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生物炭添加对土壤冻融过程中温室气体排放的影响(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年03期
Page:
15-21
Column:
专题报道
publishdate:
2017-05-31

Article Info:/Info

Title:
Impacts of biochar addition on greenhouse gas fluxes from soils subjected to freeze-thaw process
Article ID:
1000-2006(2017)03-0015-07
Author(s):
LIU Xiang12 HAN Jiangang3 LI Lanhai1* ZHU Yongli3*
1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
Keywords:
biochar soil subjected to freeze-thaw process greenhouse gas Ili River Valley
Classification number :
S154.2; X171.1
DOI:
10.3969/j.issn.1000-2006.201702012
Document Code:
-
Abstract:
【Objective】 Investigating the impacts of biochar addition on carbon dioxide(CO2), methane(CH4)and nitrous oxide(N2O)fluxes from soils subjected to freeze-thaw process could provide basis for the mitigation of soil greenhouse gas emissions during freeze-thaw period. 【Method】 Intact soil cores were collected from a cropland in the Ili River Valley and then subjected to freeze-thaw processes with different freeze-thaw amplitudes(+5 ℃, -5 ℃ - +5 ℃ and -10 ℃ - +10 ℃)in the laboratory, to explore the responses of soil CO2, CH4 and N2O fluxes to biochar addition(0, 20 and 40 t/hm2)during freeze-thaw process. 【Result】 CO2 fluxes from soils with biochar additions were 1.1-1.4 times higher than those from soils without adding biochar. However, such increases were lower compared to the promoting effects of freeze-thaw on soil CO2 flux(1.5-3.2 times). Although freeze-thaw process did not significantly(P > 0.05)affect the cumulative flux of soil CH4, biochar additions significantly(P < 0.05)increased soil CH4 flux by approximately 45.5%-81.8%. Biochar decreased soil N2O flux by 10.2%-30.9% during freeze-thaw process, but such decreases were not significant(P > 0.05)in most cases. 【Conclusion】 Biochar addition may increase the emission of soil CO2, while promote the uptake of soil CH4 and the mitigation of soil N2O during freeze-thaw process.

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Last Update: 2017-05-20