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比较研究了落叶松水曲柳混交林及落叶松,水曲柳纯林的土壤含水量、土壤温度、土壤 pH 值、土壤全量矿质元素含量和树冠中各部位温度、照度和湿度等。结果表明,不同林分的土壤条件不同,同一林分不同土层的土壤条件也不同。混交林的各层土壤含水量、土壤温度、土壤 pH 值均高于纯林;随土壤深度的增加、各林分的土壤含水量、土壤温度、土壤 pH 值降低。与纯林相比,混交林土壤 N、P 含量较高,Cu、Zn、Mn、Ca、Mg、Fe、K 含量较低。不同林分的地上部生态条件也不相同,与落叶松纯林相比,混交林改善了林内的生态条件,使气温降低,湿度升高。这恰好有利于树木的生长。可以看出,落叶松水曲柳混交林的增产机制与其对生态条件的改善有关。
The soil water content, soil temperature, soil pH value, soil total mineral content and the temperature, illumination and humidity in various parts of the canopy of Larix gmelinii mixed forest and Larix principis-rupprechtii were compared. The results showed that different soil conditions in different stand, soil conditions in different soil layers of the same stand were also different. Soil water content, soil temperature and soil pH value in all layers of mixed forest were higher than those in pure forest. With the increase of soil depth, soil moisture content, soil temperature and soil pH decreased. Compared with the pure forest, the content of N and P in the mixed forest was higher and the contents of Cu, Zn, Mn, Ca, Mg, Fe and K were lower. Different parts of the forest above the ecological conditions are not the same, compared with the pure forest of Larch, mixed forest to improve the ecological conditions within the forest, so that the temperature decreases, the humidity increased. This happens to favor the growth of trees. It can be seen, Larch Manchurian ash mixed forest production mechanism and its improvement on ecological conditions.