Fish meal supplementation to early lactation Jersey cows grazing ryegrass pasture

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dc.contributor.author Malleson, E.R. (Evelyn Rhoda)
dc.contributor.author Meeske, R.
dc.contributor.author Erasmus, L.J. (Lourens Jacobus)
dc.contributor.author Van Niekerk, Willem A.
dc.contributor.author Coertze, R.J. (Roelof Johannes)
dc.date.accessioned 2009-04-15T08:40:17Z
dc.date.available 2009-04-15T08:40:17Z
dc.date.issued 2008
dc.description.abstract This trial was conducted to test the hypothesis that early lactation cows grazing ryegrass pasture and receiving maize and mineral supplementation could respond to additional supplementation with a protein source such as fish meal. Multiparous Jersey cows in early to mid lactation that grazed annual ryegrass pasture in spring were used in a randomised complete block design experiment. In addition to the pasture, cows received 6 kg (as is) of a maize-based supplement, including minerals, fed in two equal portions in the milking parlour. Three groups of 15 cows received a control, a low fish meal or a high fish meal treatment (0, 4 or 8% fish meal replacing maize). Milk yield was measured and milk samples taken fortnightly. A simultaneous study on rumen fermentation was conducted using eight rumen cannulated cows receiving the control and high fish meal treatments in a cross-over design experiment. Ruminal pH and ammonia-N and volatile fatty acid concentrations were measured. Milk yield, 4% fat-corrected milk yield and milk fat and protein percentages of cows on the low and high fish meal treatments (21.9 and 22.1 kg milk/d, 24.1 and 24.2 kg 4% fat corrected milk/d, 4.73 and 4.67% fat and 3.49 and 3.45% protein) were higher than the control (20.5 kg milk/d, 20.4 kg 4% fat corrected milk/d, 3.97% fat and 3.25% protein). The ruminal ammonia-N concentration was higher in the cows on the high fish meal treatment than the control (16.7 vs. 14.2 mg/dL). Fish meal supplementation to cows on ryegrass proved to be profitable. en_US
dc.identifier.citation Malleson, ER, Meeske, R, Erasmus, LJ, Van Niekerk, WA & Coertze, RJ 2008, 'Fish meal supplementation to early lactation Jersey cows grazing ryegrass pasture', South African Journal of Animal Science, vol. 38, no. 4, pp. 331-341. [http://www.sasas.co.za/] en_US
dc.identifier.issn 0375-1589
dc.identifier.uri http://hdl.handle.net/2263/9636
dc.language.iso en en_US
dc.publisher South African Society for Animal Science en_US
dc.rights South African Society for Animal Science en_US
dc.subject Cultivated pasture en_US
dc.subject RUP en_US
dc.subject Maize en_US
dc.subject.lcsh Dairy cattle -- Nutrition en
dc.subject.lcsh Corn as feed en
dc.subject.lcsh Milk yield en
dc.subject.lcsh Milk composition en
dc.subject.lcsh Fish meal as feed en
dc.subject.lcsh Jersey cattle -- Feeding and feeds en
dc.subject.lcsh Ryegrasses en
dc.subject.lcsh Pastures en
dc.subject.lcsh Grazing -- Research en
dc.subject.lcsh Lactation en
dc.title Fish meal supplementation to early lactation Jersey cows grazing ryegrass pasture en
dc.type Article en


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