Management scheme influence and nitrogen addition effects on soil CO2, CH4, and N2O fluxes in a Moso bamboo plantation

Forest Ecosystems

Changhui Peng¹  Zhikang Gu²  Lianghua Qi³  Xinzhang Song⁴  Quan Li⁴  Jianhua Lv⁴  Junbo Zhang⁴  Xuzhong Song⁵ 

[1] Department of Biology Sciences, Institute of Environment Sciences, University of Quebec at Montreal, Case Postale 8888, Succursale Centre-Ville, H3C 3P8, Montreal, Canada;Huzhou Research Institute of Forestry, 313000, Huzhou, China;International Centre for Bamboo and Rattan, 100102, Beijing, China;State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, 311300, Hangzhou, China;Zhejiang Academy of Forestry, 310023, Hangzhou, China;

关键词: Greenhouse gases;    Management practices;    Nitrogen addition;    Phyllostachys edulis;    Q;   

DOI  :  10.1186/s40663-021-00285-0

来源: Springer

【 摘 要 】

BackgroundIt is still not clear whether the effects of N deposition on soil greenhouse gas (GHG) emissions are influenced by plantation management schemes. A field experiment was conducted to investigate the effects of conventional management (CM) versus intensive management (IM), in combination with simulated N deposition levels of control (ambient N deposition), 30 kg N·ha− 1·year− 1 (N30, ambient + 30 kg N·ha− 1·year− 1), 60 kg N·ha− 1·year− 1 (N60, ambient + 60 kg N·ha− 1·year− 1), or 90 kg N·ha− 1·year− 1 (N90, ambient + 90 kg N·ha− 1·year− 1) on soil CO2, CH4, and N2O fluxes. For this, 24 plots were set up in a Moso bamboo (Phyllostachys edulis) plantation from January 2013 to December 2015. Gas samples were collected monthly from January 2015 to December 2015.ResultsCompared with CM, IM significantly increased soil CO2 emissions and their temperature sensitivity (Q10) but had no significant effects on soil CH4 uptake or N2O emissions. In the CM plots, N30 and N60 significantly increased soil CO2 emissions, while N60 and N90 significantly increased soil N2O emissions. In the IM plots, N30 and N60 significantly increased soil CO2 and N2O emissions, while N60 and N90 significantly decreased soil CH4 uptake. Overall, in both CM and IM plots, N30 and N60 significantly increased global warming potentials, whereas N90 did not significantly affect global warming potential. However, N addition significantly decreased the Q10 value of soil CO2 emissions under IM but not under CM. Soil microbial biomass carbon was significantly and positively correlated with soil CO2 and N2O emissions but significantly and negatively correlated with soil CH4 uptake.ConclusionOur results indicate that management scheme effects should be considered when assessing the effect of atmospheric N deposition on GHG emissions in bamboo plantations.

【 授权许可】

CC BY