生态学报2017，Vol.37Issue(20)：6700-6711,12.DOI:10.5846/stxb201607281546
施用生物炭和秸秆还田对华北农田CO2、N2O排放的影响
Effects of biochar and straw return on CO2and N2O emissions from farmland in the North China Plain
摘要
Abstract
A 6-year biochar and straw return experiment with a winter wheat-summer maize rotation system in the North China Plain investigated the effects of biochar and straw return on CO2 and N2O fluxes using the static chamber/gas chromatography method.The experiment consisted of four treatments with three replicates.The treatments were CK (control),C1 (biochar 4.5 t hm-2 a-1),C2 (biochar 9.0 t hm-2 a-1),and SR (straw return).The results showed that the CO2 and N2O fluxes trends were generally the same throughout the whole rotation period.After applying the biochar,the CO2 fluxes increased 0.3％-90.3％ (C1),1.0％-334.2％ (C2),and 0.4％-156.3％ (SR).The C2 treatment had the greatest effect on CO2 cumulative emissions,with an increase of 42.9％.The N2O flux results showed that the C2 treatment significantly (P ＜ 0.05) reduced cumulative N2O emissions,but increased the comprehensive warming potential of CO2 and N2O emissions.In contrast,the C1 and SR treatments had no significant effect on cumulative N2O emissions and the comprehensive warming potential.The correlation analysis showed that CO2 flux was significantly positively (P ＜ 0.01) correlated with soil temperature and soil water content,and that the N2O flux was significantly positively (P ＜ 0.01) correlated with soil temperature,soil water content,NO3--N,and NH4+-N,but significantly negatively (P ＜ 0.01) correlated with soil pH.In summary,the addition of biochar has the potential to significantly reduce nitrogen gas loss.关键词
生物炭/秸秆还田/CO2/N2O/综合增温潜势/华北农田Key words
biochar/straw return/CO2/N2O/global warming potential GWP)/the North China Plain引用本文复制引用
刘杏认,张星,张晴雯,李贵春,张庆忠..施用生物炭和秸秆还田对华北农田CO2、N2O排放的影响[J].生态学报,2017,37(20):6700-6711,12.基金项目
国家自然科学基金项目(31300375) （31300375）
国家水体污染控制与治理科技重大专项(2015ZX07203-007) （2015ZX07203-007）
中央公益型科研院所基本科研业务费专项(BSRF201505) （BSRF201505）
