论文部分内容阅读
国营朝阳县六家子林场地处大凌河流域中游,经营面积10万亩,其中河滩林业用地10040亩。河滩林优势树种为小叶杨(Populus simonii)。这万亩小叶杨大部分是建国初期至1965年前以埋干的方法营造的,由于品种老化、经营管理跟不上等原因,林木生长量低,21—34年生林分平均亩蓄积仅3.7m~3,大部分为低产林。为充分发挥河滩优势,改造低产林,建设速生林基地,我们从1985年6月到1986年8月,用一年多的时间,对万亩河滩的林业用地,进行了全面地调查研究和改造规划设计。在分析
State-owned Chaoyang County Liujiazi Forest Farm is located in the middle reaches of the Daling River Basin, with an area of 100,000 mu, of which 10040 mu are for forestry and forestry. The dominant tree species is Populus simonii. Most of this poplar is built by means of burying in the early years of the founding of New China until 1965. Due to the aging of varieties and the inability of management, the growth of trees is low and the average acreage of 21-34 years old stands only 3.7 m ~ 3, mostly low-yield forest. In order to give full play to the advantages of floodplains, transform low-yield forests and build fast-growing forest bases, we conducted a comprehensive investigation and research on the forestry sites of Wanmu River beaches from June 1985 to August 1986 with more than a year’s time Planning and Design. In analysis