文献类型：期刊文献

英文题名：Changes of soil microbial biomass carbon and community composition through mixing nitrogen-fixing species with Eucalyptus urophylla in subtropical China

作者：Huang, Xueman[1] Liu, Shirong[1] Wang, Hui[1] Hu, Zongda[2] Li, Zhongguo[3] You, Yeming[4]

第一作者：Huang, Xueman

通信作者：Liu, SR[1]

机构：[1]Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, State Forestry Adm, Key Lab Forest Ecol & Environm, Beijing 100091, Peoples R China;[2]Sichuan Agr Univ, Coll Resources & Environm, Chengdu 611130, Sichuan, Peoples R China;[3]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China;[4]Beijing Forestry Univ, Minist Educ, Key Lab Silviculture & Conservat, Beijing 100083, Peoples R China

年份：2014

卷号：73

起止页码：42-48

外文期刊名：SOIL BIOLOGY & BIOCHEMISTRY

收录：;EI(收录号：20141117460511);Scopus(收录号：2-s2.0-84895743869);WOS:【SCI-EXPANDED(收录号:WOS:000336012100005)】；

基金：We gratefully acknowledge the support of Riming He, Hai Chen, Angang Ming, Haolong Yu of Guangxi Youyiguan Forest Ecosystem Research Station for their assistance in field sampling and data collection. A special thank goes to Shuxia Fu for PLFA extraction and Prof. Lixia Zhou for analysis and identification of PLFA extracts. We also gratefully acknowledge the support from the Experimental Center of Tropical Forestry, Chinese Academy of Forestry. This study was jointly funded by China's National Natural Science Foundation (31290223 and 31100380), the Ministry of Finance (201104006 and 200804001), and the Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry (CAFRIFEEP201104) and the Ministry of Science and Technology (2011CB403205 and 2012BAD22B01), and was also supported by CFERN 82 GENE Award Funds on Ecological Paper. We are grateful to Dr. Junwei Luan, Dr. Lei Liu, and Dr. Yanpeng Zhu for assistance in statistical analyses and useful discussions on the manuscripts. Finally, we thank Jia Xu, and Yuan Wen for assistance in field data collection.

语种：英文

外文关键词：Eucalyptus plantation; Soil microbial biomass; Soil microbial community; PLFA; N-fixing species; Soil carbon sequestration

摘要：In this study we examined the effects of mixing N-fixing species with Eucalyptus on microbial biomass carbon (MBC) and phospholipid fatty acid (PLFA) composition using a comparative experiment of an 8-year-old pure Eucalyptus urophylla plantation (PP) and an 8-year-old mixed E. urophylla and Acacia mangium plantation (MP) in Guangxi Zhuang Autonomous Region, southern China. Additionally, a trench control experiment was conducted to distinguish the effects of roots on MBC and community structure. The results showed that the number and abundance of PLFAs and MBC were higher in MP than that in PP. The soil TOC, NH4-N, NO3-N, TN and litterfall mass were significantly higher in surface soil (0-10 cm) in MP; whereas the C/N ratios of soil and litterfall were significantly lower by 37.6% and 78.5%, respectively, in MP than in PR MBC at the surface soil (0-10 cm) was significantly higher by 9.0% in MP than in PP. Principal Component Analysis (PCA) indicated that soil microbial community structure differed between the two plantations, and between the trenched and untrenched plots. Redundancy analysis (RDA) also revealed that C/N ratios of soil and litterfall, TOC, NH4-N, litterfall mass and NO3-N were key factors affecting the soil microbial community regardless of plantation types. Our study suggests that mixing N-fixing species into E. urophylla plantations can enhance soil C sequestration by increasing TOC and MBC, as well as through increased soil microbial community diversity and abundance. Findings from this study could assist sustainable management of Eucalyptus plantations for biomass carbon production, soil C sequestration and retention. (c) 2014 Elsevier Ltd. All rights reserved.