Effects on animal performance and sward composition of mixed and sequential grazing of permanent pasture by cattle and sheep

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dc.contributor.author Fraser, Mariecia D.
dc.contributor.author Davies, D. Arthur
dc.contributor.author Vale, James Edward
dc.contributor.author Hirst, W. M.
dc.contributor.author Wright, I. A.
dc.date.accessioned 2009-07-10T08:54:24Z
dc.date.available 2009-07-10T08:54:24Z
dc.date.issued 2007-07
dc.identifier.citation Fraser , M D , Davies , D A , Vale , J E , Hirst , W M & Wright , I A 2007 , ' Effects on animal performance and sward composition of mixed and sequential grazing of permanent pasture by cattle and sheep ' Livestock Science , pp. 251-266 . en
dc.identifier.other PURE: 109169
dc.identifier.other dspace: 2160/2623
dc.identifier.uri http://hdl.handle.net/2160/2623
dc.description Fraser, M. D., Davies, D. A., Vale, J. E., Hirst, W. M., Wright, I. A. (2007). Effects on animal performance and sward composition of mixed and sequential grazing of permanent pasture by cattle and sheep. Livestock Science, 110, (3), 251-266. Sponsorship: UK Department for Environment, Food and Rural Affairs and the Scottish Executive Environment and Rural Affairs Department. en
dc.description.abstract revious experiments have shown that mixed or conjoint grazing, when two or more animal species are grazed together, can lead to improved performance of one or more of the species and a higher total output per unit area. Sequential grazing systems, when different animal species graze an area in succession, also have the potential to improve productivity. This experiment directly compared these two approaches for integrating the grazing of cattle and sheep when pastured on improved permanent pasture. Four treatments were compared: 1) sheep only from May to October (S/S); 2) cattle only from May to July followed by sheep only from August to October (C/S); 3) cattle and sheep from May to July, sheep only for the rest of the growing season (C + S/S); and 4) cattle and sheep from May to October (C + S/C + S). Each treatment was replicated three times. From May until weaning at the end of July the plots were grazed by steers and ewes and lambs, and from weaning until October by steers and lambs. Sward heights were maintained at 6 cm using a “put and take” stocking system. Animal performance and sward composition data were collected during three growing seasons, 2001–2003. During the pre-weaning period lambs grazing plots which were grazed only by sheep had significantly poorer growth rates than those grazing plots where there was mixed grazing. Lambs grazing the sheep only plots also had lower liveweight gain during the post-weaning period, with the highest growth rates being recorded on the C + S/C + S treatment. Carrying capacity and total liveweight gain per unit area post-weaning were also consistently higher for the C + S/C + S treatment, while carrying capacity pre-weaning was highest for the C/S treatment. Measurements of clover content in the grazed horizon and botanical separation of material from quadrat cuts indicated that even under relatively controlled conditions choice of grazing system can influence sward composition. However, there was no clear link between any single sward change and the growth of the animals, indicating that the improved performance of cattle and sheep under mixed grazing is the result of a combination of factors, rather than a response to a particular sward parameter. en
dc.format.extent 16 en
dc.language.iso eng
dc.relation.ispartof Livestock Science en
dc.title Effects on animal performance and sward composition of mixed and sequential grazing of permanent pasture by cattle and sheep en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.livsci.2006.11.006
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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