Abstract:

In order to study woodland ecological adaptability evaluation mechanism of ecological fragile region, based on the survey aiming to the typical sample plots totally 41 operation area of Nandan county, Guangxi, comprehensive consideration of some factors relating closely with woodland ecological adaptability such as landform and physiognomy, soil and vegetation, etc, woodland ecological adaptability of Nandan county was evaluated intangibly synthetically by using ARCGIS analysis method orgnizing and calculating the space data,combining with the AHP method reseaching various evaluation factors Weight and choosing suitable subordinate function and fuzzy algorithm. The results showed that the grade proportion scheduling was as follows: II grade (45.62%)＞IV grade (27.84%)＞V grade (17.61%)＞II grade (8.93%)＞I grade (0%), the overall membership value of 3.5413, in IV grade; the results also showed that the effecting factors scheduling was as follows: slope＞gravel content＞elevation＞soil thickness＞canopy density＞aspect＞shrub coverage＞herb coverage. Meanwhile, according to the research results, the main reasons of woodland ecological adaptability for poor and the focus of ecological restoration and reconstruction were analyzed.