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.
Results
Showing 1 to 20 of 108 for “"Lactating dairy cows"”.
-
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. …
-
Increasing estrus expression in lactating dairy cows
… before inducing luteolysis or (2) exposing cows to estradiol cypionate (ECP) or testosterone propionate (TP) after luteolysis would increase occurrence and intensity of estrus. In experiment 1, cows (n = 154) were fitted with an AMS collar and a pressure-sensitive, rump-mounted device (HW) …
-
Urea-N Recycling in Lactating Dairy Cows
… 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 concentrations arranged in a factorial design (10.0 and 12.5% RDP and 5.6 and 8.1% RUP as a percentage of DM). The 10.0% RDP diets resulted in greater …
-
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.
-
Simple versus complex ration for lactating dairy cows
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science, 1931
-
Grazing and Feeding Management of Lactating Dairy Cows
… to determine time patterns of grazing between cows supplemented with different forms and amounts of corn. Also rumen fermentation parameters were measured in cows supplemented with two different types of corn. In study 2, milk yield was measured when grazing pasture was supplemented to …
-
Grouping and feeding policies for lactating dairy cows
… matter intake and milk production in Holstein dairy cows. Equations predicting 4% FCM and dry matter intake were derived from this data using ordinary least squares. Days in milk, available nutrients, calving date, and previous period 4% FCM accounted for 90% of the variation in 4% FCM for …
-
Evaluation of Supplementing Brewer's Yeast to Lactating Dairy Cows
… used as effective, natural feed additives in 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. …
-
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 …
-
Improving estimations of phosphorus bioavailability for lactating dairy cows
… impact if fed in excess. Increased P intake in dairy cows leads to increased fecal excretion of P and a reduction in efficiency of use. Variability in P concentration or availability in feedstuffs can exacerbate P excretion. To investigate variability in P between and within feedstuffs, 170 feed …
-
Starch Digestion and Phosphorus Excretion in Lactating Dairy Cows
… ruminal phytase activity were evaluated in eight lactating cows (113 DIM). Four cows were ruminaly cannulated. Cows were randomly assigned to treatments in a duplicated 4x4 Latin square with four, 18-d periods. Diets included dry ground corn (DG) or steam flaked corn (SF), with a no supplemental P …
-
An evaluation of supplemental methionine sources for lactating dairy cows
… method for increasing supplies of MP-Met to dairy cows to increase milk protein production is to feed rumen-protected Met ( RP-Met) products; however, not all RP-Met products are absorbed by the dairy cow in the same manner. Universally acceptable methods must be developed to determine the …
-
Utilization of wheat straw in rations for lactating dairy cows.
… chopped wheat straw for alfalfa in diets for lactating dairy cows. The results of these trials have shown that in complete mixed diets or diets containing long alfalfa hay, replacement of half of the alfalfa in rations containing 45% roughage for lactating dairy cows with chopped wheat straw …
-
Nitrogen Efficiency and Regulation of Protein Synthesis in Lactating Dairy Cows
Dairy herds are major contributors to N pollution because 70% of the N intake is lost to the environment and 30% or less is retained in milk protein. Plasma amino acids (AA) that are not used for protein synthesis in mammary glands (MG) are catabolized in post splanchnic tissues (liver plus …
-
The Feeding Value of Corn Distillers Solubles for Lactating Dairy Cows
<p><strong>Fifteen Holstein cows (10 multiparous and 5 primiparous) in early to midlactation (79.3 ± 9.2, DIM) were used in a replicated 5 x 5 Latin square design with 4-wk periods to evaluate and compare the use of condensed corn distillers solubles (CCDS) and dried distillers grains with solubles …
-
Feeding Value of Brown-Midrib Corn Silage for Lactating Dairy Cows
… (N) genetic counterpart using ten Holstein cows per group averaging 6 wk post-partum at the start of the experiment. The cow were fed corn silage (bm<sub>3 </sub>or N) ad libitum, 2.25 kg alfalfa hay/hd and grain (1 kg/3 kg milk produced) dairy. The bm<sub>3</sub> and N, respectively. Milk …
-
Controlling reproductive hormone levels to optimize fertility in lactating dairy cows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
-
Metabolic and endocrine adaptations to heat stress in lactating dairy cows
… intake. Previous studies comparing heat-stressed lactating cows with control group pair-fed (PF) to the intake of HS group but housed in thermoneutral conditions, in order to eliminate the confounding factors result from differentiated feed intakes, showed that HS increased circulating insulin and …
-
Evaluating fish meal as a protein source for lactating dairy cows
… exerts its effect on milk composition of dairy cows. Production Study One measured the effect of increased fishmeal intake on milk production and milk composition in dairy cattle. Milk fat percentage and yield were decreased by increased fishmeal intake. This decrease was not associated …
Page 1 of 6