文献类型：期刊文献

中文题名：南亚热带典型乡土阔叶人工林土壤微生物碳源利用及功能多样性

英文题名：Soil microbial carbon source utilization and functional diversity of typical native broadleaved plantations in south subtropical China

作者：陈超凡[1] 吴水荣[2] 覃林[1] 范垚城[1] 谭玲[1] 郭文福[3]

第一作者：陈超凡

机构：[1]广西大学林学院;[2]中国林业科学研究院林业科技信息研究所;[3]中国林业科学研究院热带林业实验中心

年份：2016

卷号：35

期号：5

起止页码：1132-1139

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金项目(31270681)资助

语种：中文

中文关键词：人工林;土壤微生物群落;碳源利用;功能多样性

外文关键词：planted forest; soil microbial community; carbon source utilization; functional di-versity.

分类号：S154.3

摘要：研究南亚热带典型乡土阔叶人工林土壤微生物碳源利用及功能多样性对红壤丘陵地区植被恢复重建树种的选择具有重要意义。本研究采用Biolog．Eco技术，对4种典型乡土阔叶人工林（红椎林、米老排林、火力楠林和山白兰林）和外来速生桉树人工林不同土壤深度（0～20、20-40和40～60cm）土壤微生物的碳源利用及功能多样性进行分析。结果表明，5种林分土壤微生物对单一碳源利用的最佳培养时间为108h。各林分土壤微生物对碳源的利用能力受时间因素的影响显著，并随土层深度的增加而下降；在培养108h时，4种乡土阔叶人工林土壤微生物对碳源利用能力的差异不明显，但均高于桉树林。Shannon指数和Simpson指数表明，4种乡土阔叶人工林各土层的土壤微生物功能多样性均大于桉树林，但乡土阔叶人工林土壤微生物功能多样性在各土层的差别各异。对31种碳源吸光值进行主成分分析和聚类分析表明，糖类、氨基酸类、多聚物类、羧酸类和芳香类碳源是不同林分之间土壤微生物功能多样性差异的敏感碳源。
Understanding soil microbial carbon source utilization and functional diversity of typi- cal native broadleaved artificial forests is of great importance in tree species selection for vegeta- tion restoration and reconstruction of hilly red soil areas in south subtropical China. By using Biolog-Eco technology, we studied the soil microbial carbon source utilization and functional di- versity at different soil depths （0-20, 20-40 and 40-60 cm） of four typical native broadleaved planted forests （Castanopsis hystrix, Mytilaria laosensis, Michelia macdurei and Paramichelia bailonii） and exotic fast-growing eucalyptus plantation in the Fubo Forest Farm in Pingxiang, Guangxi. The results showed that the optimum incubation time for the capacity of soil microbes using mono-carbon source in the five planted forests was 108 h. The capacity of soil microbial car- bon source utilization of the different planted forests increased with the incubation time, and de- creased with the soil depth. At the incubation time of 108 h, the capacity of soil microbial carbon source utilization among the four native broadleaved planted forests had no significant difference, but it was higher than that of the eucalyptus plantation. The Shannon index and Simpson index in- dicated that the functional diversity of soil microbial community of the four native broadleaved planted forests were different at various soil depths, and they were higher than those of the euca-lyptus plantation at the same soil horizon. The principal component analysis and cluster analysis of 31 carbon sources indicated that carbohydrate, amino acid, polymerizer, carboxylic acid and aromatic carbon were sensitive carbon sources to the functional diversity of soil microbial commu- nities in the different planted forests.