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施用多效唑和控制秧龄是晚稻大苗盘式旱育抛秧的两大技术关键 ,而且两者有明显的互作。多效唑浓度低时 ,要注意秧龄长短的选择 ;长秧龄时 ,要小心选择多效唑使用浓度与次数。 2 5 0～ 35 0mg/kg均为多效唑有效施用浓度 ,秧龄以 30d内为宜。秧龄 2 5～ 30d的 ,于一叶一心时喷 1次 30 0mg/kg多效唑即可 ;秧龄超过 35d ,宜于一叶一心、三叶一心各喷一次 30 0mg/kg的多效唑
The application of paclobutrazol and control of seedling age are the two key techniques of panicle seedling throwing and transplanting in late rice, and there is a clear interaction between the two. Paclobutrazol concentration is low, pay attention to the choice of seedling age; long seedling age, be careful to choose the concentration and frequency of paclobutrazole. 25O ~ 35 0mg / kg are paclobutrazol effective application concentration, seedling age within 30d is appropriate. Seedling age 2 5 ~ 30d, a leaf one heart spray 1 times 30 0mg / kg Paclobutrazol can; seedling age more than 35d, should be a leaf one heart, three leaves one heart spray 30,000 mg / kg paclobutrazol