Population Dynamics Of Robinia Pseudoacacia In Different Plant Configuration In Antaibao Opencast Coal Mine Dump

The ecological reclamation area of the dump, which is belongs to the opencast coalmine named AnTaiBao, is divided into different plots by what plants and acacia are planted in it. Based on the quadrat survey on these plots, several indicators, such as population dynamics, community characteristics, species diversity of the plots, and the relationship between these indicators and soil factor have been studied. During the study period, many analysis methods of quantitative ecology were adopted, such as population statistics, indices of biodiversity and associated analysis.Using the static life table method, analysis of Robinia pseudoacacia and all ocation under different plant population and update rules.The Robinia pseudoacacia tree height and DBH growth dynamics of a linear equation fitting, found a significant correlation between the DBH and height. According to DBH/height ratio size of Robinia pseudoacacia structure level of different configuration mode, accordingly constructing life tables and drawing the curve of life. Research shows that:Robinia pseudoacacia and Ailanthus elm+Ailanthus altissima, Robinia pseudoacacia plantation two plots Robinia pseudoacacia population age of vertebral body was Pyramid typical, belonging to the growth of population, the number of rich reserve of seedlings and saplings,Robinia pseudoacacia+Pinus tabulaeformis. Robinia pseudoacacia populations on the whole is on two small and middle large spindle shaped, currently in stable condition; three configuration modes of Robinia pseudoacacia populations with DBH height increases, the two can be a linear equation fitting; Robinia pseudoacacia populations of the highest life expectancy will appear after the highest mortality level, and the maximum density values corresponding to minimum and death; three configuration modes of Robinia pseudoacacia population survival curve are Deevey-II; update the number of seedlings Robinia pseudoacacia+Pinus tabulaeformis>Robinia pseudoacacia+Ailanthus elm+Ailanthus altissima>Robinia pseudoacacia plantation; update the number of seedling Robinia pseudoacacia+ Ailanthus elm+Ailanthus altissima> Robinia pseudoacacia+Pinus tabulaeformis> Robinia pseudoacacia plantation; Robinia pseudoacacia mixed forest of Ailanthus elm with high survival rate, update the situation better, and community structure showed good stability of Robinia pseudoacacia forest model, the worst performance.Every configuration mode species composition are significantly higher than the initial restoration of species richness, the specific performance of Robinia pseudoacacia+Ulmus pumila+Ailanthus altissima, Robinia pseudoacacia+Ulmus pumila+Ailanthus altissima are the maximum number of species in the families, and the Robinia pseudoacacia+Pinus tabulaeformiss pecies plots the minimum number of families; diversity index measurement results show that different plant configuration mode, the size of the performance of community species diversity:Robinia pseudoacacia+ Ulmus pumila+Ailanthus altissima> Robinia pseudoacacia chunlin> Robinia pseudoacacia+Pinus tabulaeformis.Vegetation restoration and soil physicochemical properties affected bychanges in soil organic matter, total nitrogen, available potassium, Robinia pseudoacacia+Pinus tabulaeformis> Robinia pseudoacacia chunlin> Robinia pseudoacacia+Ulmus pumila+Ailanthus altissima, Available N: Robinia pseudoacacia+Pinus tabulaeformis> Robinia pseudoacacia+ Ulmus pumila+Ailanthus altissima> Robinia pseudoacacia chunlin, Available P:Robinia pseudoacacia>Robinia pseudoacacia+Ulmus pumila +Ailanthus altissima> Robinia pseudoacacia+Pinus tabulaeformis. Robinia pseudoacacia populations through various structural levels and soil factors related to the amount of survival analysis showed,400<H/DBH≤ 500 Robinia pseudoacacia with 20-40cm of soil organic matter content was significantly negatively correlated (p<0.01),other structural level Robinia pseudoacacia survival and soil factors not related to volume. Diversity and soil factors related analysis showed that, in addition to Shannon-Weiner index and 0-20cm soil available phosphorus content was significantly negatively correlated with soil (p<0.05), the richness index、Simpson index and The evenness index of Pielou were not correlated with soil factors.