DOI: 10.1016/j.jclepro.2019.119148
论文题名: Biochar changes thermal activation of greenhouse gas emissions in a rice–lettuce rotation microcosm experiment
作者: Qi L. ; Pokharel P. ; Ni C. ; Gong X. ; Zhou P. ; Niu H. ; Wang Z. ; Gao M.
刊名: Journal of Cleaner Production
ISSN: 9596526
出版年: 2020
卷: 247 语种: 英语
英文关键词: Activation energy
; Arrhenius equation
; Ecosystem respiration
; Labile organic carbon
; Nitrous oxide
; Soil temperature
Scopus关键词: Activation energy
; Agricultural wastes
; Crops
; Cultivation
; Ecosystems
; Fertilizers
; Gas emissions
; Magnesium
; Nitrogen oxides
; Organic carbon
; Pollution control
; Soils
; Temperature
; Activation energies (Ea)
; Arrhenius equation
; Ecosystem respiration
; Intrinsic temperature sensitivity
; Microbial biomass carbon
; Microcosm experiments
; Nitrous oxide
; Soil temperature
; Greenhouse gases
英文摘要: Despite numerous studies of the effects of biochar amendments on soil greenhouse gas (GHG) emissions in recent years, the intrinsic temperature sensitivity of GHG emissions in biochar-amended soils is still not clear. In order to investigate the effects of biochar on the thermal activation of GHG emissions, the GHG emissions and their activation energies (Ea) were analyzed in a rice-lettuce rotation microcosm experiment. The experiment had five treatments: control (CK), chemical fertilizers (NPK), and three biochar application rates that are equivalent to 10 Mg ha−1 biochar (BC10), 20 Mg ha−1 biochar (BC20) and 40 Mg ha−1 biochar (BC40). The study showed that biochar treatments reduced CO2 and N2O emissions by lowering their Ea compared with the NPK treatment in the rice cultivation season. The biochar amendment treatments significantly reduced N2O cumulative emissions by 55.2–72.9% compared with the NPK treatment in the lettuce cultivation season largely due to the thermally deactivated impact of soil temperature on N2O emissions. Microbial biomass carbon was increased in the lower rates of biochar amendment in both crop cultivation seasons. These findings suggest that biochar amendment of soil has the potential to decrease the positive and increase the negative Ea of GHG emissions, with the implication of mitigating GHG emissions from cropland soils that would otherwise be increased by applying chemical fertilizers in the context of rising global temperature. Production of biochar from agricultural wastes, which is a method of cleaner production, and its application to the soil shows its potential for reducing GHG emissions by changing the thermal activation of the emissions during rice–lettuce crop rotation. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159230
Appears in Collections: 气候变化与战略
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作者单位: College of Resources and Environment, Southwest University, Chongqing, 400715, China; Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton, T6G 2E3, Canada; College of Forestry, Beijing Forestry University, Beijing, 100083, China
Recommended Citation:
Qi L.,Pokharel P.,Ni C.,et al. Biochar changes thermal activation of greenhouse gas emissions in a rice–lettuce rotation microcosm experiment[J]. Journal of Cleaner Production,2020-01-01,247