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1986

Animal Sciences

Kansas State University Libraries

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Full-Text Articles in Life Sciences

Review Of Production Responses From Cows Fed Calcium Salt Of Isobutyric And Mixed 5-Carbon Volatile Fatty Acids (1986), James R. Dunham Jan 1986

Review Of Production Responses From Cows Fed Calcium Salt Of Isobutyric And Mixed 5-Carbon Volatile Fatty Acids (1986), James R. Dunham

Kansas Agricultural Experiment Station Research Reports

Recent developments in dairy cattle nutrition have resulted in the marketing of a calcium salt of isobutyric and mixed 5-carbon volatile fatty acids (IsoPlus®). The FDA approved product has been neutralized with calcium to form a dry salt of the acids, which are found naturally in the rumen. The following review of research results is intended as a guide for feeding IsoPlus®).; Dairy Day, 1986, Kansas State University, Manhattan, KS, 1986;

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Feed Additives (1986), James R. Dunham Jan 1986

Feed Additives (1986), James R. Dunham

Kansas Agricultural Experiment Station Research Reports

Feed additives are ration ingredients used in relatively small amounts to fortify certain nutrients or to affect a specific physiological function. The decision to include any additive should be based upon the economic response expected. The following guidelines are designed to help identify situations where additives may be considered.; Dairy Day, 1986, Kansas State University, Manhattan, KS, 1986;

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Adding Fat To Sow Lactation Diets: Effect On Sow And Litter Performance (1986), D Keesecker, B Wolf, Michael D. Tokach, Jim L. Nelssen Jan 1986

Adding Fat To Sow Lactation Diets: Effect On Sow And Litter Performance (1986), D Keesecker, B Wolf, Michael D. Tokach, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

An on-farm experiment was conducted utilizing 189 sows to evaluate the effect of adding 396 soybean oil to the lactational diet on subsequent pig performance and sow weight loss. Feeding sows a diet containing 3% soybean oil during lactation did not significantly decrease sow weight loss or improve litter performance. However, the oil addition tended to increase individual pig weaning weight (.5 Ib), litter weaning weight (3 lb), and sow feed intake (.5 lb/day) compared to feeding a 14% crude protein milo-soybean meal diet. Also, sow lactational weight loss was slightly reduced wit h the diet containing oil. Calculated metabolizable …

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Effect Of Dietary Addition Of Dried Whey And/Or Copper Sulfate On Starter Pig Performance (1986), R C. Thaler, M E. Johnston, G L. Allee, Jim L. Nelssen, Robert D. Goodband Jan 1986

Effect Of Dietary Addition Of Dried Whey And/Or Copper Sulfate On Starter Pig Performance (1986), R C. Thaler, M E. Johnston, G L. Allee, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Two 35-day trials involving 504 pigs were conducted to determine the efficacy of dietary supplementation of copper sulfate (CuS04) and/or dried whey to corn-soybean meal starter pig diets (1.25% lysine). Pigs were weaned at 21+3 days and ranged in average initial weight from 8.1 to 19.2 lbs. In trial 1, CuSO4 addition of either 0 or 250 ppm were made to diets containing 0, 10, and 20% extra-grade dried whey. At both 2 and 5 weeks, average daily gain (ADG), average daily feed intake (ADFI), and feed efficiency (F/G) improved linearly (P<.05) with increasing whey levels. Also, CuSO4 additions of 250 ppm increased ADG and ADFI (P<.05) at 2 and 5 weeks. The six dietary treatments in trial 2 consisted of a negative control (no CuSO4 or dried whey), and five other diets containing 250 ppm CuS04: with graded levels of dried whey (0, 5, 10, 15, and 20%). Dried whey additions linearly increased ADG and ADFI at both 2 and 5 weeks (P<.05), whereas F/G at 2 and 5 weeks was optimized at the 5% dried whey level. Copper sulfate supplementation improved ADG and F/G at 5 weeks (P<.05). These results suggest that CuS04 additions are beneficial for starter pig performance, and the 5% dried whey addition gave starter pig performance equal to that with 20% dried whey addition, when CuSO4 was present in both diets.; Swine Day, Manhattan, KS, November 20, 1986

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Evaluation Of Soybean Oil Additions In Starter Pig Diets (1986), R C. Thaler, M E. Johnston, G L. Allee, Jim L. Nelssen, Robert D. Goodband Jan 1986

Evaluation Of Soybean Oil Additions In Starter Pig Diets (1986), R C. Thaler, M E. Johnston, G L. Allee, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Two trials involving 420 weanling pigs (21+3 d) were conducted to determine the effects of additions of soybean oil (SO) on starter pig performance. Soybean oil additions of either 0, 1, 2, 3, 4, or 5% were made to the 1.25% lysine corn-soybean meal-dried whey basaI diet. In each trial, there were 7 pigs/pen and 5 replications. Data from the two trials were pooled except for feed efficiency (F/G) at 2-weeks, where a trial x treatment interaction existed. Average daily gain (ADG) and average daily feed intake (ADFI) were not affected by SO additions at 2 weeks but gains were …

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Supplementing Day-Old Pigs With Bovine Colostrum Or Milk Replacer (1986), C Bandyk, Robert H. Hines Jan 1986

Supplementing Day-Old Pigs With Bovine Colostrum Or Milk Replacer (1986), C Bandyk, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Seventy-five litters of newborn pigs from gilts were given either 20 cc of bovine colostrum or 20 cc of milk replacer through a stomach tube, and their weaning weight, scouring, and survival were compared with those of newborn pigs that were not treated. Results were broken down by birth weight groups: small-less than 2.3 lb.; medium-2.3 to 2.9 lbs.; large-3.0 lbs. and over. No significant differences in weaning weights were observed from treatment. Nontreated pigs tended to scour more than pigs treated with bovine colostrum but this difference was not statistically significant, partly because of the variation in the incidence …

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Endocrine Changes In Sows In Response To Altered Suckling And Boar Exposure (1986), E A. Newton, Jeffrey S. Stevenson, J Ernest Minton, Duane L. Davis Jan 1986

Endocrine Changes In Sows In Response To Altered Suckling And Boar Exposure (1986), E A. Newton, Jeffrey S. Stevenson, J Ernest Minton, Duane L. Davis

Kansas Agricultural Experiment Station Research Reports

Eighteen sows were treated as follows: 1) 10 multiparous and four primiparous sows were separated from their litters for 6 hr/day and exposed to a mature boar for 1 hr/day during the last 8 days of lactation, and 2) four sows (two multiparous and two primiparous) served as untreated controls during lactation. Blood was collected from sows during treatment and after weaning, and various hormones were measured. Altered suckling induced higher concentrations of luteinizing hormone (LH) that caused multiparous sows to show estrus (10/10) during lactation. Younger treated sows had similar increases in LH, but had higher follicle-stimulating hormone (FSH) …

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Best Weight To Market Hogs? (1986), Robert H. Hines Jan 1986

Best Weight To Market Hogs? (1986), Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

One of the important, recurring decisions that each hog producer must make is the weight at which to sell hogs. The decision to sell hogs may be influenced by cost and availability of feed, anticipated market hog price changes, weather conditions, overcrowding or need for facilities, or the need for cash for unpaid bills. All of these factors play an intricate role in the decision to market; however, the choice of when to sell may also influence production costs, price received, and carcass quality.; Swine Day, Manhattan, KS, November 20, 1986

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Testicular Development And Endocrine Function In Boars Fed Altrenogest (1986), E F. Kluber Iii, J Ernest Minton, Jeffrey S. Stevenson, Duane L. Davis Jan 1986

Testicular Development And Endocrine Function In Boars Fed Altrenogest (1986), E F. Kluber Iii, J Ernest Minton, Jeffrey S. Stevenson, Duane L. Davis

Kansas Agricultural Experiment Station Research Reports

Crossbred male pigs were used to evaluate the influence of a synthetic progestogen on reproductive development. Concentrations of luteinizing hormone (LH) and testosterone in blood serum were reduced while boars were being fed altrenogest (15 to 21 wk of age). At 25 wk of age (4 wk after withdrawal from altrenogest), weights of the testes and accessory reproductive glands and testicular content of sperm were reduced in boars that had been fed altrenogest. However, testicular weight and content of sperm had returned to control values following 12 wk after withdrawal from altrenogest. In addition, concentration of LH and testosterone in …

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Lean Value Marketing Programs (1986), P F. Maxson Jan 1986

Lean Value Marketing Programs (1986), P F. Maxson

Kansas Agricultural Experiment Station Research Reports

Recent promotion of the National Pork Producers Lean Guide to Pork Value has focused attention on providing pork producers with an economic incentive to raise lean, meaty hogs. The packing industry version of this value-based idea is generally termed a grade and yield program. While each individual packing plant may have its own grade and yield program, several factors need to be considered when marketing hogs grade and yield, regardless of the packing plant. The preferred weight range for a packing plants grade and yield program must be known. Packing plants available to Kansas usually range from 210-240 lb or …

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High Nutrient-Density Diets For Weanling Pigs (1986), Jim L. Nelssen Jan 1986

High Nutrient-Density Diets For Weanling Pigs (1986), Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

The increased occurrence of early weaning (4 weeks of age or less) of pigs has resulted in increased problems with a postweaning "lag" in many commercial swine units. The nursery is the weak link of most commercial swine operations. Attention to management factors that affect environment, health, and nutrition is the key to production success with early weaning. During the last decade, major research efforts have been expended by several universities to find nutritional programs to support satisfactory postweaning performance with early-weaned pigs. Ironically, many of the pigs used in these university trials were 4 weeks of age and weighed …

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Live Animal Ultrasonic Evaluation Of Backfat Thickness And Loin-Eye (1986), L M. Turlington, L R. Corah, Dell M. Allen, Jim L. Nelssen Jan 1986

Live Animal Ultrasonic Evaluation Of Backfat Thickness And Loin-Eye (1986), L M. Turlington, L R. Corah, Dell M. Allen, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Determination of backfat thickness and loin-eye area in swine is essential for continued genetic progress, and ultimately, pork product acceptance. Leaner, faster growing boars and gilts must be provided by seedstock suppliers to the commercial swine producer. Research information has consistently shown that lean, fast growing boars are more feed efficient. Since feed represents 60% to 75% of the total cost of production, any genetic improvement in feed efficiency would have a rapid payback to the commercial producer. Obviously, swine producers that utilize "lean value" marketing programs must have backfat and loin-eye area data on replacement boars, in order to …

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The Effects Of Additional Niacin During Gestation And Lactation On Sow And Litter Performance (1986), R C. Thaler, L M. Turlington, G L. Allee, Robert D. Goodband, Jim L. Nelssen Jan 1986

The Effects Of Additional Niacin During Gestation And Lactation On Sow And Litter Performance (1986), R C. Thaler, L M. Turlington, G L. Allee, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Sixty first-litter sows were utilized to evaluate the effects of additional niacin on sow and litter performance through two parities. The control diet provided sows with 50 mg niacin daily during gestation and 100 mg niacin daily during lactation. Dietary treatments were formulated to provide sows with either 5 or 10 times the level of supplemental niacin in the control diet. Litter size was equalized within dietary treatment by 24 hr after farrowing. During the first parity, sows fed additional niacin tended to have fewer total pigs born and pigs born alive (linear effect of niacin P<.10). In addition, sows fed additional niacin had fewer pigs equalized/litter (linear P(.05 and quadratic P<.06 effect of niacin), but tended to wean more pigs/litter and had a 6% greater pig survival rate than those fed the control diet. Average pig birth wt increased linearly (P<.05) as level of added niacin increased. Also, average pig wt and Litter wt at weaning were numerically higher for sows fed additional niacin during lactation. Sows fed the 250/500 mg/d niacin gestation-lactation sequence had more backfat on d 108 of gestation (quadratic effect of niacin, P<.05), but also lost more backfat during lactation (quadratic effect of niacin, P<.05).; Swine Day, Manhattan, KS, November 20, 1986

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The Effects Of Particle Size And Dried Whey Level In Barley Diets For Starter-Pigs (1986), Robert D. Goodband, Robert H. Hines Jan 1986

The Effects Of Particle Size And Dried Whey Level In Barley Diets For Starter-Pigs (1986), Robert D. Goodband, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Three hundred and thirty-six weanling pigs were utilized in two, 3 X 2 factorial design experiments to determine the effects of whey level (0, 10 or 20%) and particle size (1/8 or 3/16-in screen size) in barley diets on starter-pig performance. Grinding barley through a 1/8-in screen decreased the mean particle size of the diet compared to diets made up of barley ground through a 3/16-in screen. Average daily gain (ADG) and average daily feed intake (ADFI) increased linearly (P<.01) as whey level increased. Pigs fed diets containing 1/8-in ground barley were more efficient (P<.02) than those fed diets containing 3/16-in ground barley. However, pigs fed a 20% dried whey-milo-soybean meal control diet grew faster (P<.05) than those fed any of the barley starter diets. In these experiments, the relative feeding value of 20% dried whey-barley starter diet was 94-97% that of the 20'% dried whey-milo diet. Also, these results indicate that increasing levels of dried whey improves ADG and ADFI of pigs fed barley-based starter diets, and decreasing particle size of the diet improves feed efficiency.; Swine Day, Manhattan, KS, November 20, 1986

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Confinement And Type Of Penning Affects The Interval To Estrus And Synchrony Of Estrus In Gilts After Altrenogest (1986), Duane L. Davis, Jeffrey S. Stevenson Jan 1986

Confinement And Type Of Penning Affects The Interval To Estrus And Synchrony Of Estrus In Gilts After Altrenogest (1986), Duane L. Davis, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

We compared the effects of outside vs inside and individual vs group penning on the interval to estrus after synchronization of estrus with altrenogest. Altrenogest (15 mg/day) was fed for 14 days and penning treatments were initiated after the last altrenogest treatment. All groups were exposed to a boar (2 hr/day) for 3 days, beginning the day after last altrenogest, and then twice daily estrous detection was initiated. Outside penning shortened the interval to estrus after altrenogest. Synchrony of estrus was not affected by treatment but there was a tendency for gilts penned outside to exhibit estrus more synchronously.; Swine …

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Kansas Bull Test 15-Year Summary, R.R. Schalles, K.O. Zoellner, W. Olson Jan 1986

Kansas Bull Test 15-Year Summary, R.R. Schalles, K.O. Zoellner, W. Olson

Kansas Agricultural Experiment Station Research Reports

Bulls placed in Kansas Bull Tests have increased in weight, gain, frame, and scrotal circumference, while decreasing in fat thickness over the past 15 years. Bull buyers have been willing to pay for increased performance, with changes in bull prices generally reflecting changes in the other cattle prices.

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The Effect Of Gnrh On Pregnancy Rates In Estrus-Synchronized Beef Heifers, M. Ferguson, L. Corah Jan 1986

The Effect Of Gnrh On Pregnancy Rates In Estrus-Synchronized Beef Heifers, M. Ferguson, L. Corah

Kansas Agricultural Experiment Station Research Reports

Injecting 100 mcg of GnRH into cycling heifers at artificial insemination following estrus synchronization with either prostaglandin or Syncro-Mate-B® did not improve first service conception rate. However, GnRH improved first service conception in Syncro-Mate-B®-treated heifers that did not exhibit estrus prior to breeding and were bred by appointment.

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Adding Fat And/Or Sodium Bicarbonate To Steer Finishing Rations That Contain Wheat, J.R. Brethour, B. Lee, Jack G. Riley Jan 1986

Adding Fat And/Or Sodium Bicarbonate To Steer Finishing Rations That Contain Wheat, J.R. Brethour, B. Lee, Jack G. Riley

Kansas Agricultural Experiment Station Research Reports

Adding .6 pound fat or .22 pound sodium bicarbonate (soda) to finishing rations containing rolled wheat significantly improved performance and appeared to increase the substitution value of wheat. Both fat and soda increased feed intake. The improved gains from adding fat corresponded to increased energy intake. However, soda seemed to enhance nutrient utilization. There was more response to fat when we fed 100 percent vs. 50 percent wheat, but feeding 100 percent wheat depressed performance, with or without fat, to unsatisfactory levels.

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Effect Of Maturity At Harvest On Yield, Composition, And Feeding Value Of Hybrid Forage Sorghum Silages, J. Dickerson, K. Bolsen, S. Hamma, J. Hoover Jan 1986

Effect Of Maturity At Harvest On Yield, Composition, And Feeding Value Of Hybrid Forage Sorghum Silages, J. Dickerson, K. Bolsen, S. Hamma, J. Hoover

Kansas Agricultural Experiment Station Research Reports

Results from three trials showed the diversity among forage sorghum hybrids for both agronomic and nutritive characteristics. Later maturing and nonheading hybrids produced silages with low dry matter (DM) contents, low pH values, high levels of fermentation acids, and low voluntary intakes. Earlier maturing and moderate grain-producing hybrids, but their silages had high DM contents and higher voluntary intakes. Stage of maturity at harvest had surprisingly little influence on silage chemical composition, intake, or digestibility.

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Effect Of Inoculants On The Fermentation Of Wheat, Alfalfa, And Sorghum Silages, K. Bolsen, R. Smith, H. Ilg, Daniel Y.C. Fung Jan 1986

Effect Of Inoculants On The Fermentation Of Wheat, Alfalfa, And Sorghum Silages, K. Bolsen, R. Smith, H. Ilg, Daniel Y.C. Fung

Kansas Agricultural Experiment Station Research Reports

Results from three laboratory silo experiments showed that four commercial silage inoculants increased fermentation rate, particularly during the first 4 days of the ensiling process. The effects of the additives on pH drop and lactic acid production were greater in wheat and alfalfa than in forage sorghum.

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Bovatec® Vs. Rumensin® Fed In Free-Choice Mineral-Grain Mixtures On Early Intensively Grazed, Native Grass, F. Brazle, Gerry L. Kuhl Jan 1986

Bovatec® Vs. Rumensin® Fed In Free-Choice Mineral-Grain Mixtures On Early Intensively Grazed, Native Grass, F. Brazle, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

The performance of grazing heifers offered a free-choice mineral or two mineral-grain-ionophore mixtures was evaluated in 3-year study. Heifers ate more of the supplement containing Bovatec® than that containing Rumensin® (P<.05). Heifers fed Bovatec® gained faster (P<.10) than those fed Rumensin® or the control mineral mixture.

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Dairy Replacement Heifer Nutrition (1986), J.L. Morrill Jan 1986

Dairy Replacement Heifer Nutrition (1986), J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

Proper nutrition and management are necessary to provide adequate numbers of healthy herd replacements. Satisfactory heifer programs must take into consideration care of the dam and characteristics of the newborn calf, including the deficiency of circulating antibodies at birth and the lack of a functioning rumen. Nutrition. Nutrition of the dry cow is very important because of the effect this has on the next lactation as well as 0[1 the developing fetus. Several points should receive special attention. (l) Provide adequate protein and energy to meet requirements. (2) Increase concentrate intake gradually during the last part of the "¢ dry …

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Replacement Heifers - Breeding Management (1986), Edward P. Call Jan 1986

Replacement Heifers - Breeding Management (1986), Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Records are the backbone of any breeding program. Artificial insemination (AI) is essential to maximizing genetic gain and minimizing calving problems and breeding costs. In addition, AI allows controlled calving - calving at the dairyman's discretion - not Mother Nature's! Adequately grown heifers should be added to the breeding list during the 13th month of age and serviced to meet the herd's calving goal. Feeding and handling systems should not change during the month preceding and during the breeding period, in order to minimize stress on the reproductive system. Economic loss because of delayed calving beyond 24 months of age …

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Vitamin E Requirements Of Dairy Calves (1986), P.G. Reddy, J.L. Morrill, H.C. Minocha, R.A. Frey Jan 1986

Vitamin E Requirements Of Dairy Calves (1986), P.G. Reddy, J.L. Morrill, H.C. Minocha, R.A. Frey

Kansas Agricultural Experiment Station Research Reports

Thirty-two Holstein heifer calves receiving conventional rations were supplemented with 0 (control), 125, 250, or 500 IU vitamin E/calf/day. The objective was to determine the optimum requirement based on their performance from birth to 24 wk of age. Results on weight gains, feed consumption, serum enzymes indicative of cell membrane damage, immune responses, and metabolic profile indicated that supplementation of calves receiving conventional rations with 125 to 250 IU/day may maximize their performance.; Dairy Day, 1986, Kansas State University, Manhattan, KS, 1986;

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Ration Fiber Analysis (1986), J.L. Morrill Jan 1986

Ration Fiber Analysis (1986), J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

For many years, fiber in dairy rations was measured and expressed as crude fiber. More recently acid detergent fiber (ADF) and neutral detergent fiber (NDF) have been used. The crude fiber (CF) determination uses acid and alkali treatment and is an attempt to simulate reactions within the digestive tract, whereas the newer techniques use detergents and attempt to divide the plant cells into their component parts. Thus, NDF is resistant to breakdown by a certain detergent in neutral solution and represents the structural part of the cell, the cell wall. Acid detergent fiber is resistant to breakdown by a certain …

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Milk Progesterone Kits: On-Farm Use (1986), Jeffrey S. Stevenson, Edward P. Call Jan 1986

Milk Progesterone Kits: On-Farm Use (1986), Jeffrey S. Stevenson, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Diagnosing pregnancy in dairy cattle is an essential part of good management. The objective of this procedure is not to identify pregnant cows, but to identify the nonpregnant cows, those that become the breeding challenge. Economics dictate that verifying the pregnancy or "open" status of the cow is essential. Estimated losses of $1 to $3 per cow per day when conception is delayed beyond 85 days postpartum emphasize the importance of inseminating cows early to allow for 12 to 13-month calving intervals. A number of diagnostic tools are available and increasing scientific knowledge and technology will provide for improved pregnancy …

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Effects Of Compudose® Implants From Birth To Slaughter On Carcass And Meat Traits Of Young Bulls And Steers, T.D. Hopkins, Michael E. Dikeman Jan 1986

Effects Of Compudose® Implants From Birth To Slaughter On Carcass And Meat Traits Of Young Bulls And Steers, T.D. Hopkins, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Implanting young bulls with Compudose® three times from birth to slaughter resulted in performance similar to that of nonimplanted bulls, but decreased masculinity development. Implanted bulls tended to have higher marbling scores, more tender meat, more youthful carcasses, and lighter lean color than nonimplanted bulls. Although both implanted and nonimplanted bulls were more efficient and gained faster in the feedlot than implanted steers, the steers showed very little carcass masculinity and had finer-textured lean. Implanted steers had more youthful carcasses and lower Warner-Bratzler shear values than nonimplanted bulls. However, nonimplanted bulls grew faster, were more efficient, had larger ribeyes and …

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Heterosis In Simmental Angus Rotational-Cross Calves, L.A. Kriese, R.R. Schalles, Lyle W. Lomas Jan 1986

Heterosis In Simmental Angus Rotational-Cross Calves, L.A. Kriese, R.R. Schalles, Lyle W. Lomas

Kansas Agricultural Experiment Station Research Reports

Heterosis estimates were determined for gestation length, birth weight, and yearling weight using a two-breed rotational crossbreeding system with Angus and Simmental cattle. Heterosis for gestation length was -.3%; birth weight, 8.31%; weaning weight 5.05%, and yearling weight, 5.39%. Angus-sired calves from Simmental darns were significantly heavier at weaning and as yearlings than the reciprocal cross.

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Methods Of Tenderization For Value-Added, Hot-Boned, Restructured, Pre-Cooked Roasts From Cows, H.A. Flores, Donald H. Kropf, Melvin C. Hunt, Curtis L. Kastner Jan 1986

Methods Of Tenderization For Value-Added, Hot-Boned, Restructured, Pre-Cooked Roasts From Cows, H.A. Flores, Donald H. Kropf, Melvin C. Hunt, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Restructured, pre-cooked roasts were prepared from four hot-boned USDA Utility grade cow carcasses. Before forming the roasts, meat was either blade tenderized, manually trimmed of large connective tissue deposits, or both blade tenderized and trimmed. Control roasts received neither treatment. Although trimming minimized the negative effects of connective tissue, blade tenderization was frequently as effective, and sometimes superior, and minimized the high labor costs and shrink losses associated with manual trimming.

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Reproductive Performance Of Angus X Hereford And Brahman X Hereford Heifers Fed To Prebeeding Target Weights, D.J. Patterson, L.R. Corah, D.D. Simms, J.R. Brethour, W.R. Negus Jan 1986

Reproductive Performance Of Angus X Hereford And Brahman X Hereford Heifers Fed To Prebeeding Target Weights, D.J. Patterson, L.R. Corah, D.D. Simms, J.R. Brethour, W.R. Negus

Kansas Agricultural Experiment Station Research Reports

Heifer development as effected by nutrition was evaluated in 148 F Angus x Hereford (A x H) and 148 F Brahman x Hereford (B x H) heifers. Heifers within each breed cross were assigned to one of two energy levels and weight groups. Heifers on the low and high energy-level diets were fed to reach 55 or 65%, respectively, of their projected mature body weights by the start of spring breeding. A higher (P<.05) percentage of A x H heifers had reached puberty by the start of spring breeding; however, their average age at puberty was greater (P<.05) than that of B x H heifers. Weight at puberty, for heifers that cycled prior to the start of spring breeding, did not differ between breed groups. Weight of heifers at puberty was greater with the high-energy than with the low-energy diets. Prebreeding body condition scores of heifers on the two energy levels differed (P<.05) more among the A x H females. The A x H heifers had higher (P<.05) fall pregnancy rates than the B x H heifers (89.2 vs 71.9%). Energy level has no significant effect on fall pregnancy rate of A x H heifers, but B x H heifers on the high-energy level had a higher (P<.05) pregnancy rate than those on the low-energy diet.

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