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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 15 of 15 for “"lactation performance"”.
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Effect of Sensory Additives on Sow Lactation Performance, Subsequent Reproductive Performance, and Nursey Pig Performance
<p>Maximizing nutrient intake during lactation is vital to sow performance as well as litter performance. The aim of these studies was to evaluate the impact of a sensory additive on sow lactation performance and nursery pig performance. Five groups of sows were farrowed, three during winter …
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EFFECTS OF FEEDING A COMBINATION OF SYNTHETIC ZEOLITE A AND 25 HYDROXYVITAMIN D3 DURING THE PREPARTUM PERIOD ON MINERAL METABOLISM AND LACTATION PERFORMANCE OF HOLSTEIN DAIRY COWS
… affects health, reproduction, and milking performance. Although several effective strategies exist to regulate Ca metabolism, the interactions between Ca dynamics, inflammation, and dry matter intake remain poorly understood. This thesis investigates a combination of two commercially …
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Effect of dry period diets varying in energy density on health and performance of periparturient dairy cows: a study of dry matter intake, lactation performance, fertility, blood parameters and liver condition
… stalls. Dry matter intake (DMI) was registered, lactation performance, i.e. milk yield and milk composition were measured and analyzed, ovarian activity was estimated by measuring concentration of the hormone progesterone in milk. The metabolic status of the cows was monitored by collection and …
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Protein Nutrition of Dairy Cows During the Transition Period
… AMP in the prepartum period did not improve lactation performance. However, gross efficiency was improved by supplementation of AMP during lactation.
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Nutritional and environmental stressors and their effects on performance, metabolism, and the immune system of dairy cattle
… many stressful conditions that have an impact on lactation performance and overall animal health. These stress-related factors not only affect cattle wellbeing, but also have a vastly negative impact on the economic state of the dairy industry. For instance, heat stress (HS) can cost the dairy …
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Effects of Peripartal Supplementation of Yeast-Based Products on Performance, Rumen Fermentation Profile, and Circadian Rhythms in Dairy Cows
… and they have shown beneficial results on performance and rumen fermentation profile in dairy cows. This study aimed to evaluate the effects of a yeast-derived postbiotic prototype (PB) on lactation performance in dairy cows supplemented during the transition period until 60 DIM. Sixty-one …
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Evaluation of Dried and Wet Distillers Grains Included at Two Concentrations in the Diets of Lactating Dairy Cows
<p>The purpose of this study was to determine the lactation performance of dairy cows fed dried or wet distillers grains (DG) with solubles (DDGS or WDGS) at two dietary concentrations. Using 15 cows, a lactation trial was designed as a replicated 5 x 5 Latin square. Periods were 4 wk each, with …
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An assessment of the biotin needs of developing gilts and reproducing sows in a modern production system
… During the growing-finishing trials, feedlot performance, hair and soundness scores were unaffected by dietary treatment, however, SB elevated (P<.001) plasma biotin (PB) and reduced the number and frequency of various toe lesions. Conception rate and the weaning to estrus interval were …
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Growth Performance, Nutrient Utilization, and Metabolic Profile of Dairy Heifers Fed Diets High in Distillers Grains with Different Forage to Concentrate Ratios
… and onset of puberty, as well as post trial performance were investigated. First, a 16-wk feeding trial was conducted using 48 Holstein heifers to evaluate effects of dietary treatment on dry matter intake (DMI), average daily gain (ADG), growth performance, rumen fermentation, and nutrient …
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Evaluation of Supplementing Brewer's Yeast to Lactating Dairy Cows
… the dairy industry to improve animal health and performance. Yeast product supplementation can be beneficial in the diet of lactating dairy cows by increasing feed efficiency, alleviating disease, and improving production performance under heat stress. Objectives of this study were to evaluate …
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Utilizing near-infrared technology to assess changes in corn silage dry matter and the effects of feeding a starling resistant supplement to dairy cattle
… DM. Study 2 was designed to evaluate the lactation performance of post-peak dairy cattle when using a starling resistant grain supplement. Sixteen prim- and multiparous Holstein cows were housed individually in a tie-stall barn, milked 3x daily, and fed 2x daily. Cows were fed two …
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Reasons Why Cows Were Removed From the SDSU Fairy Herd 1. Discriminant Analysis to Classify Cows with or without Reproductive Problems
… estimates. Young sires are evaluated on first-lactation performance of this progeny, and any relationship with later performance of length of herd life would have an important bearing on the evaluations. Selection of highly productive cows without conscious emphasis on fertility will not lead …
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CHARACTERIZATION OF SENSOR AND NON-SENSOR COW, HERD MANAGEMENT, AND ENVIRONMENTAL DATA AND USE OF MACHINE LEARNING ALGORITHMS FOR PREDICTION OF PREGNANCY IN DAIRY CATTLE
… of multiple cow behavioral, physiological, and performance parameters collected by automated sensors before insemination for cows that became pregnant or not at FS. A secondary objective was to explore associations between pregnancy outcome at FS with previous gestation and early lactation …
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Effects of autolyzed yeast (saccharomyces cerevisiae) on feed degradability and digestibility; performance, rumen environment, and physiological biomarkers of Holstein cows fed a high starch diet
… energy density, are known to enhance animal performance. However, HS diets can have negative impacts on the animal when fed for an extended period, thus reducing animal productivity and performance. The addition of autolyzed yeast (AY) has been shown to have beneficial effects while feeding …
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Hybrid rye may partially or fully replace corn in diets fed to growing or reproducing swine
… pigs without negatively impacting growth performance. In experiment 1, 45 sows per treatment were fed diets in which 0, 25, 50, or 75% of corn was replaced with hybrid rye in corn-soybean meal control diets formulated for gestation or lactation. Results indicated no differences in average …