我国各地油菜栽培密度相差很大,从每亩四、五千株到二、三万株,甚至四、五万株的都有。因而,研究油菜在不同条件下的个体生长发育与群体結构变化的規律,探討合理密度,借以調节个体与群体之間的关系,使群体結构得到充分的发展,从而提高产量,在生产实践上是很有意义的。 The density of rapeseed varies greatly across China, ranging from four to five thousand per acre to two or three thousands, or even four or five thousand. Therefore, the law of rapeseed growth and population structure under different conditions was studied, and the reasonable density was explored to regulate the relationship between individuals and groups so that the population structure could be fully developed so as to increase the yield. In practice, It makes sense.