Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"dairy heifer"”.
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Compatibility of biological and cultural control in dairy heifer group housing
… commercially available bedding materials in a heifer rearing facility in southern Minnesota in 2009 and 2010.
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Phenotypic and microbial influences on dairy heifer fertility and calf gut microbial development
Pregnancy loss and calf death can cost dairy producers more than $230 million annually. While methods involving nutrition, climate, and health management to mitigate pregnancy loss and calf death have been developed, one potential influence that has not been well examined is the reproductive …
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A Five State Survey of Heifer Management Practices on Dairy Farms and Virginia Custom Dairy Heifer Growing Operations
Two surveys evaluated heifer management practices in dairy herds and custom grower operations. The NC-119 Heifer Management Survey conducted through the North Central Regional Research Project 119 included 226 Holstein and 67 Jersey herds from MN, MO, PA, VA, and WA. Mean rolling herd average for …
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Factors Influencing the Amount of Time Spent By Cattle In Streams: Implications for TMDL Development
… systems were set up on two beef farms and three dairy heifer operations, and cattle activity in streams was recorded during daylight hours. Climatic data, pasture characteristics, feed characteristics, and farm management practices were collected from each site, and their relationships with the …
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Development of the induced gonadotropin surge mechanism in the prepubertal heifer
… longtitudinal study was performed in prepubertal heifer calves to determine when the individual components of the hypothalamic-pituitary-ovarian axis were capable of functioning. In study 1, the hypothalamus and anterior pituitary of prepubertal dairy heifers were challenged with exogenous …
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Estimating Bacterial Loadings to Surface Waters from Agricultural Watersheds
… of FC and Escherichia coli (EC) over time in: 1) dairy manure storage ponds and turkey litter storage sheds, 2) pasture and cropland soils to which dairy manure was applied, and 3) beef and dairy fecal deposits. The dairy manure storage ponds were sampled just under the pond surface. The FC and EC …
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Factors affecting estrogen excretion in dairy heifers
… assess factors affecting estrogen excretion in dairy heifers. The objective of the first study was to quantify estrogenic activity in feces and urine during the estrous cycle. Ten non-pregnant Holstein heifers were fed the same diet for 28 d. Plasma, feces, and urine samples were collected …
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Influence of feed efficiency ranking and maternal nutrition on gut microbiome, metabolome, and transcriptome in beef and dairy cattle
… used measure for feed efficiency in beef and dairy cattle. The first experiment was to determine differences in major ruminal bacteria and ruminal epithelium gene expression between most-efficient (M-eff) and least-efficient (L-eff) finishing beef cattle. Results indicated that superior feed …
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Improving Nutrient Utilization and Growth in Dairy Heifers
<p>Within a dairy enterprise, one major cost is raising young heifers. Optimizing feeding programs of dairy heifers is imperative for the sustainability and profitability of dairy operations. Studies have shown that preweaned calves fed milk replacers (MR) with crude protein (CP) concentrations …