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组成长白山阔叶红松林的主要树种红松、云杉、落叶松、大青杨、白桦、椴树、水曲柳和色木的幼树 ,盆栽于模拟自然光照和人工调节CO2 浓度为 70 0 μl·L-1、40 0 μl·L-1的气室内两个生长季 ,以生长在 40 0 μl·L-1下的幼树为对照组 ,在各自生长条件下测定 ,高CO2 浓度下生长的红松、云杉、落叶松、大青杨、白桦、椴树、水曲柳和色木的高生长比对照组的幼树提高 10 %～ 40 % .高CO2 浓度的幼树与对照CO2 下的幼树相比各树种蒸腾速率升降不一 ,但水分利用效率均有不同程度的提高 ,不同树种的可溶性糖和叶绿素含量对高CO2 浓度反应不一 ,反映出幼树对高CO2 浓度适应的复杂性 .长期高CO2 浓度环境下生长的阔叶树对CO2 变化反应较针叶树敏感 ,供试树种均发生光合驯化现象 .
The main tree species of Korean pine, spruce, larch, poplar, birch, lime tree, ash and color wood in Changbai Mountain broadleaved Korean pine forest were potted in simulated natural light and artificially adjusted CO2 concentration of 70 0 μl · L-1 and 40 μl · L-1 in two indoor growing stages, and the young seedlings grown at 40 0 μl·L-1 were used as the control group under the respective growth conditions. Under high CO2 concentration The growth of Korean pine, spruce, larch, Populus euphratica, Betula platyphylla, Linden, Fraxinus mandshurica and Seleucus increased 10% ~ 40% Compared with the control, the transpiration rate of saplings in CO2 increased and decreased by different degrees, but the water use efficiency increased to some extent. The soluble sugar and chlorophyll content of different species reacted differently to high CO2 concentration, The complexity of adaptation The broad-leaved tree that grew under long-term high CO2 concentration was more sensitive to CO2 than that of coniferous tree, photosynthetic domestication occurred in all the tested species.