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我省原始林资源日趋枯竭 ,人工林资源尚处雉形 ,难以持续利用 ,对次生林的培育经营已被推至首位。而我省次生林总面积占有林地的５８ %以上 ,其中以杨桦林为主的次生林分占次生林总面积的３０%以上 ,因而在“天保”工程的重大措施中 ,对次生林分的综合经营已日益显著重要 ,如何
The resources of primary forests in our province are depleted. The resources of plantations are still in the shape of pheasants and are difficult to sustainably use. The cultivation and management of secondary forests has been pushed to the top. The total area of secondary forest in our province occupies more than 58% of the total forest area, of which the secondary forest mainly consists of birch, accounting for more than 30% of the total area of secondary forest. Therefore, in the major measures of “Natural Forest Protection” project, the comprehensive management of secondary forest is increasingly significant Important, how