| This study was base on a research platform,which was a fixed monitoring sample plot of revegetation area in Antaibao dump of open-pit.Ministry of Land and Resources consulted the technical specifications(http//www.ctfs.si.edu/)that established by CTFS(Center for Tropical Forest Science)and formed this sample plot in 2010a.In 2015a,A field investigation was conducted on the artificial forest ecosystem of 4 restoration patterns in the sample plot,with the monitoring data from research group in 2010a,we analyzed the composition of plant community,age structure,α diversity of community,biomass of arbor,habitat soil quality and other dynamic characteristics.Using analytic hierarchy process,9 evaluation factors and weights were determined and the health assessment system in Antaibao plantation ecosystem was established.At last,the health status of plot in artificial forest ecosystem in 2010a and 2015a was evaluated using fuzzy synthetic evaluation.The results are as follows:1)Dynamic of community characteristics:Compared with the cruising data in 2010a,in 2015a,the community characteristics of different plots presented as follow:In general,the density of every population showing a downward trend.In 2015a,average diameters at breast height of all surviving individuals were greater than in 2010a.In 2010a,besides the SV plot,the diameter class structure of all individuals in every plot was presented as ’inverted J’,The diameter class structures of other3 plots are obviously single-peak type,In various restoration modes,the diversity of herbaceous plant is higher than woody plant:During vegetation were recovering,’ Robinia + Pinus recovery mode’ was good for the accumulation of biomass of arbor species.Besides,from 2010a to 2015a,’Robinia + Pinus recovery mode’ and ’Robinia recovery mode’ both provided higher contribution rate to the accumulation of arbor species during waste dump was rebuilt.2)Dynamic of plantation soil equality:Soil nutrient content of ecological reclamation area of open-pit mine in Antaibao was in the range of moderately deficient.In 2010a and 2015a,there were little change in soil quality.All the factors were in medium variation degree,except pH value and content of available K,which were in the low variation degree.3)Establishment and evaluation of index system:2 subsystems and 9 evaluation indexes were including when built the health assessment system of waste dump of open-pit mine in Antaibao.Evaluation indexes were age structure of arbor,species richness,Shannon-wiener diversity index,Pielou evenness index,biomass of arbor species,vegetation coverage,soil erosion modules,soil bulk density and soil organic matter.There were 5 evaluation degrees,including pathological,general,pathological,sub-healthy,healthy and very healthy;with the weight coefficient(according to the order of indexes)respectively:0.074,0.188,0.060,0.067,0.236,0.123,0.111,0.071,0.139.Using fuzzy synthetic evaluation evaluated the health condition of plantation in waste dump of open-pit mine plantation in Antaibao.And the result were as follow:plantation system in plot SⅢ had the best healthy condition,plot SⅣ and SⅠ were the second best and plot SⅤ was under sub-healthy condition. |
