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Effects Of Milk, Pasteurized Milk, And Milk Replacer On Health And Productivity Of Dairy Calves (2014), Lindsey E. Hulbert, Sophia A. Trombetta, Jere A. Noel, Sonia J. Moisa
Effects Of Milk, Pasteurized Milk, And Milk Replacer On Health And Productivity Of Dairy Calves (2014), Lindsey E. Hulbert, Sophia A. Trombetta, Jere A. Noel, Sonia J. Moisa
Kansas Agricultural Experiment Station Research Reports
Our objectives were to determine the health and blood parameters before, during, and after weaning of 114 Holstein heifers fed either accelerated milk replacer (MR; 28% CP, 18% fat) or non-saleable milk (3.59 ± 0.28% true protein; 4.12 ± 0.37% fat) that was either pasteurized (PM) or raw (RM; refrigerated and fed collection). Calves were randomly assigned to feeding treatments at birth. Colostrum (1 L) was fed less than 14 hours after birth (MR and PM = pasteurized colostrum; RM = raw colostrum). All calves were bottle-fed 1.8 ± 0.20 L, 3 times daily; all calves were provided fresh water …
Effects Of Postpartum Treatment With Non-Steroidal Anti-Inflammatory Drugs On Milk Production And Culling Risk In Dairy Cattle (2014), Abigail J. Carpenter, Caroline M. Ylioja, Claudio F. Vargas, Laman K. Mamedova, L. Mendonca, Johann F. Coetzee, L. Hollis, R. Gehring, B. Bradford
Effects Of Postpartum Treatment With Non-Steroidal Anti-Inflammatory Drugs On Milk Production And Culling Risk In Dairy Cattle (2014), Abigail J. Carpenter, Caroline M. Ylioja, Claudio F. Vargas, Laman K. Mamedova, L. Mendonca, Johann F. Coetzee, L. Hollis, R. Gehring, B. Bradford
Kansas Agricultural Experiment Station Research Reports
Inflammation during early lactation is common in dairy cattle, and a high degree of inflammation during this time has recently been associated with both lower productivity and greater risk of disease during that lactation. Early lactation treatments with two non-steroidal anti-inflammatory drugs were compared with a placebo treatment to evaluate effects on whole-lactation productivity and retention in the herd. Both meloxicam and sodium salicylate increased whole-lactation milk and milk protein yields by 6 to 9%, despite being administered for only 1 or 3 days in early lactation, respectively. In addition, meloxicam treatment tended to decrease the risk of cows leaving …
Yeast Product Supplementation Influences Feeding Behavior And Measures Of Immune Function In Transition Dairy Cows (2014), Kai Yuan, Mary Beth Muckey, Luis Mendonca, Lindsey E. Hulbert
Yeast Product Supplementation Influences Feeding Behavior And Measures Of Immune Function In Transition Dairy Cows (2014), Kai Yuan, Mary Beth Muckey, Luis Mendonca, Lindsey E. Hulbert
Kansas Agricultural Experiment Station Research Reports
Yeast supplementation has been shown to increase feed intake and production in some studies with early lactation dairy cows, but the mechanisms underlying this effect remain unknown. The objective of this study was to assess the effects of supplementing a yeast product derived from Saccharomyces cerevisiae on production, feeding behavior, and immune function in cows during the transition to lactation. When fed for 3 weeks before calving through 6 weeks after calving, supplementation altered feeding behavior as well as responsiveness to vaccination and gut immunoglobulin secretion. Results suggest that yeast products can modulate several aspects of immune function and promote …
Milking Time During Periods Of Heat Stress: Part Of The Solution Or Part Of The Problem? (2014), L. Rocha, Lindsey E. Hulbert, Filippe Scortegagna, Benjamin Voelz, L. Mendonca
Milking Time During Periods Of Heat Stress: Part Of The Solution Or Part Of The Problem? (2014), L. Rocha, Lindsey E. Hulbert, Filippe Scortegagna, Benjamin Voelz, L. Mendonca
Kansas Agricultural Experiment Station Research Reports
Milking time may be a stressful event for lactating dairy cows during summer. Increases in body temperatures because of crowding in the milk parlor holding pen may contribute to increased heat stress. The objective of this extension project was to evaluate the effectiveness of heat stress abatement in milking facilities from two Kansas commercial dairies. Vaginal temperatures at milking were lower than vaginal temperatures before milking in one of the dairies. The lower vaginal temperatures at milking, however, were not observed in the other dairy at all milkings, likely because of differences in efficacy of heat abatement strategies. Milking facilities …
Luteolysis And Pregnancy Outcomes After Change In Dose Delivery Of Prostaglandin F2Α In A 5-Day Timed Artificial Insemination Program In Dairy Cows (2014), Jeffrey S. Stevenson, Stephanie Leeann Pulley, Scott L. Hill
Luteolysis And Pregnancy Outcomes After Change In Dose Delivery Of Prostaglandin F2Α In A 5-Day Timed Artificial Insemination Program In Dairy Cows (2014), Jeffrey S. Stevenson, Stephanie Leeann Pulley, Scott L. Hill
Kansas Agricultural Experiment Station Research Reports
Three experiments were conducted to determine if a larger dose of prostaglandin F2α (PG) administered on day 6 of a 5-day Ovsynch timed artificial insemination (AI) program would induce regression of the corpus luteum to facilitate AI and pregnancy outcomes similar to a traditional 5-day program with two doses of PG. When applying a 5-day program, cows that ovulate in response to the first GnRH injection have a new corpus luteum (CL) that is 2 days younger when PG is administered in a 5- versus 7-day program. To regress successfully the younger CL, a second injection of PG must be …
Preliminary Studies On In Situ Monitoring Of Lactose Crystallization Using Focused Beam Reflectance Measurement (2014), Karthik Pandalaneni, Jayendra K. Amamcharla
Preliminary Studies On In Situ Monitoring Of Lactose Crystallization Using Focused Beam Reflectance Measurement (2014), Karthik Pandalaneni, Jayendra K. Amamcharla
Kansas Agricultural Experiment Station Research Reports
Isothermal crystallization of lactose was studied at supersaturated concentrations (w/w) of 50%, 55%, and 60% at temperatures 20ºC and 30ºC using an in situ system, focused beam reflectance measurement (FBRM), and a refractometer. The FBRM data were compared with Brix readings taken over time using a refractometer during isothermal crystallization. Chord length distribution obtained from FBRM in the ranges of <50 >μm (fine crystals) and 50 to 300 μm (coarse crystals) were observed and evaluated in relation to the extent of crystallization and rate constant results deduced from the refractometer measurements. The measured fine crystal counts increased with supersaturated concentration and …
Consumer Acceptance Of Cysteine-Enhanced Yogurt, Soumya Bala, Karen A. Schmidt
Consumer Acceptance Of Cysteine-Enhanced Yogurt, Soumya Bala, Karen A. Schmidt
Kansas Agricultural Experiment Station Research Reports
Within cells, cysteine can be synthesized from methionine by the enzyme γ-cystathionase. Cysteine is then utilized to synthesize glutathione, which has many functions in cells that contribute to good health. Certain subpopulations, however, especially the elderly, have decreased γ-cystathionase activity. Thus, dietary cysteine may be beneficial in maintaining health. In previous reports, a yogurt with enhanced cysteine content was made by incorporating whey protein isolate (WPI) into the mix's dairy base combined with a process treatment to minimize cysteine denaturation. The gel quality of this yogurt matched or exceeded that of a yogurt that was formulated and processed to mimic …
Five-Day Resynch Programs In Dairy Cows Including Controlled Internal Drug Release At Two Stages Post-Artificial Insemination (2013), Stephanie Leeann Pulley, Scott L. Hill, Jeffrey S. Stevenson
Five-Day Resynch Programs In Dairy Cows Including Controlled Internal Drug Release At Two Stages Post-Artificial Insemination (2013), Stephanie Leeann Pulley, Scott L. Hill, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to assess pregnancy outcomes after a 5-day Ovsynch-56 Resynch (RES; gonadotropin-releasing hormone injection 5 days before [GnRH-1; d 0] and 56 hours (GnRH-2) after PGF2α[PG] injections on day 5 and 6, timed artificial insemination [TAI] on day 8) with and without a progesterone-releasing intravaginal controlled internal drug release (CIDR) 5-day insert. In Exp. 1, nonpregnant cows were enrolled on day 34 post- AI: day 34 RES-CON (n = 528) or day 34 RES-CIDR (n = 503). Blood was collected for progesterone assay. Pregnancy per AI (P/AI) was diagnosed by uterine palpation per rectum at 34 and …
Automated Activity Monitoring Of Estrus And Time Of Ovulation (2013), Jeffrey S. Stevenson
Automated Activity Monitoring Of Estrus And Time Of Ovulation (2013), Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Detection of estrus can be facilitated by use of automated activity monitors that measure physical activity. Increased physical activity is largely correlated with estrus. Our objective was to determine when ovulation occurs relative to increased physical activity so we could recommend optimal timing of insemination to maximize conception rates in lactating dairy cows. Cows (n = 65) were fitted with pressure-sensitive rump-mounted transmitters (HeatWatch; HW) that are activated by a mounting herdmate to indicate standing estrus. The same cows also were fitted with neck-mounted activity monitors (Select Detect; SD). Additional cows (n = 68) were fitted with only the activity …
Concentrations Of Luteinizing Hormone And Ovulatory Responses In Dairy Cows Before Timed Artificial Insemination (2013), Stephanie Leeann Pulley, D. H. Keisler, Scott L. Hill, Jeffrey S. Stevenson
Concentrations Of Luteinizing Hormone And Ovulatory Responses In Dairy Cows Before Timed Artificial Insemination (2013), Stephanie Leeann Pulley, D. H. Keisler, Scott L. Hill, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to determine the incidence of spontaneous and gonadotropinreleasing hormone (GnRH)-induced surges of luteinizing hormone (LH) and ovulatory responses in lactating dairy cows enrolled in a timed artificial insemination (TAI) protocol. Cows (n = 70) in a single herd were assigned to one of two presynchronization protocols: Pre- 10 or PG-3-G. Cows assigned to the Pre-10 treatment received 2 injections of prostaglandin F2α(PGF2α) 14 days apart (Presynch), with the second injection administered 10 days before the onset of a TAI protocol. Cows assigned to the PG-3-G treatment received an injection of prostaglandin F2α(PGF2α), then 3 …
Effects Of Chromium Propionate And Supplemental Amino Acids On Dairy Cattle Performance Near Peak Lactation (2013), Francisco J. Vargas, Kai Yuan, Evan C. Titgemeyer, Laman Mamedova
Effects Of Chromium Propionate And Supplemental Amino Acids On Dairy Cattle Performance Near Peak Lactation (2013), Francisco J. Vargas, Kai Yuan, Evan C. Titgemeyer, Laman Mamedova
Kansas Agricultural Experiment Station Research Reports
Feeding chromium in early lactation can increase milk production, but responses during peak lactation have not been studied. The objective of this study was to evaluate responses to chromium propionate during this period as well as interactions with rumen-protected lysine and methionine. Chromium propionate increased feed intake and tended to increase energy-corrected milk yield, and primiparous cows showed greater responses in feed intake and milk protein yield than multiparous cows. In this study, feeding chromium propionate near peak lactation increased feed intake and tended to increase productivity, but no benefits of supplementing rumen-protected lysine and methionine were observed.; Dairy Day, …
Sodium Salicylate During The First 7 Days Of Lactation Affects The Entire Lactation (2012), Jaymelynn K. Farney, Laman Mamedova, J. Ernest Minton, J. F. Coetzee
Sodium Salicylate During The First 7 Days Of Lactation Affects The Entire Lactation (2012), Jaymelynn K. Farney, Laman Mamedova, J. Ernest Minton, J. F. Coetzee
Kansas Agricultural Experiment Station Research Reports
Inflammation has been proposed as a contributor to metabolic disorders in transition dairy cows. The purpose of this experiment was to determine if a non-steroidal anti-inflammatory drug, sodium salicylate (SS), benefits transition cows. At calving, 78 cows [primiparous (1P) n = 39; 2nd lactation (2P) n = 24; ≥3 lactations (3P) n = 15] were assigned alternately to either a control or SS treatment for 7 days and production responses were evaluated through the entire lactation. Treatment was administered via individual water bowls, delivering a mean of 123 ± 5.5 (mean ± standard deviation) grams salicylate per day during the …
Evaluation Of Yogurt With Enhanced Cysteine Content (2012), Soumya Bala, Karen A. Schmidt
Evaluation Of Yogurt With Enhanced Cysteine Content (2012), Soumya Bala, Karen A. Schmidt
Kansas Agricultural Experiment Station Research Reports
Amino acids are the building blocks of protein and assist with metabolism in the body. In the human body, the amino acid cysteine can be synthesized from methionine by the enzyme Î¥-cystathionase. Because certain human subpopulations such as those prone to cataracts have decreased Î¥-cystathionase activity, dietary cysteine may be beneficial. Nutritionally, yogurt mix is one of the best dairy food sources of methionine and cysteine, but the heat treatment used in manufacturing yogurt decreases the dietary availability of cysteine. Last year, it was shown that supplementing yogurt mixes with whey protein isolate (WPI) (>90% protein) and processing yogurt …
Reinsemination Intervals After Timed Artificial Insemination Or Estrus-Detected Inseminations (2012), Jeffrey S. Stevenson
Reinsemination Intervals After Timed Artificial Insemination Or Estrus-Detected Inseminations (2012), Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective was to quantify the reinsemination intervals of lactating dairy cows that were either inseminated at estrus or received a timed AI (TAI) at first service. Cows in Experiment 1 were enrolled in a TAI program before first AI after calving. Cows detected in estrus after 50 days in milk (DIM) were inseminated, whereas the remainder continued in the TAI program and were inseminated as scheduled. Cows in Experiment 2 also were enrolled in a TAI program and were inseminated accordingly at first service after calving. On day 7 after TAI, cows were assigned randomly to receive either saline …
Meta-Analysis Of The Effects Of Dietary Sugar On Intake And Productivity Of Dairy Cattle (2012), C. F. Vargas, Christopher D. Reinhardt, J. L. Firkins, Barry J. Bradford
Meta-Analysis Of The Effects Of Dietary Sugar On Intake And Productivity Of Dairy Cattle (2012), C. F. Vargas, Christopher D. Reinhardt, J. L. Firkins, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
A meta-analysis was performed to determine the possible effects of dietary sugar on feed intake and milk production in lactating dairy cattle. The database used in this analysis included 18 treatment comparisons frozm 10 studies reported from 1985 through 2011. Treatment comparisons were used only if: (1) either sucrose (9 comparisons) or molasses (9 comparisons) replaced corn grain without adding fat; and (2) sugar added by treatment ranged from 2 to 5% of dry matter. First, responses to sucrose and molasses were compared to assess whether these sugar sources could be considered together. Statistical analysis provided no evidence for different …
Hot Topic: New Research Highlights The Need For Holistic Thinking About Transition Cows (2012), Barry J. Bradford
Hot Topic: New Research Highlights The Need For Holistic Thinking About Transition Cows (2012), Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
In the past, efforts to improve the transition to lactation have focused largely on preventing infections and maximizing energy intake in transition cows, and these issues have generally been treated independently. New models, however, are emerging to explain the development of numerous transition disorders. A combination of insults, including social stress, negative energy balance, heat stress, endotoxin exposure, and oxidative stress may promote inflammation, suppress feed intake, and impair both metabolic and immune function during the transition period. These models suggest that transition cow management must be viewed holistically, because the cow's environment, nutrition, and immune function interact in many …
Evaluation Of Methionine Availability To Dairy Cowswhen Added To Mechanically Extracted Soybean Mealwith Soy Gums (2011), D.W. Brake, Evan C. Titgemeyer, Barry J. Bradford, C.A. Macgregor
Evaluation Of Methionine Availability To Dairy Cowswhen Added To Mechanically Extracted Soybean Mealwith Soy Gums (2011), D.W. Brake, Evan C. Titgemeyer, Barry J. Bradford, C.A. Macgregor
Kansas Agricultural Experiment Station Research Reports
Twenty-five Holstein cows were fed 5 different diets to evaluate amounts of metabolizable methionine provided to dairy cows from a mechanically extracted soybean meal (meSBM) with methionine added during manufacture. The control diet was designed to be deficient in metabolizable methionine supply. Two amounts of methionine were added from either a commercially available ruminally protected product (RPMet) or from a meSBM with methionine added during manufacture (meSBM-Met). Average milk yield was 98.8 lb/day, average milk fat was 2.81%, and milk urea nitrogen (MUN) averaged 8.6 mg/dL. Milk protein yield was not responsive to metabolizable methionine supply, suggesting that milk protein …
Enhancing Cysteine Content In Yogurt (2011), Soumya Bala, Karen A. Schmidt
Enhancing Cysteine Content In Yogurt (2011), Soumya Bala, Karen A. Schmidt
Kansas Agricultural Experiment Station Research Reports
Cysteine is considered a conditional amino acid for certain subpopulations. For example, in elderly people, cysteine has been associated with diverse functional properties as a general antioxidant as well as a specific role linked to cataract reduction or prevention. Yogurt is an excellent source of protein, the sulfur-containing amino acids methionine and cysteine in particular. Heat, however, can denature these amino acids and affect their bioavailability. A yogurt mix supplemented with whey proteins (an abundant source of cystiene) coupled with minimal pasteurization of yogurt mixes may increase the availability of cysteine in the final product. In this study, yogurt mixes …
Influence Of Dairy Housing On Freshwater Usage On Commercial Dairies In Western Kansas (2011), J.P. Potts, Michael J. Brouk
Influence Of Dairy Housing On Freshwater Usage On Commercial Dairies In Western Kansas (2011), J.P. Potts, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Fresh water pumping records were obtained from 24 western Kansas dairy farms for a 10-year period from 2000 through 2009. Farms were divided by facility type: dry lot (DL), free stall (FS), or a combination (DL+FS). Of the facility types studied, DL averaged smaller (P < 0.05) demand for water at 52.6 gal/cow per day compared with FS at 61.3 gal/cow. Both DL and FS facilities had less water demand than the combination facilities of DL+FS at 71.1 gal/cow of water daily. In all cases, average freshwater pumping was less than the daily amount of 134.7 gal/cow commonly used in dairy facility design. The difference may result from water conservation efforts of the dairies and the efficiency gained from operating larger milking parlors.; Dairy Day, 2011, Kansas State University, Manhattan, KS, 2011; Dairy Research, 2011 is known as Dairy Day, 2011
Effects Of Monensin On Metabolic Profile And Feeding Behavior Of Transition Dairy Cows (2011), C.R. Mullins, C.E. Moore, H.B. Green, K.L. Perfield
Effects Of Monensin On Metabolic Profile And Feeding Behavior Of Transition Dairy Cows (2011), C.R. Mullins, C.E. Moore, H.B. Green, K.L. Perfield
Kansas Agricultural Experiment Station Research Reports
Thirty-two Holstein transition cows were used to determine the effects of monensin (Rumensin, Elanco Animal Health, Greenfield, IN; 400 mg/cow daily) on metabolism and feeding behavior. Cows were assigned randomly, based on calving date, to control or monensin treatments (n = 16 per treatment) 21 days before their expected calving date, and cows remained on treatments through 21 days in milk. Feeding behavior and water intake data were collected daily. Blood samples were collected at 8 different time points during the experimental period. Monensin decreased mean and peak plasma ketone concentrations, and also decreased time between meals before and after …
Effects Of Sodium Salicylate On Productivityof Postpartum Dairy Cows (2011), J.K. Farney, J. Ernest Minton, J.F. Coetzee, Larry C. Hollis
Effects Of Sodium Salicylate On Productivityof Postpartum Dairy Cows (2011), J.K. Farney, J. Ernest Minton, J.F. Coetzee, Larry C. Hollis
Kansas Agricultural Experiment Station Research Reports
Inflammation has been proposed as a contributor to metabolic disorders in transition dairy cows. The purpose of this experiment was to determine whether a non-steroidal anti-inflammatory drug, sodium salicylate (SS), benefits transition cows. At calving, 78 cows (primiparous, n = 39; second lactation, n = 28; ≥3 lactations, n = 11) were assigned alternately to either a control (CON) or SS treatment for 7 days and remained on study until 21 days postpartum. Treatment was administered via individual water bowls at a concentration of 2.5 g/L, delivering a mean of 183 ± 8.5 g/day SS during the 7 days of …
Prostaglandin F2Α And Gnrh Administration Improvedprogesterone Status, Luteal Number, And Proportionof Ovular And Anovular Dairy Cows With Corpora Luteabefore A Timed Artificial Insemination Program (2011), Stephanie Leeann Pulley, H.I. Jr. Mellieon, Jeffrey S. Stevenson
Prostaglandin F2Α And Gnrh Administration Improvedprogesterone Status, Luteal Number, And Proportionof Ovular And Anovular Dairy Cows With Corpora Luteabefore A Timed Artificial Insemination Program (2011), Stephanie Leeann Pulley, H.I. Jr. Mellieon, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this research was to increase the proportion of cows with at least 1 functional corpus luteum (CL) and elevated progesterone at the onset of the timed artificial insemination (TAI) program. Postpartum Holstein cows in 1 herd were stratified by lactation number at calving (September 2009 through August 2010) and assigned randomly to 1 of 2 treatments: (1) Presynch-10 (n = 105): two 25-mg injections of prostaglandin F2α(PG) 14 days apart (Presynch); and (2) PG-3-G (n = 105): one 25-mg injection of PG 3 days before 100 μg gonadotropin- releasing hormone (GnRH; Pre-GnRH), with the PG injection administered …
Effects Of Supplementing Methionine And Lysine In A Lactation Diet Containing High Concentrations Of Corn By-Products (2011), C.R. Mullins, D. Weber, E. Block, John F. Smith
Effects Of Supplementing Methionine And Lysine In A Lactation Diet Containing High Concentrations Of Corn By-Products (2011), C.R. Mullins, D. Weber, E. Block, John F. Smith
Kansas Agricultural Experiment Station Research Reports
Ninety-six lactating Holstein cows were used to determine the effects of using commercial supplements to supply additional lysine and methionine in diets containing large proportions of corn by-products. Cows were assigned to 1 of 8 pens. Pens were offered rations formulated to differ in metabolizable lysine and methionine supply. The study was divided into 2 periods. During period 1, cows received similar diets, but the treatment diet supplied supplemental lysine and methionine. During period 2, the treatment diet was modified to reduce dietary crude protein. Feed intake and production were monitored daily, and milk components were analyzed 3 days per …
Effects Of Dietary Amylase And Sucrose On Productivity Of Cows Fed Low-Starch Diets (2011), C.F. Vargas, Barry J. Bradford
Effects Of Dietary Amylase And Sucrose On Productivity Of Cows Fed Low-Starch Diets (2011), C.F. Vargas, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
Exogenous amylase, sucrose, or a combination was used in diets with reduced starch content. The trial was performed in 48 lactating Holstein cows, and milk yield, milk composition, and dry matter intake were measured. Treatments did not affect production traits, but with slightly decreased feed intake and slightly greater milk production in amylase-fed cows, the calculated value of amylase in this study was $0.37/cow per day.; Dairy Day, 2011, Kansas State University, Manhattan, KS, 2011; Dairy Research, 2011 is known as Dairy Day, 2011
Evaluation Of The 5- Vs. 7-Day Cidr Program In Dairyheifers Before Timed Artificial Insemination (2011), H.I. Jr. Mellieon, Stephanie Leeann Pulley, G.C. Lamb, J.E. Larson
Evaluation Of The 5- Vs. 7-Day Cidr Program In Dairyheifers Before Timed Artificial Insemination (2011), H.I. Jr. Mellieon, Stephanie Leeann Pulley, G.C. Lamb, J.E. Larson
Kansas Agricultural Experiment Station Research Reports
Our objectives were to determine: (1) the effectiveness of an injection of PGF2αto regress the corpus luteum before initiating an timed artificial insemination (TAI) program, (2) ovulation response to gonadotropin-releasing hormone (GnRH), and (3) pregnancy outcomes in dairy heifers inseminated with conventional and gender-biased semen. Heifers (n = 545) from 3 locations (Florida, Kansas, and Mississippi) were assigned randomly to 1 of 2 treatments: (1) 25-mg prostaglandin F2α(PGF2α) injection and controlled internal drug release (CIDR) insert on day −7 followed by 100 μg of GnRH administered on day −5, and a 25-mg PGF2α injection at CIDR insert removal (7D) on …
Effects Of Wet Corn Gluten Feed And Dietary Particlesize On Ruminal Fermentation And Milk Production (2010), M.L. Sullivan, Barry J. Bradford
Effects Of Wet Corn Gluten Feed And Dietary Particlesize On Ruminal Fermentation And Milk Production (2010), M.L. Sullivan, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
Wet corn gluten feed (WCGF) was included in 4 diets at 0, 11, 23, and 34% of diet dry matter. Alfalfa hay was used to maintain at least 10% of particles ≥0.71 inches in length (the top screen of the Penn State Particle Separator) in all diets. Ruminal probes were placed in the rumens of 7 ruminally cannulated lactating Holstein dairy cows to measure ruminal pH. As WCGF increased in the diet, dry matter intake and milk production increased quadratically with 23% WCGF supporting the highest feed intake and milk yield. Ruminal pH and milk fat content were similar across …
Effects Of Varying Rates Of Tallgrass Prairie Hay And Wet Corn Gluten Feed On Productivity Of Dairy Cows (2010), D.J. Rezac, K.N. Grigsby, Barry J. Bradford
Effects Of Varying Rates Of Tallgrass Prairie Hay And Wet Corn Gluten Feed On Productivity Of Dairy Cows (2010), D.J. Rezac, K.N. Grigsby, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
Productivity of lactating dairy cows was assessed when fed diets containing wet corn gluten feed (WCGF; Sweet Bran, Cargill Inc.) as the primary energy substrate and prairie hay as the primary source of physically effective neutral detergent fiber (peNDF) compared with a control diet. Treatment diets were: 1) a control diet with 18% alfalfa, 18% corn silage, 33% WCGF, and 15% forage NDF (CON); 2) a diet with 20% tallgrass prairie hay, 46% WCGF, and 13% forage NDF (TPH20); and 3) a diet with 14% tallgrass prairie hay, 56% WCGF, and 9% forage NDF (TPH14). Midway through period 2, the …
Lysine Degradation By Ruminal Fusobacteriumnecrophorum (2010), E.A. Elwakeel, R.G. Amachawadi, A.M. Nour, M.E. Nassar
Lysine Degradation By Ruminal Fusobacteriumnecrophorum (2010), E.A. Elwakeel, R.G. Amachawadi, A.M. Nour, M.E. Nassar
Kansas Agricultural Experiment Station Research Reports
Three experiments were conducted to characterize lysine fermentation by Fusobacterium necrophorum, a ruminal bacterium that is known to degrade amino acids. In Experiment 1, 7 strains of Fusobacterium necrophorum were inoculated into media containing lysine (50 mM), lactate (50 mM), or lysine plus lactate (50 mM each) as the major energy substrate to evaluate growth and ammonia production. All strains grew with lysine, lactate, or lactate plus lysine as the primary substrate. When grown with lysine, all strains produced ammonia as an end product, even if lactate was also present. Smaller concentrations of ammonia for medium containing lactate plus lysine …
Bioavailability Of Lysine From Hydroxymethyl Lysine (2010), E.A. Elwakeel, Evan C. Titgemeyer, D.W. Brake, A.M. Nour
Bioavailability Of Lysine From Hydroxymethyl Lysine (2010), E.A. Elwakeel, Evan C. Titgemeyer, D.W. Brake, A.M. Nour
Kansas Agricultural Experiment Station Research Reports
Twelve mature sheep were used as a ruminant model to estimate the bioavailability of lysine in hydroxymethyl lysine (HML) compared with a commercial product of rumen-protected lysine (RPL; LysiPEARL, Kemin Industries, Inc.) with known availability. The sheep were fed a diet with a forage to concentrate ratio similar to that of dairy diets. Following a control period in which plasma lysine was measured when sheep received no supplemental lysine, the sheep were provided 2 of 4 treatments during periods 2 and 3; treatments included RPL to provide 3 or 6 g/day of available lysine (actual amounts of product provided were …
Ovarian Characteristics, Serum Hormoneconcentrations, And Fertility In Lactating Dairy Cows Inresponse To Equine Chorionic Gonadotropin (2010), Stephanie Leeann Pulley, L.D. Wallace, H.I. Mellieon, Jeffrey S. Stevenson
Ovarian Characteristics, Serum Hormoneconcentrations, And Fertility In Lactating Dairy Cows Inresponse To Equine Chorionic Gonadotropin (2010), Stephanie Leeann Pulley, L.D. Wallace, H.I. Mellieon, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to evaluate the effects of equine chorionic gonadotropin (eCG) on various characteristics associated with an effective timed artificial insemination (AI) protocol in lactating dairy cows. Cows (n = 121) in a single herd were treated with 2 injections of prostaglandin F2α(PGF2α) 14 days apart (Presynch), with the second injection administered 11 days before the onset of a timed AI protocol. Cows received either saline or 400 IU eCG concurrent with the PGF2αinjection of the Ovsynch protocol (injection of gonadotropinreleasing hormone or GnRH, 7 days before and 48 to 56 hours after PGF2αwith insemination occurring …