Effects of Nitrogen Deposition on CH4 Uptake and CO2 Emission from a temperate forests in Northeastern China

DOI

10.2991/icseee-15.2016.53How to use a DOI?

Keywords

Nitrogen deposition, CH4 uptake, CO2 emission, temperate forests.

Abstract

Little is known about how N deposition affects greenhouse gas balances in different temporal patterns (daytime and nighttime),and few studies have been conducted to quantify the effects of N deposition on soil CH4 uptake and CO2 emission in a typical temperate forests. To investigate the effects of N deposition on soil CH4 uptake and CO2 emission, simulated N deposition experiment was initiated in temperate forests in Northeastern China in May 2011. In this study, NH4NO3 fertilizer was applied throughout the growing season at four N treatment levels (three replicates): control (CK), no added N; low-N (TL), 5 g N m-2.yr-1; medium-N (TM), 10 g N m-2.yr-1; and high-N (TH), 15 g N m-2.yr-1. Diurnal soil CH4 uptake and CO2 emission rates were observed in August 2014 using Greenhouse Gas Analyzers. Our results showed that N deposition tended to restrict CH4 uptake and significantly increased soil CO2 emission (except in the TH treatment). In addition, the CO2 and CH4 fluxes in daytime and nighttime were significantly different. These results indicate that N deposition controls the CH4 uptake and suggest that alterations of the N cycle due to N deposition may convert sequestered C in forest soils into a C source. However, this paper is also to promote a better understanding of the impact of N deposition on soil C fluxes under the different temporal patterns.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Guoyong Yan
AU  - Yajuan Xing
AU  - Miao Wang
AU  - Jianyu Wang
AU  - Shijie Han
AU  - Qinggu Wang
PY  - 2016/04
DA  - 2016/04
TI  - Effects of Nitrogen Deposition on CH4 Uptake and CO2 Emission from a temperate forests in Northeastern China
BT  - Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 323
EP  - 335
SN  - 2352-5401
UR  - https://doi.org/10.2991/icseee-15.2016.53
DO  - 10.2991/icseee-15.2016.53
ID  - Yan2016/04
ER  -