应用生态学报2000，Vol.11Issue(3)：385-389,5.
农田和森林土壤中氧化亚氮的产生与还原
Production and reduction of nitrous oxide in agricultural and forest soils
摘要
Abstract
A soil-water slurry experiment was conducted to study the potentials of N2O production and reduction in denitrification of agricultural and beech forest soils in Denmark. The effects of nitrate and ammonium additions on denitrification were also investigated. The forest soil showed a higher denitrification potential than the agricultural soil. However, N2O reduction potential of the agricultural soil was higher than the beech forest soil, shown by the ratio of N2O/N2 approximately 0.11 and 3.65 in the agricultural and the beech forest soils, respectively. Both nitrate and ammonium additions stimulated the N2O production in the two soils, but reduced the N2O reduction rates in the agricultural soil slurries. In contrast to the effect on the agricultural soil, nitrate reduced the N2O reduction rate in the beech forest soil, while ammonium showed a stimulating effect on the N2O reduction activity. After one week incubation, all of the N2O produced was reduced to N2 in the agricultural soil when nitrate was still present. Nitrous oxide reduction in the beech forest soil occurred only when nitrate almost disappeared. The different nitrate inhibitory effect on the N2O reduction activity in the two soils was due to the difference in soil pH. Inhibition of nitrate on N2O reduction was significant under acidic condition. Consequently, soil could serve as a sink of atmospheric N2O under the conditions of anaerobic, pH near neutral and low nitrate content.关键词
反硝化作用/温室气体/N2O还原/N2O/N2比率Key words
Denitrification, N2O reduction, Greenhouse gases, N2O/N2 ratio分类
农业科技引用本文复制引用
于克伟,Struwe,S..农田和森林土壤中氧化亚氮的产生与还原[J].应用生态学报,2000,11(3):385-389,5.基金项目
欧洲联盟资助项目The research was supported by an European Union project,grant CHNGNRL/JRP/1130.L. （）
