Effect of nitrogen and phosphorus fertilisation and their interaction on nitrogen-phosphorus ratio of grass

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Abstract

In many EU countries fertilisation of grassland with nitrogen (N) and phosphorus (P) is limited by legislation. In earlier research in grassland experiments usually one nutrient was varied and a non-limiting amount of the other was applied. The interaction of the effects of N and P has been less addressed. Additionally, grass is sometimes presumed to have a constant N:P ratio. In the Netherlands, in the period 1994 - 2003, four separate field experiments were undertaken on four soil types. In these field experiments permanent grassland was fertilised with different N and P levels over a period of five and six years. Phosphorus fertilisation level had a negative effect and N fertilisation level had a positive effect on N:P ratio. At higher N levels, the influence of P fertilisation was stronger. Over time the (negative) influence of P fertilisation level also became stronger. The influence of N did not change systematically over time. Both N and P fertilisation levels should be taken into account to estimate N:P ratio.
Original languageEnglish
Title of host publicationSustainable meat and milk productions from grasslands
EditorsB. Horan, D. Hennessy, M. O'Donovan, E. Kennedy, B. McCarthy, J.A. Finn, B. O'Brien
Place of PublicationCork
PublisherEuropean Grassland Federation EGF
Pages565-567
ISBN (Electronic)9781841706443
ISBN (Print)9781841706436
Publication statusPublished - 17 Jun 2018
Event27th European Grassland Federation General Meeting Cork (EGF 2018): Sustainable meat and milk production from grasslands - Cork, Ireland
Duration: 17 Jun 201821 Jul 2018
https://www.egf2018.com/

Publication series

NameEGF Grassland science in Europe
Volume23

Conference

Conference27th European Grassland Federation General Meeting Cork (EGF 2018)
CountryIreland
CityCork
Period17/06/1821/07/18
Internet address

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