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通过对试验地不同林分土壤性质及营养元素的测定，发现水曲柳落叶松混交林土壤ｐＨ值、有机质含量与水曲柳纯林无显著差异；土壤有效性Ｃａ、Ｍｇ、Ｚｎ、Ｆｅ均高于土壤养分的生物有效性临界值，不会对树木生长产生限制作用．而土壤有效Ｍｎ含量较低，在水曲柳纯林林地尤为不足，在水曲柳落叶松混交林中这种状况有较大改善，表现出与林木生长相一致的规律，说明土壤有效Ｍｎ的改善是水曲柳落叶松混交林较水曲柳纯林生产力高的主要原因之一．
Through the determination of soil properties and nutrient elements of different stands in the field, it was found that there was no significant difference in soil pH value and organic matter content between pure and semi-pure stands, and the available Ca, Mg, Zn and Fe The critical value of bioavailability of soil nutrients, will not have a limiting effect on the growth of trees. However, the soil available Mn content was low, especially in the pure Fraxinus mandshurica forest, which was greatly improved in the mixed forest of Ash and Larix principis-rupprechtii, showing a consistent law with the tree growth, indicating that the improvement of soil available Mn was Manchurian ash mixed forest Larix principis-rupprechtii high productivity one of the main reasons.