叶是油菜进行光合作用的主要器官,是油菜一生的主要代谢源,特别是花期,对油菜开花和结果具有举足轻重的地位和作用。因此,摸清初花后植株叶片的动态变化规律是极为必要的。过去的研究指出,油菜主茎叶片的寿命长短、及其干重均是自下而上由小到大,再变小,各节位叶的最大叶面积和干重一般出现在上面长柄叶与短柄叶的范围内。而对于初花后植株叶片由上而下的动态变化规律以及单位叶面积干重 Leaf is the main organ for photosynthesis of rapeseed. It is the main metabolic source of rape in its lifetime, especially its flowering period, which plays a pivotal role in the flowering and fruiting of rapeseed. Therefore, it is necessary to find out the dynamic changes of plant leaf after early flowering. Past studies have pointed out that the main stem of rape longevity, and its dry weight are bottom-up from small to large, and then smaller, the maximum leaf area of ​​each node leaves and dry weight generally appear in the above long-handled Leaves with short shanks within the range. For the first-flowering plant leaves from top to bottom dynamic changes and the unit leaf area of ​​dry weight