Zhang Zhen, Gao Jin-Quan, Wei Chao-Fu
Department of Management Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China.
Ying Yong Sheng Tai Xue Bao. 2010 Mar;21(3):723-33.
This paper quantitatively described the changes of agroecosystem functions before (2003) and after (2007) the implementation of Gaolong land consolidation project in Hechuan of Chongqing. Engineering design and shadow price were integrated to quantify the effects of the project on the functions, and cost-benefit analysis was used to further explain the economic meanings of the functions, and to analyze the changes of the agroecosystem services value under effects of the project. Compared with that before the land consolidation, the agroecosystem services value after the land consolidation was somewhat improved, with the largest increment of nutrient cycling function and the smallest change of soil conservation function. In the implementation of the project, the changes of the agroecosystem services value induced by farmland water conservancy, field road building, and land-leveling engineering mainly manifested in the change of disturbance function. From the 7th to 35th year after the project, the cost benefit would have a rapid increase, and tended to be stable after then, giving a weak ecological pressure and little services value loss, and benefiting the improvement of regional ecological environment.
本文定量描述了重庆合川高龙土地整治项目实施前（2003年）后（2007年）农业生态系统功能的变化。将工程设计与影子价格相结合来量化项目对功能的影响，并采用成本效益分析进一步阐释功能的经济意义，分析项目影响下农业生态系统服务价值的变化。与土地整治前相比，土地整治后农业生态系统服务价值有所提高，其中养分循环功能增量最大，土壤保持功能变化最小。在项目实施过程中，农田水利、田间道路建设和土地平整工程引起的农业生态系统服务价值变化主要体现在干扰功能的变化上。项目实施后第7年至第35年，成本效益将快速增长，之后趋于稳定，生态压力较弱，服务价值损失较小，有利于区域生态环境的改善。
