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Associations between herd-level feeding and housing management practices, ration characteristics and production of free-stall housed dairy cows

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dc.contributor.advisor DeVries, Trevor
dc.contributor.author Sova, Amy
dc.date.accessioned 2013-04-25T19:12:27Z
dc.date.available 2013-04-25T19:12:27Z
dc.date.copyright 2013-04
dc.date.created 2013-04-17
dc.date.issued 2013-04-25
dc.identifier.uri http://hdl.handle.net/10214/6580
dc.description.abstract A cross sectional study of 22 commercial free stall farms was conducted to investigate associations between feeding and housing practices, ration variability, and measures of productivity of group-housed dairy cows. Farms were visited for 7 consecutive days in both summer and winter to collect measures related to management, milk production, environment, and ration characteristics. Feeding 2x/d compared to 1x/d was associated with greater group-average milk yield, DMI and less sorting against long particles. Provision of increased feed bunk space was associated with increased milk fat% and lower group-average SCC. Higher daily variability in energy content and % long particles in the ration was associated with lower group-average milk yield and efficiency of milk production. Overall, these results suggest that herd-level feeding and housing practices which increase access to consistent feed can improve group-level productivity and ultimately improve herd profitability. en_US
dc.description.sponsorship Dairy Farmers of Ontario, Canadian Dairy Commission, Agriculture and Agri-food Canada, OMAFRA, Canadian Foundation for Innovation, Ontario Research Fund en_US
dc.language.iso en en_US
dc.subject dairy cows en_US
dc.subject feed sorting en_US
dc.subject feeding management en_US
dc.subject milk production en_US
dc.title Associations between herd-level feeding and housing management practices, ration characteristics and production of free-stall housed dairy cows en_US
dc.type Thesis en_US
dc.degree.programme Animal and Poultry Science en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Animal and Poultry Science en_US
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