文献类型：期刊文献

英文题名：Soil microbial community composition rather than litter quality is linked with soil organic carbon chemical composition in plantations in subtropical China

作者：Wang, Hui[1] Liu, Shirong[1] Chang, Scott X.[2] Wang, Jingxin[3] Shi, Zuomin[1] Huang, Xueman[1] Wen, Yuan[4] Lu, Lihua[5] Cai, Daoxiong[5]

通信作者：Liu, SR[1]

机构：[1]Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, Chinas State Forestry Adm, Key Lab Forest Ecol & Environm, Beijing 100091, Peoples R China;[2]Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada;[3]W Virginia Univ, Div Forestry & Nat Resources, Morgantown, WV 26506 USA;[4]Beijing Normal Univ, Coll Life Sci, Ctr Landscape Ecol & Sustainabil Sci, Beijing 100875, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Guangxi, Peoples R China

年份：2015

卷号：15

期号：5

起止页码：1094-1103

外文期刊名：JOURNAL OF SOILS AND SEDIMENTS

收录：;Scopus(收录号：2-s2.0-84937762380);WOS:【SCI-EXPANDED(收录号:WOS:000352977800006)】；

基金：We would like to thank the Guangxi Youyiguan Forest Ecosystem Research Station for assisting with research permits and providing logistical support; Jia Xu, Pizheng Hong, Jian Hao, Haolong Yu, Da Luo, Yi Wang, Riming He, Hai Chen, Angang Ming, Zhongguo Li, Lu Zheng, and Chaoying Li for assistance with field work and laboratory analysis; and Jiangming Mo and Yunting Fang for reviewing drafts of this manuscript. Grants from the Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry (CAFRIFEEP201104), the China National Natural Science Foundation (31100380, 31290223), the Ministry of Science and Technology (2012BAD22B01, 2015DFA31440), the Lecture and Study Program for Outstanding Scholars from Home and Abroad (CAFYBB2011007), and CFERN&GENE Award Funds on Ecological Paper supported this study.

语种：英文

外文关键词：Litter quality; Nuclear magnetic resonance spectroscopy (NMR); Organic carbon chemical composition; Plantation; Soil microbial biomass and community

摘要：Native broadleaf plantations are increasingly being developed as an alternative to coniferous plantations. This study examined the relationships among litter carbon (C) quality, soil microbial community composition, and soil organic C (SOC) chemical properties in plantations and how they were affected by tree species. The solid-state C-13 nuclear magnetic resonance spectroscopy (NMR) technique was used to examine SOC chemical composition, and litter and fine root C quality in four plantations of native tree species (Pinus massoniana, Castanopsis hystrix, Michelia macclurei, and Mytilaria laosensis) in Pingxiang, Guangxi Zhuang Autonomous Region, in subtropical China. Soil microbial biomass C and nitrogen (N) were determined by the chloroform fumigation-extraction method and soil bacterial and fungal biomass were measured with the phospholipid fatty acid (PLFA) technique. The proportions of O-alkyl C, alkyl C, aromatic C, and carbonyl C in SOC and the alkyl/O-alkyl C ratio (A/O-A) in litter and fine root samples, soil microbial C and N, microbial C/N ratios, and the amount of PLFAs were significantly different among the four plantations of different species. SOC in the 0-10-cm layer had 43-49 % O-alkyl C, 24-34 % alkyl C, 14-17 % aromatic C, and 9-11 % carbonyl C in SOC. The microbial C/N ratio, the amount of total PLFAs, and bacterial and Gram-positive bacterial population sizes were linked to the proportion of alkyl C in SOC and the A/O-A ratio in soil. The proportion of alkyl C in SOC was not related to the proportion of alkyl C in litter or fine root samples. The microbial community composition rather than plant litter or fine root quality was linked to chemical composition of SOC in the studied subtropical plantations. Future research should place more emphasis on the processes involved in the formation of SOC and their association with the microbial community.