B. campestris content of leaf chlorophyll, leaf area index , leaf area-weight ratio were positive significantly correlated with the PR.
红菜苔叶片叶绿素含量、叶面积指数及比叶重与群体光合速率成正相关；
The content of leaf chlorophyll was sensitive to soil moisture, under 5 kinds of different soil moisture status and the content of leaf chlorophyll was distinct.
叶片的叶绿素含量对土壤水分状况较为敏感，5种水分处理下苗木叶片的叶绿素含量有较大的差异。
Photosynthetic rate and chlorophyll content of flag leaf declined sharply, and leaf stomatal resistance increased rapidly in late period of senescence.
衰老后期，根系活力、叶片光合速率和叶绿素含量快速下降，叶片气孔阻力增加。
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