农业环境科学学报Issue(2)：396-402,7.DOI:10.11654/jaes.2016.02.026
添加玉米秸秆及其生物质炭对砖红壤N 2O排放的影响
Effect of corn stalk and its biochar on N2O emissions from latosol soil
摘要
Abstract
A 60-d incubation experiment was conducted to investigate the effects of corn stalk and its biochar additions on properties, nitri-fication and N2O emissions of latosol soil under 30 ℃ and 75% field water holding capacity. Three treatments including biochar addition, stalk addition and control(CK)were used. At the end of the experiment, both biochar and stalk additions significantly increased soil pH, organic C, and available K content, with greater effects observed in stalk addition. Compared with CK(1604±169μg N2O-N·kg-1), stalk and biochar additions significantly reduced cumulative N2O emissions by 58.0% and 65.6%, respectively. However, the mechanisms by which N2O emissions reduced were different for biochar- and stalk-treated soils. N2O reduction in stalk-treated soil was attributed to de-crease in the nitrification of NH+4 pool caused by increased NH+4 immobilization, while N2O reduction in biochar-treated soil was probably due to decreased N2O production ratio from nitrification. Biochar enhanced the nitrification rate and produced large NO-3 content, thus in-creasing the risk of nitrate leaching in tropical latosol soil.关键词
生物质炭/秸秆/初期补氮/硝化作用/N2OKey words
biochar/corn stalk/initial nitrogen addition/nitrification/nitrous oxide分类
资源环境引用本文复制引用
潘凤娥,胡俊鹏,索龙,王小淇,季雅岚,孟磊..添加玉米秸秆及其生物质炭对砖红壤N 2O排放的影响[J].农业环境科学学报,2016,(2):396-402,7.基金项目
国家自然科学基金项目（41261063）；海南省自然科学基金项目 （）
