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Kansas Agricultural Experiment Station Research Reports

1993

Other Animal Sciences

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Articles 1 - 30 of 95

Full-Text Articles in Life Sciences

Whole-Plant Corn, Forage Sorghum, And Grain Sorghum Silages For Growing Cattle, B.S. Dalke, R.N. Sonon, S.M. Gramlich, K.K. Bolsen Jan 1993

Whole-Plant Corn, Forage Sorghum, And Grain Sorghum Silages For Growing Cattle, B.S. Dalke, R.N. Sonon, S.M. Gramlich, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

Agronomic and cattle performance traits were measured for eight silages produced in 1991. The silages were: irrigated Pioneer 3377 corn; dryland (early-planted) DeKalb 535 corn; irrigated and dryland DeKalb DK 42Y grain sorghum; and dryland forage sorghums Cargill 200F, Pioneer 947, Northrup King (NK) 300, and Funk's 102F. The irrigated corn and NK 300 and Funk's 102F forage sorghums had the highest whole-plant dry matter (DM) yields per acre; early-planted corn had the lowest yield. The dryland grain sorghum had the highest grain yield and the early-planted corn, the lowest. Average daily gains (ADG) were excellent for steers fed each …

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Factors Affecting Pregnancy Rates And Calving Difficulty In Commercial Beef Heifers, S.D. Utter, P.L. Houghton, L.R. Corah, M.F. Spire, James J. Higgins, M.D. Butine Jan 1993

Factors Affecting Pregnancy Rates And Calving Difficulty In Commercial Beef Heifers, S.D. Utter, P.L. Houghton, L.R. Corah, M.F. Spire, James J. Higgins, M.D. Butine

Kansas Agricultural Experiment Station Research Reports

Data from yearling Angus and Angus crossbred beef heifers from a commercial ranch were used to identify factors affecting pregnancy rates (n=342) and calving difficulty (n=295). Production data analyzed included prebreeding weight, average daily gain during the breeding season, and postbreeding weight; evaluations of hip height, frame score, weight:height ratio, and reproductive tract score were made at approximately 1 yr of age. Pregnancy rates were affected significantly by weight:height ratio, prebreeding weight, and reproductive tract score. However, based on correlation coefficients, the magnitude of influence of these traits on first-service conception and overall pregnancy rates was low. Calving difficulty in …

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Rate And Extent Of Losses From Top Spoilage In Alfalfa Silages Stored In Bunker Silos, D.L. Holthaus, D.R. Bonilla, L. Pfaff, D. Haverkamp, B.S. Dalke, R.N. Sonon, K. Budiongo, K.K. Bolsen, Matthew A. Young Jan 1993

Rate And Extent Of Losses From Top Spoilage In Alfalfa Silages Stored In Bunker Silos, D.L. Holthaus, D.R. Bonilla, L. Pfaff, D. Haverkamp, B.S. Dalke, R.N. Sonon, K. Budiongo, K.K. Bolsen, Matthew A. Young

Kansas Agricultural Experiment Station Research Reports

Alfalfa silages were made in pilot- and farm-scale silos, and five sealing treatments were compared. After 90 days, sealing dramatically reduced DM losses at the 5 and 10 in. depths in the farm silos and at the 0 to 12, 12 to 24, and 24 to 36 in. depths in the pilot silos. Extending the storage period to 180 days in pilot silos had no effect on DM losses for sealed or delay sealed silages, but DM losses for unsealed silages continued to increase at all three depths. Placing a roof over the unsealed, farm-scale silo increased the silage DM …

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Progesterone Concentrations, Estrous Response, And Fertility In Beef Heifers After Estrous Synchronization Using Melengestrol Acetate® And Prostaglandin F2Α, C.W. Peters, Robert L. Larson, L.R. Corah Jan 1993

Progesterone Concentrations, Estrous Response, And Fertility In Beef Heifers After Estrous Synchronization Using Melengestrol Acetate® And Prostaglandin F2Α, C.W. Peters, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Melengestrol acetate (MGA®) and prostaglandin F2α(PG; Lutalyse®) were used to synchronize estrus in 757 yearling, virgin, beef heifers on six commercial ranches. Heifers were inseminated artificially (AI) 12 h after first detected estrus; those not detected in estrus were time-inseminated 72 h post-PG injection. Heifers detected in estrus by 72 h had higher AI and overall pregnancy rates than their counterparts not detected in estrus. Heifers with serum progesterone>1 ng/ml at PG administration were generally more fertile than those with progesterone<1 ng/ml. Of the heifers not detected in estrus and with low progesterone (<1 ng/ml), 24% still conceived to the timed insemination at 72 h, but only 73% became pregnant during the entire breeding period. Overall AI conception rate, based on estrous detection and timed insemination, was 49% and varied from 24% to 69% among the six ranches. Heifers exhibiting estrus and with elevated (>1 ng/ml) serum progesterone showed acceptable pregnancy rates (63% AI and 94% overall).

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Use Of Visual Appearance As An Indicator Of Degree Of Doneness In Ground Beef Patties, K.E. Warren, Melvin C. Hunt, M.A. Hague, Donald H. Kropf, Sally L. Stroda Jan 1993

Use Of Visual Appearance As An Indicator Of Degree Of Doneness In Ground Beef Patties, K.E. Warren, Melvin C. Hunt, M.A. Hague, Donald H. Kropf, Sally L. Stroda

Kansas Agricultural Experiment Station Research Reports

Outbreaks of food-borne illness have emphasized the need for proper cooking of ground beef patties. Because of difficulties in measuring internal temperature of ground beef patties, visual indicators usually are used to estimate degree of doneness. As internal temperature increases from 130 to 170 ÌŠF, the internal appearance is expected to change from very red to brown and juice color from red to clear. Based on ground beef patties from three sources, we found that internal color over-estimated internal temperature. Expressible juice decreased in redness as internal temperature increased but did not run clear even at temperatures over 160 ÌŠF. …

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Value-Added Beef Processing: Increasing The Value Of Beef Shanks Using Baadertm Processing Technology, R.E. Campbell, Melvin C. Hunt Jan 1993

Value-Added Beef Processing: Increasing The Value Of Beef Shanks Using Baadertm Processing Technology, R.E. Campbell, Melvin C. Hunt

Kansas Agricultural Experiment Station Research Reports

Using a BaaderTM desinewing machine on beef shanks can increase the value of a beef carcass by $1 to $5 by improving palatability and texture and reducing fat. By varying belt pressure and drum opening size and passing shanks twice through the desinewer, we obtained commercially acceptable yields. Maximum lean yield was 93% of the shank using 5 mm drum holes for both passes. With 3 mm drum holes, very lean produced on the first pass. Using desinewed lean and flaking the sinew with an Urschel Commitrol®, we produced low-fat (10%) ground beef patties. Patties from desinewed lean alone and/or …

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Protein Supplementation Of Ammoniated Wheat Straw: Effect On Performance Of Beef Cows, G.D. Fike, D.D. Simms, Robert T. Brandt Jr., R.C. Cochran, E.S. Vanzant, Gerry L. Kuhl Jan 1993

Protein Supplementation Of Ammoniated Wheat Straw: Effect On Performance Of Beef Cows, G.D. Fike, D.D. Simms, Robert T. Brandt Jr., R.C. Cochran, E.S. Vanzant, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Mature, crossbred beef cows (n = 87 in 1990-91, n = 84 in 1991-1992) were used to determine the effects of protein supplementation to cows fed ammoniated wheat straw during late gestation. Treatments included: 1) Control (C) - no supplement, 2) Low Protein (LP) - 4.5 lb of a 10% crude protein (CP) supplement, 3) Medium Protein (MP) - 4.5 lb of a 20% CP supplement, and 4) High Protein (HP) - 4.5 lb of a 30% CP supplement. Supplementation increased weight gain over controls (P<.01). HP cows gained more (P=.05) weight than LP-supplemented cows and tended (P=.11) to gain more weight than MP-supplemented cows. Supplementation also increased body condition score (BCS, 1-9 scale) over control cows (P<.01), but no difference was noted among supplemented groups. From the end of the feeding period until weaning, cows previously supplemented lost more weight (P<.01) than controls and exhibited little change in BCS, whereas controls increased BCS by .5 during the same period. Calving dates, calf birth weights, calf weaning weights, calf average daily gain, percent of cows cycling prior to breeding, and percent of cows pregnant did not differ between treatments. Consequently, although additional protein increased weight gain prior to parturition, this response did not impact economically important traits.

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Factors That Influence Number Of Bids On Finished Cattle, Ted C. Schroeder, J. Mintert, R. Jones Jan 1993

Factors That Influence Number Of Bids On Finished Cattle, Ted C. Schroeder, J. Mintert, R. Jones

Kansas Agricultural Experiment Station Research Reports

Previous research indicates that the number of bids received on pens of fed cattle has a positive influence on price. This study was undertaken to determine what factors influence the number of bids received on pens of cattle. The number of bids for fed cattle was investigated in 13 southwestern Kansas feedyards during May through November, 1990. Results indicated that cattle of desired weight, with higher estimated carcass yield and quality grade, in larger pen sizes, and sold in the middle of the week received the most bids. In addition, feedyard asking price relative to packer price offers also influenced …

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Economies Of Size For Farrow-To-Finish Hog Production In Kansas (1993), Michael R. Langemeier, Ted C. Schroeder Jan 1993

Economies Of Size For Farrow-To-Finish Hog Production In Kansas (1993), Michael R. Langemeier, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Economies of size measure the impact on average cost of production of increasing the size of operation. Data from 91 farrow-to-finish operations enrolled in the Kansas Farm Management Associations in 1992 were used to empirically estimate economies of size. Results indicate that average total cost and operation size are significantly correlated, and that average total cost declines as operations become larger. Results also indicate a substantial variability in costs of production between producers. In fact, costs of production between producers of a given size vary more than costs of production between operations of different sizes.; Swine Day, Manhattan, KS, November …

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Effects Of Wheat Gluten And Plasma Protein On Growth Performance And Digestibility Of Nutrients In Nursery Pigs (1993), J S. Pendergraft, C G. Mills, L L. Burnham, Robert H. Hines, Joe D. Hancock Jan 1993

Effects Of Wheat Gluten And Plasma Protein On Growth Performance And Digestibility Of Nutrients In Nursery Pigs (1993), J S. Pendergraft, C G. Mills, L L. Burnham, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

An experiment was conducted to determine the nutritional value of wheat gluten and spray-dried porcine plasma in diets for weanling pigs. For the experiment, 120 pigs (14 lb avg initial body wt) were used in a 35-d growth assay. Treatments fed from d 0 to 14 postweaning were: 1) a dried skim milk-dried whey-soybean mealbased control; and 2, 3, and 4) spray-dried wheat gluten, spray-dried porcine plasma, and a blend of the wheat gluten and porcine plasma used to replace dried skim milk on a protein basis. All pigs were fed the same corn-soybean meal-dried whey-based diet from d 14 …

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The Effects Of Dietary Soy Protein Source Fed To The Early-Weaned Pig On Subsequent Growth Performance (1993), K Q. Owen, B T. Richert, K G. Friesen, L J. Kats, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 1993

The Effects Of Dietary Soy Protein Source Fed To The Early-Weaned Pig On Subsequent Growth Performance (1993), K Q. Owen, B T. Richert, K G. Friesen, L J. Kats, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two hundred and ninety five pigs (initially 12.3 lb and 21 d of age) were used to determine the effect of different soy protein sources fed during phase I on subsequent growth performance. Dietary treatments were based on different soy protein sources added to the phase I (d 0 to 14 postweaning) diet. Pigs were fed one of five experimental treatments: 1) control diet (casein); 2) moist extruded soy protein concentrate (MESPC); 3) soybean meal (SBM); 4) soy protein concentrate (SPC); 5) moist extruded soy flour (MESF). The phase I diet contained 20% dried whey (DW), 7.5% spray dried porcine …

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Optimum Level Of Spray-Dried Porcine Plasma For Early-Weaned (10.5 D Of Age) Starter Pigs (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen Jan 1993

Optimum Level Of Spray-Dried Porcine Plasma For Early-Weaned (10.5 D Of Age) Starter Pigs (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

A total of 290 early-weaned pigs (initially 7.6 lb and 10.5 d of age) was used to evaluate various levels of spray-dried porcine plasma. Pigs were assigned to one of five experimental diets with either 5, 7.5, 10, 12.5, or 15% spray-dried porcine plasma replacing dried skim milk. Pigs were fed this diet for the first 14 days postweaning. Common diets were fed from d 14 to 42 postweaning in order to monitor subsequent performance. During the first phase (d 0 to 14 postweaning), linear improvements in average daily gain (ADG) and average daily feed intake (ADFI) occurred as the …

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Low Protein Corn Does Not Influence Finishing Pig Performance (1993), R E. Musser, C A. Kerr, B T. Richert, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach Jan 1993

Low Protein Corn Does Not Influence Finishing Pig Performance (1993), R E. Musser, C A. Kerr, B T. Richert, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

A total of 150 pigs was used to evaluate the effects of corn with different crude protein content on growth performance of finishing pigs. Our objective was to determine if low protein corn might result in poorer pig performance compared with pigs fed diets containing corn with a normal protein content. Control pigs were fed a diet containing corn with a crude protein content of 8.5% and formulated with soybean meal to 14.6% crude protein (.70% lysine). Pigs were also fed a diet with low crude protein corn (7.5%), which was substituted on an equal weight basis for normal corn …

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The Influence Of Threonine:Lysine Ratios On Growth Performance And On Plasma Urea Nitrogen In Growing-Finishing Pigs Fed From 85 To 240 Lb (1993), K G. Friesen, L J. Kats, K Q. Owen, B T. Richert, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach Jan 1993

The Influence Of Threonine:Lysine Ratios On Growth Performance And On Plasma Urea Nitrogen In Growing-Finishing Pigs Fed From 85 To 240 Lb (1993), K G. Friesen, L J. Kats, K Q. Owen, B T. Richert, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

Eighty crossbred pigs (initially 85.2 lb BW) were used in a 2 × 4 factorial arrangement to determine the influence of dietary threonine:lysine ratios on growth performance and plasma urea N in growing-finishing pigs. The experiment was conducted in three phases from 85.2 to 124.2, 139.1 to 203.1, and 204.9 to 241.1 lb, with pigs fed one of eight dietary treatments. Two levels of dietary lysine were fed (low vs high) and four levels of dietary threonine were fed within each lysine treatment (60, 65, 70, and 75% of dietary lysine). Dietary lysine decreased from 1.0% and .8% at 85.2 …

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Effect Of Methionine:Lysine Ratio On Growth Performance And Blood Metabolites Of Growing-Finishing Pigs (1993), L J. Kats, K G. Friesen, B T. Richert, K Q. Owen, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach Jan 1993

Effect Of Methionine:Lysine Ratio On Growth Performance And Blood Metabolites Of Growing-Finishing Pigs (1993), L J. Kats, K G. Friesen, B T. Richert, K Q. Owen, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

Eighty growing-finishing pigs (40 barrows and 40 gilts) were used in three consecutive growth assays to determine the optimum methionine:lysine ratio for pigs weighing from 48 to 107 lb, 120 to 179 lb, and 191 to 245 lb, respectively. Each growth assay was to be conducted for a 28-d period with a 14-d transition period between assays. Pigs were allotted by weight and placed in pens each containing one barrow and one gilt. Pigs were assigned to one of eight experimental treatments with five replicate pens per treatment. Pigs were fed diets containing either high lysine (1.0, .9, or .8%, …

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The Effect Of Increasing Dietary Methionine On Performance Of The Early-Weaned Pig (1993), K Q. Owen, L J. Kats, K G. Friesen, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach Jan 1993

The Effect Of Increasing Dietary Methionine On Performance Of The Early-Weaned Pig (1993), K Q. Owen, L J. Kats, K G. Friesen, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

A total of 216 pigs (initially 10.8 lb and 21 d of age) was used in a 35 d growth trial to determine the effect of increased dietary methionine on growth performance for the early-weaned pig when offered a porcine plasma-based diet. During d 0 to 21 postweaning, increasing methionine levels were obtained by adding DL-methionine to a common basal diet. The control diet was corn-soybean meal-based; contained 10% spray-dried porcine plasma (SDPP), 20% dried whey, 3% lactose, and 1.75% spray-dried blood meal (SDBM); and was formulated to contain 1.6% lysine and .28% methionine. DL-methionine replaced sucrose in the control …

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Reproductive Performance Of Yearling Beef Heifers After Estradiol Benzoate And Estrous Synchronization, R.P. Bolze, C.W. Peters Jan 1993

Reproductive Performance Of Yearling Beef Heifers After Estradiol Benzoate And Estrous Synchronization, R.P. Bolze, C.W. Peters

Kansas Agricultural Experiment Station Research Reports

Injectable estradiol (estradiol benzoate) was evaluated for its effect on the reproductive performance of yearling beef heifers whose estrous cycles were synchronized using the melengestrol acetate/prostaglandin F 2 α (MG- 2 A®/PG) system. Estradiol was injected 40 h after prostaglandin. Heifers were inseminated artificially (AI) 12 h after first observed heat during a 35-d AI period followed by 28 d of bull exposure. Estradiol had no effect on heat response or first-service pregnancy rate to AI during the synchronized period (5 d) and had no significant effect on overall AI pregnancy rate (35 d), cumulative pregnancy rate (63 d), or …

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Summer Annual Forages In South Central Kansas, William F. Heer, Dale A. Blasi, Dale L. Fjell Jan 1993

Summer Annual Forages In South Central Kansas, William F. Heer, Dale A. Blasi, Dale L. Fjell

Kansas Agricultural Experiment Station Research Reports

Six summer annuals and three forage sorghums were evaluated for forage yield and quality under south central Kansas dryland conditions. When cut in the late boot to early heading stage, all forage types (millet, sudan, sorghum-sudan, and forage sorghum) produced similar dry matter yields, with no consistent differences in nutritional quality. Allowing the forages to reach maturity prior to cutting increased total yield per acre but decreased the crude protein content. The millets were higher in protein at maturity than the sudans or forage sorghums. However, the forage sorghums produced the most mature forage, whereas common sudan yielded the least. …

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Evaluation Of 24 Corn Hybrids For Silage Agronomic Performance Under Both Irrigated And Dryland Conditions, R.N. Sonon, B.S. Dalke, D.L. Holthaus, D.R. Bonilla, L. Pfaff, John E. Boyer, B.E. Brent, K.K. Bolsen, Matthew A. Young Jan 1993

Evaluation Of 24 Corn Hybrids For Silage Agronomic Performance Under Both Irrigated And Dryland Conditions, R.N. Sonon, B.S. Dalke, D.L. Holthaus, D.R. Bonilla, L. Pfaff, John E. Boyer, B.E. Brent, K.K. Bolsen, Matthew A. Young

Kansas Agricultural Experiment Station Research Reports

In 1992, 24 corn hybrids were grown under both irrigated and dryland conditions and were harvested at 90% of the kernel milk line. Growing condition and hybrid significantly affected plant height and the number of days to the tasseling and silking stages. Most dryland hybrids had higher dry matter (DM) contents than irrigated hybrids, but all 24 hybrids had higher grain yields under irrigation. Growing condition and hybrid also significantly affected whole-plant DM and stover yields and percentages of cob and stover. The grain portion made the greatest contribution to the higher whole-plant silage yields for the irrigated hybrids compared …

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Agronomic Performance And Silage Quality Traits Of Forage Sorghum Hybrids In 1992, R.N. Sonon, B.S. Dalke, D.L. Holthaus, D.R. Bonilla, L. Pfaff, K.K. Bolsen, Matthew A. Young Jan 1993

Agronomic Performance And Silage Quality Traits Of Forage Sorghum Hybrids In 1992, R.N. Sonon, B.S. Dalke, D.L. Holthaus, D.R. Bonilla, L. Pfaff, K.K. Bolsen, Matthew A. Young

Kansas Agricultural Experiment Station Research Reports

Rainfall was much above and temperature much below normal during the 1992 growing season. Both whole-plant dry matter (DM) and grain yields were excellent for all 11 hybrids. The two short, mid-maturing, forage sorghums (Northrup King 300 and Golden Harvest H-45) had the highest silage and grain yields; the early-maturing (Cargill 200F) and male sterile (Golden Harvest H-1) forage sorghums and the grain sorghum (DeKalb DK 42Y) the lowest silage yields. A storm with high winds on October 7 and 8 caused severe lodging in all six mid- and late-maturing hybrids (earlier-maturing hybrids had already been harvested). The 10 forage …

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Effects Of Hybrid, Growing Condition, Storage Time, And Pioneer 1174® Silage Inoculant On Agronomic Performance And Nutritive Value Of Whole-Plant Corn And Grain Sorghum Silages, R. Suazo, R.N. Sonon, K.K. Bolsen Jan 1993

Effects Of Hybrid, Growing Condition, Storage Time, And Pioneer 1174® Silage Inoculant On Agronomic Performance And Nutritive Value Of Whole-Plant Corn And Grain Sorghum Silages, R. Suazo, R.N. Sonon, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

In 1989, two Pioneer corn hybrids, 3377 and 3389, were grown under irrigation and harvested at 80% milk line kernel maturity. Voluntary intakes and ADF digestibilities were similar for all hybrid, inoculant, and storage time combinations; however, DM digestibility was higher for 3377 silage than for 3389, and DM, CP, and NDF digestibilities were higher at the 50- than the 250-day storage time. The inoculant did not influence either voluntary intake or digestibility. In 1990, the same corn hybrids and DeKalb DK 42Y and Pioneer 8358 grain sorghum hybrids were grown under both irrigated and dryland conditions. Whole-plant DM contents …

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Effect Of Molybdenum/Sulfur-Induced Copper Deficiency Upon Enzyme Levels And Reproduction In Heifers, J.D. Arthington, L.R. Corah Jan 1993

Effect Of Molybdenum/Sulfur-Induced Copper Deficiency Upon Enzyme Levels And Reproduction In Heifers, J.D. Arthington, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

To evaluate the effects of molybdenum (Mo)- and sulfur (S)- induced copper (Cu) deficiency, 99 prepubertal heifers were allotted into two groups. Treated heifers (n = 72) were fed a grass hay naturally high in Mo (Mo = 8 ppm and Cu = 3.2 ppm). Sulfur was supplemented to achieve a dietary level of .3%. Control heifers (n = 27) received a grass hay with normal levels of Mo (Mo = .47 ppm and Cu = 1.5 ppm). Copper was supplemented to achieve a dietary level of 8 ppm. Diets were fed for a period of 163 d. Liver samples …

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Growth And Reproductive Characteristics In Heifers Fed Endophyte-Infected Tall Fescue And Oxytetracycline, C.W. Peters, F.K. Brazle, L.R. Corah Jan 1993

Growth And Reproductive Characteristics In Heifers Fed Endophyte-Infected Tall Fescue And Oxytetracycline, C.W. Peters, F.K. Brazle, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Heifers developed on high-endophyte, tall fescue gained half as much weight (56 vs 117 lb; P<.01) and had a lower 35-day pregnancy rate (15 vs 58%; P<.01) compared to heifers fed low endophyte, tall fescue. Based on progesterone serum concentrations and visual determination of estrus, the proportion of heifers that had attained puberty by the start of the breeding season tended (P=.11) to be greater when fed oxytetracycline (55 vs 68%).

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Effect Of Density Of Steam Flaked Milo On Animal Performance, Mill Production Rate, And Subacute Acidosis, Robert T. Brandt Jr., A.S. Freeman, T.P. Eck, Christopher D. Reinhardt, Keith C. Behnke Jan 1993

Effect Of Density Of Steam Flaked Milo On Animal Performance, Mill Production Rate, And Subacute Acidosis, Robert T. Brandt Jr., A.S. Freeman, T.P. Eck, Christopher D. Reinhardt, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

In Trial 1, 336 yearling steers (755 lb) were fed diets containing milo flaked to 22 (L), 25 (M), or 28 (H) lb/bu. The steers fed L consumed 3.2% less dry matter than cattle fed H (P<.05) and had 6.9% lower gains (P<.05). Feed efficiency tended (P=.15) to favor cattle fed H. The H milo was flaked 27% faster than M and 67% faster than L (P<.0001), resulting in lower production cost for the heavy flakes. In Trial 2, six ruminally cannulated steers were fed the same diets used in Trial 1 in a replicated 3x3 Latin square. After adaptation to the respective diets, the cattle were fasted and then overfed to simulate a drastic intake fluctuation. The L diet was fermented more rapidly than the H diet, resulting in greater ruminal pH depression (P<.10) following overconsumption. Under the conditions of this experiment, flaking milo more intensively than 28 lb/bu (58.7% starch gelatinization) resulted in decreased consumption, lower mill efficiency, and increased propensity for acidosis in finishing steers.

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Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets On Performance Of Finishing Steers, B.J. Healy, Robert T. Brandt Jr., S.M. Gramlich Jan 1993

Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets On Performance Of Finishing Steers, B.J. Healy, Robert T. Brandt Jr., S.M. Gramlich

Kansas Agricultural Experiment Station Research Reports

One hundred forty-four crossbred steers (850 lb) were used to evaluate the effects of physical form and level of average (15% CP) quality alfalfa on performance and carcass traits. Alfalfa hay had been harvested from a common field and alternate bales were either chopped (3 to 4 in. length) or ground and pelleted (3/8 in. pellet). No interactions between alfalfa form and level were detected. Daily gain, daily intake, feed efficiency, and carcass traits were similar for steers fed both alfalfa forms. Steers fed 10% alfalfa consumed 7.2% more feed (P<.03) than those fed 5%. Steers fed 5% alfalfa had marginally improved feed efficiencies, whereas those fed 10% had somewhat greater daily gains. Carcass traits were not affected by level of alfalfa. The incidence and severity of liver abscesses were greater (P<.05) for steers fed 5% alfalfa, indicative of a higher degree of acidosis than for steers fed 10% alfalfa.

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Ultrasound-Measured Ribeye Area Epd For Brangus Cattle, R.R. Schalles, J.B. Glaze, R. Mallen-Spinzi, K.M. Andries, C.J. Rost, M.Z. Johnson, W. Olson, Michael E. Dikeman Jan 1993

Ultrasound-Measured Ribeye Area Epd For Brangus Cattle, R.R. Schalles, J.B. Glaze, R. Mallen-Spinzi, K.M. Andries, C.J. Rost, M.Z. Johnson, W. Olson, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Ultrasound-measured ribeye area (REA) expected progeny differences (EPD) were calculated for 2974 Brangus cattle. Carcass data were collected from 168 steer progeny sired by eight bulls with ultrasound-measured ribeye area EPDs. A heritability estimate of .40 for ultrasound-measured REA and a 2.82 sq. in. range in genetic differences in ultrasound- measured REAs in this population indicate considerable opportunity to make genetic change in this trait. The regression of progeny average carcass REA on the sire's ultrasound measured ribeye area EPD indicated that for each square inch change in the EPD, the carcass REA of their progeny changed by .69 sq. …

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Relationship Between Expected Progeny Differences (Epd) And Performance Of Angus And Simmental Bulls In Central Bull Tests, D.D. Simms Jan 1993

Relationship Between Expected Progeny Differences (Epd) And Performance Of Angus And Simmental Bulls In Central Bull Tests, D.D. Simms

Kansas Agricultural Experiment Station Research Reports

The performance of bulls (n = 656 for Angus and n = 1343 for Simmental) at the Beloit and Potwin bulls tests from 1989 to 1992 were compared to their expected progeny differences (EPDs). In general, correlations between on-test ADG and weaning and yearling EPD were low for both breeds. However, the correlations between actual yearling weight and yearling EPD was moderate for Angus. Differences in actual yearling weight were 2.80 and 1.71 pounds (for Angus and Simmental, respectively) for each pound of difference in yearling weight EPD, which is close to the 2.0 pound difference expected. Thus, although the …

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Effect Of Diet Energy Content And Level Of Restriction On Performance, Nutrient Digestibility, And Puberty In Replacement Beef Heifers, Robert T. Brandt Jr., Ronald V. Pope, Jeffrey S. Stevenson Jan 1993

Effect Of Diet Energy Content And Level Of Restriction On Performance, Nutrient Digestibility, And Puberty In Replacement Beef Heifers, Robert T. Brandt Jr., Ronald V. Pope, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Eighty Angus x Hereford crossbred weanling heifers (548 lb) were used in a 2x2 factorial experiment to evaluate dietary energy concentration (NEg .51 vs .61 Mcal/lb) and intake restriction (to produce 1.25 and 2.0 lb/d gain). Intake of the diets (corn - corn silage based; 14% CP) was adjusted every 2 weeks. Steer counterparts to the heifers were used in a 2x3 factorially arranged digestion experiment using the same treatments with an additional ad libitum intake level. There were no interactions between energy content and level of restriction. Heifers fed the higher energy diet maintained equal daily gain on 9.7% …

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Factors Influencing The Price Paid For Bulls At Central Test Stations In Kansas From 1988-1992, D.D. Simms, J.R. Schwenke Jan 1993

Factors Influencing The Price Paid For Bulls At Central Test Stations In Kansas From 1988-1992, D.D. Simms, J.R. Schwenke

Kansas Agricultural Experiment Station Research Reports

Results of 13 sales of Angus (n=185) and Simmental (n=544) bulls at central bull tests in Kansas from 1988 through 1992 were analyzed to determine the relationship between performance and the price received. The Kansas bull test index (based 50% on weight per- day-of-age and 50% on test ADG) was the most significant single factor determining price in both Angus and Simmental bulls. Birth weight, final weight, and frame score were other major contributors to price in Angus bulls, whereas weaning weight ratio, birth weight, and being polled were important in Simmental bulls. Expected progeny differences made small but significant …

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Gastrointestinal Thiaminase Vs. Ration Changes, H.W. Soita, B.E. Brent Jan 1993

Gastrointestinal Thiaminase Vs. Ration Changes, H.W. Soita, B.E. Brent

Kansas Agricultural Experiment Station Research Reports

High levels of the thiamin-destroying enzyme, thiaminase I, were found in the feces of 3 of 50 apparently healthy dairy cows. All high fecal thiaminase I levels returned to normal within 3 weeks, indicating that thiaminase I occurs in "spikes" rather than continuing at elevated levels. All cows sampled had some thiaminase I, but the upper end of the "normal" range in feces was about 3.5 μmol/min/l. Thiaminase I levels were higher in the first than in subsequent lactations. When spikes in thiaminase I activity occurred, they were concentrated within about 20 days of calving and of the associated change …

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