我国农田氧化亚氮排放的时空特征及减排途径

严圣吉, 尚子吟, 邓艾兴, 张卫建

Spatiotemporal Characteristics and Reduction Approaches of Farmland N2O Emission in China

Yan Shengji, Shang Ziyin, Deng Aixing, Zhang Weijian

图3 土壤N2O排放的关键过程（a）和主要影响因素（b） AMO：氨单加氧酶,HAO：羟胺氧化还原酶,NXR：亚硝酸盐氧化还原酶,NR：硝酸盐还原酶,Nar/Nap：硝酸异化还原酶,NrfA：细胞色素C亚硝酸盐还原酶,NiRK：含铜的亚硝酸盐还原酶,NiRS：含有细胞色素cd1的亚硝酸盐还原酶,NOR：NO还原酶,NOS：N2O还原酶,“ ”表示正效应,“ ”表示负效应,“ ”表示正效应和负效应并存

Fig.3 Key processes (a) and influencing factors (b) of soil N2O emissions AMO: ammonia monooxygenase, HAO: hydroxylamine oxidoreductase, NXR: nitrite oxidoreductase, NR: nitrate reductase; Nar/Nap: membrane-bound nitrate reductase/periplasmic nitrate reductase, NrfA: cytochrome C nitrite reductase, NiRK: copper-containing nitrite reductase, NiRS: cytochrome cd1 nitrite reductase, NOR: nitric oxide reductase, NOS: nitrous oxide reductase, “ ” represents a positive effect, “ ” represents a negative effect, “ ” represents the coexistence of positive and negative effects