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《Journal of Mountain Agriculture and Biology》 2017-04
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Study on the Quantitative Characteristics and Health Index of the Natural Restoration Process of Karst Vegetation in Maolan Nature Reserve,Libo County,Guizhou Province

AN Ming-tai;YU Li-fei;WANG Jia-guo;YANG Rui;CHENG Zheng-ren;College of Forestry,Guizhou University;College of Life Sciences,Guizhou University;Management Department of Maolan Nature Reserve;  
In order to reveal the quantitative characteristics and health index of vegetation restoration process in Maolan Karst areas,six stages of the natural restoration process of degraded Karst forest in Maolan National Nature Reserve were selected as research object. Based on 10 quantitative indexes,the organization,energy and stability of the community in each stage were analyzed for the quantitative characteristics and health index. The results showed that: 1) The height and density of herbs were the largest in stage I,and the number of shrubs was maximized in stage V,reaching 5174 stems in an area of 900m~2. 2) The level of community biomass was significantly different in the process of succession; the biomass of woody plants and the whole community showed an increasing trend,and the utilization ratio of solar radiation was the highest at the building layer of each stage. 3) Tree layer diversity index,ecological dominance index and stability coefficient showed a decreasing trend,and declined fast at stages IV-V and then slowly stabilized; while those of herb layer and shrub layer varied. 4) With the positive succession of vegetation,the health index of tree layer was up,that of shrub layer was a single peak type,and that of herb layer was a declining type. 5) The contribution rate of the herb layer decreased,that of shrub layer was single peak type,and that of tree layer increased.
【Fund】: “十三五”国家重点研发计划课题(2016YFC0502604);; 贵州省应用基础研究重大项目(黔科合JZ字[2014]2002)
【CateGory Index】: S718.5
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