Abstract: The two-step-seedling raising method based upland-seedling has been studied in tricropping system rice area. This method efficiently combinates the techniques of upland seedling raising with two-step-seedling raising, which has stronger resistance against cool injury, longet seedling ages, more intensive management on fertilizing and irrigating, better quality of seedlings as well as higher yield. It is helpful to get high yield of double rice cropsunder this way by planting late-maturing early rice, sowing earlier, raising multi-tiller and strong seedlings, making "the full capacity" while not "overcapacity" for the combination of double rice cultivars.

Key words: early rice, tricropping system, seedling raising method

摘要： 根据洞庭湖三熟制稻区的生态特点及生产实践，提出了“旱育多两大”三熟制早稻育秧方式。这一方式将耐寒旱育秧与“多两大”两段育秧技术有机结合起来，具有抗逆性强、秧龄弹性大、肥水集约管理、秧苗个体发育均衡、秧苗素质好及增产、节膜等特点。这有利于温光资源较差的三熟制稻区选择迟熟早稻、适时早播、培育多蘖壮秧、实行品种搭配“满负荷”但不超负荷而促使早晚两季三熟全年高产。

关键词: 三熟制, 早稻, 育秧方式