Technical Papers

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Alfalfa baleage with increased concentration of nonstructural carbohydrates supplemented with a corn-based concentrate did not improve production and nitrogen utilization in early lactation dairy cows.

Source: US National Library of Medicine Brito AF1, Tremblay GF2, Bertrand A2, Castonguay Y2, Bélanger G2, Michaud R2, Lafrenière C3, Martineau R4, Berthiaume R5. 1. University of New Hampshire, Department of Biological Sciences, Durham 03824. 2. Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec City, QC, Canada G1V 2J3. 3. Université

Use and perceptions of on-farm emergency slaughter for dairy cows in British Columbia

Source: UBC Dairy Education & Research Centre When farm animals become injured, farmers must decide whether to treat, transport, euthanize, or use on-farm emergency slaughter (OFES). OFES is one end-of-life option for animals that cannot be transported humanely but are fit for human consumption. OFES is allowed in the European Union as well as in several

Reducing whole-farm surpluses of phosphorus and potassium in intensive livestock operations:

Source: University of Manitoba A case study of dairy farms Team: Project Leader:  Dr. Kees Plaizier, Dept. Animal Science, Email: Co-Investigators: Dr. Kim Ominski (U of M), Dr. Don Flaten (U of M), Rob Barrie (MAFRI), Clay Sawka (MAFRI) Industry Partner: Dairy Farmers of Manitoba Funding: DFM, MRAC and MLMMI. Goal: The goal of

A practical look at contagious mastitis

Source: National Mastitis Council Introduction Pathogenic microorganisms that most frequently cause mastitis can be divided into two groups based on their source: environmental pathogens and contagious pathogens. The major contagious pathogens are Streptococcus agalactiae, Staphylococcus aureus, and Mycoplasma spp. With the exception of some mycoplasmal infections that may originate in other body sites and spread systemically,

Using body condition scoring in dairy herd management

Source: Ontario Ministry of Agriculture, Food and Rural Affairs Fact Sheet written by: R. Parker – Dairy Cattle Specialist/OMAFRA Introduction There are six key times during the yearly cycle when each cow should have her condition evaluated. These occur: midway through the dry period, at calving, and at approximately 45, 90, 180 and 270 days into

Relationships among postpartum body condition score change and productive and reproductive performance in Alberta dairy cows

Source: Alberta Agriculture and Forestry, M. Gobikrushanth2 , A. Behrouzi 1 , K. Macmillan 1 , and M. G. Colazo 1 1Livestock Research Section, Alberta Agriculture and Forestry, Edmonton, AB; 2Department of Agricultural Food and Nutritional Science, University of Alberta, Edmonton, AB; E-mail: BACKGROUND & OBJECTIVES It is recommended that cows calve with a

Replacing canola meal as the major protein source with wheat dried distillers’ grains alters omasal fatty acid flow and milk fatty acid composition in dairy cows

Source: Canadian Journal of Animal Science G. E. Chibisa, D. A. Christensen, T. Mutsvangwa Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, SK, Canada, S7N 5A8 Corresponding author: T. Mutsvangwa, (e-mail: Abbreviations: BH, biohydrogenation; CF, crude fat; CLA, conjugated linoleic acid; CM, canola meal;DM, dry matter; FA, fatty acids; GLC, gas liquid

Elimination of selected mastitis pathogens during the dry period

Source: Journal of Dairy Science Anri A.E. Timonen, Jørgen Katholm, Anders Petersen, Toomas Orro, Kerli Mõtus, Piret Kalmus ABSTRACT We aimed to evaluate the elimination of 4 different mastitis pathogens, Streptococcus agalactiae, Mycoplasma bovis, Staphylococcus aureus, and Streptococcus uberis, from infected udder quarters during the dry period using quantitative PCR. The second purpose of this study was to evaluate the

Adoption and consistency of application of premilking preparation in Ontario dairy herds

Source: Journal of Dairy Science E. Belage, S. Dufour, D.A. Shock, A. Jones-Bitton, D.F. Kelton ABSTRACT Milking management practices that affect udder health have been widely studied, leading to a variety of evidence-based recommendations. Lack of adoption or inconsistency in milking practices can interfere with efforts to prevent mastitis in the herd. The study objective was to assess the

Pair housing the milk-fed calf

Source: University of British Columbia Previous research on milk-fed calves has shown that calves are highly motivated to consume at least twice as much milk as they have traditionally been provided (i.e. approximately 8 versus 4 L/d). When allowed to consume more milk calves gain weight more quickly and are less hungry. Faster growing calves turn into faster growing heifers – they are

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