Abstract:

Forest naturalness is a criterion to forest management, recovery and rebuilding. The simple and practical evaluation method and the comprehensive, easy operation and standard indicator system are the basis of forest naturalness quantitative evaluation. In order to study the forest naturalness quantitative evaluation method, this paper put forward a method based on the stand state by AHP and entropy weight method from 5 aspects of stand tree species composition, stand structure, tree species diversity, stands vigor and human disturbance degree, including 14 indicators,such as tree species number composition, tree species basal area composition, diameter structure, trees distribution pattern, tree species segregation, dominance index of climax species, forest layers structure, tree species diversity index, tree species evenness index, stand regeneration, stand crown density, cutting intensity and quantity and the dead trees quantity, and so on. Eight typical forest types were selected as example in Xiaolong Mountain, and the forest naturalness was evaluated with the fixed plot and sample survey data by combining the method of AHP and entropy weight method. The evaluation result was in an order of little disturbance Quercus aliena natural forest (0.839) ＞clear cutting natural recovery Quercus aliena natural forest (0.752)＞selective cutting natural recovery Quercus aliena natural forest (0.646) ＞zonal cutting shrub planting Pinus armandii (0.546)＞zonal cutting shrub planting Pinus tabulaeformis (0.484) ＞overall cutting shrub planting Pinus armandii (0.483)＞overall cutting shrub planting Pinus tabulaeformis (0.459) ＞overall cutting shrub planting Larix kaempferi (0.317).

Key words: stand state, forest naturalness, evaluation, indicators system, Xiaolong Mountain