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1、第35卷第9期中南林业科技大学学报Vol.35No.92015年9月JournalofCentralSouthUniversityofForestry&TechnologySep.2015Doi:10.14067/j.cnki.1673-923x.2015.09.018http://qks.csuft.edu.cn广西凤山县林地石漠化指数研究1211吕飞舟，石程远，李典军，吕勇（1.中南林业科技大学，湖南长沙410004；2.广西林业设计院，广西南宁530011）摘要：为了准确评定林地石漠化等级，以广西凤山县林地为案例，提出了林地石漠化指数这一定量新指标来
2、量化评价林地石漠化的程度。根据林地的基岩裸露率、植被综合覆盖度、坡度、土层厚度4个指标对林地石漠化评价的重要程度，釆用专家打分得到重要性比较结果，釆用层次分析法计算得出各个指标的权重值。结果表明：基岩裸露率、植被综合覆盖度、坡度、土层厚度4个指标的权重值分别为0.5534、0.2841、0.0629、0.0996，表明林地石漠化指数各指标重要性最大的是基岩裸露率，其次是植被综合覆盖度，然后是土层厚度、坡度；无石漠化、潜在、轻度、中度、强度、极强度各等级的石漠化指数区间分别为[0，0.161]、（0.161，0.352]、（0.352，0.418]、（0.4
3、18，0.720]、（0.720，0.868]、（0.868，1]。利用该指数能够实现对广西凤山县林地的石漠化程度等级的量化评定。关键词：林地石漠化；石漠化指数；广西凤山县中图分类号：S728.9文献标志码：A文章编号：1673-923X(2015)09-0104-05StudyonrockydesertificationindexforFengshancountyofGuangxiprovince1211LVFei-zhou,SHICheng-yuan,LIDian-jun,LVYong(1.CentralSouthUniversityofForestr
4、yandTechnology,Changsha410004,Hunan,China;2.GuangxiForestryPlanningInstitute,Nanning530011,Guangxi,China)Abstract:Inordertoaccuratelyassesstherockyforestlanddesertificationgrade,bytakingtheforestlandinFengshancountyofGuangxiprovinceasastudiedobject,anewquantitativeindicatorindexof
5、rockydesertificationwasproposedtoquantifytherockyforestlandevaluation.Accordingtotheimportancedegreesoffourindexes(bedrockexposedrate,comprehensivevegetationcoveragerate,slope,soilthickness)toevaluationofrockydesertification,thecomparisonresultsofimportancewasobtainedbyusingexpert
6、scoringmethod,andtheweightvaluesofeachindexwerecalculatedbyusinganalytichierarchyprocessmethod.Theresultsshowthattheweightvaluesofbedrockexposedrate,comprehensivevegetationcoveragerate,slope,soilthicknesswere0.5534,0.2841,0.0629,0.0996respectively,indicatingtheimportanceofindicato
7、rofallindicatorswasthebedrockexposedrate,followedbycomprehensivevegetationcoveragerate,soilthickness,slope;Andtheindexintervalsofrockydesertificationindexofnorocky,potentially,mild,moderate,strengthandextremestrengthrockygradewere[0,0.161],(0.161,0.352],(0.352,0.418],(0.418,0.720]
8、,(0.720,0.868],(0.868,1]respectiv
