干旱地区农业研究2017，Vol.35Issue(4)：137-144,8.DOI:10.7606/j.issn.1000-7601.2017.04.21
不同生物质炭输入水平下黄绵土N2O日排放特性
Diurnal variations of gases emission in loessial soil under biochar application
摘要
Abstract
Biochar is a carbon-rich solid product by heating of biomass in an oxygen-limited environment.Biochar application is supposed to have the potential for greenhouse gas mitigation.The aim of this study was to determine the effects of biochar on nitrous oxide (N2O) emissions.The treatments consisted of six different biochar levels,including TI (0 t·hm-2),BT1 (10 t·hm-2),BT2 (20 t·hm-2),BT3 (30 t·hm-2),BT4 (40 t·hm-2),and BT5 (50 t·hm-2),with a randomized complete block design with three replieatiom.Soil moisture and temperature were measured as well as N2O.The results showed that the N2O fluxes had significant difference in diurnal variations among biochar treatments.The loessial soil is a source of N2O emission,and similarly the the loessial soil of the other biochar treatments.The N2O flux emission of soil without biochar input was significantly higher than other treatments.With the increase in the application rate,the accumulate flux emission of N2O showed a "U" type change pattern,and the rate of 30 t· hm-2 showed the better depression effect on N2O gas emission.The total daily emission fluxes of N2O in each treatment were the highest in the daytime.The combination of water and heat caused by the biochar might be the main cause of the different of the whole day N2O gas emission.Temperature is the main influence factor of N2O gas emission under the condition of relatively stable environment.The soil temperature in 10 cm depth increased with increasing the application rate of biochar.The optimal observation duration of the N2O gas is 8 a.m.to 9 a.m.关键词
黄绵土/生物质炭/N2O排放Key words
loessial soil/biochar/N2O emission分类
资源环境引用本文复制引用
宋敏,齐鹏,蔡立群,张仁陟,Stephen Yeboah,武均,王旭燕,潘占东..不同生物质炭输入水平下黄绵土N2O日排放特性[J].干旱地区农业研究,2017,35(4):137-144,8.基金项目
甘肃省自然科学基金(No.145RJZA204) （No.145RJZA204）
省部共建国家重点实验室培育基地开放基金课题(GSCS-2012-13) （GSCS-2012-13）
