Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15833 |
Nitrification is a minor source of nitrous oxide (N2O) in an agricultural landscape and declines with increasing management intensity | |
Di Liang; G. Philip Robertson | |
2021-08-30 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | The long-term contribution of nitrification to nitrous oxide (N2O) emissions from terrestrial ecosystems is poorly known and thus poorly constrained in biogeochemical models. Here, using Bayesian inference to couple 25 years of in situ N2O flux measurements with site-specific Michaelis–Menten kinetics of nitrification-derived N2O, we test the relative importance of nitrification-derived N2O across six cropped and unmanaged ecosystems along a management intensity gradient in the U.S. Midwest. We found that the maximum potential contribution from nitrification to in situ N2O fluxes was 13%–17% in a conventionally fertilized annual cropping system, 27%–42% in a low-input cover-cropped annual cropping system, and 52%–63% in perennial systems including a late successional deciduous forest. Actual values are likely to be <10% of these values because of low N2O yields in cultured nitrifiers (typically 0.04%–8% of NH3 oxidized) and competing sinks for available in situ. Most nitrification-derived N2O was produced by ammonia-oxidizing bacteria rather than archaea, who appeared responsible for no more than 30% of nitrification-derived N2O production in all but one ecosystem. Although the proportion of nitrification-derived N2O production was lowest in annual cropping systems, these ecosystems nevertheless produced more nitrification-derived N2O (higher Vmax) than perennial and successional ecosystems. We conclude that nitrification is minor relative to other sources of N2O in all ecosystems examined. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/337540 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Di Liang,G. Philip Robertson. Nitrification is a minor source of nitrous oxide (N2O) in an agricultural landscape and declines with increasing management intensity[J]. Global Change Biology,2021. |
APA | Di Liang,&G. Philip Robertson.(2021).Nitrification is a minor source of nitrous oxide (N2O) in an agricultural landscape and declines with increasing management intensity.Global Change Biology. |
MLA | Di Liang,et al."Nitrification is a minor source of nitrous oxide (N2O) in an agricultural landscape and declines with increasing management intensity".Global Change Biology (2021). |
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