【作者】 陈东升； 李凤日； 孙晓梅； 贾炜玮；

【Author】 CHEN Dongsheng;LI Fengri;SUN Xiaomei;JIA Weiwei;Research Institute of Forestry/Key Lab for Forest Tree Breeding,Chinese Academy of Forestry;School of Forestry, Northeast Forestry University;

【机构】 中国林业科学研究院林业研究所/国家林业局林木培育重点实验室； 东北林业大学林学院；

【摘要】 以黑龙江省落叶松人工林为研究对象,利用获取的调查数据,综合林分生长模型、动态规划模型等,以净现值和内部收益率为经济评价方法确定出落叶松大、中径材优化经营模式。研究结果表明:16地位级适合培育中径材,不同初植密度林分间伐3次就可以进行主伐;18地位级以培育大径材为主,密度4400株/hm2的林分需要间伐5次,而密度3300株/hm2的间伐4次就可以获得目的材种;20地位级也主要培育大径材,经过间伐4-5次后,将获得最大的经济效益。全部优化经营模式内部收益率均在15%以上。本研究为提高落叶松人工林经营水平奠定理论基础。更多还原

【Abstract】 Using the data of Larix spp plantations in Heilongjiang province, based on stand growth models, dynamic programming models,and so on. Using the present net worth and the internal rate of return as economic evaluating method, The optimal management mode of large and medium diameter timber in Larch plantation were selected. The results showed: the middle diameter timber was suited on 16 site index, the stands of different initial planting density were thinning 3 times, and then cut. Large diameter timber was suited on 18 site index, the initial density of the plants(4400N/hm2) were thinning 5 times and(3300 N/hm2) were 4 times,then can obtain objective timber. The 20 site index cultivated large diameter timber, after thinning 4~5 times, the stand will gain the maximum economic benefits. The internal rate of return was more than 15% in all mode. The results were theoretical basis for improving Larch plantation management.更多还原