Journal article
The Effect of Oilseeds in Diets of Lactating Cows on Milk Production and Methane Emissions
Journal of dairy science, Vol.85(6), pp.1509-1515
06/2002
Handle:
https://hdl.handle.net/2376/116172
PMID: 12146483
Abstract
Thirty-six lactating multiparous Holstein cows were assigned to diets that contained 2.3, 4.0, and 5.6% fat for an entire lactation to determine the effect of oilseeds on milk composition, production, and methane emissions. The diets were formulated so that whole cottonseeds and canola oilseeds provided equal amounts of added fat. Methane emissions were measured every 3 mo from two replicates of four cows per treatment using a room tracer approach. Dry matter intakes and yields of milk and FCM were greater for cows fed the diets containing oilseeds. Although the concentration of protein in milk was reduced, yields of both protein and fat tended to be increased by the addition of fat. Within the milk fat, the concentrations of C10, C12, C14:0, and C16:0 were reduced and concentrations of C18, C18:1, and trans-C18:1 were increased in response to dietary oilseeds. In serum, urea-N was increased by the dietary oilseeds. Supplementation of diets with oilseeds did not affect methane emissions but tended to increase the efficiency of milk produced per unit of methane emitted. A 1.7% addition of fat to the control diet from a combination of oilseed types increased yields of milk without reducing methane emission rates. The strategy of using unsaturated fats from oilseeds to substantially reduce methane emissions was ineffective, although yield of milk was increased.
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Details
- Title
- The Effect of Oilseeds in Diets of Lactating Cows on Milk Production and Methane Emissions
- Creators
- K.A Johnson - Department of Animal Sciences, Washington State University, Pullman 99164R.L Kincaid - Department of Animal Sciences, Washington State University, Pullman 99164H.H Westberg - Department of Civil and Environmental Engineering, Washington State University, Pullman 99164C.T Gaskins - Department of Animal Sciences, Washington State University, Pullman 99164B.K Lamb - Department of Civil and Environmental Engineering, Washington State University, Pullman 99164J.D Cronrath - Department of Animal Sciences, Washington State University, Pullman 99164
- Publication Details
- Journal of dairy science, Vol.85(6), pp.1509-1515
- Academic Unit
- Animal Sciences, Department of; Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Inc
- Identifiers
- 99900547605301842
- Language
- English
- Resource Type
- Journal article