凤城县宝山地区生长着柞树、核桃楸、腊树等阔叶树,同时还有落叶松与柞、红松与核桃楸的混交林,多呈块状或带状混交,其生长旺盛,枝叶繁茂。我们认为,混交林能很好地改良土壤,提高土壤肥力,枯枝落叶积层厚,防止水土流失,保持生态平衡,能充分利用地力和有效空间,有效地防止火灾的 Baoshan District, Fengcheng County, the growth of oak tree, walnut, wax tree and other broad-leaved trees, as well as larch and oak, Korean pine and Juglans mandshurica mixed forest, mostly lumpy or banded mixed, its strong growth, lush foliage. In our opinion, the mixed forest can well improve the soil, increase the fertility of the soil, accumulate thick layers of litter, prevent water and soil loss, maintain ecological balance, make full use of soil fertility and effective space, and effectively prevent fire