杭州湾南岸农业生态系统土壤保持功能及其生态经济价值评估  

Soil Conservation of Agro-ecosystems and Its Eco-economic Value in South Coast of Hangzhou Bay

作　　者：李加林[1] 童亿勤[2] 杨晓平[2] 许继琴[3] 张殿发[2] 

机构地区：[1]中国科学院地理科学与资源研究所全球变化信息研究中心,北京100101 [2]宁波大学人居环境研究所,浙江宁波315211 [3]宁波大学商学院,浙江宁波315211

出　　处：《水土保持研究》2005年第4期202-205,共4页Research of Soil and Water Conservation

基　　金：宁波市社科规划课题(G2004A11);宁波市科技局项目(2002C10026);浙江省社科联年度课题(03N55)

摘　　要：文章运用土壤通用流失方程(USLE)研究了杭州湾南岸农业生态系统的土壤保持功能,并评价了其经济价值。研究表明,由林地、水田和旱地组成的杭州湾南岸农业生态系统的土壤保持量为5.67×105t/a,其经济价值为20.35×105元/a,其中减少土壤废弃的经济价值为12.33×105元/a,保持土壤养分价值为4.92×105元/a,减少泥沙淤积价值为3.10×105元/a。<Abstrcat>Based on the Universal Soil Loss Equation (USLE), the authors analyse the function for soil conservation of agro-ecosystems and its eco-economic value in south coast of Hangzhou bay. The results indicate that the quantity of soil conservation in research area is 5.67×10~5 t/a. The total economic value of soil conservation was estimated to be 20.35×10~5 yuan/a.The economic value of reduction of soil disuse, protection of soil fertility and decrease of soil deposit are 12.33×10~5 yuan/a, 4.92×10~5 yuan/a and 3.10×10~5 yuan/a, respectively.

关 键 词：土壤侵蚀 土壤保持 通用土壤流失方程 杭州湾南岸 

分 类 号：S157[农业科学—土壤学] S181[农业科学—农业基础科学]