川东南地区无论是中稻或双季稻,单产均不高不稳,形成中稻以早熟品种为主,“双季晚稻”只不过是生产的“措头”。中稻前茬是小麦或屯水田,双季晚稻前茬早稻,两者前茬收获期均迟,后茬栽插也迟。这样,水稻前期生长不足,后期易受不良气候影响,加之水稻生育后期气温变化大,常有高温、伏早或低温、冷害袭击,致使水稻产量长期不高、不稳。为抓 Whether it is medium or double cropping of rice in southeast Sichuan, yield per unit is not high and instability, the formation of medium early rice varieties, “double season late rice” is only the production of “measures.” Mid-season crop is wheat or Tuen paddy fields, double cropping rice before the first crop of early rice, both before the harvest period are late, stubble late planting. In this way, lack of growth in the early rice, late susceptible to adverse weather effects, combined with the late rice growth temperature changes, often high temperature, volt early or cold, chilling attack, resulting in long-term low yield of rice, instability. To catch