The shoot growth and the pigment content,net photosynthetic rate,transpiration rate and chlorophyll fluorescence of leaf under different shading treatments(0%,15%,35% and 50%)were investigated in david maple seeding.

• 研究了遮光15%25、35%25、50%25和全光照处理对青榨槭新梢生长、叶片色素含量、净光合速率以及叶绿素荧光参数的影响。