南京林业大学学报（自然科学版）2017，Vol.41Issue(3)：15-21,7.DOI:10.3969/j.issn.1000-2006.201702012
生物炭添加对土壤冻融过程中温室气体排放的影响
Impacts of biochar addition on greenhouse gas fluxes from soils subjected to freeze-thaw process
摘要
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.关键词
生物炭/土壤冻融过程/温室气体/伊犁河谷Key words
biochar/soil subjected to freeze-thaw process/greenhouse gas/Ili River Valley分类
农业科技引用本文复制引用
刘翔,韩建刚,李兰海,朱咏莉..生物炭添加对土壤冻融过程中温室气体排放的影响[J].南京林业大学学报（自然科学版）,2017,41(3):15-21,7.基金项目
国家自然科学基金项目(41471191,41375149) （41471191,41375149）
江苏省“青蓝工程”资助项目(苏教师[2016] 15号) （苏教师[2016] 15号）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
