Extensification of grassland use in the Welsh uplands: sheep performance in years 1-6

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dc.contributor.author Morgan, Charlie T.
dc.contributor.author Fothergill, Mick
dc.contributor.author Davies, D. Arthur
dc.date.accessioned 2009-11-18T15:54:52Z
dc.date.available 2009-11-18T15:54:52Z
dc.date.issued 2001
dc.identifier.citation Morgan , C T , Fothergill , M & Davies , D A 2001 , ' Extensification of grassland use in the Welsh uplands: sheep performance in years 1-6 ' Grass and Forage Science , pp. 105-117 . , 10.1046/j.1365-2494.2001.00254.x en
dc.identifier.issn 0142-5242
dc.identifier.other PURE: 128735
dc.identifier.other dspace: 2160/3546
dc.identifier.uri http://hdl.handle.net/2160/3546
dc.description Fothergill, M., Davies, D. A., Morgan, C. T. (2001). Extensification of grassland use in the Welsh uplands: sheep performance in years 1-6. Grass and Forage Science, 56, (2), 105-117. Sponsorship: UK Ministry of Agriculture Fisheries and Food. en
dc.description.abstract An experiment was established in 1991 on a 25-year-old perennial ryegrass/bent (Lolium perenne L./Agrostiscapillaris L.)-dominated pasture in Wales to study the effects of reducing nutrient inputs to previously fertilized upland pasture. The effects of the removal of applications of (1) N (denoted by CaPK) (2) N, P and K (Ca) and (3) N, P, K, and Ca (Nil) were compared with a treatment which received applications of all four nutrients (CaPKN) over a 6-year period (1991–96) in a randomized block design replicated three times. The experiment was managed under a continuous variable stocking regime (ewes and lambs until weaning and ewes thereafter) maintaining a sward surface height of 4·0 cm throughout the grazing season. Although individual liveweight gain of the lambs was unaffected by the treatments, there was a significant reduction (P <0·05) in total lamb liveweight gain, ewe stocking rate and length of grazing season as a result of the withdrawal of nutrients. Over the 6 years total lamb liveweight gain was reduced by 17%, 32% and 45% and ewe stocking rate by 21%, 36% and 49% on treatments CaPK, Ca and Nil, respectively, compared with treatment CaPKN. The effect of withdrawing nutrient inputs on ewe stocking rate was progressive and by 1996 the Nil input treatment displayed a 63% reduction compared with the CaPKN treatment and this was also coupled with a 21-day reduction in length of the grazing season. During the post-weaning period, ewes from the Nil input treatment recorded a liveweight loss in 1995 and only a modest liveweight gain in 1996. This coupled with significantly lower body condition scores (P <0·01) of these ewes in the autumn indicated that the Nil input treatment could lead to reductions in reproductive performance. en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof Grass and Forage Science en
dc.title Extensification of grassland use in the Welsh uplands: sheep performance in years 1-6 en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1046/j.1365-2494.2001.00254.x
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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