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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 20 of 62 for “"Early Lactation"”.
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Analysis of early lactation reproductive characteristics in Holstein cows
… the aspirated cows at each session were from the early groups (wk 1-2, 3-4, or 5-6) and the other half from the later groups (wk 7-8, 9-10, or 11-12). On the day of aspiration the number of follicles on each ovary, and their sizes, small (2-5 mm), medium (6-10 mm) and large (≥ 11 mm), were …
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Bovine serum protein hormone concentration during late pregnancy, parturition and early lactation
Thesis (M.S.)--Michigan State University. Dept. of Dairy Science, 1972
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Calcium and Phosphorus Metabolism in Jersey and Holstein Cows During Early Lactation
… Ca, P, or Mg. Serum OC was higher in second lactation cows compared with cows entering their third or fourth lactation but OC was unaffected by treatment. Although results indicated a 60% increase in serum 25-OH due to a single oral dose of 25-OH prior to calving, the amount administered in …
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Effects of fermenten during the dry and early lactation periods of dairy cows
… prior to expected calving through 6 weeks of lactation. Dry matter intake of all diets decreased prior to calving, with the treatments significantly (P < 0.05) lower than the control diet. Decline in intake between wk 2 and wk 1 prepartum was 3.6%, 20.4% and 15.8% for the control, low and high …
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Evaluation of Urea and Dried Whey in Diets of Cows During Early Lactation
… rumen microbial protein synthesis to diets of early lactation cows</p>
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Flavor effects on feed consumption and performance of dairy cattle in early lactation
… of flavors on feed consumption of dairy cows in early lactation. Two sequential elimination trials, each with six multiparous Holstein cows, were conducted to test the effects of additives on the preference ranking of diets. Starting eight days postpartum cows were fed a total mixed ration (TMR) …
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Local regulation of increased milk yield due to early lactation increased milking frequency
Increased milking frequency (IMF) during early lactation increases milk yield not only during the IMF period, but also after the cow is returned to twice daily milking (2X). The increase in yield is locally regulated within the gland; however the mechanism for the increase in yield is unknown. The …
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The Physiology of Enhanced Milk Yield Through Increased Milking Frequency in Early Lactation
Increased milking frequency (IMF) in early lactation is a time and cost-effective farm management practice to enhance profit in the dairy industry. The process involves milking cows more often in early lactation alone. On farms that milk twice daily (2X), early lactation cows are milked four times …
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Extruded Blend of Soybean Meal and Sunflower Seeds for Dairy Cattle in Early Lactation
… as a protein and energy source for dairy cows in early lactation. Thirty Holstein cows (24 multiparos and 6 primiparous) were assigned to either a corn-oats-soybean meal concentrate (SBM) or a concentrate where soy-sunflower blend replaced all soybean meal and portions of corn and oats (SSF). Dry …
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Day-to-Day Variation in the Feed Consumption of Dairy Cows in Early Lactation
… flavor improved the energy balance of cows in early lactation and may reduce the risk of health or reproductive problems. Overall, the exponential model was consistently more accurate and robust than the current NRC equation. Together with cosinor model it explained most of the day-to-day …
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Evaluating the duration of increased milking frequency during early lactation for increased yield through lactation
Increasing the milking frequency of early lactation dairy cows increases their milk yield, both during increased milking and after the cows are returned to a normal twice-daily milking schedule. When milked four times a day (4X) for only the first twenty-one days of lactation, the right udder half …
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Effect of body condition and ration protein source on performance of high producing cows during early lactation
… ration ad libitum during the last 16-20 weeks of lactation. Cows fed the high energy ration ate more feed, produced more milk and gained more body condition than cows fed the low energy ration. Cows were fed to maintain condition during the dry period. During weeks 3-15 of the next lactation, half …
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Lactational and metabolic responses to Rumen-Mate® and sodium bicarbonate in diets of early lactation Holstein cows
Call number: LD2668 .T4 ASI 1988 M34
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Lactational and metabolic responses to Rumen-Mate® and sodium bicarbonate in diets of early lactation Holstein cows
Call number: LD2668 .T4 ASI 1988 M34
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Effect of rumen-protected methionine on placenta metabolism, animal performance, and immune-metabolism of dairy cows during the periparturient and early lactation periods
… period increased animal performance during early lactation, mitigated oxidative stress and inflammation, and enhanced liver and neutrophil function. Furthermore, MET upregulated utero-placental transport of nutrients, at least in part, through the mTOR pathway, and altered placenta …
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Effect of Forage Physical Form on Chewing Activity, Dry Matter Intake, and Rumen Function of Dairy Cows
… but has not been examined using dairy cows in early lactation. The purpose of this study was to determine effect of reducing FPS on production, chewing, and digesta kinetic parameters in early lactation dairy cattle and the influence small particle (SP) passage rate and large particle (LP) …
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Effects of dietary cation-anion difference (DCAD) and Na:K on dairy cows in early lactation, and the interaction of particle size reduction via mastication and rumination with digestion and passage in cattle
Cattle spend many hours per day chewing, either eating or ruminating. Comminution of feed and digesta particles affects the kinetics of digestion and passage, and can also affect voluntary feed intake. These, in turn, determine nutrient availability and productive efficiency. Our objective was to …
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Nutritional Management Strategies to Increase Energy Intake of Lactating Cows
… strategies to increase energy intake during early lactation were evaluated utilizing 71 Holstein dairy cows (34 primiparous and 3 7 multiparous) in a total lactation trial. Cows were randomly assigned at parturition to 1 of 3 dietary treatment regimes: Control (CON = 50:50 forage: concentrate …
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The effects of various nutritional factors on the composition of milk
… two groups (four each) of late and three of early lactation. A control ration similar to that fed in trial A, except 48 instead of 40 lb. of corn silage, and a low-roughage ration of only 2 lb. hay and concentrates ad libitum, were fed to two groups in each stage of lactation. The remaining …
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