Flavomycin's (RTM) influence on lactational responses and nutrient utilization in dairy cows.

Persistent Link:
http://hdl.handle.net/10150/186793
Title:
Flavomycin's (RTM) influence on lactational responses and nutrient utilization in dairy cows.
Author:
Arana, Marit Jay.
Issue Date:
1994
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A lactation trial (N = 34, multiparous; 29, primiparous) and a metabolic trial (N = 3), using lactating Holstein cows, were conducted to determine the effects of feeding varying amounts (0, 30, 60, 90 and 0, 75, 150 mg/d, respectively) of bambermycins (Flavomycin®) on production responses, reproduction and health, rumen fermentation patterns, and ruminal protein and fiber digestion in lactating cows. Flavomycin increased milk yields and milk fat and protein yields in multiparous cows (P < .05). Although dry matter intake (DMI) was increased in cows receiving Flavomycin, efficiency of milk production was also increased. Primiparous cows receiving 60 or 90 mg/d Flavomycin had fewer days open and a shorter calving interval than cows not fed Flavomycin (controls). Body condition score (BCS) and body weight (BW) of all cows were not affected significantly by feeding Flavomycin. Acetate:propionate ratios were significantly lower for cows fed Flavomycin compared to controls. Digestibilities of dry matter, crude protein, and acid detergent fiber were not affected significantly by Flavomycin. Total tract digestibility of neutral detergent fiber was significantly lower for cows fed 75 mg/d Flavomycin compared to controls. Cows receiving 75 mg/d Flavomycin had a higher (P < .05) proportion of bacterial crude protein in duodenal digesta than control cows. Flavomycin appears to be beneficial for increasing milk production efficiencies in multiparous lactating cows, but the mechanism of action remains to be clarified.
Type:
text; Dissertation-Reproduction (electronic)
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Animal Sciences; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Huber, J. Tal

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleFlavomycin's (RTM) influence on lactational responses and nutrient utilization in dairy cows.en_US
dc.creatorArana, Marit Jay.en_US
dc.contributor.authorArana, Marit Jay.en_US
dc.date.issued1994en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA lactation trial (N = 34, multiparous; 29, primiparous) and a metabolic trial (N = 3), using lactating Holstein cows, were conducted to determine the effects of feeding varying amounts (0, 30, 60, 90 and 0, 75, 150 mg/d, respectively) of bambermycins (Flavomycin®) on production responses, reproduction and health, rumen fermentation patterns, and ruminal protein and fiber digestion in lactating cows. Flavomycin increased milk yields and milk fat and protein yields in multiparous cows (P < .05). Although dry matter intake (DMI) was increased in cows receiving Flavomycin, efficiency of milk production was also increased. Primiparous cows receiving 60 or 90 mg/d Flavomycin had fewer days open and a shorter calving interval than cows not fed Flavomycin (controls). Body condition score (BCS) and body weight (BW) of all cows were not affected significantly by feeding Flavomycin. Acetate:propionate ratios were significantly lower for cows fed Flavomycin compared to controls. Digestibilities of dry matter, crude protein, and acid detergent fiber were not affected significantly by Flavomycin. Total tract digestibility of neutral detergent fiber was significantly lower for cows fed 75 mg/d Flavomycin compared to controls. Cows receiving 75 mg/d Flavomycin had a higher (P < .05) proportion of bacterial crude protein in duodenal digesta than control cows. Flavomycin appears to be beneficial for increasing milk production efficiencies in multiparous lactating cows, but the mechanism of action remains to be clarified.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineAnimal Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairHuber, J. Talen_US
dc.contributor.committeememberAx, Roy L.en_US
dc.contributor.committeememberDeNise, Sue K.en_US
dc.contributor.committeememberHoyer, Patricia B.en_US
dc.contributor.committeememberSwingle, R. Spenceren_US
dc.identifier.proquest9432859en_US
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