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作 者 ：肖红生,王 勇,骆世明.

期 刊 ：中国生态农业学报 2008年 16卷 5期 页码：1225-1229

关键词：农林生态系统；土壤肥力；生态服务功能；核算方法；

Keywords:Agro-forestry ecosystem, Soil fertility, Function of ecosystem service, Assessment method,

摘 要 ：阐述了农林生态系统保护SOM和N、P、K含量等土壤肥力资源的生态服务功能，提出了功能核算方法。该功能的实现有两种途径：一是通过森林群落和农作物的地上部凋落物，以及地下部生物体残留进入土壤的自然途径；二是施用化肥和有机肥的人工途径。各种农林生态系统增加土壤肥力资源的过程相对固定，数量基本稳定，因此可以分“物流型生态服务”和“库存型生态服务”来分别核算这种生态服务功能，并要根据不同区域和生态类型来确定核算公式和具体参数。对2005年佛山市农林生态系统增加土壤肥力功能的核算结果是，当年增加土壤肥力的功能价值为0.832亿元，现存土壤肥力资源的功能价值为19.828亿元。

Abstract:Advances in the soil fertility （including SOM and N，P，K） conservation functions of agro-forestry ecosystem and their assessment methods were summarized and key operational assessment principles proposed. The agro-forestry ecosystem function to conserve soil fertility in the two ways: i） natural soil fertility, including tree and crop residue, underground biome remaining in the soil; and ii）artificial chemical and organic fertilization of the soil. For assessment purposes, the functions were put into two categories－the flow-type eco-service（FE）, interpreted as enhancing soil fertility; and the storage-type eco-service（SE）, interpreted as sustaining soil fertility. The formulas and assessment parameters are inherently different for specific regions and sub-ecosystems. Using this approach, the soil fertility conservation function of Foshan agro-forestry ecosystem was assessed for year 2005; the FE value is estimated at 83.2 million yuan and SE value calculated at 1 982.8 million yuan.

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