中文摘要：

从树种组成、林分结构、树种多样性、林分活力和干扰程度5个方面选择树种（组）株数组成、树种（组）断面积组成、径级结构、林木分布格局、树种隔离程度、顶极树种优势度、林层结构、树种多样性指数、树种均匀度指数、林分更新状况、林分蓄积量、林分郁闭度、枯立木状况及采伐强度和次数14个指标,采用层次分析法和熵权法相结合的方法,提出基于林分状态特征的森林自然度评价方法,并以甘肃小陇山林区8类典型林分类型为例对该评价方法进行验证。各类林分自然度表现为：未受人为干扰的锐齿栎天然林（0.839）〉皆伐后天然恢复锐齿栎天然林（0.752）〉择伐后自然恢复锐齿栎林（0.646）〉带状割灌改造华山松林（0.546）〉带状割灌改造油松林（0.484）〉全面割灌改造华山松林（0.483）〉全面割灌改造油松林（0.459）〉全面割灌改造日本落叶松林（0.317）。

英文摘要：

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）.