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Articles 1 - 16 of 16
Full-Text Articles in Life Sciences
Cottonwood And Antelope Range Livestock Research Stations Unit Report, Kenneth C. Olson
Cottonwood And Antelope Range Livestock Research Stations Unit Report, Kenneth C. Olson
South Dakota Beef Report, 2007
Two research stations, the Cottonwood and Antelope Range Livestock Research Stations, are located in western South Dakota that allow research projects focused on needs of range livestock producers in that region. The stations are comprised primarily of native rangeland that is grazed by cattle at both stations, and also by sheep at Antelope. The philosophy of the research efforts has been focused on conducting applied research to solve problems and address rangeland and livestock management opportunities relevant to the livestock producers and land mangers of the region.
Evaluation Of Mixing Characteristics Of Diets Containing Modified Distillers Grains, Erik R. Loe, Bradley D. Rops, John T. Keimig
Evaluation Of Mixing Characteristics Of Diets Containing Modified Distillers Grains, Erik R. Loe, Bradley D. Rops, John T. Keimig
South Dakota Beef Report, 2007
Six mixes of feed were manufactured and analyzed to determine how sequence of ingredient addition into a feed mixer influences mixing characteristics when modified distillers grains (mDG) was used as a feed ingredient. Five mixes were manufactured using a 3-bar rotor mixer and one mix was manufactured using a staggered-rotor mixer. There were three diet types evaluated: 1) high-forage receiving diet; 2) high-grain finishing diet with ground grass hay (GH) as the roughage source; and 3) high-grain finishing diet with silage as the roughage source. Five samples were collected from each mix and were analyzed for particle size and nutrient …
The Effect Of Gnrh At Time Of Insemination On Initiation Of Lh Pulses And Subsequent Progesterone, Sarah D. Fields, Brandy L. Perry, George A. Perry
The Effect Of Gnrh At Time Of Insemination On Initiation Of Lh Pulses And Subsequent Progesterone, Sarah D. Fields, Brandy L. Perry, George A. Perry
South Dakota Beef Report, 2007
Research has indicated that luteinizing hormone (LH) pulses play a vital role in corpus luteum (CL) formation and subsequent progesterone concentrations. Therefore, our objectives were to determine: 1) when LH pulses begin following onset of estrus, 2) the effect an injection of gonadotropin releasing hormone (GnRH) would have on initiation of LH pulses, and 3) the effect LH pulse initiation had on subsequent plasma progesterone concentrations. Cows were synchronized with the Select Synch + Controlled Internal Drug Releasing device (CIDR) protocol (d -7 100 μg GnRH and CIDR; d 0 25 mg prostaglandin (PG) and removal of CIDR; estrus detected …
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Cow Performance, Igf-1, Gh, And Nefa Concentrations, Abigail Bartosh, Cody Wright, Aimee Wertz-Lutz, George Perry
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Cow Performance, Igf-1, Gh, And Nefa Concentrations, Abigail Bartosh, Cody Wright, Aimee Wertz-Lutz, George Perry
South Dakota Beef Report, 2007
Research has demonstrated that supplemental fat and(or) changes in growth hormone (GH) or insulin-like growth factor-1 (IGF-1) concentrations may affect reproductive performance in beef females. Dried distillers grains with solubles (DDGS) contain approximately 10% to 15% fat; however, minimal research to date has investigated DDGS specifically as a supplemental fat source. The objective of this experiment was to investigate whether supplemental fat from either DDGS or raw corn oil impacts cow growth performance and plasma GH, IGF-1, or non-esterified fatty acid (NEFA) concentrations. Sixty open beef cows [body weight (BW) = 553.5 ± 38.7 kg; body condition score (BCS) = …
Dust Emission From South Dakota Cattle Feedlots, Rick Weber
Dust Emission From South Dakota Cattle Feedlots, Rick Weber
The Journal of Undergraduate Research
Dust and particle emissions (PM) from cattle feedlots is a concern for producers in order to maintain good relations with neighbors and also to comply with the EPA proposed PM2.5 particulate emission rules. Dust at 2.5 microns, which cannot be seen by the naked eye, is a potential health hazard since it can be ingested into the lungs of humans. One of the proposed regulations of the Federal Clean Air Act is to apply the PM2.5 standard to the agricultural sector. This research project examines the particulate matter dust emissions of various sizes in microns including 2.5, 10, …
Dairy Digest 2007, South Dakota State University Dairy Club
Dairy Digest 2007, South Dakota State University Dairy Club
Dairy Digest
No abstract provided.
Effects Of Increasing The Energy Density Of A Lactating Ewe Diet By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
Effects Of Increasing The Energy Density Of A Lactating Ewe Diet By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
South Dakota Sheep Research Reports, 2006-07
The objective of this experiment was to determine the effects of increasing the energy density of a lactating ewe diet by replacing grass hay (GH) with soybean hulls (SH) and replacing soybean meal (SBM) with dried distillers grains with solubles (DDGS) on ewe body condition, milk production and nutrient composition, and lamb performance. Sixteen 2-year-old ewes were selected based on a common lambing date. All diets contained 60% roughage and 40% concentrate. Dietary roughage source, however varied from completely GH to completely SH, and SBM was replaced by DDGS. Diets were formulated to contain 13.9% CP and an increasing amount …
Effects Of Increasing The Dietary Energy Density By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles On Nutrient Digestibility And Rumen Fermentation, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
Effects Of Increasing The Dietary Energy Density By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles On Nutrient Digestibility And Rumen Fermentation, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
South Dakota Sheep Research Reports, 2006-07
We hypothesize that soybean hulls (SH) and dried distillers grains with solubles (DDGS) can be used in lamb diets to increase dietary energy density compared with a traditional grass hay (GH) and soybean meal (SBM) diet without causing adverse effects on nutrient digestibility and rumen function. To test this hypothesis, four ruminally-cannulated wethers were used in a 4x4 Latin square design to determine the effects of replacing GH with SH and replacing SBM with DDGS on nutrient digestibility and rumen fermentation. All diets were formulated to contain 60% roughage and 40% concentrate on DM basis. Dietary roughage source, however, varied …
Cow Condition And Reproductive Performance, Julie Walker, George Perry
Cow Condition And Reproductive Performance, Julie Walker, George Perry
Animal Science Faculty Publications
It has been understood for decades that reproductive performance is the most important factor affecting production efficiency of a cow-calf enterprise. To maintain a yearly calving interval (one calf every 365 days), a cow must re-breed in 80 to 85 days after calving. With the nutrient priority of beef cattle being body maintenance, growth, lactation, fetal growth, breeding, and body reserve according to Short et al. (1990) indicates that reproduction is low on the list. Body condition score at parturition has been implicated as the single most important factor affecting postpartum interval to estrus and pregnancy in multiparous cows.
Influence Of Post-Ai Nutrition On Blood Urea Nitrogen, Progesterone, And Pregnancy, George Perry, Brandi Perry, Josh Nelson, Julie Walker, Cody Wright
Influence Of Post-Ai Nutrition On Blood Urea Nitrogen, Progesterone, And Pregnancy, George Perry, Brandi Perry, Josh Nelson, Julie Walker, Cody Wright
South Dakota Beef Report, 2007
Research has shown that changes in nutrition can have an effect on reproductive performance. Our objective was to determine the effect of post-AI nutrition on BCS, blood urea nitrogen (BUN), progesterone, and pregnancy rates. Forage-developed Angus-cross bred heifers (n = 336) were synchronized with the Select Synch+ Controlled Internal Drug Releasing device (CIDR) protocol (d -7 100 μg GnRH and CIDR; d 0 25 mg PG and removal of CIDR). Estrus was detected for 72 h and heifers bred by AI 12 h after being detected in estrus; heifers not in detected in estrus were bred by AI and given …
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.
Plasma Ghrelin Concentrations Of Beef Cattle Consuming A Similar Amount Of Dietary Energy Supplied By Different Ingredients, Aimee Wertz-Lutz, Jeff Clapper, Jenny Thurlow, Donald Beitz, Allen Trenkle
Plasma Ghrelin Concentrations Of Beef Cattle Consuming A Similar Amount Of Dietary Energy Supplied By Different Ingredients, Aimee Wertz-Lutz, Jeff Clapper, Jenny Thurlow, Donald Beitz, Allen Trenkle
South Dakota Beef Report, 2007
Previous research demonstrated that restricting nutrient intake by decreasing DMI of a high-grain diet increased plasma ghrelin concentrations. Objectives of this experiment were to determine 1) whether dietary ingredient composition influenced plasma ghrelin concentrations when energy intake was similar, and 2) whether relationships existed between plasma ghrelin concentrations and plasma insulin, NEFA, and GH concentrations or end-products of carbohydrate fermentation in the rumen. Five steers (1290 ± 39.9 lb) were used in a crossover design with dietary treatments of 50% hay-50% concentrate (HAY) offered at an amount that would meet the steer’s NEm requirement plus supply an additional 3.5 Mcal …
2007 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
2007 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, 2007
This is the 2007 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 2007. 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.
Relationship Of Plasma Ghrelin Concentrations With End-Products Of Carbohydrate Fermentation For Beef Cattle During A Feeding Interval, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
Relationship Of Plasma Ghrelin Concentrations With End-Products Of Carbohydrate Fermentation For Beef Cattle During A Feeding Interval, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
South Dakota Beef Report, 2007
Four steers (BW 1281±28.2 lb) were used to determine the relationship of plasma ghrelin concentrations with end-products of carbohydrate fermentation and hormones and metabolites indicative of nutrition status during a 12-h feeding interval. A common high-energy diet was offered at 240% of the intake necessary for BW maintenance (2.4xM) or 80% of the intake necessary for BW maintenance (0.8xM). At initiation of period I, 2 steers were allowed 2.4xM intake, whereas intake for the remaining 2 steers was restricted to 0.8xM. Equal aliquots of feed were offered at 0800 and at 2000 h. On 7, 14, and 21 d following …
Prolonged, Moderate Nutrient Restriction In Beef Cattle Results In Persistently-Elevated Plasma Ghrelin Concentrations, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
Prolonged, Moderate Nutrient Restriction In Beef Cattle Results In Persistently-Elevated Plasma Ghrelin Concentrations, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
South Dakota Beef Report, 2007
Four steers (BW 1281±28.2 kg) were used in a crossover design to determine the effects of prolonged, moderate energy and protein restriction on plasma ghrelin and GH concentrations. A common high-energy diet was offered at 240% of the intake necessary for BW maintenance (2.4xM) or 80% of the intake necessary for BW maintenance (0.8xM). As a common starting point, all steers were adjusted to 2.4xM during a 23-d pre-trial adaptation period. At initiation of period 1, 2 steers remained at 2.4xM, whereas intake for the remaining 2 steers was restricted to 0.8xM. Feed allotments were offered twice daily in equal …
Status, Distribution, And Density Of White-Tailed Jackrabbits And Black-Tailed Jackrabbits In South Dakota, Dustin J. Schaible
Status, Distribution, And Density Of White-Tailed Jackrabbits And Black-Tailed Jackrabbits In South Dakota, Dustin J. Schaible
Electronic Theses and Dissertations
The status of jackrabbit (Lepus spp.) populations throughout the Northern Great Plains has been a cause for concern by wildlife managers in recent years and there has been a paucity of information about the ecology of the white-tailed jackrabbit (Lepus townsendii) and the black-tailed jackrabbit (Lepus californicus) in South Dakota. Since there have been little monitoring efforts for hares, 21 permanent spotlight line transects were established across South Dakota for future surveying efforts. These transects were surveyed to obtain baseline information about jackrabbit density and distribution throughout the state. Jackrabbit density was highest in the northwestern portions of the state …