培育油菜壮苗是夺取油菜高产的基础。但何为壮苗?怎样才能培育壮苗呢?根据许多研究、高产单位的经验和我们的生产实践,综述如下。一、壮苗的特征和增产效果油菜壮苗一是移栽时要求适宜的苗龄,二是苗架要求达到一定的形态指标,三是要求一定的长势长相。苗龄太短,苗架小,苗子弱,移栽后易受冻致病;苗龄太长,幼苗互相拥挤,形成高脚苗、老化苗、徒长苗,甚 Nurturing strong rapeseed rape is to seize the basis for high yield. But what is strong seedlings? How to nurture strong seedlings? Based on many studies, the experience of high-yielding units and our production practices are summarized below. First, the characteristics of strong seedlings and increase yield Rape seedling first transplanting requires appropriate seedling age, and second, seedlings require a certain degree of morphological indicators, the third is the requirement of certain growth looks. Seedling age is too short, seedlings small, weak seedlings, vulnerable to freeze-thaw disease after transplanting; seedling age too long, crowded with each other to form seedlings, aging seedlings,