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Effects of enrichmemt planting with native tree species on bacterial community structure and potential impact on Eucalyptus plantations in southern China

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Journal of Forestry Research 2022年第4期33卷 1349-1363页

作者： Yuxing Xu Chao Li Wankuan Zhu Zhichao Wang Lichao Wu Apeng Du Key Laboratory of soil and Water Conservation and Desertifi cation Combating of Hunan Province College of ForestryCentral South University of Forestry and TechnologyChangshaHunan 410004People’s Republic of China China Eucalypt Research Centre(CERC) Chinese Academy of Forestry(CAF)ZhanjiangGuangdong 524022People’s Republic of China Guangdong Zhanjiang Eucalyptus Plantation Ecosystem Research Station ZhanjiangGuangdong 524022People’s Republic of China

Multi-generational planting of Eucalyptus species degrades soil quality but the introduction of legumes can improve soil fertility and microbial ***,the effects of introducing non-legume native tree species on soil nutrients and bacterial community structure remain poorly *** study investigated the impacts of the conversion of third generation monoculture Eucalyptus plantations to mixed systems including Eucalyptus urograndis with Cinnamomum camphora(EC)and *** with Castanopsis hystrix(EH),on soil chemical and biochemical properties and bacterial community structure,diversity and *** generation *** plantations were the *** show that planting the third generation Eucalyptus led to a significant decrease in p H,organic matter,nutrient content,enzyme activities(invertin,acid phosphataes,and urease),and bacterialα-diversity compare to the ***,the mixed planting showed significant improvement in soil chemical and biochemical attributes and bacterialα-diversity,although the *** and *** planting had no ***(oligotrophic bacteria)were significantly enriched in third generation Eucalyptus and Eucalyptus+***,while proteobacteria increased significantly in the *** with *** *** relative abundance of multiple metabolic pathways increased significantly in the third generation Eucalyptus plantations whereas membrane transportrelated genes were enriched in soils of the mixed *** changes in bacterial community structures in the two mixed systems were driven by diversity,organic matter and acid phosphatase,while bacterial functions were affected by invertase,NO_(3)^(-)-N,diversity and *** results suggest that the transformation of successive monoculture Eucalyptus plantations into mixed plantations reduces the depletion of soil nutrients and enhances the ecological function of soil microorganisms.

关键词： soil chemical propertie Enzyme activity 16S rRNA amplicon sequencing Bacterial community structure Tax4Fun function prediction

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