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Other Animal Sciences

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1992

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Articles 1 - 30 of 86

Full-Text Articles in Life Sciences

Influence Of Fumaric Acid And Calcium Formate On Starter Pig Performance (1992), L J. Kats, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband Jan 1992

Influence Of Fumaric Acid And Calcium Formate On Starter Pig Performance (1992), L J. Kats, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

A 25 d growth trial utilizing 198 pigs was conducted to determine the influence of fumaric acid and calcium formate on starter pig performance. At weaning (19 d of age and 11.9 lb), pigs were blocked by weight and allotted to one of three dietary treatments: a control diet without acid addition or diets containing 1.5% fumaric acid or 1.5% calcium formate. Adding calcium formate to the diet had no influence on average daily gain (ADG), average daily feed intake (ADFI), or feed efficiency (F/G). Pigs fed the diet containing fumaric acid had improved feed efficiency during the first 2 …

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The Effect Of Dietary Soybean Meal Level In Phase I On Subsequent Phase Ii Growth Performance (1992), K G. Friesen, L J. Kats, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach Jan 1992

The Effect Of Dietary Soybean Meal Level In Phase I On Subsequent Phase Ii Growth Performance (1992), K G. Friesen, L J. Kats, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

One hundred and four pigs (initially 11.7 lb and 21 d of age) were used to determine the effect dietary soybean meal has on growth performance in the early-weaned pig. Pigs were fed one of four diets from d 0 to 14 postweaning. Diets were formulated to 1.5% lysine and 24.4% lactose with either 0, 7.5, 15.0, or 22.5% soybean meal. Soybean meal and lactose replaced dried skim milk to maintain equal lysine and lactose levels. From d 14 to 35 postweaning, all pigs were fed a common (1.25% lysine) corn-soybean meal diet containing 10% dried whey and 4% select …

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Short-Run Impact Of Captive Supplies On Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder Jan 1992

Short-Run Impact Of Captive Supplies On Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Factors affecting western Kansas fed cattle prices during May through November 1990 were investigated. In particular, the impact of changes in captive cattle supplies on cash prices was examined. The term captive cattle supplies refers to cattle procured by a packer well in advance of slaughter. Captive supplies take one of three forms: 1) packer-owned cattle, 2) cattle procured on forward contracts, and 3) cattle procured under formula price (or marketing) agreements. Captive supplies were defined as cattle procured under forward contracts or formula price agreements, because data on packer-owned cattle were unavailable. Over the May through November 1990 period …

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Influence Of Source And Amount Of Dietary Protein On The Performance And Reproductive Function Of First-Calf Heifers, W.C. Rusche, R.C. Cochran, L.R. Corah, Jeffrey S. Stevenson, D.L. Harmon Jan 1992

Influence Of Source And Amount Of Dietary Protein On The Performance And Reproductive Function Of First-Calf Heifers, W.C. Rusche, R.C. Cochran, L.R. Corah, Jeffrey S. Stevenson, D.L. Harmon

Kansas Agricultural Experiment Station Research Reports

Increasing the amount of dietary protein above the NRC requirement increased weight gain of nursing first-calf heifers. Feeding a protein source with higher ruminal escape potential and increasing protein in the diet both improved calf gains. No significant changes in reproductive function or milk production were observed from either source or amount of dietary protein.

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Effect Of Long-Acting Penicillin And Levamisole® On Gain And Health Of Stressed Calves, F.K. Brazle Jan 1992

Effect Of Long-Acting Penicillin And Levamisole® On Gain And Health Of Stressed Calves, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to determine the effect of long-acting penicillin and/or levamisole injected at arrival or levamisole injected on day 1 and/or day 7 on the health and gain of newly received, highly stressed, light weight calves. Levamisole injected at arrival reduced (P<.05) sickness of newly arrived calves during the first 5 days. However, it did not reduce overall sickness during the receiving period. Long-acting penicillin injected at arrival did not reduce sickness, but did improve (P<.05) gain of calves during the growing period. The combination of levamisole and long-acting penicillin or the combination of levamisole on day 1 and day 7 did not reduce morbidity in these highly stressed calves.

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Use Of Whey Protein Concentrate, Dried Buttermilk, And Porcine Plasma Protein To Replace Dried Skim Milk In Diets For Weanling Pigs (1992), B T. Richert, Robert H. Hines, Joe D. Hancock Jan 1992

Use Of Whey Protein Concentrate, Dried Buttermilk, And Porcine Plasma Protein To Replace Dried Skim Milk In Diets For Weanling Pigs (1992), B T. Richert, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

One hundred thirty-two weanling pigs, with an average age of 19 d and average weight of 8.4Ib, were used in a 28-d growth assay to determine the effects of replacing dried skim milk (DSM) with dried whey protein concentrate (WPC), dried buttermilk (DBM), and spray-dried porcine plasma (SDPP). Treatments were 1) 20% DSM20% dried whey-based control, 2) WPC used to replace the DSM of Diet 1, 3) DBM used to replace the DSM of Diet 1, and 4) SDPP and lactose used to replace the DSM of Diet 1. All diets were formulated to 1.4% lysine, 25% lactose, 5% fat, …

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Comparison Of Avian And Bovine Spray-Dried Blood Meal And Whey Levels In Starter Pig Diets (1992), L J. Kats, Steven S. Dritz, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband Jan 1992

Comparison Of Avian And Bovine Spray-Dried Blood Meal And Whey Levels In Starter Pig Diets (1992), L J. Kats, Steven S. Dritz, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

A total of 420 weanling pigs was used in a growth trial having two objectives. Objective 1 was to compare spray-dried avian blood meal and spray-dried bovine blood meal as protein sources in the phase II diet (d 7-21 postweaning). Objective 2 was to determine the appropriate level of dried whey for a phase II diet containing 2.5% spray-dried bovine blood meal. During phase I (d 0-7 postweaning), all pigs were fed a common high nutrient density pelletized diet containing 1.5% lysine, 20% dried edible grade whey, 7.5% spray-dried porcine plasma, and 1.75% spray-dried bovine blood meal. All phase II …

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Effects Of Spray-Dried Porcine Plasma In The High Nutrient Density Diet (1992), L J. Kats, K G. Friesen, J A. Hansen, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach, Steven S. Dritz Jan 1992

Effects Of Spray-Dried Porcine Plasma In The High Nutrient Density Diet (1992), L J. Kats, K G. Friesen, J A. Hansen, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 740 weanling pigs was used in three separate experiments to evaluate the effects of additions of spray-dried porcine plasma in the HNDD starter diet. In Trial 1, 534 weanling pigs (initially 14.1 lb and 21 d of age) were used to evaluate various levels of spray-dried porcine plasma. Pigs were assigned to one of six experimental diets with either 0, 2, 4, 6, 8, or 10% spray-dried porcine plasma replacing dried skim milk. Pigs were fed this diet for the first 14 days postweaning, when they were switched to a common phase II diet (d 14 to …

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The Influence Of Genotype, Sex, And Dietary Lysine On Carcass Quality Characteristics Of 230 And 280 Lb Finishing Pigs (1992), S R. Stuewe, K G. Friesen, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh Jan 1992

The Influence Of Genotype, Sex, And Dietary Lysine On Carcass Quality Characteristics Of 230 And 280 Lb Finishing Pigs (1992), S R. Stuewe, K G. Friesen, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

When pigs were fed to 230 Ib, high-lean genotype loin eyes had less visual marbling and a higher saturation index (more vivid or intense color) than medium-lean genotype loin eyes. Loin eye chops from high-lean gilts had greater cooking losses and WarnerBratzler shear values (mechanically tougher) than those from high-lean barrows and medium-lean barrows and gilts. When pigs were fed to 280 Ib, medium-lean genotype loin eyes had a lighter color visually and indicated by Hunter L* values, more marbling, less firmness, more moisture exudate, and a higher chop thaw loss than high-lean loin eyes. Barrow loin eyes had more …

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Influence Of High Levels Of B-Vitamins On Starter Pig Performance (1992), L J. Kats, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 1992

Influence Of High Levels Of B-Vitamins On Starter Pig Performance (1992), L J. Kats, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 318 pigs was used in a 25-d growth trial to determine the influence of high levels of B-vitamins on starter pig performance. At weaning (l6-d of age), pigs were blocked by weight to one of six dietary treatments based on B-vitamin level. The negative control diet contained the standard KSU B-vitamin additions. The next four diets contained vitamin B12, riboflavin, pantothenic acid, or niacin at lOx the level recommended by NRC (1988). The positive control diet contained all four vitamins at 10 x the levels suggested by NRC (1988). B-vitamin inclusion rate did not influence average daily …

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Red Kangaroos Can Set Back Range Regeneration, Andrew Mclaughlin Jan 1992

Red Kangaroos Can Set Back Range Regeneration, Andrew Mclaughlin

Journal of the Department of Agriculture, Western Australia, Series 4

After years of severe drought, stocking rates in Western Australia s arid rangelands have been kept low since the 1970s to allow native pastures to regenerate. As well, extensive re-seeding programs have started and sheep and cattle grazing on these areas has been restricted or eliminated. However, pasture regeneration in the rangelands can only succeed when grazing by all animals - sheep, cattle, kangaroos, goo.ts, camels, brumbies and donkeys - is controlled Many more red kangaroos roam throughout Western Australia's pastoral areas today than 20 years ago. The installation of windmills and troughs to water domestic livestock has allowed kangaroo …

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Extruded Corn, Sorghum, Wheat, And Barley For Finishing Pigs (1992), B T. Richert, Terry L. Gugle, Robert H. Hines, Joe D. Hancock Jan 1992

Extruded Corn, Sorghum, Wheat, And Barley For Finishing Pigs (1992), B T. Richert, Terry L. Gugle, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Eighty barrows (113.7 lb average initial weight) were used to determine the effects of extruding corn, sorghum, wheat, and barley on growth performance, carcass merit, nutrient digestibility, and changes in stomach morphology of finishing pigs. Treatments were grain source (com, sorghum, wheat, and barley) and processing procedure (grinding vs extrusion) arranged as a 4 x 2 factorial. Grinding was in a Jacobson hammermill and extrusion was in an Insta-Pro extruder. Pigs fed com had improved average daily gain (ADG), feed/gain (F/G), DM digestibility, and N digestibility compared to the other grain sources. Diets with barley supported the poorest growth performance …

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Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope Jan 1992

Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

One hundred-eighty British crossbred steers (760 lb) were used in a 3x2 factorially arranged experiment to evaluate the main effects of alfalfa form (chopped hay, dehydrated pellets, or a 50:50 mixture of hay:dehy) and level (5 or 10% of diet DM) on finishing steer performance. Alfalfa (third-cutting, 23.9% CP) was harvested in alternate rows from a common field. No interactions between alfalfa form and level were detected. Steers fed chopped hay or the 50:50 mixture gained faster (P<.05), consumed more feed (P<.05), and had heavier final and carcass weights (P<.05) than steers fed dehy pellets. Steers fed 10% alfalfa gained faster (P<.05), consumed more feed (P<.0003), and had heavier carcass weights (P<.02) vs those fed 5% alfalfa. Feed efficiency was unaffected by alfalfa form or level. Lower feed intakes and numerically higher incidences of liver abscesses indicated less ruminal tactile stimulation and more subacute acidosis for dehy pellets vs hay or the 50:50 mixture and for 5 vs 10% alfalfa, respectively. Positive associative responses of 5.1% (P = .07) on daily gain and 2.9% (P = .11) on dry matter intake suggested that the 50:50 mixture provided enough long particles for adequate rumen function at the alfalfa levels studied. Our results suggests more dehy pellets than chopped hay must be fed to provide similar roughage value.

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Influence Of Frequency Of Energy Supplementation On Utilization Of Early-Summer, Tallgrass Prairie Forage, J.L. Beaty, R.C. Cochran, B.A. Lintzenich, E.S. Vanzant Jan 1992

Influence Of Frequency Of Energy Supplementation On Utilization Of Early-Summer, Tallgrass Prairie Forage, J.L. Beaty, R.C. Cochran, B.A. Lintzenich, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Fifteen ruminally cannulated beef steers were used in a pasture supplementation experiment to determine the effects of frequency of energy supplementation on intake and digestion of tallgrass prairie forage during early to mid-summer. Steers grazed a common pasture and were assigned to the following treatments: no supplement (control); 4 lb rolled sorghum grain/head/day; 9.3 lb grain/head/3 times weekly. Steers in the two supplemented groups consumed the same amount of sorghum grain/head/week. In general, supplementation was not harmful (P =.17) to forage intake. However, providing supplement 3 times weekly tended (P =.11) to depress forage intake compared with daily supplementation. Although …

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The Effect Of L-Carnitine Additions On Performance And Carcass Characteristics Of Growing-Finishing Swine (1992), K Q. Owen, T L. Weeden, Jim L. Nelssen, Robert D. Goodband Jan 1992

The Effect Of L-Carnitine Additions On Performance And Carcass Characteristics Of Growing-Finishing Swine (1992), K Q. Owen, T L. Weeden, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

An experiment was conducted to evaluate the efficacy of dietary carnitine on growth performance and carcass characteristics of growing-finishing swine. The trial was designed to investigate the response of pigs fed carnitine from weaning to market vs control pigs receiving no carnitine. In addition, the performance of these pigs was compared to that of pigs fed carnitine only during the starter or finishing phases. The trial was broken down into the following four phases: 1) phase I (0 to 14 d post weaning) 2) phase II (14 to 35 d post weaning) 3) grower (d 35 to 135 lb), and …

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Endotoxin, Ammonia, And Total And Respirable Dust In Swine Confinement Buildings: The Effect Of Recirculated Air And Respiratory Protective Masks (1992), J A. Pickrell, A J. Heber, James P. Murphy, M M. May, D Nolan, F W. Oehme, D Schoneweis, J R. Gillespie, Steven C. Henry Jan 1992

Endotoxin, Ammonia, And Total And Respirable Dust In Swine Confinement Buildings: The Effect Of Recirculated Air And Respiratory Protective Masks (1992), J A. Pickrell, A J. Heber, James P. Murphy, M M. May, D Nolan, F W. Oehme, D Schoneweis, J R. Gillespie, Steven C. Henry

Kansas Agricultural Experiment Station Research Reports

Caretakers and pigs in dusty environments with particles and toxic gases may sustain health consequences. We studied concentrations of ammonia, endotoxin, and total and respirable dust particles in four mechanically ventilated swine nurseries and two grower facilities using an ammonia sampler, filter, and British cyclone. In two of the nursery facilities, we determined the protection offered by respiratory masks that were mounted on glass funnels with filters or British cyclones and sampled for dust. In response to the increasing summer ventilation, large, nonrespirable particle concentrations in swine building atmospheres were reduced more completely by ventilation air movement than smaller respirable …

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Sustained Effects Of Porcine Somatotropin Administered During The Growing Period On Growth And Carcass Characteristics Of Finishing Pigs (1992), G E. Fitzner, Donald H. Kropf, Robert H. Hines Jan 1992

Sustained Effects Of Porcine Somatotropin Administered During The Growing Period On Growth And Carcass Characteristics Of Finishing Pigs (1992), G E. Fitzner, Donald H. Kropf, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Forty six barrows were fed a common diet after completing a 35 d growth trial in which 50% received 5 mg/d of pST and the other 50% a placebo injection. At the conclusion of the growing trial (130 lb), the pST-injected pigs were leaner (22%) and yielded carcasses with larger longissimus muscle area (21 %). However, pigs fed to a slaughter weight of 225 lb yielded carcasses that were not different from control pigs in length, longissimus muscle area, or belly weights. Pigs administered pST during the growing phase continued to have 10% less backfat, which resulted in a 1.6% …

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The Effects Of Diets Formulated On An Ideal Protein Basis On Growth Performance And Carcass Characteristics Of Finishing Gilts Housed In A Hot Diurnal Environment (1992), J Lopez, G W. Jesse, D Spiers, B A. Becker, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach Jan 1992

The Effects Of Diets Formulated On An Ideal Protein Basis On Growth Performance And Carcass Characteristics Of Finishing Gilts Housed In A Hot Diurnal Environment (1992), J Lopez, G W. Jesse, D Spiers, B A. Becker, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

Forty-eight finishing gilts (initial weight = 155 ± 2 lb) were randomly assigned to one of eight experimental treatments in a 2 x 2 x 2 factorial arrangement with main effects including dietary lysine (.60 vs 1.00%), source of amino acid fortification (intact protein vs synthetic amino acids formulated on an ideal protein basis) and environmental temperature (thermoneutral (TN): 68°F vs hot, diurnal (HS): 82 to 95 °F). The ideal protein diets were formulated by using corn and soybean meal to meet the 5th limiting amino acid with additions of synthetic lysine, threonine, tryptophan, methionine, or isoleucine to meet the …

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Effects Of The Interrelationship Between Dietary Lysine And Litter Size On Sow And Litter Performance (1992), J L. Laurin, R D. Anderson, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach Jan 1992

Effects Of The Interrelationship Between Dietary Lysine And Litter Size On Sow And Litter Performance (1992), J L. Laurin, R D. Anderson, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

One hundred and forty-three lactating primiparous sows were used in a study to determine the influence of four different litter sizes on the dietary lysine requirement as measured by sow and litter performance. At farrowing, sows were randomly assigned to one of three corn soybean meal diets (.67, .94, or 1.22 % lysine) and one of four litter sizes (8, 9, 10, or 11 pigs). Sows were fed 7.7, 9.9, and 12.1 IbId of their respective diet for the first, second, and third week of lactation. This provided an average daily lysine intake of 30.1, 42.2, or 54.8 gld throughout …

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Comparison Of Oral Iron And Injectable Iron For The Prevention Of Iron Deficiency Anemia In Baby Pigs (1992), K B. Beeman, D A. Schoneweis Jan 1992

Comparison Of Oral Iron And Injectable Iron For The Prevention Of Iron Deficiency Anemia In Baby Pigs (1992), K B. Beeman, D A. Schoneweis

Kansas Agricultural Experiment Station Research Reports

One of two oral iron compounds or an injectable iron (100 mg iron per treatment) were administered to pigs on d 1 and 15 postfarrowing, and they were compared with untreated littermates. There was no significant difference between the pigs receiving the oral iron and the negative controls in serum iron or total iron binding capacity. Pigs that received iron by injection had higher serum iron and packed cell volume and a lower total iron binding capacity compared with pigs given oral iron or untreated controls.; Swine Day, Manhattan, KS, November 19, 1992

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Effects Of Interactions Between Aspergillus Oryzae Extract (Amaferm) And Antimicrobial Compounds On The Growth Of Ruminal Bacteria, A.A. Beharka, Tiruvoor G. Nagaraja Jan 1992

Effects Of Interactions Between Aspergillus Oryzae Extract (Amaferm) And Antimicrobial Compounds On The Growth Of Ruminal Bacteria, A.A. Beharka, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

The effect of Amaferm, with or without antimicrobial compounds, was determined on the growth rate of pure cultures of predominant ruminal bacteria. Adding Amaferm to media containing chlortetracyline or neomycin tended to diminish the negative effects of those compounds on the growth rate of some ruminal bacteria, even when they had shown no positive response to Amaferm alone. However, adding Amaferm to media containing tylosin decreased the growth rate of Selenomonas ruminantium D. These results indicate that Amaferm interacts both positively and negatively with certain antimicrobial compounds.

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Use Of Low-Level Grain Supplementation In An Intensive-Early Stocking Program: Influence On Daily Gain And Forage Production, R.C. Cochran, E.S. Vanzant, Robert T. Brandt Jr., Clenton E. Owensby, Lisa M. Auen Jan 1992

Use Of Low-Level Grain Supplementation In An Intensive-Early Stocking Program: Influence On Daily Gain And Forage Production, R.C. Cochran, E.S. Vanzant, Robert T. Brandt Jr., Clenton E. Owensby, Lisa M. Auen

Kansas Agricultural Experiment Station Research Reports

A 4-year experiment was conducted to evaluate the effect of increasing amounts of grain supplementation on steer gains and forage production in pastures managed under an intensive-early stocking system. Average daily gain tended to increase in direct proportion to increasing level of sorghum grain supplementation (2.19, 2.43 and 2.59 lb/day for the control, 2 and 4 lb/day supplement levels, respectively). The amount of grass remaining in the pastures at the end of the grazing season (approximately July 15) also increased in direct proportion to increasing sorghum grain supplementation. Forage remaining in the pastures at the end of the growing season …

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Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin F2Α System: Iii. Timed Insemination After 72 Hours Of Estrous Detection, Robert L. Larson, L.R. Corah Jan 1992

Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin F2Α System: Iii. Timed Insemination After 72 Hours Of Estrous Detection, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

The percentage of heifers conceiving to artificial insemination (AI) following melengestrol acetate/prostaglandin F2"(MGA®/PG) estrous synchronization can be increased by mass insemination of all heifers not showing estrus by 72 h after PG. Inseminating at 12 h after estrus detection all heifers showing estrus within 72 h after PG; then inseminating those not detected in estrus by 72 h after PG as a group increased the proportion of heifers conceiving to AI by 10.8%.

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Synchronization Of Estrus In Yearling Beef Heifers With The Melengestrol Acetate®/Prostaglandin F2"System: Ii. Timed Insemination, Robert L. Larson, L.R. Corah, S.V. Viker Jan 1992

Synchronization Of Estrus In Yearling Beef Heifers With The Melengestrol Acetate®/Prostaglandin F2"System: Ii. Timed Insemination, Robert L. Larson, L.R. Corah, S.V. Viker

Kansas Agricultural Experiment Station Research Reports

Inseminating heifers 72 hr after the PG injection in the melengestrol acetate/ prostaglandin F (MGA®/PG) estrous synchronization system, without regard to behavioral estrus, tended to improve (P=.2) the percent of heifers pregnant to artificial insemination (AI) when compared to synchronized heifers bred 12 h after they were first detected in estrus. In the timed inseminated treatment, heifers exhibiting behavioral estrus 48 to 72 h after PG tended to have a higher (P<.12) conception rate to AI than heifers showing estrus within 48 h after PG. For situations in which the number of heifers conceiving to AI is more economically important than first service conception rate, or when labor restrictions make estrous detection impossible, timed insemination at 72 h after PG in the MGA/PG system shows promise as a management option.

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Effects Of Niacin And Aspirin On Serum Prolactin And Body Temperature Of Heifers Fed Endophyte-Infected Tall Fescue, Robert L. Larson, L.R. Corah Jan 1992

Effects Of Niacin And Aspirin On Serum Prolactin And Body Temperature Of Heifers Fed Endophyte-Infected Tall Fescue, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Feeding niacin to cattle consuming endophyte (Acremonium coenophialum)-infected tall fescue elevated their serum prolactin concentrations to levels similar to those of heifers fed hay containing a low content of endophyte. Heifers fed high-endophyte hay, with or without aspirin, had lower serum prolactin concentrations than heifers fed low-endophyte fescue hay (P<.1). Compared to control cattle fed high-endophyte hay, neither niacin nor aspirin lowered morning or evening body temperatures during the period August 16 to September 4. Feeding aspirin did not lower body temperature or increase prolactin concentration in animals fed high-endophyte fescue forage. Some benefit was seen when niacin was added to the diet, as evidenced by higher (P<.01) prolactin concentrations; however body temperature was not lowered.

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Factors Affecting Variability In Feedlot Steer Profits, Michael R. Langemeier, J. Mintert, Ted C. Schroeder Jan 1992

Factors Affecting Variability In Feedlot Steer Profits, Michael R. Langemeier, J. Mintert, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

This study examined the relative importance of price and animal performance factors on cattle finishing profitability. Using data from a single feedlot, sale prices, feeder prices, and corn prices explained 90 to 95% of the variation in steer profits. About 50% of the variability was explained by fed cattle prices alone. Because sale, feeder, and corn prices have a large impact on profits per head, cattle feeders should attempt to manage the risks associated with these three factors.

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Effect Of Presponse® On The Gain And Health Of Long-Hauled, Newly Arrived Calves, F.K. Brazle Jan 1992

Effect Of Presponse® On The Gain And Health Of Long-Hauled, Newly Arrived Calves, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Five hundred mixed-breed steer and bull calves (246 lbs) were divided into two treatment groups, with one group receiving a new Pasteurella haemolytica vaccine (Presponse®) at arrival. There was no difference between groups in terms of gain, mortality, or morbidity during the 32-day receiving study. The Presponse group required fewer (P<.09) medication days per animal purchased, resulting in $1.68 less drug cost per head than the control group.

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Influence Of Limited Creep Feeding On Pre- And Post-Weaning Performance Of Spring Born Calves, F.K. Brazle, Gerry L. Kuhl, C.E. Binns, K.O. Zoellner, L.R. Corah, R.R. Schalles Jan 1992

Influence Of Limited Creep Feeding On Pre- And Post-Weaning Performance Of Spring Born Calves, F.K. Brazle, Gerry L. Kuhl, C.E. Binns, K.O. Zoellner, L.R. Corah, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Spring-born suckling beef calves were offered salt-limited creep feeds containing either high protein, high energy, or energy plus Bovatec® from August 15 to October 15 in a 3- year study. Creep feeding improved (P<.01) daily gain over controls, but no differences were attributable to creep composition. Daily creep feed consumption was somewhat less for the protein fed group, resulting in improved feed conversion compared to the energy-based supplement, with the energy plus Bovatec creep feed intermediate in efficiency. Creep feeding improved 53-day postweaning gains (P<.01). Overall, limited creep feeding boosted both pre- and postweaning performance, with no difference in gain among the three types of creep rations studied.

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Performance And Carcass Characteristics Of Cull Beef Cows Implanted With Growth Promotants And Fed A High Concentrate Ration, C.D. Cranwell, D.D. Simms, J.R. Brethour, John A. Unruh Jan 1992

Performance And Carcass Characteristics Of Cull Beef Cows Implanted With Growth Promotants And Fed A High Concentrate Ration, C.D. Cranwell, D.D. Simms, J.R. Brethour, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

Open, cull beef cows fed a high concentrate ration for 28 or 56 days and implanted with Finaplix-H®, Synovex-H®, or both had improved gain and feed efficiency compared to controls (nonimplanted cows). Changes in ultrasound-measured backfat (12th rib) of implanted cows and controls were similar in both feeding periods. Marbling, fat color, and tenderness, as measured by Warner-Bratzler shear force, were not improved by feeding cows for 56 days compared to 28 days. However, lean color, dressing percent, and ribeye area were improved by feeding for 56 days. Numerical yield grade was lower (P<.05) in 28-day fed cows. Implanting with Synovex-H or Finaplix-H resulted in leaner carcasses with lower yield grades compared to controls. Ribeye area was increased by using Synovex-H compared to controls and Finaplix- H. These data indicate that the benefits in gain, feed efficiency, and carcass traits from implanting cull cows can be obtained by using either Synovex-H or Finaplix-H alone.

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Effect Of Feed Additives On Shipping Shrinkage Of Yearling Heifers, F.K. Brazle Jan 1992

Effect Of Feed Additives On Shipping Shrinkage Of Yearling Heifers, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to determine the effect of feed additives on the transit shrink of yearling cattle. In Trial I, 146 mixed-breed heifers were offered a mineral mixture containing either Terramycin® or Bovatec®, or without additive while grazing native grass pastures. Shrinkage after 300 miles in transit was lower (P<.09) for Bovatec-fed heifers than the other groups. In Trial II, 60 mixed-breed heifers were offered free choice prairie hay, plus soybean hulls without additive or containing either Aureomycin ®, Rumensin, or Bovatec®. Both ionophores tended to reduce live weight shrink following a 10-hour withholding of feed and water, but treatment differences were not significant (P>.05). The small shrinkage differences observed in these two trials would not justify changes in the weighing practices of feeder cattle.

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