开春后,油菜进入春发时期,其营养生长和生殖生长很旺盛,需要吸收大量养分。根据我们多年来开展油菜高产施肥的实践说明,春后油菜施肥根据不同苗情,掌握早施春肥、重施苔肥、补施花肥、喷施硼肥的原则,能确保油菜稳产高产。一、早施春肥油菜施好春肥能弥补冬季生长之不足,促使多分枝、早现蕾,一般在大寒后立春前施,以碳铵等速效性氮肥为主,施肥量应根据冬季施肥的多少和苗情 After the spring, rape into the spring hair period, its vegetative and reproductive growth is very strong, need to absorb a lot of nutrients. According to our practice of rapeseed high-yield fertilization for many years, the principle of applying spring fertilizer, applying fertilizers and applying boron fertilizer can ensure stable and high yield of rape according to different seedling conditions. First, as early spring fertilizer Rape good spring fertilizer to make up for the lack of winter growth, prompting a multi-branched, early budding, usually in the spring before the onset of large cold to ammonium bicarbonate and other quick-acting nitrogen-based fertilization should be based on winter fertilization How much and seedlings