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Showing 1 to 20 of 162 for “"holstein cows"”.
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A digestion trial with two Holstein cows
… data is given of a digestion trial made with two Holstein cows, one being feed maintenance ration plus protein, the other maintenance ration plus carbohydrate. The digestive co-efficient of both cows were about normal. The cow which received the maintenance ration plus B. Albumen digested 67.87% …
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Physiological Responses of Holstein Cows to Three Superovulatory Methods
A study was conducted on 42 Holstein cows to: (1) assess the superovulatory efficacy of continuous follicle stimulating hormone (FSH) administration subcutaneously (SC) via osmotic pumps, (2) assess the benefits of gonadotropin releasing hormone (GnRH) administration on the day of expected estrus …
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Analysis of early lactation reproductive characteristics in Holstein cows
… aspiration was used to obtain oocytes from cows to study follicular development and oocyte morphology. Follicular aspiration was conducted once during wk 1 to 12 postpartum on 120 lactating cows with 6 groups, separated by biweekly intervals. Approximately one half of the aspirated cows at …
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Dietary Energy Restriction During Late Gestation in Multiparous Holstein Cows
Multiparous Holstein cows were used to determine the effects of diet, intake, and physiological state on hepatic mitochondrial camitine palmitoyltransferase (CPT) activity. In experiment 1, 30 cows were fed high grain (HG), high fat (HF), or high grain + high fat (HGF) diets from dry-off to …
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Reproduction and Endocrine Aspects of Early and Mid Lactation Holstein Cows
… and the quality of oocytes obtained from Holstein cows. Holstein cows were selected prior to calving and assigned to the early lactation (EL) group (n=8) while, cows at d 90 postpartum were selected for the mid-lactation (ML) group (n=7). Blood samples were taken twice weekly from 4 wk …
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Fecal consistency as related to dietary composition in lactating Holstein cows
… in lactating cattle. In Experiment 1, 30 cows (12 multiparous, 18 primiparous) were randomly assigned to one of six total mixed diet treatments through four 21 d periods. For Experiment 2, six primiparous cows were used in two 6 x 6 Latin squares to evaluate water consumption, apparent …
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Nitrogen and carbon balance of lactating Holstein cows during early and midlactation
Thirty six Holstein cows in their first, second, third or fourth lactation were used in 2 x 2 factorial design to evaluate nitrogen (N) and carbon (C) partitioning to milk, urine, feces, and body tissue during early and midlactation. Diets containing 16% CP were formulated with 30 or 39% rumen …
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Interactions of Sires With Feeding and Management Factors in Illinois Holstein Cows
… on feeding and management practices in Illinois Holstein herds on official DHI and DHIR testing programs were obtained by questionnaires. Milk yield data were first lactation records, begun in 1973, of purebred or grade Holstein heifers. Part records were extended to 305-day records and then …
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Calcium and Phosphorus Metabolism in Jersey and Holstein Cows During Early Lactation
… Ca, is a common condition near parturition. All cows experience some degree of hypocalcemia. Maintenance of blood Ca within the acceptable range of 8 to 10 mg/dl is a balancing act between the demand for Ca for milk production and the cow's homeostatic mechanisms to maintain blood Ca. These …
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Biohydrogenation, postruminal flow, and apparent digestibility of dietary lipids in lactating Holstein cows
Lactating cows with cannulae in the rumen and proximal duodenum were used in two 4 X 4 Latin square experiments to evaluate biohydrogenation, flow rates, and digestibility of dietary fatty acids in the gastrointestinal tract. In the first experiment, four cows were fed diets with 0% supplemental …
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Periconceptional Heat Stress of Holstein Cows Affects Subsequent Production Parameters Measured During Adulthood
… between the heat stress-conceieved (HSC) cows and thermoneutral-conceived (TNC) cows. National Dairy Herd Improvement Association data was obtained from Dairy Records Management Systems. Records (n =14,189,891) included cows born between 1977 and 2010 in FL, GA, SC, MS, LA, AL, and TX. …
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Environmental, Nutritional, and Physiological Factors Associated with Hoof Growth and Wear in Holstein Cows
… and wear were evaluated using data from 140 Holstein cows in five herds. Growth and wear of the dorsal and lateral regions of the front and rear outside claws were measured at approximately 2 mo intervals over a 14 mo period. Housing facilities varied from continuous confinement on concrete …
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Feeding native rumen microbial supplements increases energy-corrected milk and feed efficiency in holstein cows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Impact of nutritional strategies on immunometabolic biomarkers, reproductive tract physiology and health of Holstein cows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Reproductive performance of Holstein cows treated with prostaglandin F2a, gonadotropin releasing hormone, and recombinant bovine Somatotropin
… insemination (TAI) protocol in lactating dairy cows. A further objective included the evaluation of the efficacy of the Early Conception Factor (ECF) test kit. Recombinant bST may offer some benefit when used in conjunction with estrus synchronization and TAI. Presynchronization treatment …
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Effects of Energy Balance on Ovarian Activity and Recovered Oocytes in Holstein Cows Using Transvaginal Follicular Aspiration
… recovered oocytes were evaluated in 20 lactating Holstein cows during two trial periods (fall/spring). Cows were randomly selected and assigned to one of two dietary treatments formulated so that cows consumed 3.6% BW (HE- 1.78 mcal/kg; n=6 in fall, n=5 in spring) and 3.2% BW (LE-1.52 mcal/kg; n= …
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Lactational and metabolic responses to Rumen-Mate® and sodium bicarbonate in diets of early lactation Holstein cows
Call number: LD2668 .T4 ASI 1988 M34
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