当前,黑龙江省森工林区正处于森林资源危机,企业经济危困的“两危”时期。“两危”的根本是森林资源的枯竭,而发展速生丰产林是迅速扩大与恢复森林资源最有效的途径.改培型速生丰产林是在集约经营区和常规经营区内的天然林与人工混交林及已郁闭的人工林施加丰产措施,提高单位面积产量,缩短培育周期,使其达到速生丰 At present, Heilongjiang Forest Industrial Zone is in a “crisis of two crisis” period when the forest resources crisis and the enterprise economic crisis occur. The root of “two dangers” is the depletion of forest resources, and the development of fast-growing and high-yielding forests is the most effective way to rapidly expand and restore forest resources.Reforming and cultivating fast-growing and high-yielding forests are natural forests and man-made plants in the intensive operation area and conventional operation area Mixed forests and closed plantations have been imposing high yield measures to increase yield per unit area, shorten the incubation period, to achieve rapid growth