南亚热带不同树种人工林对土壤细菌群落多样性的影响  

Effects of Different Tree Species Plantations on Soil Bacterial Community Diversity in South Subtropical China

作　　者：覃鑫浩 梁艳 陈超凡[2] 覃林[2,3] QIN Xin-hao;LIANG Yan;CHENG Chao-fan;QIN Lin(Academy of Forest Inventory and Planning,National Forestry and Grassland Administration,Beijing 100714,China;College of Forestry,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Key Laboratory of Forest Ecology and Conservation,Guangxi University,Nanning 530004,Guangxi,China)

机构地区：[1]国家林业和草原局调查规划设计院,北京100714 [2]广西大学林学院,广西南宁530004 [3]广西森林生态与保育重点实验室,广西南宁530004

出　　处：《林业科学研究》2021年第4期120-127,共8页Forest Research

基　　金：国家自然科学基金项目(31560109)。

摘　　要：[目的]探讨我国南亚热带地区不同树种人工林对土壤细菌群落多样性的影响,为该地区实施人工林生态系统适应性经营策略的树种选择提供土壤微生物生态学方面的科学依据。[方法]采用PCR-DGGE技术,比较分析位于广西凭祥市中国林业科学研究院热带林业实验中心的4个乡土树种(马尾松、红锥、米老排和火力楠)人工林和外来树种尾巨桉人工林土壤(0~20 cm)细菌群落的丰富度、多样性和均匀度,并探讨了土壤细菌群落多样性与土壤理化性质因子之间的相互关系。[结果]5种不同树种人工林土壤细菌群落多样性之间无显著差异(p>0.05),其土壤细菌群落多样性与土壤全氮和全磷呈显著正相关(p<0.05)。[结论]从土壤细菌群落多样性看,在该地区营建乡土树种人工林与外来桉树人工林的效果无明显差异。[Objective]To examine the effects of plantations composed of different tree species on soil bacterial community diversity in south subtropical China,and to provide reference for the selection of tree species for the adaptive management strategy of plantation ecosystem in this region.[Method]The richness,Shannon index,Simpson index and evenness of soil(0-20 cm)bacterial communities under four indigenous tree species(Pinus massoniana Lamb.,Castanopsis hystrix(Lamb.)Hook.,Mytilaria laosensis Lec.and Michelia macclurei Dandy)plantations and the plantation of exotic tree species Eucalyptus urophylla×E.grandis were studied by using PCR-DGGE technology in the Experimental Center of Tropical Forestry of Chinese Academy of Forestry in Pingxiang,Guangxi.Moreover,the relationship between soil bacterial community diversity and soil physichemical properties was discussed.[Result]No significant difference in diversity of soil bacterial communities was observed among the five types of plantations(p>0.05).The bacterial community diversity of the five plantations was significantly and positively correlated with total nitrogen and total phosphorus(p<0.05).[Conclusion]There is no significant difference between the native tree species plantation and the exotic eucalyptus plantation in this area in view of soil bacterial community diversity.

关 键 词：土壤细菌群落 PCR-DGGE技术 人工林 南亚热带 

分 类 号：Q143[生物学—生态学] S154[生物学—普通生物学]