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连晚抛秧栽培,由于受品种生育期、秧龄、抛栽苗高的限制,一般只能选用特早熟晚粳品种。特早熟晚粳的主要特点是全生育期短,营养生长期比中熟晚粳短10～15天,苗期的干物质积累少,难以形成较大的个体和群体。由于感光性比中熟晚粳弱,感温性强,生育期稳定性差,抽穗结实受气候因素影响大,年度间产量变幅大。针对特早熟晚粳作连晚抛秧存在的问题,绍兴市农技推广部门经试验比较,认为选用中熟晚粳宁波2号作连晚抛秧品种,在栽培技术上采用烯效唑和多效唑控苗,适当增加抛秧盘数,确保基本苗,可以达到比应用特早熟晚粳作
Even throwing seedlings cultivation, due to the variety of growing season, seedling age, throwing planted seedling height restrictions, generally only use special early maturing varieties of late japonica. The main characteristics of extra-early-maturing late japonica rice are all short growing period, the vegetative growth period is 10-15 days shorter than that of middle-maturing late japonica rice, and the dry matter accumulation at the seedling stage is small, making it difficult to form larger individuals and groups. Because of late light sensitivity than the late maturity, temperature sensitive, poor stability during the growing season, the heading and fruiting climatic factors, large annual yield fluctuations. In view of the problem of even late maturing late rice throwing seedling, Shaoxing Agricultural Extension Department compared the trial that late maturity japonica rice Ningbo No.2 was selected as the late throwing seedling variety, and the cultivation techniques adopted uniconazole and paclobutrazol Seedlings, an appropriate increase throwing tray number, to ensure that the basic seedlings, can be achieved than the application of special precocious late Japonica