摘要
针对我国森林保护土壤的生态价值,用机会成本法、影子价格法和替代工程法,对我国森林生态系统在减少土地废弃、土壤养分流失及泥沙淤积等方面的价值进行了估算。结果表明:我国森林每年减少土地废弃的总经济价值为6亿2414万元;每年减少的土壤N、P、K损失的经济价值为4538亿7240万元;每年减少淤积泥沙的经济价值为13亿7545万元。以森林为主的森林生态系统每年减少土壤侵蚀的总经济价值为4558亿7200万元。我国主要森林生态系统保护土壤服务功能价值大小顺序为:亚热带>热带>温带草原>寒温带>温带>温带荒漠>暖温带>青藏高原。我国亚热带土壤保持量最大,为32亿8704万t/a;温带荒漠最小,为2亿6214万5000t/a。
The value of soil conservation of forest is the important part forest. Aiming at economic value of soil conservation of forest in China, of environmental product value of the the value of reducing soil degradation, nutrient loss of soil and sediment deposition is calculated for Chinese forest ecosystem taking opportunity cost method, shade price method and substitution engineering method. The results show that total value of reducing abandoned soil is 624. 140 million/a in China, total value of reducing loss of N, P and K of soil is 453 billion and 872. 400 million/a, total value of reducing sediment deposition is 1 billion and 375.45 million/a and total value of reducing soil erosion is 455 billion and 872. 000 million/a. The value order of protecting soil function in Chinese forest ecosystem is subtropical zone 〉 tropical zone 〉 warm temperate grasslands 〉 cold temperate zone 〉 temperate zone 〉 temperate deserts 〉 warm temperate zone 〉 Tibetan Plateau zone. The maximum quantity of soil conservation are 3 billion 287. 040 million t/a in subtropical zone, and the minimum quantity of soil conservation is 262.145 million t/a in temperate desert.
出处
《中国水土保持科学》
CSCD
2005年第3期16-21,共6页
Science of Soil and Water Conservation
基金
国家重大基础研究前期专项"我国森林生态系统服务功能及其价值评估"项目(2003CCB00500)
国家"十五"科技攻关项目"都市重要水源区水源涵养型植被建设技术研究与示范"(2001BA510B0202)
关键词
中国
森林生态系统
土壤保护
水土流失
生态环境
forestry ecosystem
ecosystem services function
soil conservation
value evaluation
