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研究了长白落叶松、水曲柳混交林(简称混交林)及纯林中长白落叶松(简称落叶松)的净光合速率、呼吸速率和蒸腾速率及其日进程、叶绿素,有机物和矿质元素的含量等。结果表明、混交林中落叶松树冠东、南、西、北四个方向的平均净光合速率和呼吸速率都太子落叶松纯林,在一天中的不同时刻观测值也是如此。混交林中落叶松的呼吸效率(净光合速率/呼吸速率)大于落叶松纯林,前者是2.11,后者是1.59,说明混交林中落叶松的高呼吸速率对其代谢及生长是有利的。混交林宁落叶松的蒸腾速率低于落叶松纯林,水分利用率却高于落叶松纯林。混交林中落叶松的叶绿素含量高,a/b 比低,这与其净光合速率高相关。混交林中落叶松的蛋白质及 N、K、Ca、Mg、Zn 含量高于落叶松纯林。提出了混交林生态环境的改善促进了树木的生理过程,最终导致生长加快的增产机制。
The net photosynthetic rate, respiration rate and transpiration rate and their diurnal course, chlorophyll, organic matter and mineral elements in Larix olgensis and Fraxinus mandshurica mixed forest (mixed forest) and pure forest of Larix olgensis Content and so on. The results showed that the average net photosynthetic rate and respiration rate of the Larix principis-rupprechtii in the mixed forest were the same at different times of the day. The respiration efficiency (net photosynthetic rate / respiration rate) of Larix gmelinii in mixed forest was higher than that of pure Larch forest, the former was 2.11 and the latter was 1.59, indicating that the high respiration rate of Larch in mixed forest was favorable to its metabolism and growth. The transpiration rate of Larix gmelinii was lower than that of Larix principis-rupprechtii, and the water use efficiency was higher than that of Larch. Larch in mixed forest has high chlorophyll content and low a / b ratio, which is related to its high net photosynthetic rate. The contents of L, N, K, Ca, Mg and Zn in the mixed forest were higher than those in the pure forest of Larch. It is proposed that the improvement of ecological environment in mixed forest promotes the physiological process of trees and finally leads to the mechanism of increasing yield with accelerated growth.