我国长江中下游连作稻区,由于茬口限制,连作晚稻秧龄长,育秧期间又值夏季高温,秧苗生长迅速,移栽时苗体过大,苗质欠佳;栽后倒苗、败苗严重,推迟返青,延误季节,影响产量。生产上采用的“两段育秧”技术,虽然可以缓解这一矛盾,但费工费力,操作辛劳。因此,如何培育连晚壮秧,确保连作晚稻高产、稳产,是当前稻作生产中迫切需要解决的研究 Due to the limitation of stubble, even the late rice seedling age is longer, the summer high temperature during seedling growing, the seedling grows rapidly, the seedling body is too large when transplanted, and the seedling quality is not good; Postponing the return of green, the delay of the season, affecting output. The “two-stage seedling-raising” technology used in production can alleviate this contradiction, but it takes a lot of labor and hard work. Therefore, how to cultivate even late seedlings, to ensure continuous production of late rice high yield and stable yield, is the urgent need to address the current rice production research