Contribution of Heterotrophic Nitrification to Nitrous Oxide Production in a Long-Term N-Fertilized Arable Black Soil

文献类型： 外文期刊

第一作者： Cai, Yanjiang

作者： Cai, Yanjiang;Wang, Lianfeng;Cai, Yanjiang;Ding, Weixin;Yu, Hongyan;Wang, Lianfeng;Zhang, Xilin

作者机构：

关键词： oxygen: 7782-44-7;urea: 57-13-6;argon: 7440-37-1;soil organic carbon;nitrogen fertilizer: agrichemical;fertilizer;nitrous oxide: 10024-97-2;production denitrification;forest soil;water-holding capacity;heterotrophic nitrification;arable black soil

期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： To understand the contribution of key microbial processes to nitrous oxide (N2O) emission in intensively cultivated black soil, laboratory incubation were conducted at 70% water-holding capacity (WHC) and 25 degrees C, using different gases (air, oxygen, or argon) within the headspace of the incubation chambers to evaluate gas inhibition effects. Arable black soil was sampled from an experimental field that has received urea since October 1979. Nitrification contributed to 57% of total N2O emission, of which as much as 67% resulted from heterotrophic nitrification. These data strongly suggest that high soil organic carbon concentrations and low pH values are more favorable to N2O production through heterotrophic, rather than autotrophic, nitrification. Nitrous oxide produced by denitrification accounted for 28% of the total N2O emission, and the nitrifier denitrification accounted for 15% of the N2O emitted from the tested soil. These findings indicate that heterotrophic nitrification was the primary N2O production process in the tested soil.

分类号： S

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