| 造林贡献率定义及造林成效评价 |
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| 引用本文： | 张煜星. 造林贡献率定义及造林成效评价[J]. 林业资源管理, 2010, 0(1) |
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| 作者姓名： | 张煜星 |
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| 作者单位： | 国家林业局调查规划设计院,北京,100714 |
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| 基金项目： | “十一五”国家科技支撑计划项目专题“多源、多分辨率遥感森林资源信息快速提取技术研究”(2006BAD23B0201-3) |
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| 摘 要： | 造林成效定量评价具有很重要的意义。以造林贡献率的定义和算法作为造林成效评价的指标,根据8次森林资源调查资料和近60年全国造林面积数据进行分析,认为1950—2008年,全国累计造林面积26 137.92万hm2,人工造林累计成林面积增加,森林覆盖率10.44个百分点。但人工林成林后采伐和征占用达38.45%,保存面积为61.55%。60年全国造林贡献率平均为38.44%,最近15年造林贡献率平均为50.20%,造林成效正在逐渐提高。在造林立地条件较差,投入较低,采伐利用较大的情况下,我国人工造林取得较大成绩,人工林林产品供应在木材、林化工业和药用原料、食用产品、生态产品等方面,占有重要的地位。1950—2008年,60年森林采伐总蓄积量为154.52亿m3,获得木材总计92.71亿m3;其中采伐人工林蓄积量达15.41亿m3,占采伐森林总蓄积的10%,近5年已达到39.44%。
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| 关 键 词： | 造林贡献率 人工林 森林调查 |
Definition of Contribution Rate of Afforestation and Afforestation Benefit Evaluation |
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| ZHANG Yuxing. Definition of Contribution Rate of Afforestation and Afforestation Benefit Evaluation[J]. Forest Resources Management, 2010, 0(1) |
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| Authors: | ZHANG Yuxing |
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| Affiliation: | Academy of Forest Inventory and Planning/a>;State Forestry Administration/a>;Beijing/a>;100714/a>;China |
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| Abstract: | It will be practically significant to evaluate afforestation benefits by means of quantitative analysis.The paper analyzes the data in detail based on 8 forest resource inventories and the forest area planted over the past 60 years in the country.In the period from 1950 to 2008,the accumulative planting area reached 261.3792 million ha.The forest coverage has been increased by 10.44% by artifical afforestation but the rate of prevesed area is 61.55% of artifical adult forest area,and the percentage of fores... |
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| Keywords: | contribution rate of afforestation artificial forest forest resource inventory |
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