Study On Ecological Effiency Evaluation Of Public Welfare Forest In Jinyun County

This paper selected Jinyun County, Zhejiang Province as the main research object, which is knownas the “eight parts mountain, one part water, and one part farmland”. Since2000, Jinyun County havestarted to construct the ecological public welfare forest, and it has enlarged to64720mu today from theoriginal limitation of30333.33mu, accounting for53.69%of the total forests of Jinyun County. In2010,Jinyun County also conducted the construction of dynamic monitoring system on the importantecological forests at the county level and had initially set up117orientation monitoring systems whichare comprised by the forest vegetation monitoring classes. The main contents of monitoring involved inthe forest resources situation, forest vegetation types, forest biomass, forest soil, the forest hydrology,forest microclimate, forest plants species diversity, etc.This paper firstly conducts the assessment on forest and ecological public welfare forest in JinyunCounty with the related theory and evaluation index system in Assessment of Forest Ecological Servicesin China, mainly takes the forest resource sample investigation, small classes second investigation andfixed small class investigation in ecological public welfare area. At the same time, it also takes specialinvestigation on forest biomass, forest soil, forest plants species diversity, etc. Based on the monitoringfigures, this paper has a systematically and comprehensively measure on the material figures ofecological service functions of the ecological public welfare forest in Jinyun County, including the sixfollowing eco-service function, water conservation function, soil and fertilizer protecting function, soilimprovement function, forest carbon fixing and oxygen releasing efficiency, forest nutrientsaccumulating function, species conservation function, etc. So as to laid the data base for furtherscientifical estimate on the value of the forest ecological system.The research shows that in2001-2010, the total biological amount of ecological public welfareforest plants in Jinyun County is3.2649million t, net biomass is985000t, water conservation is336million t, the reducing amount of soil erosion is11million t, the absorbing amount of carbon dioxide is1.6054million t, the oxygen releasing amount is1.1721million, the net increasing carbon storageamount is440500t and the net increasing energy storage amount is18.764billion j. In a decade, the total accumulative ecological efficiency reaches to11.93billion yuan, including oxygen releasingefficiency of2.767billion yuan, water conservation efficiency of2.757billion yuan, biodiversityprotection value of1.84billion yuan, soil-fixation efficiency of1.299billion yuan, solid carbonefficiency of1.244billion yuan, forest tourism efficiency of1.076billion yuan, new storage value of425million yuan, forest protection efficiency of394million yuan and improving soil efficiency of128million, which are shown in a high-low order.