Ecosystem Services Evaluation Of Seabuckthorn Plantation In Soft Rock Region

Forest ecosystem is one of the basic unit of nature, which not only provides mankind with a variety of production and living materials, but also creates and maintains the security system of life on the earth, it is the foundation of humans and a variety of biological’s survival and development.Forest ecosystem services and their value evaluation is an important way to achieve ecosystem science management and sustainable use of natural resources.In this paper, theoretical analysis, frequency analysis, expert advice were used to build evaluation index system of seabuckthorn plantation ecosystem services in soft rock region.The evaluation index system included five criterias, seven elements and fifteen indexes.Five criterias were soil conservation, water conservation,nutrients accumulation,biodiversity conservation and forest protection.seven elements were fixed soil, maintain soil fertility, water regulation, water purification, etc.Fifteen indexes were soil erosion modulus, soil organic compounds content,rate of soil nitrogen fixation, etc.Then Empowered the evaluation index system by subjective and objective methods:analytic hierarchy process, G1method,variation coefficient method,and game theory was applicated to determine the weights of different methods in the combined weights model.The results showed that, rate of soil nitrogen fixation,root soil layer storage capacity.rate of soil potassium fixation,plant species richness,soil erosion modulus were larger than other indexes in the comprehensive weights.Quality evaluation results of seabuckthorn plantation ecosystem services in soft rock region showed that, seabuckthorn plantation ecosystem services were in levels of grade III and grade IV in2010and2007, and were in levels of grade IV or grade V in2004and2001.Evaluation results of economic value show that,the total ecosystem services value of soil conservation, water conservation,nutrients accumulation,biodiversity conservation and forest protection were52.83×108yuan,9.34×108yuan,3.59×108yuan,21.78×108yuan and24.78×108yuan in the year of2010,2007,2004and2001.The order of economic value of seabuckthorn plantation ecosystem services was soil conservation>forest protection>biodiversity conservation>water conservation>nutrients accumulation.The order of economic value of seabuckthorn plantation ecosystem services in different areas was Dongsheng City>Zhun Ge’er Banner> Fugu County>Yijinhuoluo Banner> Dalate Banner>Hangjin Banner. The order of unit area economic value of seabuckthorn plantation ecosystem services in different year was2010>2007>2004>2001.