次生林面积较大,分布也广,所以对这种林分的抚育、改造,实是扩大森林资源,加速恢复与发展森林多种效益,满足国民经济建设用材的有效途径之一。 Secondary forests are large in area and widely distributed. Therefore, tending and transformation of this kind of forest is indeed an effective way to expand forest resources, speed up the recovery and development of various benefits of forests and meet the needs of national economic construction.