南京林业大学学报(自然科学版) ›› 2017, Vol. 41 ›› Issue (03): 15-21.doi: 10.3969/j.issn.1000-2006.201702012

• 专题报道 • 上一篇    下一篇

生物炭添加对土壤冻融过程中温室气体排放的影响

刘 翔1,2,韩建刚3,李兰海1*,朱咏莉3*   

  1. 1.中国科学院新疆生态与地理研究所,荒漠与绿洲生态国家重点实验室,新疆 乌鲁木齐 830011;
    2.中国科学院大学,北京 100049;
    3.南方现代林业协同创新中心,南京林业大学生物与环境学院,江苏 南京 210037
  • 出版日期:2017-06-18 发布日期:2017-06-18
  • 基金资助:
    收稿日期:2017-02-13 修回日期:2017-04-11
    基金项目:国家自然科学基金项目(41471191,41375149); 江苏省“青蓝工程”资助项目(苏教师[2016]15号); 江苏高校优势学科建设工程资助项目(PAPD)
    第一作者:刘翔(liuxiang12@mails.ucas.ac.cn)。*通信作者:李兰海(lilh@ms.xjb.ac.cn),研究员,主要负责试验的设计; 朱咏莉(lyly1262011@126.com),研究员,主要负责数据的处理和分析。
    引文格式:刘翔,韩建刚,李兰海,等. 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.

Impacts of biochar addition on greenhouse gas fluxes from soils subjected to freeze-thaw process

LIU Xiang1,2, HAN Jiangang3, LI Lanhai1*, ZHU Yongli3*   

  1. 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
  • Online:2017-06-18 Published:2017-06-18

摘要: 【目的】研究模拟生物炭添加对土壤冻融过程中二氧化碳(CO2)、甲烷(CH4)和氧化亚氮(N2O)排放的影响,为冻融期土壤温室气体的减排提供参考。【方法】以伊犁河谷典型农田为研究对象,野外采集原状土柱,并在室内模拟不同幅度的冻融过程(+5 ℃、-5 ℃~ +5 ℃和-10 ℃ ~ +10 ℃),探求冻融过程中土壤CO2、CH4和N2O排放对生物炭添加(0、20和40 t/hm2)的响应特征。【结果】与不添加生物炭的处理相比,添加生物炭会使冻融过程中的土壤CO2排放量提高1.1~1.4倍,但该影响远小于冻融作用对土壤CO2排放的促进作用(为CK的1.5~3.2倍); 虽然冻融作用未显著(P > 0.05)影响土壤CH4的累积排放量,但生物炭的添加显著(P < 0.05)促进了45.5%~81.8%的CH4吸收量; 冻融作用使土壤N2O的累积排放量提高了1.3~3.0倍,生物炭降低了冻融过程中10.2%~30.9%的土壤N2O排放量,但在多数情况下这种减小并不显著(P > 0.05)。【结论】模拟生物炭添加会增加土壤冻融过程中CO2的排放,也会促进CH4的吸收和N2O的减排。

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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