文献类型：期刊文献

英文题名：Nitrous oxide fluxes from three forest types of the tropical mountain rainforests on Hainan Island, China

作者：Bai, Zhenzhi[1] Yang, Gang[1] Chen, Huai[2] Zhu, Qivan[1] Chen, Dexiang[3] Li, Yide[3] Wang, Xu[3] Wu, Zhongmin[3] Zhou, Guangyi[3] Peng, Changhui[1,4]

第一作者：Bai, Zhenzhi

通信作者：Chen, H[1]

机构：[1]Northwest A&F Univ, Lab Ecol Forecasting & Global Change, Yangling 712100, Peoples R China;[2]Chinese Acad Sci, Chengdu Inst Biol, Key Lab Sichuan Prov, Key Lab Mt Ecol Restorat & Bioresource Utilizat &, Chengdu 610041, Peoples R China;[3]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[4]Univ Quebec Montreal UQAM, Inst Environm Sci, Dept Sci Biol, Montreal, PQ H2X 3Y7, Canada

年份：2014

卷号：92

起止页码：469-477

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：20142017721374);Scopus(收录号：2-s2.0-84899919448);WOS:【SCI-EXPANDED(收录号:WOS:000338810800049)】；

基金：This study was supported by the Program for New Century Excellent Talents in University (No. NCET-12-0477), Specialized Research Fund for the Doctoral Program of Higher Education (No. 20120204110011), China's QianRen program, the 100 Talents Program of the Chinese Academy of Sciences, the National Natural Science Foundation of China (no. 31100348), and a Natural Sciences and Engineering Research Council of Canada (NSERC) discovery grant. The authors give special thanks to Ms. Wan Xiong for her editing and valuable comments on the manuscript. We also thank two anonymous reviewers for their detailed evaluation and constructive suggestions on our manuscript.

语种：英文

外文关键词：Tropical mountain rainforest; N2O fluxes; Water filled pore space; Soil temperature; Spatial and temporal variability

摘要：Tropical rainforest soil is an important source of atmospheric nitrous oxide (N2O). However, there is still considerable uncertainty about the spatial and temporal variability of N2O fluxes. To understand these fluxes, we quantified the annual N2O emissions from three tropical mountain rainforests (primary mountain rainforest, PMR; secondary mountain rainforest, SMR; and Podocaipus imbricatus plantation, PIP) in the Jian-fengling National Natural Reserve on Hainan Island, China. The average of N2O emissions in this area was 2.52 +/- 033 kg N-N2O ha(-1) yr(-1) (3.52 kg N-N2O ha(-1) yr(-1) in the wet season and 1.62 kg N-N2O ha(-1) yr(-1) in the dry season) during our study period, with highly seasonal variations. The mean N2O emission rates were significantly higher during the wet season (68% of the total average) than the dry season (32% of the total average) (P < 0.05). PIP had the highest N2O emission rate at 3.49 +/- 0.61 kg N-N2O ha(-1) yr(-1) (4.74 kg N-N2O ha(-1) yr(-1) in the wet season and 232 kg N-N2O ha(-1) yr(-1) in the dry season), followed by SMR at 3.03 +/- 0.64 kg N-N2O ha(-1) yr(-1) (4.16 kg N-N2O ha(-1) yr(-1) in the wet season and 1.97 kg N-N2O ha(-1) yr(-1) in the dry season), and then PMR at 1.53 +/- 0.49 kg N-N2O ha(-1) yr(-1) (2.21 kg N-N2O ha(-1) yr(-1) in the wet season and 0.94 kg N-N2O ha(-1) yr(-1) in the dry season). We observed a significant Gaussian relationship between the N2O fluxes and soil temperature for SMR and PIP but no significant relationship in PMR. There was a significant exponential relationship between the N2O fluxes and water filled pore space (WFPS) in SMR and PIP but not in PMR. (C) 2014 Elsevier Ltd. All rights reserved.