province with a variation of 75.5-106 kilograms per mu and the highest annual output of 713 million kilograms of rice. At present, however, the yield of ratooning rice is still very low, and the yield per unit area is also unstable and varies greatly during the year. The success rate of ratooning rice storage is less than 70%, so it can not yet become a fixed tillage system. Though the yield per mu of double-crop rice in Sichuan reached about 700 kg, it increased by 104 kg compared with that of middle-rice left regenerated rice, while the area planted with rice has shrunk in successive years. In order to promote the utilization of heat and land resources in areas with double ripening rice, alleviate the mutual contradictions between re-growing rice and double-cropping rice, and form a tillage system to develop rice production and maintain steady growth of grain production, we conducted “Medium Rice Late Rice Interplanting Rice Intercropping Technology System ”(or called late rice symbiotic technology system). After testing and preliminary demonstration, has achieved more obvious results.