Therefore,there are reasons assume that higher chlorophyll(a+b)contet and lower chlorophyll a/b ratio can be ued as a crterion ofselection for high net photosynthetic rate varieties in the areas where thesolar radiation level is low.

• 根据以上结果,本文提出,在辐射能量低的地区,选育叶绿素(a+b)含量较高、叶绿素 a/b 比值较低的品种是具有一定实践意义的。