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Payout Characteristics Of Anabolic Agents From Synovex®, Finaplix®, And Revalor® Implants In Finishing Yearling Steers, P.S. Hickman, Robert T. Brandt Jr., D.M. Henricks, J. Ernest Minton, Jeffrey S. Stevenson
Payout Characteristics Of Anabolic Agents From Synovex®, Finaplix®, And Revalor® Implants In Finishing Yearling Steers, P.S. Hickman, Robert T. Brandt Jr., D.M. Henricks, J. Ernest Minton, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Forty, individually fed, yearling steers (750 lbs) were used to measure payout characteristics of different trenbolone acetate-containing implants and to correlate those characteristics to growth response. Treatments were 1) control, 2) Synovex-S®, 3) Finaplix-S®, 4) Synovex® plus Finaplix, and 5) Revalor®. Steers were fed a 12% crude protein, corn-based, finishing diet for 112 days. Compared to Revalor, which had a fairly constant payout over time, the combination of Synovex plus Finaplix resulted in higher blood levels of estradiol and trenbolone acetate (TBA) up to 56 days, followed by a relatively rapid decline to 112 days. Despite elevated levels of TBA …
Effect Of Rumen-Escape Protein Level On Feedlot Performance And Carcass Traits Of Implanted Vs Nonimplanted Yearling Steers, Robert T. Brandt Jr., Christopher D. Reinhardt
Effect Of Rumen-Escape Protein Level On Feedlot Performance And Carcass Traits Of Implanted Vs Nonimplanted Yearling Steers, Robert T. Brandt Jr., Christopher D. Reinhardt
Kansas Agricultural Experiment Station Research Reports
One hundred eighty yearling steers (743 lb) were blocked by weight; implanted with Synovex® (S), Synovex plus Finaplix® (SF), or not implanted (C); and fed diets containing 11.75% (L), 13.0% (M), or 14.25% (H) crude protein with all supplemental protein above 11.75% being supplied by corn gluten meal and blood meal in a 50:50 ratio (crude protein basis). An addition al protein level fed to S and SF implanted cattle was H for the first 70 days on feed and L thereafter (H-L). Animals were reimplanted on day 70. Steers treated with SF gained faster and more efficiently than non-implanted …
Effects Of Alfalfa Form And Level On Subacute Acidosis, B.J. Healy, Robert T. Brandt Jr., S.M. Gramlich
Effects Of Alfalfa Form And Level On Subacute Acidosis, B.J. Healy, Robert T. Brandt Jr., S.M. Gramlich
Kansas Agricultural Experiment Station Research Reports
Eight ruminally cannulated crossbred steers (1225 lb) were used to investigate the effects of 5 vs 10% alfalfa hay or pellets on rumen characteristics during subacute acidosis. Alfalfa hay was obtained from one source, and alternate bales were either chopped (3- to 4-inch length) or ground and pelleted (3/8-inch pellet). Intake during the recovery period after feed challenges tended (P=.12) to be greater for diets containing 10% alfalfa. Duration of rumen pH below 5.5 was less for diets with chopped vs pelleted (P<.10) or 10 vs 5% (P<.05) alfalfa. Total volatile fatty acid (VFA) concentrations during the challenge ph ase and for the overall experimental period were increased (P<.05) when steers were fed 5 vs 10% alfalfa diets but were similar during the baseline and recovery periods. The higher pH and lower VFA concentration resulting from feeding 10% alfalfa diets suggest that steers fed a moderate amount of roughage can withstand greater fluctuations in intake without developing acidosis.
Roughage Levels And Comparison Of Mixed Rations Vs Self-Feeders In Whole Shelled Corn Finishing Programs, C.T. Milton, Robert T. Brandt Jr., S.A. Shuey
Roughage Levels And Comparison Of Mixed Rations Vs Self-Feeders In Whole Shelled Corn Finishing Programs, C.T. Milton, Robert T. Brandt Jr., S.A. Shuey
Kansas Agricultural Experiment Station Research Reports
Two trials were conducted to evaluate roughage levels in whole shelled-corn finishing diets and to compare use of self-feeders to a total mixed ration in a whole corn program. In trial 1, steers were fed whole corn diets alone or with 4 or 8% roughage or a rolled corn diet with 8% roughage. Increasing the roughage level increased dry matter in take, feed required per unit of gain, and carcass weight and finish, and reduced the incidence of liver abscesses. Despite better feed efficiency and lower costs of gain, reducing the dietary roughage level reduced profitability because of lighter slaughter …
Roughage Level And Corn Processing In Finishing Diets: Subacute Acidosis, S.A. Shuey, Robert T. Brandt Jr., S.M. Gramlich, C.T. Milton
Roughage Level And Corn Processing In Finishing Diets: Subacute Acidosis, S.A. Shuey, Robert T. Brandt Jr., S.M. Gramlich, C.T. Milton
Kansas Agricultural Experiment Station Research Reports
Roughage level and method of corn processing were evaluated for the propensity to cause subacute acidosis in a controlled acidosis challenge model. Four ruminally fistulated steers were adapted to a high grain diet, randomly allocated within a 4 x 4 Latin square, and fed a corn-based finishing ration at 2% of BW/day (dry basis) in two equal feedings. Chopped alfalfa hay was used as the roughage source and added at 8% of the diet dry matter or not added. Corn was fed either whole (WSC) or dry rolled (DRC). Roughage level and grain processing had no effect on postchallenge molar …
Effect Of Stage Of Growth And Sampling Procedure On The Trace Mineral Content Of Kansas Native Grass, J.D. Arthington, L.R. Corah, S.D. Utter
Effect Of Stage Of Growth And Sampling Procedure On The Trace Mineral Content Of Kansas Native Grass, J.D. Arthington, L.R. Corah, S.D. Utter
Kansas Agricultural Experiment Station Research Reports
To determine the trace mineral content of Kansas native grasses, samples were collected from four locations of tall or intermediate grasses and four locations of short grasses. Copper (Cu) and zinc (Zn) levels tended to be lower during dormancy than in the growing season; however, manganese (Mg) and iron (Fe) levels were essentially the same throughout the year. In terms of meeting the dietary requirements of grazing cattle, Cu was adequate in June but marginal in February, whereas Zn was marginal to deficient at both collection times. In addition, the impact of grazing selectivity on the validity of trace mineral …
Effects Of Supplemental Trace Minerals And Prevaccination On Stressed Calves, S.A. Lindell, Robert T. Brandt Jr., Gerald L. Stokka, S.M. Gramlich, C.T. Milton
Effects Of Supplemental Trace Minerals And Prevaccination On Stressed Calves, S.A. Lindell, Robert T. Brandt Jr., Gerald L. Stokka, S.M. Gramlich, C.T. Milton
Kansas Agricultural Experiment Station Research Reports
Two trials were conducted to evaluate the effect of high dietary levels of trace minerals on performance and health of stressed calves. In trial 1, 221 Brahman crossbred steers (674 l b, 1/8 to 1/4 Brahman) were used to evaluate the effect of copper (Cu) and zinc (Zn) supplementation on performance and immune response. The steers were shipped from northern Texas to the KSU Beef Research Un it with an 18-hour transit time. Receiving diets were formulated to contain 1) NRC-recommended levels of Cu and Zn or 2) 4 times re commended levels. In trial 2, 112 Angus cross steers …
Effect Of Morning Vs Evening Feeding Of Limit-Fed Holsteins During Summer Months, Robert T. Brandt Jr., Christopher D. Reinhardt
Effect Of Morning Vs Evening Feeding Of Limit-Fed Holsteins During Summer Months, Robert T. Brandt Jr., Christopher D. Reinhardt
Kansas Agricultural Experiment Station Research Reports
Thirty-eight Holstein steers (avg 339 lb) were grouped into four weight blocks, with two pens per block. Within each block, cattle in one pen were fed at 8:00 a.m. and those in the other at 8:00 p.m. All cattle were limit-fed to achieve a programmed rat e of gain of 2.2 lbs/d using NRC net energy equations. The trial lasted from July 13 through September 6, 1993. With the same quantity of feed, cattle fed in the evening gained 18% faster than cattle fed in the morning (P<.02) resulting in better feed efficiency for the evening-fed cattle (P<.06). Average high temperature for the 56-day period was 88F, average low temperature was 69 ÌŠF, average relative humidity was 73%, and average wind speed was 1.8 mph. Feed tended to be consumed within a 3-hour period, regardless of time of feeding. Because the effective ambient temperature frequently rose above the upper critical temperature for cattle (77 ÌŠF), animals needed to expend energy to dissipate excess heat. These results indicate that cattle limit-fed during the summer may utilize metabolizable energy more efficiently if allowed to ferment the bulk of their feed during the cooler hours of the evening.
The Effect Of Mass Treatment With Micotil® At Arrival On The Health And Performance Of Long-Hauled Calves, F.K. Brazle
The Effect Of Mass Treatment With Micotil® At Arrival On The Health And Performance Of Long-Hauled Calves, F.K. Brazle
Kansas Agricultural Experiment Station Research Reports
Long-hauled calves (n=170 were either mass-medicated with Micotil® or served as controls. Micotil reduced mortality (1.2 vs 8.1%) and morbidity (59.7 vs 75.5%), but it did not improve ADG.
The Effect Of Copper Sulfate And Zinc Oxide In A Drench On The Gain And Health Of Newly Arrived Calves, F.K. Brazle, Gerald L. Stokka
The Effect Of Copper Sulfate And Zinc Oxide In A Drench On The Gain And Health Of Newly Arrived Calves, F.K. Brazle, Gerald L. Stokka
Kansas Agricultural Experiment Station Research Reports
One hundred and fifty-four, newly arrived, bull calves averaging 295 lb were either drenched with a copper-zinc (Cu-Zn) solution or water at arrival. The Cu-Zn drench did not affect gains during a 56-day trial. Additionally, no differences occurred in morbidity or the number of antibiotic treatments required per animal.
The Effect Of Fourplex® On Gain And Health Of Newly Arrived Calves, F.K. Brazle, Gerald L. Stokka
The Effect Of Fourplex® On Gain And Health Of Newly Arrived Calves, F.K. Brazle, Gerald L. Stokka
Kansas Agricultural Experiment Station Research Reports
Two trials were conducted to evaluate the effects of Fourplex®, a trace mineral supplement, on long-hauled stocker calves. In each trial, Fourplex was added to the ration of lightweight, long-hauled calves in four pens, while calves in another four pens served as controls. Additionally, every other calf that became sick, regardless of feed treatment, was drenched with a solution of Fourplex in Trial I and a Cu, Zn, Mn+Co solution in Trial II. Fourplex in the feed did not improve ADG, reduce morbidity, or reduce the number o f treatments required per sick animal. In Trial II , Fourplex-fed calves …
The Effect Of Protected Lysine-Methionine On Gain And Health Of Newly Arrived Calves, F.K. Brazle, Gerald L. Stokka
The Effect Of Protected Lysine-Methionine On Gain And Health Of Newly Arrived Calves, F.K. Brazle, Gerald L. Stokka
Kansas Agricultural Experiment Station Research Reports
Long-hauled calves averaging 293 lb were allotted to groups fed with or without protected lysine-methionine (Smartamine ML®). Protected lysine-methionin e did not improve ADG in the first 28 days but did improve ADG from 29 to 56 days. It also reduced morbidity (16.1 vs 34.2%) from day 29 to 56. Based on this research, the response of long-hauled calves to protected lysine-methionine in the diet appears to occur after they have recovered from the stress of shipment.
The Effect Of Feeding Different Levels Of Aureomycin® In A Mineral Mixture To Stocker Cattle Grazing Native Grass, F.K. Brazle
The Effect Of Feeding Different Levels Of Aureomycin® In A Mineral Mixture To Stocker Cattle Grazing Native Grass, F.K. Brazle
Kansas Agricultural Experiment Station Research Reports
Two hundred and forty-three mixed breed steers were allotted to four treatments with two pastures per treatment. Treatments consisted of a free-choice mineral supplement alone or with Aureomycin® added to provide 150, 300, or 450 mg/hd/day. Gain was similar for all four treatments. The percentage of cattle with eye problems was reduced in pastures where 150 and 450 mg of Aureomycin were consumed daily; however, the incidence in the 300 mg/hd/day group was as high as in the control group.
Effect Of Lasalocid And Length Of Morning Grazing On Weight And Shrink Of Steers Grazing Bromegrass Pastures, K.P. Coffey, F.K. Brazle, Joseph L. Moyer
Effect Of Lasalocid And Length Of Morning Grazing On Weight And Shrink Of Steers Grazing Bromegrass Pastures, K.P. Coffey, F.K. Brazle, Joseph L. Moyer
Kansas Agricultural Experiment Station Research Reports
A total of 72 mixed breed steer s from two sources was used in an experiment to determine the effect of lasalocid and length of morning grazing prior to weighing on weight and shrink of steers grazing smooth bromegrass pastures. Steers were divided into eight groups and weighed at either 6, 7, 8, or 9 a.m. on 4 separate days. Half of the steers received a control mineral mixture and half received a mineral mixture containing lasalocid. Weights of purchased steers having an excitable disposition were not affected (P>.10) by length of morning grazing prior to weighing. However, weights …
Commercial Cattle Producers: Bull Selection Criteria, D.D. Simms, J.M. Geske, R.P. Bolze
Commercial Cattle Producers: Bull Selection Criteria, D.D. Simms, J.M. Geske, R.P. Bolze
Kansas Agricultural Experiment Station Research Reports
A survey of 312 commercial cattle producers was conducted to determine the relative importance of selection criteria used in buying bulls. Calving ease was a major consideration of a high percentage of producers, and individual performance was being emphasized more than expected progeny differences (EPDs). Only 23% of the producers included EPDs in their first three selection criteria. Visual appraisal focused on structural soundness, length, and muscling.
Efficacy Of Using Parasitic Wasps To Control Stable Flies In Kansas Feedlots, G.L. Greene, J.E. Cilek
Efficacy Of Using Parasitic Wasps To Control Stable Flies In Kansas Feedlots, G.L. Greene, J.E. Cilek
Kansas Agricultural Experiment Station Research Reports
Release of parasitic wasps has resulted in stable fly reductions averaging 28, 42 and 38% for 1991, 1992, and 1993, respectively, with considerable variation from feedlot to feedlot. Costs for parasites plus sampling averaged $.23, $.32 and $.26 per animal during 1991, 1992, and 1993, respectively. Because stable flies are estimated to cause losses of $5.00 to $30.00 per animal, these costs are very reasonable.
Location Effects On Forage Production And Quality Among Selected Pioneer Corn Hybrids, D.G. Tiemann, K.K. Bolsen, D.H. Clark, W. Kezar
Location Effects On Forage Production And Quality Among Selected Pioneer Corn Hybrids, D.G. Tiemann, K.K. Bolsen, D.H. Clark, W. Kezar
Kansas Agricultural Experiment Station Research Reports
Six Pioneer corn hybrids were grown in Kansas and four of the six hybrids within three locations in Utah. The Utah hybrids were harvested between the one-quarter and one-half milk line stages of kernel maturity, whereas the Kansas hybrids were harvested at approximately 90% of kernel maturity. Location had a significant effect on the agronomic characteristics and chemical composition of the hybrids. Whole-plant dry matter (DM) and digestible DM yield, grain yield, and percent grain were higher in the Kansas-grown corn. The greater yield and proportion of grain were results of the excellent growth conditions i n 1992 and their …
In Vitro Dry Matter Digestibility Of Selected Forage Sorghum Silages As Influenced By Plant Parts, R.N. Jr. Sonon, K.K. Bolsen, B.E. Brent, L.H. Harbers, John E. Boyer
In Vitro Dry Matter Digestibility Of Selected Forage Sorghum Silages As Influenced By Plant Parts, R.N. Jr. Sonon, K.K. Bolsen, B.E. Brent, L.H. Harbers, John E. Boyer
Kansas Agricultural Experiment Station Research Reports
Eleven forage sorghum cultivars and one grain sorghum hybrid were used to determine the effect of individual plant parts on in vitro dry matter digestibility (IVDMD) of sorghum silage. IVDMD was highest for the head and lowest for the leaf sheath. When head and leaf blade parts were added to whole-plant material, IVDMD increased. When leaf sheath and stalk parts were added, IVDMD decreased, with the greatest decrease for leaf sheath. These results are consistent with an earlier study in our laboratory.
Agronomic Traits And Growing Cattle Performance For Whole-Plant Corn And Forage And Grain Sorghum Silages, B.S. Dalke, R.N. Jr. Sonon, D.L. Holthaus, L. Pfaff, K.K. Bolsen, Matthew A. Young
Agronomic Traits And Growing Cattle Performance For Whole-Plant Corn And Forage And Grain Sorghum Silages, B.S. Dalke, R.N. Jr. Sonon, D.L. Holthaus, L. Pfaff, K.K. Bolsen, Matthew A. Young
Kansas Agricultural Experiment Station Research Reports
Agronomic and cattle performance traits were measured for the following silages produced in 1992: irrigated Pioneer 3377 corn, ensiled with or without Biotal® silage inoculant; DeKalb 42Y grain sorghum; and Cargill 200F, Pioneer 947, DeKalb FS-5 and FS-25E, and Northrup King (NK) 300 forage sorghums. All sorghums were grown under dryland conditions. The irrigated corn had the highest whole-plant dry matter (DM) and grain yields, and NK 300 and DeKalb FS-5 had the highest whole-plant DM yields among the sorghums. NK 300 also had the highest grain yield among the sorghums; DeKalb FS-5 and FS-25E had the lowest. Steers fed …
Dormant, Tallgrass-Prairie Forage: Influence Of Ruminal Degradable Protein On Intake By Beef Cows And Fermentation Characteristics, H.H. Koster, R.C. Cochran, E.S. Vanzant, G. St Jean, Evan C. Titgemeyer
Dormant, Tallgrass-Prairie Forage: Influence Of Ruminal Degradable Protein On Intake By Beef Cows And Fermentation Characteristics, H.H. Koster, R.C. Cochran, E.S. Vanzant, G. St Jean, Evan C. Titgemeyer
Kansas Agricultural Experiment Station Research Reports
Five ruminally and duodenally fistulated Angus x Hereford cows were fed dormant tallgrass-prairie forage ad libitum to monitor intake and fermentation responses associated with providing increasing amounts of supplemental ruminal degradable protein (RDP). The RDP was provided from sodium caseinate and infused intraruminally immediately before feeding forage. Levels of RDP were 0, 180, 360, 540, and 720 g/d. Maximal intake of dormant, tallgrass-prairie forage occurred with provision of 540 g RDP/d. Ruminal dry matter fill declined with increasing level of RDP infusion. Increasing supplmentation of RDP generally improved ruminal fermentation characteristics.
Effects Of Sorghum Hybrid And Grain Supplementation On The Utilization Of Silage-Based Rations For Growing Cattle, B.S. Dalke, K.K. Bolsen, R.N. Jr. Sonon, D.L. Holthaus, Matthew A. Young
Effects Of Sorghum Hybrid And Grain Supplementation On The Utilization Of Silage-Based Rations For Growing Cattle, B.S. Dalke, K.K. Bolsen, R.N. Jr. Sonon, D.L. Holthaus, Matthew A. Young
Kansas Agricultural Experiment Station Research Reports
Three whole-plant sorghum silages, each with or without 25% added rolled grain sorghum were fed to six medium-framed, ruminally cannulated steers in a 6 x 6 Latin square design. The grain sorghum silage rations (DeKalb 42Y) had the highest DM, OM, and ADF digestibilities; the late-season forage sorghum silage rations (DeKalb FS 25E), the lowest. Digestibility of NDF tended to be highest for the grain sorghum silage, but starch digestibilities were not affected by sorghum hybrid. Ruminal ammonia, acetate, propionate, butyrate, and total VFA concentrations were highest for the grain sorghum silage rations. Grain supplementation increased DM and OM digestibilities …
Level Of Urea In High Grain Diets: Finishing Steer Performance, C.T. Milton, Robert T. Brandt Jr.
Level Of Urea In High Grain Diets: Finishing Steer Performance, C.T. Milton, Robert T. Brandt Jr.
Kansas Agricultural Experiment Station Research Reports
Eighty-eight medium-framed crossbred steers (731 lb) were used to identify the optimal level of urea in finishing diets for growth and carcass traits. Diets contained no urea or .5, 1.0, or 1.5% urea (dry matter basis) and no other supplemental protein. Feed efficiency and gain were improved substantially by the first increment of urea (.5%), with little or no improvement from subsequent urea additions. Pooled across level, urea improved feed efficiency by 5.6% and gain by 8.9%, whereas dry matter intake declined 3.3% compared to controls. Regression analysis indicated that the optimal level of urea for gain and feed efficiency …
Level Of Urea In High Grain Diets: Nutrient Digestibility, Microbial Protein Production, And Rumen Metabolism, C.T. Milton, Robert T. Brandt Jr.
Level Of Urea In High Grain Diets: Nutrient Digestibility, Microbial Protein Production, And Rumen Metabolism, C.T. Milton, Robert T. Brandt Jr.
Kansas Agricultural Experiment Station Research Reports
Four ruminally and duodenally fistulated steers (1228 lb) were used in a 4 x 4 Latin square design to evaluate the effects of dietary urea level on nutrient digestion, microbial protein production, and rumen metabolism of steers fed a rolled corn diet without urea or with .5, 1.0, or 1.5% urea (dry matter basis) and no other supplemental protein. Rumen digestibilities increased 33% for organic matter and 25% for starch with the first increment (.5%) of urea, but little or no improvement occurred with subsequent urea additions. Apparent rumen nitrogen digestibility decreased linearly, whereas total tract and true ruminal nitrogen …
Source And Level Of Crude Protein For Implanted Finishing Steers, C.T. Milton, Robert T. Brandt Jr.
Source And Level Of Crude Protein For Implanted Finishing Steers, C.T. Milton, Robert T. Brandt Jr.
Kansas Agricultural Experiment Station Research Reports
One hundred medium-framed, crossbred steers (738 lb) were used to compare non-protein nitrogen to natural protein supplementation of finishing diets for implanted steers. Diets were formulate d to contain 11.5 or 13.5% crude protein and were supplemented with either urea or soybean meal. A fifth treatment of cottonseed meal supplementation (13.5% dietary crude protein) was added to evaluate differences between natural sources of rumen degradable protein. Steers were implanted with Revalor® and fed for 132 days. During the first 70 days, daily gain and feed efficiency were improved 8.8 and 6.1%, respectively, for steers supplemented with soybean meal vs urea. …
D- Vs L-Methionine Utilization By Growing Steers, C.G. Campbell, G. St. Jean, Evan C. Titgemeyer
D- Vs L-Methionine Utilization By Growing Steers, C.G. Campbell, G. St. Jean, Evan C. Titgemeyer
Kansas Agricultural Experiment Station Research Reports
Increasing the amino acid supply to the small intestine of growing cattle can increase performance, if specific amino acids are limiting. Although this can be accomplished by feeding rumen undegradable protein, a more economical approach may be supplementing only those amino acids that actually limit performance, but in a form that will bypass the rumen. Methionine (MET) is thought to be a limiting amino acid for growing cattle. DL-MET, a 50 :50 mixture of natural methionine (L-MET) and the unnatural optical isomer (D-MET) is used widely in monogastric rations. Ruminally protected DL-methionine is also available for cattle; however, little information …
Evaluation Of The Potential Of Supplements To Substitute For Range Forage, S.D. Stafford, R.C. Cochran, E.S. Vanzant, J.O. Fritz
Evaluation Of The Potential Of Supplements To Substitute For Range Forage, S.D. Stafford, R.C. Cochran, E.S. Vanzant, J.O. Fritz
Kansas Agricultural Experiment Station Research Reports
Thirteen, ruminally fistulated, Angus x Hereford, yearling steers were used to evaluate the effect of feeding different types and amounts of supplements on t h e likelihood of observing a substitution of supplement for range forage. Steers had ad libitum access to low-quality range forage and were fed a supplement comprised of sorghum grain (SG) and soybean meal (SBM ) that contained 18% CP (SG/SBM 18%), a SG/SBM supplement that contained 36% CP (SG/SBM 36%), long-stem alfalfa hay (18% CP), or alfalfa-pellets (18% CP) in amounts that provided .05, .10, and .15 % BW o f CP/day. In general, supplementation …
Effect Of Grain Type In Supplements And Supplementation Frequency On The Performance Of Beef Cows Grazing Winter Range, R.C. Cochran, J.L. Beaty, E.S. Vanzant
Effect Of Grain Type In Supplements And Supplementation Frequency On The Performance Of Beef Cows Grazing Winter Range, R.C. Cochran, J.L. Beaty, E.S. Vanzant
Kansas Agricultural Experiment Station Research Reports
One hundred twenty, pregnant, Angus x Hereford cows (1111 lb) grazing dormant bluestem range were used to evaluate whether the effect of altered frequency of supplementation on cow performance depended on the grain type in the supplement. Two supplementation frequencies (daily and three times weekly) and two grain types in the supplements (sorghum grain or corn) were evaluated. Both supplements contained 21% CP and were fed to provide 32.6 lb DM/week. Interactions were not significant. Winter weight loss through calving was greater (P#.02) for the cows supplemented three times weekly, although the magnitude of the effect was not large. Use …
Influence Of Dietary Energy Levels On Reproductive Function And Fertility In Yearling Beef Heifers, S.D. Utter, L.R. Corah
Influence Of Dietary Energy Levels On Reproductive Function And Fertility In Yearling Beef Heifers, S.D. Utter, L.R. Corah
Kansas Agricultural Experiment Station Research Reports
Fifty-nine heifers were allotted to be fed at two different energy levels. One group gained 1.77 lb/hd/day, and the other 1.25 lb/hd/day. Estrus was synchronized with the MGA/prostaglandin system. After MGA removal, ovarian development was monitored daily by ultrasound (10 per group) until estrous was detected following the PGF injection. Heifers were inseminated artificially based on estrus behavior. Faster gaining heifers had higher final body condition scores and greater changes in body condition score. The high energy diet caused a slight (P=.11) decrease in AI pregnancy rate for purebred heifers.
Relationships Between Lignin Content And Fermentability Of Intact And Chemically Treated Big Bluestem Fiber, R.C. Cochran, G. Towne, Evan C. Titgemeyer, K. C. Olson
Relationships Between Lignin Content And Fermentability Of Intact And Chemically Treated Big Bluestem Fiber, R.C. Cochran, G. Towne, Evan C. Titgemeyer, K. C. Olson
Kansas Agricultural Experiment Station Research Reports
An accurate assessment of forage quality is required to allow prediction of animal performance. One of the most commonly used methods of forage evaluation is to measure lignin content, with more heavily lignified materials being considered less digestible. Two measures of lignin, acid detergent lignin (ADL) and acetyl bromide lignin (ABL), were assessed with regard to their ability to predict forage digestibility. Big bluestem forage samples were collected from three ungrazed, annually burned pastures at 38, 58, and 97 days postburn. These times were selected to represent a broad range of forage quality. Cell wall material was treated chemically by: …
Continuous-Culture Fermentation As A Tool For Forage Evaluation, E.S. Vanzant, R.C. Cochran, S. Stafford, G. St Jean, K. C. Olson
Continuous-Culture Fermentation As A Tool For Forage Evaluation, E.S. Vanzant, R.C. Cochran, S. Stafford, G. St Jean, K. C. Olson
Kansas Agricultural Experiment Station Research Reports
Ruminal degradation of organic matter and protein in alfalfa and prairie hay were evaluated in vivo, using cannulated cows, and in vitro, using a continuous-culture fermenter to simulate ruminal fermentation. Estimates of organic matter degradability, microbial N flow per unit feed N input, and efficiency of microbial growth were not different (P>.10) between the in vivo and in vitro systems. However, for both forages, estimates of nitrogen degradability were greater with the in vitro system. Despite the differences between in vivo and in vitro techniques for some variables, continuous-culture fermentation will allow us to compare the effects of dietary …