Evaluation On The Forest Resources And Its Multi-functional Value Of Yanqing County In Beijing

Forest is the main part of terrestrial ecosystems, which could offer ecological value, economic value and social value. The modern forestry, which protects and nurtures the forest, develops the ecological construction, can improve the environmental quality and people's quality of life, and promote economic and social sustainable development. Multi-functional forestry is the sublimation of forestry development idea, and is also the core and the essence of modern forestry. Strengthening the research of multi-functional management of forest resources could improve the multi-functional comprehensive quality of forest resources, bring multi-functional value into play, so as to promote the construction of ecological civilization,social and economic sustainable development.Yanqing county is located to the northwest of the capital, and it is also the ecological conservation area of the city. Its ecological condition not only affects the local ecological environment but also affects the ecological environment of Beijing. Based on the second forest resource inventory data from 1999 to 2009, this thesis analyzed quantitative changes of forest resources, and quality status. Then based on the multi-functional forestry theory, and with the surrogate market approach, simulated market approach, direct market method and other methods, the thesis estimated the ecological value, economic value and social value to give advices for the multi-functional management of the forest in Yanqing.Through the analysis, this paper drew the following conclusions:(1) With SWOT analysis method, the thesis analyzed strengths, weaknesses, opportunities and threats of the development of multi-functional forest in Yanqing. The advantages are abundant forest resources, rich eco-tourism resources and considerable economic value. The weaknesses are adverse natural environment, the extensive mode of operation, ineffective forest utilization, low impact management level of economic forest and ecological forest, and low economic conditions. The opportunities are the higher attention and good social environment.And the local government also attached great importance to forestry development.The threats are lack of basic skills of forestry workers, imperfect forestry management system, and geographical disadvantage.(2) Through the assessment of forest resources, the forestry development of Yanqing maintains a good state, and compared to the second forest resources inventory data in 1999, the forest volume in Yanqing increased 594 431.84m3.The increasing rate is 39.6%. And the forest thickness increased from 0.69mm to 0.97mm. It showed that the growth of forest in Yanqing kept a good status. But on the whole, the quality of forest resources is relatively low. The stocking per unit area is only 19.59 m3/hm2.The tree species of forest resources,and spatial structure were not reasonable. And the forest stayed high proportion of young-medium age.(3) Through the evaluation of the value of forest asset and forest stock from 1999 to 2009, these two values have greatly increased. It indicated that the economic development of Yanqing had not sacrificed the ecological environment, whereas it paid much attention to the protection of ecological environment.(4) Through the estimation of multi-functional value of forest, ecological value of forest resources of Yanqing in 2009 reached 5.56 billion yuan. The economic value of output from forest is 0.21 billion yuan, and social value is 1.18 billion yuan, in which the ecological value accounts for the most part. The ecological value accounted for 80.05% in the three major values, and the economic value accounted for 2.95%, and the social value accounted for 17%.(5) According to estimation results, it suggested the quality of the forest was the fundamental material premise for the comprehensive value.The forest resources of Yanqing county keeps high quality which also brought high ecological value. And this keeps in line with the construction concept and target of yanqing county.(6) In the future, the management policy of forest resources in Yanqing is to improve the quality and overall value. It should adopt close-to- nature forest management strategy to adjust the structure of forest types and species, and improve the accumulation and productivity per unit area of forest. Based on the current forestry classified management, it should actively develop forest ecological, economic and social value to improve the comprehensive value of forest resources. (7)Finally, this thesis hopes to establish the theory of quantitative prediction and assessment of forest resources to promote the progress of multi-functional forestry.