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Showing 1 to 20 of 332 for “"lactating"”.
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Carnitine for lactating dairy cows
… the effects of supplemental carnitine for lactating dairy cows. In the first experiment, carnitine (ca. 6 g/d) was administered into either the rumen or abomasum. Concentrations of carnitine in milk, plasma, liver, and urine increased similarly for both sites of carnitine administration. …
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Factors affecting growth of the conceptus in lactating dairy cows and non-lactating dairy heifers
… 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 pregnancy. Lactating Holstein and …
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Protein metabolism in the lactating sow
… feed intake and protein metabolism in the lactating sow. The primiparous sow exhibits poor appetite during the initial phase of lactation in relation to her requirements for production. The early phase of lactation is associated with a high plasma tryptophan to branched-chain amino acid …
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Increasing estrus expression in lactating dairy cows
Using an activity monitoring system (AMS) equipped with an accelerometer, 2 experiments were conducted to test the hypotheses that: (1) altering progesterone before inducing luteolysis or (2) exposing cows to estradiol cypionate (ECP) or testosterone propionate (TP) after luteolysis would increase …
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Biomonitoring polybrominated diphenyl ethers in lactating women
… determine the levels of PBDEs in breast milk of lactating women from the Seacoast region of New Hampshire and to examine potential relationships between PBDE levels in breast milk and stage of lactation, maternal characteristics, living environment and dietary intake. Forty women, ages 22 to 40, …
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Urea-N Recycling in Lactating Dairy Cows
This study was designed to determine the effect of rumen degradable protein (RDP) and rumen undegradable protein (RUP) on urea-N recycling and microbial N flow. Eight mid-lactation Holstein cows were assigned to a repeated 4 x 4 Latin square. The diets were isoenergetic with RDP and RUP …
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Niacin-lipid interactions in lactating dairy cows
Niacin-lipid interactions in lactating dairy cows were investigated. Treatments were: control, nicotinic acid (12 g/d), calcium salts of long chain fatty acids (3% diet dry matter), and calcium salts of fatty acids with nicotinic acid. Cows received treatment diets from week 2 to week 14 postpartum.
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Heat-Treated Soybean Proteins for Lactating Dairy Cattle
… improved their value slightly as a feed for lactating cows, but milk production by cows past peak production was not significantly greater than production achieved with conventional corn-soybean meal diets.</p>
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Simple versus complex ration for lactating dairy cows
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science, 1931
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Managing the lactating sow to stimulate lactation ovulation
… suckled litter size. A high incidence (24%) of lactating multiparous sows that received no stimulation spontaneously ovulated before weaning resulting in a prolonged weaning to oestrus interval. These results suggest that for the modern sow, weaning is not necessary for ovulation. Lastly, …
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Nitrogen and Water Metabolism in the Lactating Sow
Made available in DSpace on 2014-12-09T14:29:05Z (GMT). No. of bitstreams: 1 7000919.pdf: 4050623 bytes, checksum: 612520f67228183aefc29390f005a94d (MD5) Previous issue date: 1969
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Grazing and Feeding Management of Lactating Dairy Cows
… when grazing pasture was supplemented to lactating Holstein cows fed a typical TMR diet. Predominantly orchardgrass pastures with lesser amounts of white clover and Kentucky bluegrass were grazed during both studies. In Experiment 1, 36 Holstein cows were supplemented either with 6, 6, 6, …
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Grouping and feeding policies for lactating dairy cows
… were balanced for absolute amounts for simulated lactating cows using NRC requirements and 4% FCM and dry matter intake generated from the prediction equations. Relationships between 4% FCM and nutrient concentrations were determined for heifers and multiparous cows. These recommendations suggest …
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The Effect of Exercise on Lactating Sow Performance
… (LS) weaning wt (WW), and back fat (BF) of lactating sows housed in farrowing crates. A total of 24 sows were used in four trials. Body weight (BW), BF, BCS, SS, IS, and LS were recorded at placement into the farrowing barn and again at weaning. A scale of 1 (poor) to 5 (excellent) was used …
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Folate status and milk folate concentration in lactating women
Lactating women have an increased requirement for folate which contributes to their risk for suboptimal folate status. Although milk folate secretion appears to be maintained independent of folate intake and maternal folate status, studies with animal species have demonstrated a relationship …
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Evaluation of Supplementing Brewer's Yeast to Lactating Dairy Cows
… 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 supplementing a concentrated brewer’s yeast in the ration of a lactating dairy …
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Experimentally induced Escherichia coli mastitis in lactating primiparous cows
Escherichia coli (E. coli) is één van de voornaamste oorzaken van klinische mastitis bij hoogproductieve melkkoeien. De bacterie bezit geen specifieke virulentiefactoren met een rol in de pathogenese van de aandoening. De afweerreactie na experimenteel geïnduceerde E. coli mastitis werd reeds …
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Evaluation of systematic breeding programs in lactating dairy cows
Observing cows in estrus and inseminating them at the optimal time are necessary steps for effective reproductive management of a dairy herd. However, increasing herd sizes can lead to reproductive inefficiency resulting in decreased profits on dairy herds. Synchronization of estrus, through …
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Intramammary infection in rapidly growing, non-lactating mammary glands
Intramammary infections (IMI) are common in non-lactating heifer and dry cow mammary glands and occur during periods of appreciable mammary growth and development. The presence of these infections is expected to negatively impact mammary growth and development but has yet to be investigated. The …
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