Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2963 |
Hotspots of soil N2O emission enhanced through water absorption by plant residue | |
Kravchenko, A. N.1; Toosi, E. R.1; Guber, A. K.1; Ostrom, N. E.2,3; Yu, J.4; Azeem, K.5; Rivers, M. L.6; Robertson, G. P.1,7 | |
2017-07-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China; Pakistan |
英文摘要 | N2O is a highly potent greenhouse gas and arable soils represent its major anthropogenic source. Field-scale assessments and predictions of soil N2O emission remain uncertain and imprecise due to the episodic and microscale nature of microbial N2O production, most of which occurs within very small discrete soil volumes. Such hotspots of N2O production are often associated with decomposing plant residue. Here we quantify physical and hydrological soil characteristics that lead to strikingly accelerated N2O emissions in plant residue-induced hotspots. Results reveal a mechanism for microscale N2O emissions: water absorption by plant residue that creates unique micro-environmental conditions, markedly different from those of the bulk soil. Moisture levels within plant residue exceeded those of bulk soil by 4-10-fold and led to accelerated N2O production via microbial denitrification. The presence of large (circle divide > 35 mu m) pores was a prerequisite for maximized hotspot N2O production and for subsequent diffusion to the atmosphere. Understanding and modelling hotspot microscale physical and hydrologic characteristics is a promising route to predict N2O emissions and thus to develop effective mitigation strategies and estimate global fluxes in a changing environment. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404621000011 |
WOS关键词 | NITROUS-OXIDE EMISSIONS ; HOT MOMENTS ; HETEROGENEOUS DISTRIBUTION ; CARBON-DIOXIDE ; DENITRIFICATION ; PORE ; MANAGEMENT ; GRASSLAND ; FLUXES ; CROPS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/34761 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Michigan State Univ, Dept Plant Soil & Microbial Sci, E Lansing, MI 48824 USA; 2.Michigan State Univ, Dept Integrat Biol, E Lansing, MI 48824 USA; 3.Michigan State Univ, DOE Great Lakes Bioenergy Res Inst, E Lansing, MI 48824 USA; 4.Hubei Univ, Fac Resources & Environm Sci, Wuhan 430052, Peoples R China; 5.Univ Agr, Dept Agron, Peshawar 25130, Khyber Pakhtunk, Pakistan; 6.Univ Chicago, Argonne Natl Lab, Ctr Adv Radiat Sources, Argonne, IL 60439 USA; 7.Michigan State Univ, WK Kellogg Biol Stn, Hickory Corners, MI 49060 USA |
推荐引用方式 GB/T 7714 | Kravchenko, A. N.,Toosi, E. R.,Guber, A. K.,et al. Hotspots of soil N2O emission enhanced through water absorption by plant residue[J]. NATURE GEOSCIENCE,2017,10(7). |
APA | Kravchenko, A. N..,Toosi, E. R..,Guber, A. K..,Ostrom, N. E..,Yu, J..,...&Robertson, G. P..(2017).Hotspots of soil N2O emission enhanced through water absorption by plant residue.NATURE GEOSCIENCE,10(7). |
MLA | Kravchenko, A. N.,et al."Hotspots of soil N2O emission enhanced through water absorption by plant residue".NATURE GEOSCIENCE 10.7(2017). |
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