速生丰产林成材年限短,材积增长快,据调查,速生丰产林木材产量比一般人工林提高5—20倍,可提前5—10年成材。营造速生丰产林有很多好处,不仅增加了森林覆被率,而且还能很快地发挥森林防风固沙、涵养水源、美化环境、保护农田、净化空气、调节气候等多种效益。除提前提供木材外,在三、四年内还可搞林粮间作。达拉特旗长太林场为了弥补林 According to the survey, the output of fast-growing and high-yielding forests is 5-20 times higher than that of general plantations and can be finished 5-10 years ahead of schedule. There are many benefits to creating fast-growing and high-yielding forests, which not only increase the forest cover rate, but also can quickly play a variety of benefits such as forest windbreak and sand fixation, water conservation, landscaping, farmland protection, air purification and climate regulation. In addition to timber provided in advance, in three or four years can also engage in intercropping forest. Dalate flag long too forest field in order to make up forest