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山林区属落叶阔叶林地带。由于历遭战争、森林火灾及乱砍滥伐的影响,形成的林分特点是阴坡林多,阳坡林少;萌生林多,实生林少,阔叶林多,针叶林少,混交林多,纯林少;林相不齐,密度小;林下灌木多;生长量低,材质较差,是典型的次生林区。构成林分的优势树种主要是辽东栎、山杨、白桦、油松、侧柏等。灌木林以荆条、马蹄针、枸子、胡颓子较多,主要分布在26°以上的阳坡,具有涵养水源、保土保水等作用。全局所辖经营面积247.9万亩,其中有
Mountain forest is deciduous broadleaf forest zone. Due to the war, forest fires and deforestation, the formation of the forest is characterized by more than the forest slope, less sunny slope forest; sprouting forest and more, less forest, broad-leaved forest, less coniferous forest, mixed Forest more, less pure forest; forest phase is not homogeneous, the density is small; many shrub undergrowth; low growth, poor material, is a typical secondary forest. The dominant tree species that make up the stands are mainly Quercus liaotungensis, Populus euphratica, Betula platyphylla, Pinus tabulaeformis and Platycladus orientalis. Shrubs Vitex, horseshoe needles, cotyledons, Elaeagnus more, mainly in the sunshine over 26 °, with conservation of water, soil and water conservation role. Under the jurisdiction of the overall operating area of 2479000 mu, of which there