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Showing 1 to 20 of 35 for “"Dairy heifers"”.
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Feeding dairy heifers
no abstract provided by author
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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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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 …
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The energy requirements for the normal growth of dairy heifers
Text from introduction: "There are at least two reasons why more definite knowledge of the energy requirements of growing cattle are desirable. First, the energy requirement of the animal is known to be high and because of the increased cost of feeds with high energy value there is a greater …
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The response of growing dairy heifers to frequency of feeding
At least five million heifers are raised annually in the United States to maintain the dairy cattle population and provide for our future needs. These animals are in reality the very foundation of the dairy business and the prosperity of everyone connected with it are dependent, at least to a …
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Verification of equations to predict dry matter intake of dairy heifers
Diets of varying forage base were fed to dairy heifers to test the accuracy of an prediction equation to accurately predict dry matter intake (DMI). Heifers ranging from 120 to 430 kg body weight, were randomly assigned to treatments with forage bases of 1) 100% corn silage, 2) 75% corn silage : …
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Development of equations to predict dry matter intake of dairy heifers
… animals were developed with 118 Holstein heifers fed totally mixed rations (TMR). Animals grouped according to body weight (136, 227, 317 kg) were fed TMR (corn silage, ground hay, high moisture corn, soybean meal) once daily for 28 days. Rations were balanced to mean body weight according …
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Influence of Winter Housing Conditions on Growth Rates and Feed Consumption of Dairy Heifers
<p>It is important in dairy cattle management to maintain steady and continuous growth of heifers and thereby secure properly developed cows which will give the production that is expected of them when they are brought into the milking herd. In general, heifer calves during the first twelve months …
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Factors affecting growth of the conceptus in lactating dairy cows and non-lactating dairy heifers
Embryonic loss in dairy cows continues during the fifth and sixth weeks of pregnancy in lactating dairy cows. There is an association between smaller embryos and pregnancy loss during this period. The objective was to examine the potential factors that affect embryonic growth from day 33 to 45 of …
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Feeding Various Proportions of Ground Hay and Concentrates to Dairy Heifers and to Dairy Cows
Made available in DSpace on 2014-12-05T23:07:57Z (GMT). No. of bitstreams: 1 6001651.pdf: 3720069 bytes, checksum: 3b45c1ab40c3a9f39ecca98984f71b86 (MD5) Previous issue date: 1960
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Ovarian and Growth Hormone Regulation of Mammary Growth and Transcript Abundance in Prepubertal Dairy Heifers
… development in two to four month old Holstein heifers. In the second study, effects of bST on mammary growth and development, and also on putative stem cell population were evaluated by beginning bST treatment in one month old Holstein heifers. Mammary growth and development was determined by …
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Evaluation of the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using timed AI.
… response to GnRH; and pregnancy outcomes. Dairy heifers (n = 545) from three locations (Florida, Kansas, and Mississippi) were assigned randomly to each of two treatments: 1) 25 mg of PGF2α injection and insertion of previously used autoclaved CIDR on d 7 followed by 100 µg of GnRH …
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Influence of dietary component manipulation and feed management strategies on growth and rumen development of weaned dairy heifers
<p>Well-developed replacement heifers provide a central foundation for the continued success of the dairy industry. Emphasis on improving pre-weaned calf nutrition has predominated in the industry, but opportunities exist to improve post-weaning heifer nutrition and management. We aimed to evaluate …
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Effect of varying levels of neutral detergent fiber and total digestible nutrients on dry matter intake of dairy heifers
One hundred and eight Holstein dairy heifers were divided into two weight blocks based on beginning body weight (E = < 182 kg, light, > 270 kg, heavy). Heifers within weight blocks were randomly assigned to one of five treatments. Treatments consisted of three levels of NDF (35%, 45%, 55%) at 100% …
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Comparison of lactational and metabolic responses of postpartum dairy heifers and cows fed diets supplemented with corn, calcium stearate and tallow
Twenty first-calf heifers and 24 cows in their second or greater lactation were randomly assigned to 4 dietary treatments from day 15 to day 61 postpartum. Mixed diets consisted of corn silage, alfalfa haylage, orchard grass hay, and a pelleted concentrate. Concentrates were control (C), C + …
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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
… to evaluate the effect of limit-feeding heifers distillers grains with solubles (DDGS) with varying forage to concentrate ratios. The effects on growth, feed efficiency, rumen fermentation, nutrient digestibility, metabolic profile and onset of puberty, as well as post trial performance …
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Abundance and Localization of (Yes-associated protein) YAP in Prepubertal Bovine Mammary Tissue
… for future milk production, especially in dairy heifers. With advanced knowledge on fundamental aspects that govern prepubertal mammary development, scientists and farmers alike can ensure that heifers perform their best once they become cows. The Hippo pathway has been identified as an …
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METHANE MITIGATION, FEED EFFICIENCY, AND HEAT STRESSIN REPLACEMENT HEIFERS: NUTRITIONAL ANDMANAGEMENT APPROACHES FOR SUSTAINABLE DAIRYPRODUCTION
… effects of heat stress in Italian Holstein dairy heifers. The first study (Chapter 3) describes an in vivo trial evaluating the inclusion of increasing doses of lysozyme in the diet of dairy heifers to assess the effects of this antimicrobial enzyme on enteric methane production. The results …
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