Nitrous oxide emission, global warming potential, and denitrifier abundances as affected by long-term fertilization on Mollisols of Northeastern China
文献类型： 外文期刊
作者： Feng, Xiaomin 1 ; Gao, Hongjun 1 ; Lal, Rattan 3 ; Zhu, Ping 2 ; Peng, Chang 2 ; Deng, Aixing 1 ; Zheng, Chengyan 1 ; Son 1 ;
作者机构： 1.Chinese Acad Agr Sci, Key Lab Crop Physiol & Ecol, Minist Agr & Rural Affairs, Inst Crop Sci, Beijing 100081, Peoples R China
2.Jilin Acad Agr Sci, Changchun, Jilin, Peoples R China
3.Ohio State Univ, Sch Environm & Nat Resources, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA
关键词： Greenhouse gas emissions; climate change; organic manure; soil physicochemical properties; denitrification potential
期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）
ISSN： 0365-0340
年卷期： 2019 年 65 卷 13 期
页码：
收录情况： SCI
摘要： A long-term field experiment was performed to assess the effects of fertilization regimes on greenhouse gas emissions, soil properties, soil denitrifies, and maize (Zea mays) grain yield on Mollisols of Northeastern China. Chemical nitrogen (N), phosphorus (P), and potassium (K) fertilizers plus pig manure (MNPK) treatment significantly increased soil N2O emissions by 29.9-226.4% and global warming potential (GWP) by 29.8-230.7% compared to unfertilized control (CK), chemical N fertilizer only (N), chemical N, P, and K fertilizers (NPK) and chemical N, P, and K fertilizers plus corn straw (SNPK) treatments. However, the MNPK treatment yielded similar greenhouse gas intensity (GHGI) as compared with other treatments, mainly due to higher maize grain yield. There were also higher gene copy numbers of nirK, nirS, and nosZ in topsoil (0-20 cm depth) under MNPK treatment. Automatic linear modeling analysis indicated that main factors influencing soil N2O emissions were soil organic carbon (SOC), NO3- content, and nirK gene abundance. Although the application of chemical fertilizers plus organic manure increases N2O emissions due to higher N and C availability and nirK gene activity in the soil, this is still a promising fertilizer management due to its notable enhancement of maize grain yield and SOC content.
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