Relying On The Chengde North Ditch Forest Forest Park Forest Naturalness Evaluation Research

After entering the21st century, with the improvement of the people material life level,the quality of living environment also have higher requirements.People yearning nature,longing for nature, but in the city landscape environment created by doping the too muchartificial trace, these feelings of landscape are a far cry from what come from the realnature.City park green space cannot have satisfied people pressing into natural desires.Inthis case,In forest resources as the main body, with good natural and cultural landscape,closer to the nature of the forest park arises at the historic moment.Most of the forest parkis on the basis of the state-owned forest farm construction,Chengde north ditch forestwithin the jurisdiction of mulan paddock tourist area of forest resources is rich,However,since the national implementation of "natural forest logging ban" and"classificationmanagement",Forest farm have been dominated by cutting timber production managementmode has received great impact,In the new situation, the transition to Forest Park northditch forest has been crunch time.Forest Park is very high to the natural forest, North Ditchof the forest naturalness, transition to Forest Park, how the potential transformation, is stilla problem to be solved urgently.In this study, the north ditch forest4forest area of1104forest subcompartment as theresearch object, using the analytic hierarchy process to construct the north ditch forestnaturalness evaluation system, evaluation of the north ditch forest community of naturalforest, according to the evaluation results on the north ditch forest transformation forForest Park’s potential analysis, combining the analysis of the influence factors on thedegree of natural, proposed the transformation of North Ditch forest of different naturalgrade and different forest zone to the Forest Park near natural forest managementcountermeasures, in order to provide reference for the north ditch forest near natural forestmanagement.The main results are as follows:(1)Based on the basic characteristics of community forest naturalness evaluation fromcan reflect the forest community succession of community, community structure, thedegree of interference,Selected indicators of naturalness evaluation index system,Thesixteen Index layer is Mixed forest,Pure forest,The proportion of dominant tree species,Thenumber of species of trees,the young forest,Middle age forest,Near mature forest,Themature forest,Mature forest,Single forest,Compound storied forest,Protection forest,Special purpose forest,Timber forest,Natural forest,Plantation.Using the method of analytichierarchy process to determine the weight of each index to establish The natural degreeevaluation model and Grade standard.The basic data are standardized, into the forestsubcompartment calculation model of natural degree and regional forest naturalnessevaluation model.According to the natural degree evaluation grade standard,get results thenorth ditch forest naturalness evaluation.(2)North Ditch evaluation results show that:North Ditch forest naturalness level is lowin general.North Ditch forest natural value is0.246, between0.2~0.4,The natural degree ofevaluation results for the4grade, is a semi artificial community.Among them,The naturalvalue of Donggou、Beigou、Yaolugou are between0.2~0.4,the natural degree of evaluationresults for the4grade, is a semi artificial community;The natural value of is the lowest,is0.192,between0.2~0.4,The natural degree of evaluation results for the5level, whichbelongs to the artificial community.(3)From the north ditch forest naturalness evaluation results, the transition has thecertain difficulty for the Forest Park.(4)The factors of forest naturalness of different impact analysis, the results are asfollows:Main causes of the north ditch forest naturalness level is low is that the lack of themixed forest area, level structure is single,the young and middle-aged forest accounted forabsolute advantage,the proportion of the protection forest is very low.Influence factors of4forest area of forest naturalness are slightly different.The influence factors of Donggouare that the young forest, middle age forest dominant and mature forest, mature forest andserious lack of and hierarchy single;The influence factors of Beigou are the young forest,middle age forest dominant and compound storied forest and protection forest are seriousshortage of space;The influence factors of Habaqi are mixed forest, mature forest, matureforest and secondary forest area are seriously insufficient, the proportion of dominant treespecies and tree species number is low;The influence factors of Yaolugou are that theyoung forest, middle age forest dominant and compound storied forest, protection forest,natural forest area is too small, the proportion of dominant tree species and species numberis too low.(5)Combined with the analysis of the evaluation results and the nature of differentinfluencing factors,put forward the Near natural forest management countermeasures northditch forest of different natural grade and different forest region.(6)The construction of Forest Park is rich in natural resources as the foundation, fromnature to approach, to create infinite close to the natural landscape as the goal, therefore,whether it is state-owned forest farm to Forest Park transformation needs of near naturaltransformation, the existing Forest Park still need to continue to close to naturemanagement, in order to make people like the nature of the objective.