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适期早播培育大壮苗,是弥补油菜冬前生长量不足,实现“冬壮、冬发”,为稳产、高产奠定基础的好办法。据郊县多年实践证明,9月20～25日前后是油菜播种的最佳时期。由于播期提早,秧龄延长,如播量过多,间苗不及时,留苗过多或肥水管理失当,就会出现“高脚苗”。“高脚苗”的形成不但削弱了早播壮苗优势,而且还常被群众误认为是早播会导致“高脚苗”,而不敢适期早播。因此,正确认识油菜适期早播与“高脚苗”形成的关系,以及如何加强对“高脚苗”的管理,对郊区油菜生产具
Suitable early sowing big strong seedlings, is to make up for lack of growth of rape before winter, to achieve “winter strong, winter hair”, lay a good foundation for stable production and high yield. According to years of practice in suburban counties that September 20 to 25 is the best time for rapeseed sowing. As sowing earlier, the extension of the seedling age, such as sowing too much, not in time for the Miao Miao, Miao too much fertilizer or water management misconduct, there will be “tall feet Miao.” The formation of “tall-footed” not only weakened the advantage of early-stage stronghold but also often misunderstood by the masses as being early-sowing, which would lead to “tall-footed seedlings” but could not sow the early sowing period. Therefore, we should correctly understand the relationship between early sowing date of rape and the formation of “tall-footed seedlings” and how to strengthen the management of “tall-footed seedlings”