论文部分内容阅读
以燕山山地华北落叶松低质低效林综合改造技术模式为研究对象,利用经济财务分析方法对于不同经营措施投入产出进行分析评价。研究表明:不同经营措施下,经过改造的华北落叶松低效林与未经改造的低效林相比,其投资利润率、净现值均有所上升,而且从总体来看人工促进更新效果最好,净现值为15590.51元/hm2,其次依次为引进灌木为9952.99元/hm2,带状皆伐改造为5985.39元/hm2,群团状择伐改造为5290.05元/hm2,封禁促进植被恢复为1192.45元/hm2,未封禁的落叶松林仅为941.99元/hm2。通过不同措施比较,表明这几种措施不仅适宜于燕山山地低质低效林改造,同时在经济上也是可行的。
Based on the comprehensive transformation technology mode of low quality and low efficiency forest of Larix principis-rupprechtii in Yanshan Mountains, the paper analyzes and evaluates the input-output of different management measures by economic and financial analysis method. The results show that under different management measures, the investment profit rate and net present value of the transformed LARP-effective forests are higher than that of the un-modified low-efficiency forests, and the overall effect of artificial promotion is the most The NPV was 15590.51 yuan / hm2, followed by 9952.99 yuan / hm2 for introduced shrubs, 5985.39 yuan / hm2 for clear-cut bands and 5290.05 yuan / hm2 for group-like selective cutting. 1192.45 yuan / hm2, unlicensed larch forests only 941.99 yuan / hm2. Comparison of different measures shows that these measures are not only suitable for the transformation of low-quality and low-efficiency forests in Yanshan Mountains, but also are economically feasible.