华南农业大学学报2017，Vol.38Issue(5)：36-42,7.DOI:10.7671/j.issn.1001-411X.2017.05.007
农业废弃物还田对黑土温室气体排放及全球增温潜势的影响
Effects of agricultural wastes on greenhouse gas emission and global warming potential in black soil
摘要
Abstract
[Objective] To study the effects of cow dung,chicken manure,and corn straw combined with chemical fertilizers on greenhouse gas emission and global warming potential.[Method] We used the static chamber technique and set up five treatments including control,chemical fertilizers only,cow dung plus chemical fertilizers containing 50％ nitrogen of the total nitrogen in the treatment,chicken manure plus chemical fertilizers with 50％ nitrogen,and straw plus chemical fertilizers with 90％ nitrogen.Totally 240 kg·hm-2 nitrogen was applied in each treatment except for control.[Result] Among all treatments,the straw treatment resulted in the highest average emission flux and average total emission of CO2,being 388.96 mg·m-2·h-1 and 14 718.97 kg·hm-2 respectively.Nitrogen topdressing evidently promoted CO2 emission.The treatment of chemical fertilizers only resulted in the highest average absorption flux and average total absorption of CH4,being 0.042 mg·m-2·h-1 and 1.36 kg·hm-2 respectively,and resulted in the highest average emission flux and average total emission of N2 O,being 0.153 mg·m-2·h-1 and 5.75 kg·hm-2 respectively.The global warming potential in the straw treatment was significantly higher than those in other treatments.The global warming potential in the cow dung treatment was lower than that in the treatment of chemical fertilizers only,yet the difference was not significant.[Conclusion] Straw coverage can increase CO2 emission in black soil.Upland soil is an important sink of CH4 in the air.Compared with chemical fertilizers only,organic manure combined with inorganic fertilizer can reduce N2O releasing.The contributions of different agricultural wastes to atmospheric warming vary in degree.关键词
农业废弃物/温室气体/CO2/CH4/N2O/全球增温潜势Key words
agricultural waste/greenhouse gas/CO2/CH4/N2O/global warming potential分类
农业科技引用本文复制引用
韩圆圆,曹国军,耿玉辉,叶青,王振华,黄岩..农业废弃物还田对黑土温室气体排放及全球增温潜势的影响[J].华南农业大学学报,2017,38(5):36-42,7.基金项目
国家科技支撑计划(2012BAD14B05,2011BAD16B10-2,2012BAD04B02-2) （2012BAD14B05,2011BAD16B10-2,2012BAD04B02-2）
