阔叶林是亚热带地带性顶级森林生态系统,是森林资源的重要组成部分,其在水源涵养、水土保持、调节气候、净化空气以及保持生物多样性等方面具有重要的作用。同时,阔叶林中的很多树种都具有很高的经济价值,在家具、建筑、造纸、雕刻、细木工等方面被广泛应用,是人民生活、农村农业产业发展和工业产品制造的重要原料。自20世纪80年代以来,农业得到了迅速的发展,由于人们对阔叶林资源的重视不够,大量的天然阔叶林被肆意砍伐,原生植被几乎破坏殆尽,现残存的原生植被、半原生植被已十分稀少,仅在山区交通不便的偏远地段才有小片的常绿阔叶林保留。如今能够看到的阔叶林基本上都是20世纪80~90年代采伐后遗留下来的次生阔叶林。这些阔叶林远看是青山,近看不成材,且生长极不平衡。因此,如何经营和保护好现有的次生阔叶林、发展阔叶林资源已成为当前林业生产上待解决的重大问题。 Broadleaved forest is the subtropical top forest ecosystem and is an important part of forest resources. It plays an important role in water conservation, soil and water conservation, climate regulation, air purification and biodiversity conservation. At the same time, many tree species in broad-leaved forests are of high economic value. They are widely used in furniture, construction, papermaking, carving and joinery, and are important raw materials for people’s livelihood, rural agricultural industry development and industrial product manufacturing. Since the 1980s, agriculture has been rapidly developed. Due to the lack of attention to the resources of broad-leaved forests, a large number of natural broad-leaved forests have been deliberately deforested and the native vegetation almost destroyed. The remaining native vegetation, Vegetation has been very scarce, only a small piece of evergreen broad-leaved forest retained in remote areas of mountainous transport inconvenience. The broad-leaved forests that can be seen today are basically the secondary broad-leaved forests left over from harvesting in the 1980s and 1990s. These broad-leaved forests are green mountains in the distance. They are almost unsightly and their growth is extremely uneven. Therefore, how to operate and protect the existing secondary broad-leaved forest and develop the resources of broad-leaved forest has become a major issue to be solved in the current forestry production.