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Articles 721 - 750 of 1392
Full-Text Articles in Animal Sciences
Relative Efficiency Of Natural Feeding Programs Using Germ Or Bran Cake From A Dry Milling Process, Robbi H. Pritchard, Donald L. Boggs
Relative Efficiency Of Natural Feeding Programs Using Germ Or Bran Cake From A Dry Milling Process, Robbi H. Pritchard, Donald L. Boggs
South Dakota Beef Report, 2005
This experiment was designed to evaluate the potential of using high-fat ethanol co-products in cattle feeding programs that exclude implants and ionophores. Four treatments included: 1) Positive Control, implanted steers fed a typical diet that included 29g/T monensin; 2) Control Diet fed to non-implanted steers; 3) 14% Germ, no implant or ionophore; and 4) 30% Bran Cake, no implant, no ionophore. After a 110 d finishing period, the breakeven (B/E) fed cattle price increased $3.04/cwt when an implant was not used on the Control diet. The Germ diet resulted in comparable performance as the Control diet fed to non-implanted steers. …
Composition And Nutritive Value Of Corn Fractions And Ethanol Co-Products Resulting From A New Dry-Milling Process, Greg B. Kleinhans, Robbi H. Pritchard, Simone M. Holt
Composition And Nutritive Value Of Corn Fractions And Ethanol Co-Products Resulting From A New Dry-Milling Process, Greg B. Kleinhans, Robbi H. Pritchard, Simone M. Holt
South Dakota Beef Report, 2005
The development of a new dry-milling process for the production of corn ethanol has resulted in new feedstuffs. This process fractionates the corn kernel prior to fermentation. Pre-fermentation fractions include bran, germ, and endosperm. Post-fermentation fractions include dried distillers grains (DDG) and condensed distiller solubles (syrup). Proximate analysis was conducted on these fractions along with the parent corn sample. Equations were used to predict TDN and undegradable intake protein (UIP). These feeds differ substantially from historical dried distiller’s grains with solubles (DDGS). Feeding experiments will be necessary to confirm the results of the predicted feed values.
Corn Germ As A Source Of Supplemental Fat For Cows In Late Gestation, Dick Pruitt, Jeff A. Clapper, William B. Epperson, George A. Perry
Corn Germ As A Source Of Supplemental Fat For Cows In Late Gestation, Dick Pruitt, Jeff A. Clapper, William B. Epperson, George A. Perry
South Dakota Beef Report, 2005
To evaluate corn germ as a source of supplemental fat, 217 two to twelve-year-old cows receiving grass hay free choice were supplemented with either 2.75 lb of corn germ (dry basis) or an equal amount of crude protein from soybean meal (0.80 lb dry matter) starting approximately 50 days prior to the first expected calving. Cows were removed from treatment the day they calved and where managed as a group through the breeding season. Supplement treatment did not affect cow weight change or body condition score. Corn germ did not improve any measure of reproduction, including the percentage of cows …
Effect Of Harvest Method On The Nutrient Composition Of Baled Cornstalks, Cody L. Wright
Effect Of Harvest Method On The Nutrient Composition Of Baled Cornstalks, Cody L. Wright
South Dakota Beef Report, 2005
This experiment was conducted to determine the effect of chopping corn residue prior to baling on the nutrient composition of cornstalk bales. One dryland corn field planted with a single variety of corn was used. After harvest, one half of the field was chopped with a stalk chopper. The remaining half was not chopped. Each half of the field was then raked into windrows, baled, and wrapped with plastic netting. Ten round bales were harvested from each half of the field (chopped and not chopped). Three core samples were then collected from each bale and pooled for analysis. Pooled samples …
Factors Affecting Profitability Of The Cow-Calf Enterprise In The Northern Great Plains, Barry H. Dunn, Dick Pruitt, Edward Hamilton, Duane Griffith
Factors Affecting Profitability Of The Cow-Calf Enterprise In The Northern Great Plains, Barry H. Dunn, Dick Pruitt, Edward Hamilton, Duane Griffith
South Dakota Beef Report, 2005
One hundred and forty eight privately owned and operated cow-calf enterprises were surveyed for their production and financial performance measures and the results analyzed for factors that affected profitability. The results of these analyzes indicate that for cow-calf enterprises in the Northern Great Plains, high levels of profit are a function of lower than average investment, above average reproductive performance, lower than average total expenses, and above average market prices for calves produced. Neither high nor low levels of other biological production, geographical region, size of operation, or year were factors that explained differences in profitability. Profitability measured as Return …
Use Of Corn Co-Products In Soybean Hull-Based Feedlot Receiving Diets, Chad J. Mueller, Donald L. Boggs
Use Of Corn Co-Products In Soybean Hull-Based Feedlot Receiving Diets, Chad J. Mueller, Donald L. Boggs
South Dakota Beef Report, 2005
The use of different supplemental protein sources with soybean hulls in receiving cattle diets were evaluated using 200 Angus steer calves. Diets contained either corn and soybean meal (C-SBM), or soybean hulls with soybean meal (H-SBM), dried corn gluten feed (H-DCGF) or dried distillers grains plus solubles (H-DDGS). The replacement of corn (C-SBM) with soybean hulls (H-SBM) stimulated intake within the first 14 d of the receiving period and throughout the entire growing period (52 d). Supplementing soybean hulls with corn origin protein (COP) versus soybean meal did not result in any performance differences throughout the feeding period. Within the …
Influence Of Calcium Metabolism On Meat Tenderness In Heiferettes, Kelly W. Bruns, Robbi H. Pritchard
Influence Of Calcium Metabolism On Meat Tenderness In Heiferettes, Kelly W. Bruns, Robbi H. Pritchard
South Dakota Beef Report, 2005
Forty beef-type heiferettes (initial BW=1016 ± 93 lb) were used to evaluate the influence of dietary calcium depletion followed by dietary repletion prior to slaughter on carcass and meat quality traits. Treatments were 1.) control - feed calcium diet for duration of trial (13 hd); 2.) calcium depleted 14 days followed by one feeding of replete diet 20 h prior to slaughter (13 hd); 3.) calcium depleted 14 days followed by two feedings of repleted diet 20 h and 44 h before harvest (14 hd). Heifers were sorted on condition and weight from a larger population of 280 head. Heiferettes …
Comparative Anatomy Of A Presorted Pot-Load Of Yearling Steers, Kelly W. Bruns, Robbi H. Pritchard, Simone Holt
Comparative Anatomy Of A Presorted Pot-Load Of Yearling Steers, Kelly W. Bruns, Robbi H. Pritchard, Simone Holt
South Dakota Beef Report, 2005
One load (n = 72; initial BW = 745 ± 54.5) of grass-raised Angus-cross yearling steers was purchased from a sale barn in north central South Dakota. The steers were sorted into load lots by sale barn personnel from a larger group of 1200. Upon arrival, steers were used in the 4-day Feedlot Shortcourse before being weighed and appraised for visual differences. Cattle were divided (randomly) into 8 groups of 9 head each. One steer was randomly selected from each of the eight groups to make a 9th group of steers comprised of each classification. The steers were fed until …
Fenceline Weaning On Pasture And Forage Barley To Extend The Grazing Season For Replacement Heifers - A Three-Year Summary, Dick Pruitt, William Epperson, Vance Owens, Alexander Smart
Fenceline Weaning On Pasture And Forage Barley To Extend The Grazing Season For Replacement Heifers - A Three-Year Summary, Dick Pruitt, William Epperson, Vance Owens, Alexander Smart
South Dakota Beef Report, 2005
In a three-year study at the SDSU Cow/Calf Teaching and Research Unit, Brookings, SD, heifer calves were allotted to two weaning management treatments in early October. The pasture-weaned group was separated from their dams and grazed a grass pasture across the fence from their dams for two weeks. Then, until early December, they grazed “Robust” barley (forage type) that had been no-till planted into oat stubble in early August. The drylot-weaned group was fed a traditional weaning diet of grass hay, corn and protein supplement from weaning until early December. Heifers received the same diet and were managed as one …
Sdsu Cow/Calf Teaching And Research Unit, Dick Pruitt, Kevin Vanderwal, Anna Drew
Sdsu Cow/Calf Teaching And Research Unit, Dick Pruitt, Kevin Vanderwal, Anna Drew
South Dakota Beef Report, 2005
The SDSU Cow/Calf Unit (CCU) provides cattle and facilities for numerous Animal Science and Range Science classes and a variety of research projects. The CCU also provides cattle for the SDSU Little International, Block & Bridle Club activities, numerous judging team workouts, and other activities that bring potential students to the SDSU campus. Kevin VanderWal and Anna Drew along with part-time student employees, manage the herd, collect research data, and assist with numerous beef cattle activities throughout the year.
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.
Response Of Cow-Calf Pairs To Water High In Sulfates, Hubert Patterson, Pat Johnson, George Perry, Roger Gates, Ron Haigh
Response Of Cow-Calf Pairs To Water High In Sulfates, Hubert Patterson, Pat Johnson, George Perry, Roger Gates, Ron Haigh
South Dakota Beef Report, 2005
Data from our laboratory showed water sulfate levels of 3,000 ppm reduced performance and health of growing steers during summer months. In addition, water averaging 2,600 ppm in sulfates for cow-calf pairs had little impact on calf growth or milk production, but caused small reductions in cow BW and body condition score (BCS). This experiment was conducted to evaluate the effects of high sulfate water on cow and calf performance, milk production, and reproduction. Ninety-six crossbred, lactating cows (ages 2-13; average calving date of April 14) and their calves were assigned, after stratifying by age, weight, and previous winter management, …
Evaluation Of Dried Distillers Grains With Solubles As A Feedstuff For Heifers In The Last Trimester Fo Gestation, Chanda L. Engel, Hubert H. Patterson, George A. Perry, Ron Haigh, Jason Johnson
Evaluation Of Dried Distillers Grains With Solubles As A Feedstuff For Heifers In The Last Trimester Fo Gestation, Chanda L. Engel, Hubert H. Patterson, George A. Perry, Ron Haigh, Jason Johnson
South Dakota Beef Report, 2005
Ninety-six crossbred heifers were used in an experiment to evaluate the effect of dried distillers grains plus solubles (DDGS), fed in the last trimester of gestation, on heifer performance and reproduction. Animals were blocked by previous heifer development strategy (Antelope Research Station range developed = ANT 1; Antelope Research Station dry lot developed = ANT 2; Cottonwood research station = CTW), stratified by expected calving date, body weight and body condition score, and randomly allotted to one of twelve pens. Each pen was randomly assigned to one of two treatments (6 pens/treatment; 4 pens per block). Treatments were 1) dried …
Forecasting Forage Yield On Clayey Ecological Sites In Western South Dakota Using Weather Data, Alexander J. Smart, Barry H. Dunn, Lan Xu, Patricia S. Johnson, Roger N. Gates
Forecasting Forage Yield On Clayey Ecological Sites In Western South Dakota Using Weather Data, Alexander J. Smart, Barry H. Dunn, Lan Xu, Patricia S. Johnson, Roger N. Gates
South Dakota Beef Report, 2005
The ability to forecast annual forage yield from weather data would be useful for making appropriate adjustments to stocking rates in order to achieve or maintain desired plant communities. Our objective was to determine the relationship between weather variables and annual forage yield from three distinct plant communities on clayey ecological sites in western South Dakota. Forage yield and weather data were collected from 1945 through 1960 at the Cottonwood Range and Livestock Research Station, in western South Dakota. Pastures stocked at 0.25, 0.40, and 0.60 AUM/acre from 1942 to 1960 developed into western wheatgrass-dominated, western wheatgrass-shortgrass co-dominated, and shortgrass …
Effects Of Feeding Varying Concentrations Of Dry Distiller's Grains With Solubles To Finishing Steers On Feedlot Performance, Nutrient Management And Odorant Emissions, Clint S. Benson, Cody L. Wright, Kent E. Tjardes, Richard E. Nicolai, Bradley D. Rops
Effects Of Feeding Varying Concentrations Of Dry Distiller's Grains With Solubles To Finishing Steers On Feedlot Performance, Nutrient Management And Odorant Emissions, Clint S. Benson, Cody L. Wright, Kent E. Tjardes, Richard E. Nicolai, Bradley D. Rops
South Dakota Beef Report, 2005
A study was conducted to determine the effects of feeding varying concentrations of dried distillers grains with solubles (DDGS) to finishing steers on feedlot performance, nutrient management, and odorant emissions. Prior to initiation of the trial, 192 steers (initial BW = 826 ± 18 lb) were blocked by receiving date, weighed, and randomly allotted to 16 dirt floor pens (48.2 ft x 113.8 ft; 5% slope). Pens were then randomly assigned to one of four dietary treatments. The control diet (CON) contained 82% cracked corn, 10% alfalfa hay, 4% molasses, 3.2% supplement, and 0.8% urea. In the remaining three treatment …
2005 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University
2005 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University
South Dakota Beef Report, 2005
This is the 2005 South Dakota Beef Report. The articles published in this report summarize many of the beef cattle research activities conducted at South Dakota State University during 2005. The articles in this report have many levels of application. Some information has immediate application for your farm, ranch, or agribusiness. The articles include information on nutrition, feed management, reproductive management, health, growth and development, and economics of the cattle and beef industry in South Dakota.
Effects Of Weaning Date And Retained Ownership On Cow And Calf Performance And Forage Disappearance In Spring Calving Beef Systems, Doug G. Landblom, Hubert H. Patterson, Pat Johnson, Roger Gates, Steve Paisley, Doug Young
Effects Of Weaning Date And Retained Ownership On Cow And Calf Performance And Forage Disappearance In Spring Calving Beef Systems, Doug G. Landblom, Hubert H. Patterson, Pat Johnson, Roger Gates, Steve Paisley, Doug Young
South Dakota Beef Report, 2005
Researchers in North Dakota, South Dakota and Wyoming are working together to evaluate the effect of weaning calves 75 days earlier than normal and are following the calves through finishing. This report summarizes accomplishments so far. Briefly, weaning calves 75 days early (mid-August) has improved cow weight and condition score compared to cows whose calves were weaned normally (early-November). Native range forage disappearance has tended to be lower when calves were weaned early. After weaning, backgrounded early weaned steers grew faster and were more efficient. However, early weaned steers required 61 more days on feed to reach final harvest.
Evaluation Of Performance And Costs Of Two Heifer Development Systems, Robin R. Salverson, Hubert H. Patterson, George A. Perry, Doug Young, Matt L. Gibson
Evaluation Of Performance And Costs Of Two Heifer Development Systems, Robin R. Salverson, Hubert H. Patterson, George A. Perry, Doug Young, Matt L. Gibson
South Dakota Beef Report, 2005
Early weaned (EW) heifers must be developed for a longer period of time usually resulting in increased development costs. Developing EW heifers on native range may reduce these costs. Dried distillers grains plus solubles (DDGS) offers protein and energy that compliment native forages for developing heifers. The objective of this study was to evaluate the performance and costs of two heifer development systems in northwest South Dakota. Sixty-five nulliparous crossbred beef heifers were randomly allotted to one of two systems: 1) heifers (n=33) weaned at 132 d of age (461 lb) and developed on range with a DDGS supplement (1.8 …
Dairy Digest 2005, South Dakota State University Dairy Club
Dairy Digest 2005, South Dakota State University Dairy Club
Dairy Digest
No abstract provided.
Grassland And Woodland Bird Occurrence And Habitat Selection In The Prairie-Forest Transition Zone Of Minnesota, Thomas Robert Cooper
Grassland And Woodland Bird Occurrence And Habitat Selection In The Prairie-Forest Transition Zone Of Minnesota, Thomas Robert Cooper
Electronic Theses and Dissertations
Numerous species of woodland and grassland nesting birds have experienced population declines in the midwestern United States. Habitat loss and habitat fragmentation are suspected to be two of the underlying causes for the population declines of woodland and grassland birds. The Minnesota Valley Wetland Management District (WMD) covers 14 counties in southeastern Minnesota in the transition zone between forested and prairie ecoregions. Little information is available relative to which birds are using grassland or woodland habitat within the WMD and how their presence or absence is related to the available habitat conditions. Therefore, my study objectives were to: 1) determine …
Furniture Usage And Activity Budgets Of Captive Black And White Ruffed Lemurs (Varecia Variegata Variegata) And Ring- Tailed Lemurs (Lemur Catta) At Bramble Park Zoo, Watertown, South Dakota, Zarah Hedge
The Journal of Undergraduate Research
A behavioral study was conducted on the black and white ruffed lemurs and ring-tailed lemurs at Bramble Park Zoo in summer 2004 to determine if the furniture in the exhibit was sufficient to enable them to display their natural behaviors. The study was performed using a time sampling method of one minute, and ten hours of data was gathered. Both species of lemur spent a significant portion of the observed time resting, more so than has been found in wild populations of lemurs. The time spent foraging (.33% and 2.5% for the ruffed lemurs and 2.1% for the ring-tails) and …
Ruminal And Plasma Responses In Dairy Cows To Drenching Or Feeding Glycerol, Peter Linke
Ruminal And Plasma Responses In Dairy Cows To Drenching Or Feeding Glycerol, Peter Linke
The Journal of Undergraduate Research
Four Holstein dairy cows (137 DIM, 60 kg milk/d) were used in a Latin square with 1-wk periods to evaluate the effect of methods of oral delivery of glycerol on ruminal VFA and plasma concentrations of glucose, 6-hydroxybutyrate (BHBA), nonesterified fatty acids (NEFA), and insulin. All cows were fed only grass hay for ad libitum consumption during 12 h before the experiment. At the start of the experiment, time 0, all cows were fed 5 kg of cracked corn. Treatments administered at time 0 were: 1) control (C), no glycerol; 2) fed glycerol (F), 1 kg of glycerol solution (80% …
Effectiveness Of Dried Distillers Grains With Solubles As A Replacement For Oilseed Meal In Supplements For Cattle Consuming Poor Quality Forage, Heidi Doering-Resch, Cody Wright, Kent Tjardes, George Perry, Kelly Bruns, Bradley Rops
Effectiveness Of Dried Distillers Grains With Solubles As A Replacement For Oilseed Meal In Supplements For Cattle Consuming Poor Quality Forage, Heidi Doering-Resch, Cody Wright, Kent Tjardes, George Perry, Kelly Bruns, Bradley Rops
South Dakota Beef Report, 2005
A two-year study was conducted at the South Dakota State University Southeast Research Farm in Beresford, SD, to determine the effects of feeding supplemental dried distillers grains with solubles (DDGS) on the performance of mid-gestation and non-gestating, non-lactating beef cows. Ninety-six gestating beef cows (initial BW = 1276.4 ± 22.2; initial BCS = 4.7 ± 0.09) and 96 non-gestating, non-lactating beef cows (initial BW = 1214.0 ± 20.8; initial BCS = 5.4 ± 0.10) were used for year 1 and year 2, respectively. Cows were stratified by weight and allocated to one of 15 pens. Pens were then randomly assigned …
2004 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
2004 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International "Little I" Agricultural Exposition Catalogs
No abstract provided.
Evaluating Consumer Acceptability Of Various Muscles From The Beef Chuck And Rib, A.C. Kukowski, R.J. Maddock, D.M. Wulf
Evaluating Consumer Acceptability Of Various Muscles From The Beef Chuck And Rib, A.C. Kukowski, R.J. Maddock, D.M. Wulf
Animal Science Faculty Publications
One hundred thirty-eight consumers evaluated steaks from the complexus (CX), infraspinatus (IF), serratus ventralis (SV), supraspinatus (SS), and triceps brachii (TB) from the wholesale beef chuck; the deep pectoral (DP) from the wholesale brisket; and the longissimus thoracis (LT) from the wholesale rib. The LT was used as a reference for comparison to the other muscles. Ten USDA Choice and ten USDA Select boneless boxed beef subprimals were used for each muscle. Subprimals were aged 14 d from box date, frozen, and cut into 2.5-cm-thick steaks. Consumers rated the IF highest (P < 0.05) for overall like, tenderness, juiciness, and flavor, and assigned it the highest (P < 0.05) price/0.45 kg. The TB also was rated higher (P < 0.05) than the LT for overall like, tenderness, juiciness, flavor, and price/0.45 kg. The SV and CX were rated as being similar (P < 0.05) to the LT for overall like, tenderness, juiciness, flavor, and price/0.45 kg. Consumers rated the SS lower (P < 0.05) than the LT for tenderness, juiciness, flavor, and price. The DP was rated as the toughest, driest, and blandest (P < 0.05), resulting in assignment of the lowest (P < 0.05) price/0.45 kg. Differences in palatability ratings due to quality grade were found for several muscles; USDA Choice SV and SS were rated higher (P < 0.05) for overall like, tenderness, and juiciness than USDA Select SV and SS. For the IF, USDA Choice was rated higher (P < 0.05) for tenderness and juiciness than USDA Select. The USDA Choice TB was rated higher (P < 0.05) for juiciness, and the USDA Choice DP was rated higher (P < 0.05) for overall like, than their USDA Select counterparts. Tenderness, juiciness, and flavor ratings were correlated with overall like ratings (r = 0.84, 0.77, and 0.76, respectively) and with price (r = 0.73, 0.70, and 0.68, respectively). These results indicate the IF, TB, SV, and CX were acceptable, whereas and the SS and DP were unacceptable as steaks.
Effects Of Naturalized Population Of Yellow-Flowered Alfalfa On Species Richness And Biomass Production Of Native Rangeland, Lan Xu, Arvid Boe, Patricia Johnson, Kevin Kephart
Effects Of Naturalized Population Of Yellow-Flowered Alfalfa On Species Richness And Biomass Production Of Native Rangeland, Lan Xu, Arvid Boe, Patricia Johnson, Kevin Kephart
South Dakota Beef Report, 2004
The occurrence of naturalized yellow-flowered alfalfa on private and adjacent public rangeland in northwestern South Dakota presents a dilemma. Its ability to reproduce naturally in native rangeland demonstrates its value for rehabilitating severely depleted rangelands and increasing forage production and quality, soil carbon and soil nitrogen levels. On the other hand, the spread of alfalfa into native rangeland potentially threatens native biological diversity and may result in changes in ecological processes and functions (e.g., alteration of pools and flows of energy and nutrients). A study was initiated on the Grand River National Grassland in 2003 to determine the effects of …
Effects Of Prairie Dogs And Cattle On Vegetation Disappearance On Prairie Dog Towns In Mixed-Grass Prairie, Matthew B. Stoltenberg, Patricia S. Johnson, Alexander J. Smart, Lax Xu
Effects Of Prairie Dogs And Cattle On Vegetation Disappearance On Prairie Dog Towns In Mixed-Grass Prairie, Matthew B. Stoltenberg, Patricia S. Johnson, Alexander J. Smart, Lax Xu
South Dakota Beef Report, 2004
Quantitative data is lacking on competition between prairie dogs and cattle for forage on mixed-grass prairie pastures. The objective of this study was to determine the disappearance of vegetation attributable to cattle and prairie dogs on pastures with prairie dog towns. During the summers of 2002 and 2003, biomass estimates were made periodically on three mixed-grass prairie pastures in south central South Dakota that had varying degrees of prairie dog town coverage (percent of pasture area). Two types of grazing exclosures were established. Cattle exclosures allowed grazing by prairie dogs only. Cattle/prairie dog exclosures excluded both herbivores. Permanent plots outside …
Intramuscular Tenderness Variation Within Four Muscles Of The Beef Chuck, Gina A. Searls, Robert J. Maddock, Duane M. Wulf
Intramuscular Tenderness Variation Within Four Muscles Of The Beef Chuck, Gina A. Searls, Robert J. Maddock, Duane M. Wulf
South Dakota Beef Report, 2004
To evaluate the potential for steak production from beef chuck muscles, we evaluated intramuscular tenderness variation within four beef chuck muscles: infraspinatus (IF), supraspinatus (SS), triceps brachii (TB), and serratus ventralis (SV). The IF, SS, TB, and SV muscles were cut into 1-in-thick steaks perpendicular to the long axis of the muscle. An identification tag was placed on each steak consisting of a muscle identification number, steak number, and orientation of the steak. Steaks were vacuum-packaged and stored at -8° F until used. Steaks were thawed at 34° F and broiled on electric broilers to an internal temperature of 160° …
Ability Of Cidrs Or Melengestrol Acetate To Initiate Estrous Cycles In Early Postpartum Beef Cows, G. A. Perry, T. W. Geary
Ability Of Cidrs Or Melengestrol Acetate To Initiate Estrous Cycles In Early Postpartum Beef Cows, G. A. Perry, T. W. Geary
South Dakota Beef Report, 2004
Postpartum anestrous interval in beef cows is a major factor contributing to reproductive failure during a defined breeding season. Our objectives were to determine the ability of a controlled internal drug-releasing device (CIDR), or melengestrol acetate (MGA) to induce ovulation and to eliminate short estrous cycles. Multiparous beef cows (n = 75) were equally assigned by age, days postpartum, body condition, and body weight to one of three treatments: CIDR, MGA, or control. All cows were fed carrier (2 lbs•cow-1•day-1) with MGA (0.25 mg/lb) or without MGA for 7 days (day -6 to 0). On day -6, CIDR were inserted …
Pasture Weaning And Forage Barley To Extend The Grazing Season For Replacement Heifers, R. J. Pruitt, W. B. Epperson, V. N. Owens
Pasture Weaning And Forage Barley To Extend The Grazing Season For Replacement Heifers, R. J. Pruitt, W. B. Epperson, V. N. Owens
South Dakota Beef Report, 2004
In a two-year study at the SDSU Cow/Calf Teaching and Research Unit, Brookings, SD, heifer calves were allotted to two weaning management treatments in early October at an average age of 202 days. The pasture-weaned group was separated from their dams and grazed grass pasture across the fence from their dams for two weeks. Then, until early December, they grazed “Robust” barley (forage type) that had been no-till planted into oat stubble in early August. The drylot-weaned group was fed a traditional weaning diet of grass hay, corn, and protein supplement from weaning until early December. The effect of management …