不同密度的巨尾桉丰产示范林经济效果评价  

The Economic Effects Evaluation for High yield Eucalyptus Grandis × urophglla Demonstration Plantations in Various Density

作　　者：李志辉[1] 曾广正 谢耀坚 陈建华[1] 

机构地区：[1]中南林学院资源与环境学院,中国湖南株洲412006 [2]中国桉树研究开发中心,中国广东湛江524022

出　　处：《中南林学院学报》2000年第3期54-58,共5页Journal of Central South Forestry University

基　　金：国家重点科技攻关项目!"桉树纸浆用材树种良种选育及培育技术研究"( 96-0 11-0 1-0 3 )的部分内容

摘　　要：对湘南低山丘陵区 6年生不同密度的巨尾桉林分 ,按照国际惯例和生产实际情况 ,确定了经济效果分析指标 ,并进行了分析评价 .结果表明 :巨尾桉林分总产值高 ,其中中密度林分高达 44193圆·hm- 2 ;林分纯收入、纯利润、年均利润均相当高 ,这些指标同样以中密度林分最高 ,分别达 40 15 1,2 3 0 88和 3 848圆·hm- 2 ;在 3种不同密度的林分中 ,成本利润率分别达到 6.2 1,5 .71和4.90 ;各种密度的林分投资回收期均很短 ,为 3 .7～ 4.4a;产出投入比为 4.5～ 7.3 ;在 3种不同密度的林分中 ,净现值均很高 ,在 112 3 8圆·hm- 2以上 ,中密度林分高达 12 83 1圆· hm- 2 ;3种不同密度林分的内部收益率分别达到 62 .92 %,68.98%和 64 .3 9%;产品销售价格、生产成本和投资总额是影响成本利润率变化的主要因素 ,当销售价格上升 1%时 ,成本利润率将上升 0 .117,当生产成本上升 1%时 ,成本利润率将下降 0 .0 66,当投资总额上升 1%时 ,成本利润率将下降 0 .0 66;对我国桉树引种北缘区的湘南低山丘陵区 ,作为以生产矿柱材和纤维材为主要目的 ,兼顾生产薪柴的巨尾桉林 ,应将密度控制在 90 0～ 112 5株· hm- 2The main purpose of this article was to determine the analysis indicator of economic effects and make assess of six year old E.grandis × urophglla of different stock densities grown in the lower hilly land in Southern Hunan, according to international rules and producing practice. The results indicated that the gross output value of the E.grandis × urophglla is high. The gross output value of medium density stands was up to 44 193 yuan per hm 2 and the net income, net profit and annual profit were high too. For the above three indicators, the medium stock density's was the highest of all the three different density, too. They were respectively 4 015 yuan, 23 088 yuan and 3 848 yuan per hm 2. The cost profit ratio of the three stock density were respectively 6.21, 5.71 and 4.90. The stock payback period of investing was short. They varied from 3.7 years to 4.4 years. The output input ratio ranged from 4.5 to 7.3. The net present value of each stock density was high and it was above 11 238 yuan per hm 2. Especially,for the medium stock density, it amounted to 12 831 yuan per hm 2. The internal returning rates of the three stock density were more than 60%. They were respectively 62.92%, 68.98% and 64.39%. The main factors that affected the cost profit percentage were the price, product cost and the total investment. When the price was up 1%, the cost profit margin would risen by 0.117; with each 1% increase of investment ,margin will decreased by 0.066. The lower hilly area of southern Hunan was the north edge of the Eucalyptus introduction, so the stock density should be controlled around 900 to 1 125 stems per hm 2. The main purpose of production was to produce propwood and pulpwood, and took accord of enlarging the firewood area.

关 键 词：巨尾桉 经济效果 丰产示范林 引种 栽培 

分 类 号：S792.39[农业科学—林木遗传育种]