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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Assessing the benefits and wider costs of different N fertilisers for grassland agriculture

Texto completo
Autor(es):
Carswell, Alison [1] ; Shaw, Rory [2] ; Hunt, John [1] ; Rafael Sanchez-Rodriguez, Antonio [2, 3] ; Saunders, Karen [1] ; Cotton, Joseph [2] ; Hill, Paul W. [2] ; Chadwick, Dave R. [2] ; Jones, Davey L. [2] ; Misselbrook, Tom H. [1]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Rothamsted Res, Sustainable Agr Sci, North Wyke, Devon - England
[2] Bangor Univ, Sch Environm Nat Resources & Geog, Bangor, Gwynedd - Wales
[3] Univ Cordoba, Dept Agron, ETSIAM, Cordoba - Spain
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: ARCHIVES OF AGRONOMY AND SOIL SCIENCE; v. 65, n. 5, p. 625-639, APR 16 2019.
Citações Web of Science: 1
Resumo

Fertiliser nitrogen (N) is essential for maintaining agronomic outputs for our growing population. However, the societal, economic and environmental impacts of excess reactive N from fertiliser is rarely assessed. Here the agronomic, economic and environmental efficacy of three N-fertiliser sources, ammonium-nitrate (AN), urea (U), and inhibited-urea (IU; with NPBT) were evaluated at two grassland sites. Dry matter yield and herbage quality were measured at each silage-cut. Additionally, NH3-N and N2O-N losses were measured and used to calculate the effective N source cost and externality costs, which account for associated environmental and societal impacts. We found no effect of different N sources on yield or herbage quality. However, NH3-N emissions were significantly reduced under the IU treatment, by 48-65%. No significant differences in cumulative N2O emissions were observed. Incorporating externality costs increased fertiliser prices by 1.23-2.36, 6.51-16.4, and 3.17-4.17 times the original cost, for AN, U and IU, respectively, transforming U from the cheapest, to the most expensive of the N sources examined. However, with no apparent yield differences between N-fertiliser sources there is no economic incentive for the land-manager to use the more environmentally and socially acceptable option, unless externality costs are incorporated into fertiliser prices at the point of sale. (AU)

Processo FAPESP: 15/50305-8 - A virtual joint centre to deliver enhanced nitrogen use efficiency via an integrated soil-plant systems approach for the UK & Brazil
Beneficiário:Ciro Antonio Rosolem
Linha de fomento: Auxílio à Pesquisa - Temático