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dc.contributor.authorCarpenter, D. A.
dc.contributor.authorO'Mara, Frank P.
dc.contributor.authorO'Doherty, John V
dc.date.accessioned2014-03-11T16:46:55Z
dc.date.available2014-03-11T16:46:55Z
dc.date.issued2004
dc.identifier.citationD.A. Carpenter, F.P. O’Mara, J.V. O’Doherty. The effect of dietary crude protein concentration on growth performance, carcass composition and nitrogen excretion in entire grower-finisher pigs. Irish Journal of Agricultural and Food Research 43: 227–236, 2004.en_GB
dc.identifier.issn0791-6833
dc.identifier.urihttp://hdl.handle.net/11019/560
dc.identifier.urihttp://www.teagasc.ie/research/journalarchives/vol43no22004fullpdfs.asp
dc.descriptionpeer-revieweden_GB
dc.description.abstractTwo experiments, a performance experiment (n = 72) and a nitrogen balance (n = 16) experiment were conducted to evaluate the effects of dietary crude protein (CP) concentration on growth performance, carcass characteristics and nitrogen excretion of pigs. Dietary CP concentrations in experimental diets (g/kg) were 207.5, 170, 150 and 122.5 for treatments 1, 2, 3 and 4, respectively, and were offered to individually-fed entire-male grower-finisher pigs (45 to 95 kg). The diets were formulated to contain 13.7 MJ digestible energy and 11 g total lysine/per kg. Synthetic lysine, methionine, threonine and tryptophan were added to achieve ideal protein status. There was a linear increase in food intake as CP concentration decreased (P < 0.05). There was a quadratic response in daily live-weight gain and food conversion ratio (P < 0.05) to the change in CP concentration (P < 0.05), with an improvement in daily gain and food conversion ratio occurring as CP concentration declined to 150 g/kg and a deterioration in these parameters thereafter. There was a linear decrease (P < 0.05) in lean meat proportion as CP concentration decreased. There was a linear decrease in urinary output (P < 0.05), urinary pH (P < 0.01) and slurry pH (P < 0.05) as dietary CP concentration decreased. There was a quadratic response in urinary nitrogen output (P < 0.05), total nitrogen output (P < 0.05) and N utilization as dietary CP decreased. In conclusion, a dietary CP level of 150 g/kg was optimal in terms of growth performance and reduced nitrogen excretion.en_GB
dc.language.isoenen_GB
dc.publisherTeagasc (Agriculture and Food Development Authority), Irelanden_GB
dc.relation.ispartofseriesIrish Journal of Agricultural and Food Research;vol 43
dc.subjectCrude proteinen_GB
dc.subjectExcretionen_GB
dc.subjectNitrogenen_GB
dc.subjectPigsen_GB
dc.titleThe effect of dietary crude protein concentration on growth performance, carcass composition and nitrogen excretion in entire grower-finisher pigsen_GB
dc.typeArticleen_GB
refterms.dateFOA2018-01-12T07:59:29Z


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