DOI: 10.1007/s10533-015-0074-7
Scopus记录号: 2-s2.0-84939957208
论文题名: Evidence for nitrogen accumulation: the total nitrogen budget of the terrestrial biosphere of a lowland agricultural catchment
作者: Worrall F. ; Howden N.J.K. ; Burt T.P.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 123, 期: 3 起始页码: 411
结束页码: 428
语种: 英语
英文关键词: Fluvial nitrogen
; N2
; Nitrate
; Total N
英文摘要: Several national-scale studies have shown that reactive N is accumulating in developed countries even when only the terrestrial biosphere is considered. However, none of these studies was able to consider the total N budget and so any discrepancy in budgets could be dismissed as being accounted for by N2 exchange. This study considered a large (9,948 km2), mixed agricultural catchment where records of N flux, land use, climate and population go back at least to 1883. The N inputs were: biological nitrogen fixation, food and feed transfers, atmospheric deposition and inorganic fertilizers. The N outputs were atmospheric emissions (NH3, N2O, NO, N2), direct waste losses and fluvial losses at the soil source. The results showed that, prior to the large-scale use of inorganic fertilizers, the total N budget of the catchment was at steady state with only a small net loss of total N. After the widespread introduction of inorganic fertilizers, the balance of the catchment shifts in favour of the net accumulation. Even accounting for losses to groundwater, the catchment was found to have accumulated 315 ktonnes N (315 tonnes/km2) at a rate of 5.5 tonnes N/km2/yr (55 kg N/ha/yr) over 35 years since 1973. We propose that the accumulation of N could be occurring in subsoils of the catchment. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83525
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Earth Sciences, Science Laboratories, South Road, Durham, United Kingdom; Department of Civil Engineering, University of Bristol, Queen’s Building, University Walk, Bristol, United Kingdom; Department of Geography, Science Laboratories, South Road, Durham, United Kingdom
Recommended Citation:
Worrall F.,Howden N.J.K.,Burt T.P.. Evidence for nitrogen accumulation: the total nitrogen budget of the terrestrial biosphere of a lowland agricultural catchment[J]. Biogeochemistry,2015-01-01,123(3)