农业现代化研究2018，Vol.39Issue(1)：155-162,8.DOI:10.13872/j.1000-0275.2017.0111
小麦秸秆生物质炭添加对第四纪红壤CO2和N2O排放的影响
Effect of wheat straw-biochar amendment on CO2 and N2O emissions from a Quaternary red soil
摘要
Abstract
Due to the special properties of biochar (e.g., high carbon content, strong absorption, and high pyrolysis), soil biochar amendment is increasingly regarded as a new measure to sequester soil carbon and mitigate greenhouse gas (GHG) emissions. To investigate the effect and mechanism of biochar amendment on CO2 and N2O emissions from red soils, an incubation experiment was carried out with an upland soil developed from Quaternary red clay. Five biochar (derived from wheat straw) treatments was arranged, with the application rates at 0, 0.5％, 1％, 2％ and 2.5％ (w/w). No biochar treatment was the control treatment. The incubation lasted 60 d with a constant water content at field capacity in a culture room at 25 ℃ . Significant correlations were observed between biochar application rates and CO2 and N2O emissions (P<0.01). During the 0-15 d incubation, especially in the first 2 d, CO2 emissions from the biochar amendment treatments were higher than the control treatment and increased with increasing biochar application rate, which might be caused by the decomposition of soluble organic and inorganic carbon within biochar. Contrary to CO2 emissions,biochar amendment reduced N2O emissions during first 10 d, in comparison with the control treatment. Due to its strong absorption capacity, biochar adsorbed and consequently reduced soil NH4+-N, and resultantly decreased N2O emissions via the nitrification process. Since Day 15, biochar amendments significantly reduced CO2 emissions by 8.2％-18.4％(P<0.05), compared to the control treatment. While, since Day 10, biochar amendments increased N2O emissions, compared to the control treatment. Over the entire incubation period of 60 days, biochar amendments increased CO2 (except for the biochar treatment with 0.5％ rate reducing CO2 emission, P<0.05) and N2O emissions by -6.3％-18.7％and 16.9％-58.5％ as compared to the control treatment, respectively. Our incubation experiment showed that the wheat straw-biochar amendments on a Quaternary red soil increased CO2 and N2O emissions, implying that biochar being a potential measure to mitigate greenhouse gas emissions from agricultural lands be controversial.关键词
生物质炭/红壤/二氧化碳/氧化亚氮/温室气体排放Key words
biochar/red soil/CO2/N2O/greenhouse gas emissions分类
资源环境引用本文复制引用
刘杰云,邱虎森,王聪,汤宏,沈健林,付金沐,吴金水..小麦秸秆生物质炭添加对第四纪红壤CO2和N2O排放的影响[J].农业现代化研究,2018,39(1):155-162,8.基金项目
湖南省自然科学基金项目(13JJ4114) （13JJ4114）
宿州学院博士科研启动基金(2015jb04) （2015jb04）
宿州学院教授科研启动基金(2015zb02). Natural Science Foundation of Hunan Province (13JJ4114) （2015zb02）
Ph.D Programs Foundation of Suzhou University (2015jb04) （2015jb04）
Professor Programs Foundation of Suzhou University (2015zb02). （2015zb02）
