Forest Community Spatial Pattern And Dynamic Of Ecological Reclamation In Open Coal Mine In Semiarid Areas

July to September2010, we set4fixed plots in south dump of Antaibao open coal mine in ShuoZhou Shanxi Province, based on the investigation data, using point pattern analysis, static life stable and survival curve, this thesis gives an analysis on the quantitative characteristics, spatial distribution pattern of individuals at different developmental stages, population succession and development trend of the main trees in3allocation models (I:Robinia pseudoacacia×Pinus tabulaeformis;2:Robinia pseudoacacia×Ulmus pumila pumila×Ailanthus altissima;3:Robinia pseudoacacia) respectively. Results showed that:1、Robinia pseudoacacia seedlings take the aggregation distribution, saplings and adults almost present random distribution pattern in4plots; the Ulmus pumila seedings’distribution presents aggregation and random distribution in plot S I, SⅢ and SIV, while others are almost presenting uniform distribution and random distribution in plot S V. In addition, the number of Ulmus pumila seedlings is more, but the individual number of saplings is less; Owing to the number of Pinus tabulaeformis update individuals did not meet the minimum requirements of the sample of programita, this did not give a judgement on their spatial pattern, the Pinus tabulaeformis adults maintains a random pattern and appear uniform distribution in a small scale; The spatial distribution pattern of the Ailanthus altissima seedlings and saplings are almost the same, and appear aggregation distribution in a small scale, along with the increasing of the scales, the aggregation index gradually reduced and present random distribution.2、Through the analysis on the static life table and live curve of different configuration modes, it comes to that the Robinia pseudoacacia seedling quantity is sufficient, while lacking of young reserves in different configuration modes. Although there are lots of Ulmus pumila seedling individuals, but the mortality rate is extremely high and their update ability is poor, and they will gradually disappear in all of the plots. Though lacking of infant individual in Pinus tabulaeformis population, as long as going on with artificial raising to them in the future, then when they reach the mast-fruiting event age, we can create more suitable conditions for its seed germination, Pinus tabulaeformis populations can realize to update itself. Ailanthus altissima population also show insufficient in the number of seedling, if there is not enough forest gap, the growth of seedling individuals of Ailanthus altissima will be seriously affected and then gives further influence on the updates of Ailanthus altissima population.Through the analysis on the spatial pattern and the static life table of forest population, this paper gives a further explain on the the inner relationship between the plant species and the environment, and it also can forecast the tendency of the development and succession of the forest population, providing scientific criterion for species selection and management in the future.