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天然次生林是原始天然林经过人为历次破坏,如历代反动统治阶级滥砍乱伐及烧垦,火灾等,再次生长起來的林子,其中也包括一部分残败的原始天然林。就我国目前的森林资源情况来说,天然次生林是分布较广、面积较大的一种森林类型。原来茂密的森林复被遭到破坏,气候、土壞、植被等立地环境发生变化后,原来的优势树种便不能生存或逐渐减少,适应新环境的树种就侵入被破坏了的林地更替了原来的树种。
The natural secondary forest is a forest that has once again been grown by man-made destruction of natural forests, such as deforestation and burning cultivation and fires of the reactionary ruling classes of all generations, including some of the original and ruined natural forests. For the current situation of forest resources in our country, the natural secondary forest is a kind of forest with a wide distribution and a large area. The original thick forest complex was destroyed. After the climate, soil erosion and vegetation changed, the original dominant tree species could not survive or diminish. The tree species adapted to the new environment invaded the destroyed forest land and replaced the original species.