...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bangladesh Journal of Botany >Coupling relationships between plant community and soil characteristics in Canyon Karst region in south-west China
【24h】

Coupling relationships between plant community and soil characteristics in Canyon Karst region in south-west China

机译：西南峡谷喀斯特地区植物群落与土壤特征的耦合关系

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Plant community characteristics in Canyon Karst region in southwest China and analyze the couplingrelationships between plant communities and soil properties in different ecosystems have been explored.Eighteen plots (20 × 20 m) in six ecosystems (paddy field, dry land, grassland, shrubbery, artificial forest, andsecondary forest) in canyon karst region in south-west China are established. The species composition anddiversity characteristics of above mentioned ecosystems were investigated. To find the relationships betweenvegetation and soil properties, principal component analysis (PCA) and canonical correlation analysis (CCA)were carried out. Forty indices of plant communities and soil properties were chosen. The results showed thatwith the development of vegetation community succession, species diversity value of the herb layer was largerthan that of the shrub. The maximum value of species diversity mainly appeared in the secondary forest. TheCanyon Karst Region had high landscape heterogeneity, and different ecosystems had different dominantfactors. Species diversity was the dominant factor in karst fragile ecosystems, followed soil microbes and largeparticle aggregate organic carbon. CCA elucidated a close relationship between species diversity and soilproperties (organic carbon, total nitrogen (total P), available nitrogen, Al2O3, Fe2O3, bacteria, actinomycetesand soil microbial diversity). Thus, in vegetation improvement and management practices, it is necessary toconsider the heterogeneity of each factor as well as the relationship between vegetation and soil factors.
机译：探索了西南峡谷峡谷喀斯特地区植物群落特征，分析了不同生态系统中植物群落与土壤特性的耦合关系。在六个生态系统（稻田，旱地，草地，灌木，人工）中有18个样地（20×20 m）建立了中国西南峡谷喀斯特地区的原始森林和次生森林。研究了上述生态系统的物种组成和多样性特征。为了找到植被与土壤特性之间的关系，进行了主成分分析（PCA）和典型相关分析（CCA）。选择了40种植物群落和土壤特性指数。结果表明，随着植被群落演替的发展，草本层的物种多样性值大于灌木层。物种多样性的最大值主要出现在次生林中。峡谷喀斯特地区具有较高的景观异质性，不同的生态系统具有不同的主导因素。物种多样性是喀斯特脆弱生态系统的主要因素，其次是土壤微生物和大颗粒聚集的有机碳。 CCA阐明了物种多样性与土壤特性（有机碳，总氮（总P），有效氮，Al2O3，Fe2O3，细菌，放线菌和土壤微生物多样性）之间的密切关系。因此，在植被改善和管理实践中，有必要考虑每个因素的异质性以及植被与土壤因素之间的关系。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号