The relationship between plant community and soil factors in spoil bank of coal mine under different reclamation modes

摘要

This paper selected six sample sites,which were taken by quadrate method.There were the comparative study of plant community and soil factors in reclamation spoil bank,no reclamation spoil bank and the original vegetation.According to the effective important value,we obtained the original data matrix of 228 × 74 sample-specie and 228 × 11 sample-specie environmental factors.8 plant communities were divided by TWINSPAN method.By analysis and verification of DCA,these results are consistent with those of TWINSPAN.DCCA analysis showed that two factors of soil organic matter and soil density affected the plant community distribution,structure and composition.In the process of community succession,Populus albavar.pyramidalis Bunge,Medicago sativa L.selected for reclamation had not been completely retained.Calamagrostis epigeios (L.) Roth became the dominant species.Compared with the original community,the community species composition of spoil bank was simple.The existing communities were neither the designed patterns nor the original structure of communities.