Milk production, milk composition, and reproductive function of dairy cows fed different fats

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Milk production, milk composition, and reproductive function of dairy cows fed different fats1

1Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, PO Box 90, Lennoxville, Quebec, Canada J1M 1Z3; 2Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Wales SY23 3EB, UK; 3Welsh Institute of Rural Studies, The University of Wales, Aberystwyth, Llanbadarn Campus, Aberystwyth, Ceredigion SY23 3AL, Wales, UK; and 4L’Alliance Boviteq Inc...

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Milk production and composition, ovarian function, and prostaglandin secretion of dairy cows fed omega-3 fats.

Four multiparous Holstein cows were used in a 4 x 4 Latin square experiment to study the effects of fat sources rich in omega-3 fatty acids on milk production and composition, follicular development, and prostaglandin secretion. All cows were fed a total mixed diet containing 60% grass silage and 40% concentrate. The four treatments were concentrates based either on Megalac, formaldehyde-treate...

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Digestion, milk production, milk composition, and blood composition of dairy cows fed formaldehyde treated flaxseed or sunflower seed.

Forty midlactation Holstein cows averaging 635 kg of body weight (SE = 8) were allotted at wk 25 of lactation to ten groups of four cows blocked for similar calving dates to determine the effects of formaldehyde treatment of flaxseed and sunflower seed on fatty acid composition of blood and milk, milk yield, feed intake, and apparent digestibility. Cows were fed a total mixed diet based on gras...

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Milk production and reproductive performance of dairy cows fed two concentrations of phosphorus for two years.

The performance of lactating Holstein cows in response to P supplementation was determined in a 2-yr study. Each year included confinement feeding for approximately the first two-thirds of lactation and grazing for the remaining one-third of lactation. In yr 1, 42 cows were assigned at calving to a low or high P diet within parity. Fourteen cows from the low P group and 16 cows from the high P ...

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Milk Production, Milk Fatty Acid Profiles and Blood Metabolites in Holstein Dairy Cows Fed Diets Based on Dried Citrus Pulp

The objective of the present study was to determine the effect of substitution of corn grain with dried citrus pulp (DCP) on milk composition, fatty acids profiles and blood metabolites in Holstein dairy cows. These parameters were measured in a replicated 4 × 4 latin square design experiment using eight Holstein cows. Each experimental period lasted 4 weeks. The four treatments were: control (...

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ژورنال

عنوان ژورنال: Canadian Journal of Animal Science

سال: 2001

ISSN: 0008-3984,1918-1825

DOI: 10.4141/a00-096