The Influence of Phyllostachys edulis Expanding into Evergreen Broadleaf Forest on Soil Property and Its Related Analysis
[Objective] To investigate the influence of Phyllostachys edulis expanding into evergreen broadleaf forest on soil property.[Method] The evergreen broadleaf forest,the mixed forests with bamboo and broadleaf tree in the ratios of 2∶8 and 8∶2 and the Ph.edulis pure forest at Dagangshan Forest Ecological Station,Jiangxi Province,as sampling sites,the soil properties and water features such as soil organic carbon,bulk density,soil porosity,soil water retaining capacity and soil water storage were studied.[Result] During the process of Ph.edulis expanding,the soil organic carbon content of evergreen broadleaf forest increased at initial and then decreased.Correlation analysis showed that the soil organic carbon was extreme significantly correlated with non-capillary water holding capacity and existing storage capacity,and significantly correlated with soil bulk density and total porosity,the in teraction of them affected the expansion process.[Conclusion] Soil bulk density,porosity and water retaining capacity in evergreen broadleaf forest were superior to that in mixed forests and Ph.edulis pure forest,providing the condition for shoot germination after invasiou.In the success process from evergreen broadleaf forest to pure Ph.edulis forest,the soil physical properties and water retaining capacity in the soil depth of 10 ～ 60 cm improved,while the organic carbon content reduced to the lowest in all the forests.Although a large number of rhizome in the soil optimized the soil physical properties,Ph.edulis consumed soil carbon for asexual reproduction,which combined with selective cutting and digging bamboo shoots and other artificial intederence,lowering the soil organic carbon of pure Ph.edulis forest.Therefore,the improvement of soil organic carbon content,soil structure and water characteristics may be an important ecological strategy to control the expansion of Ph.edulis and maintain ecosystem stability in the future.
Phyllostachys edulis expansionsoil organic carbon contentsoil physical propertiessoil water properties
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NSTL
万方数据
维普
