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Animal Sciences

Kansas Agricultural Experiment Station Research Reports

1989

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Articles 31 - 60 of 90

Full-Text Articles in Life Sciences

Neutrophil And Lymphocyteresponse To Vitamins C And Esupplementation In Young Calves (1989), S.D. Pruiett, J.L. Morrill, Frank Blecha, James J. Higgins Jan 1989

Neutrophil And Lymphocyteresponse To Vitamins C And Esupplementation In Young Calves (1989), S.D. Pruiett, J.L. Morrill, Frank Blecha, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Calves were bottle-fed milk replacers at 10% of weekly adjusted body weight for 8 wk. Treatments were 1) no supplements (control), 2) .16 oz vitamin C, or 3) .16 oz vitamin C plus 125 IU/lb vitamin E. Lymphocytes and neutrophils isolated from day 14 and day 28 blood samples were assayed for neutrophil-mediated S. aureus phagocytosis and antibody-dependent cellular cytotoxicity, and for mitogen induced lymphocyte proliferation. Eye and nasal discharges of calves supplemented with vitamin C and vitamins C plus E were less than those of control calves for wk 1 to 8. Lymphocyte proliferation with the mitogens showed a …

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Utilization Of Near Infrared Reflectancefor The Determination Of Fat, Moisture,And Protein In Cheddar Cheese (1989), G.S. Zink, I.J. Jeon, L.H. Harbers Jan 1989

Utilization Of Near Infrared Reflectancefor The Determination Of Fat, Moisture,And Protein In Cheddar Cheese (1989), G.S. Zink, I.J. Jeon, L.H. Harbers

Kansas Agricultural Experiment Station Research Reports

Near infrared reflectance spectroscopy (NIRS) was used to develop calibration equations for the rapid determination of moisture, protein, and fat in Cheddar cheese. Most mean values from NIRS data had lower standard deviations than values obtained by standard laboratory procedures. A larger number of samples is needed to refine calibrations and validate the equations.; Dairy Day, 1989, Kansas State University, Manhattan, KS, 1989; The 1989 Annual KSU Dairy Day is known as Dairy Day, 1989

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Pregnancy Rates Of Dairy Cows At First Service:Influence Of Gonadotropin-Releasing Hormoneand Timing Of Ai Relative To Estrus (1989), Jeffrey S. Stevenson, M.O. Mee, R.K. Scoby, Y. Folman Jan 1989

Pregnancy Rates Of Dairy Cows At First Service:Influence Of Gonadotropin-Releasing Hormoneand Timing Of Ai Relative To Estrus (1989), Jeffrey S. Stevenson, M.O. Mee, R.K. Scoby, Y. Folman

Kansas Agricultural Experiment Station Research Reports

We demonstrated that gonadotropin-releasing hormone (GnRH or Cystorelin®) failed to improve pregnancy rates at the first service. When GnRH injection and insemination are both carried out either in early or late estrus or if cows are bred in early estrus and given a GnRH injection later in estrus, pregnancy rates are reduced by 9 to 13 percentage points compared to breeding according to the am-pm rule without GnRH treatment (control). Pregnancy rates of cows injected with GnRH early in estrus and bred in late estrus were similar to controls injected with saline and inseminated late in estrus (46 vs 43%). …

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The Use Of Bovine Somatotropin (Bst) In Dairy Cattle (1989), J. Estrada, John E. Shirley Jan 1989

The Use Of Bovine Somatotropin (Bst) In Dairy Cattle (1989), J. Estrada, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

We all have heard about the use of BST in lactating dairy cattle during the last 6 to 8 years, but what is BST? Bovine somatotropin is another dairy management tool developed to improve the efficiency and reduce the cost of producing milk. It is the newest in a list of technological advances in the dairy industry, such as genetic improvements, nutrition, health, housing, milking equipment and techniques, embryo transfer, and DHI records. BST is a natural protein produced in the anterior pituitary gland of all cattle. Like other proteins, BST is composed of various amino acids (190-199). BST is …

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Liver Fluke Infestation In Kansas Fed Slaughter Cattle, S.B. Laudert Jan 1989

Liver Fluke Infestation In Kansas Fed Slaughter Cattle, S.B. Laudert

Kansas Agricultural Experiment Station Research Reports

Feedlot cattle from 1,687 pens totaling 290,183 head were evaluated at slaughter for the presence of liver flukes. Overall, 4.92% of the cattle were found to be infected. Only 15.2% of all pens of cattle were found to be completely free of flukes. However, only 5.3% of the pens had greater than 15% of the cattle infested. Beef steers had a higher level of infestation (5.2%) than beef heifers (4.4%). Holstein steers had an overall infestation rate of 4.4%.

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Fecal Thiaminase In Feedlot Cattle, T.D. Hays, B.E. Brent Jan 1989

Fecal Thiaminase In Feedlot Cattle, T.D. Hays, B.E. Brent

Kansas Agricultural Experiment Station Research Reports

Fecal thiaminase was measured on 152 feedlot cattle at three locations and on a variety of rations. No animals showed signs of polioencephalomalacia. Thiaminase activities ranged from 0.6 to 430 µmol thiamin destroyed per minute per liter of feces (µmol/min/l). Eighty-two percent of the thiaminase activities were below 20 µmol/min/l, and only 3 percent were less than 2 µmol/min/l. High levels of fecal thiaminase were apparently not related to ration. Thiaminase was detected in all animals studied, but one location had only minimal levels. When high levels of thiaminase were found, the samples were re-assayedt and the enzyme was confirmed …

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Conception Rates Of Beef Heifers Treated With Gnrh Analog At The Time Of Estrus Or At The Time Of Artificial Insemination., L.R. Corah, W.E. Beal, M.F. Spire, Jeffrey S. Stevenson Jan 1989

Conception Rates Of Beef Heifers Treated With Gnrh Analog At The Time Of Estrus Or At The Time Of Artificial Insemination., L.R. Corah, W.E. Beal, M.F. Spire, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Injecting a GnRH-analog at the time of estrus or at insemination did not generally improve conception rates in heifers inseminated following a synchronized estrus. However, within some herds. a significant positive response was noted.

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Splay-Foot In Cattle, R.R. Schalles, R.W. Markham, H.W. Leipold, M.F. Spire Jan 1989

Splay-Foot In Cattle, R.R. Schalles, R.W. Markham, H.W. Leipold, M.F. Spire

Kansas Agricultural Experiment Station Research Reports

Angular limb deformity, observed in several breeds of cattle, results in a knock-kneed and splay-footed condition in the front legs. This study shows that angular limb deformity is a congenital structural defect, inherited as a simple, autosomal, recessive trait.

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Influence Of Limited-Creep Feeding On Pre- And Postweaning Performance Of Spring-Born Calves, C.E. Binns, F.K. Brazle, Gerry L. Kuhl, D.D. Simms, K.O. Zoellner, L.R. Corah Jan 1989

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

Kansas Agricultural Experiment Station Research Reports

Limit-feeding a high protein creep (36% CP) and a high energy creep (16% CP) was compared with no supplementation in a 61-day preweaning trial. Salt was used to limit daily creep intake to 1.5 to 2.0 lb per head. Calves given the limited energy and protein creep feeds outgained (P<.01) the unsupplemented calves by 0.2 lb and 0.3 lb, respectively. Conversion of creep feed consumed to extra gain was 6.7 and 5.3 for the energy and protein creep-fed calves, respectively (salt included). Trucking shrink of the noncreep-fed calves on the day of weaning and shipping was 4.9 lb and 7.0 lb less (P<.05) than that of the energy and protein creep-fed calves, respectively. Postweaning daily gains of the energy creep-fed calves was higher than those of both the protein creep-fed calves (P=.09) and the noncreep-fed calves (P<.01) by 0.3 lb and 0.5 lb, respectively. The energy creep-fed calves consumed more (P<.05) daily dry matter than the protein creep-fed and unsupplemented calves. Little difference was observed in postweaning feed conversion among creep treatments.

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Syncro-Mate B® Induces Estrus In Cows Without Ovaries, W.J. Mcguire, G.H. Kiracofe Jan 1989

Syncro-Mate B® Induces Estrus In Cows Without Ovaries, W.J. Mcguire, G.H. Kiracofe

Kansas Agricultural Experiment Station Research Reports

Syncro-Mate B® was capable of inducing estrous behavior in ovariectomized cows. Lengthening the norgestomet implant period from 9 to 18 days did not prevent estrus. The ability of Syncro-Mate B to induce estrous behavior in ovariectomized cows helps explain the variable conception rates obtained after using this product in intact cows.

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Performance Of Stocker Steers Grazing Smooth Bromegrass At Two Stocking Rates And Dewormed With Morantel Tartrate, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas Jan 1989

Performance Of Stocker Steers Grazing Smooth Bromegrass At Two Stocking Rates And Dewormed With Morantel Tartrate, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas

Kansas Agricultural Experiment Station Research Reports

Early-intensive grazing of smooth bromegrass reduced animal gains but improved gain/acre. Morantel tartrate reduced fecal nematode egg counts but had no effect on animal performance at either stocking rate

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Effect Of Limited-Creep Feeding On Performance Of Spring-Born Calves: Results Of 1988 Field Trials, D.D. Simms, Gerry L. Kuhl Jan 1989

Effect Of Limited-Creep Feeding On Performance Of Spring-Born Calves: Results Of 1988 Field Trials, D.D. Simms, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Two field trials were conducted to evaluate limited-creep feeding of spring- born calves using pelleted creep rations with either 0.5, 5, or 10% salt. Average daily gain was increased (P<.05) over controls in trial 2 and when both trials were combined. However, intakes were higher than desired and feed conversion much poorer than expected.

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Soybean Meal+Milo, Alfalfa Hay, And Dehydrated Alfalfa Pellets As Protein Sources For Steers Fed Dormant, Native Tallgrass Forage In Drylot, T. Delcurto, R.C. Cochran, A.A. Beharka, E.S. Vanzant, Tiruvoor G. Nagaraja Jan 1989

Soybean Meal+Milo, Alfalfa Hay, And Dehydrated Alfalfa Pellets As Protein Sources For Steers Fed Dormant, Native Tallgrass Forage In Drylot, T. Delcurto, R.C. Cochran, A.A. Beharka, E.S. Vanzant, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

Sixteen ruminally-cannulated steers consuming dormant tallgrass-prairie forage were randomly assigned to one of four treatments: 1) control, no supplement; 2) soybean meal (SBM)+sorghum grain; 3) alfalfa hay; or 4) dehydrated alfalfa pellets. Forage dry matter (DM) intake was at least doubled by all three supplemental protein treatments (P<.01). In addition, steers supplemented with dehydrated alfalfa pellets displayed 15% higher forage DM intakes than steers supplemented with SBM+sorghum grain or alfalfa hay. Total DM digestibility did not differ (P>.10) among treatments; however, fiber (NDF) digestibility was depressed in steers supplemented with SBM+sorghum grain or dehydrated alfalfa pellets, compared with controls. Results from this study reinforce the concept that supplemental protein improves forage intake and utilization. Additionally, alfalfa hay and dehydrated alfalfa pellets appear to be at least as effective as …

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Limit Versus Full Creep-Feeding Of A High Protein Supplement To Calves Grazing Late Summer Bluestem, R.C. Cochran, C.E. Binns, L.R. Corah, T. Delcurto, E.S. Vanzant Jan 1989

Limit Versus Full Creep-Feeding Of A High Protein Supplement To Calves Grazing Late Summer Bluestem, R.C. Cochran, C.E. Binns, L.R. Corah, T. Delcurto, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Limit creep-feeding a 36% protein supplement (avg. salt concentration = 7.9%) was compared with unlimited consumption of the same supplement without salt (full creep-feeding) and with no supplementation. Average daily gain of steer calves was increased (P≤.06) by.19 (limit creep-feeding) and .38 (full creep-feeding) lb per day compared with non-supplemented calves. Average daily gain of heifer calves was not increased by creep feeding. Efficiency with which creep was converted to extra gain was poor for both limit and full creep-feeding groups. Little difference was observed in postweaning average daily gains; however, the calves given ad libitum access to creep feed …

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Effect Of Inoculants And Npn Additives On Dry Matter Recovery And Cattle Performance: A Summary Of 22 Trials, K.K. Bolsen, A. Laytimi, Ronald V. Pope, Jack G. Riley Jan 1989

Effect Of Inoculants And Npn Additives On Dry Matter Recovery And Cattle Performance: A Summary Of 22 Trials, K.K. Bolsen, A. Laytimi, Ronald V. Pope, Jack G. Riley

Kansas Agricultural Experiment Station Research Reports

Results from 22 trials comparing dry matter (DM) recovery and cattle performance of inoculated or non-protein nitrogen (NPN)-treated silages to controls were summarized using paired t-test analysis. Inoculants consistently improved DM recoveries and gains per ton of crop ensiled in both com and forage sorghums. The use of NPN adversely affected nutrient preservation and gain per ton of crop ensiled, particularly for the wetter forage sorghums.

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Effect Of Commercial Inoculants On Fermentation Of 1988 Silage Crops, K.K. Bolsen, A. Laytimi, S. Azimi, R.A. Hart, F. Niroomand, J. Bradford, L. Clare Jan 1989

Effect Of Commercial Inoculants On Fermentation Of 1988 Silage Crops, K.K. Bolsen, A. Laytimi, S. Azimi, R.A. Hart, F. Niroomand, J. Bradford, L. Clare

Kansas Agricultural Experiment Station Research Reports

We have measured silage fermentation dynamics in over 50 crops since the development of a 4 x 14 inch PVC pipe, laboratory-scale silo in 1984. In many of these experiments, our objective was to determine how inoculants or inoculant/enzyme combinations affected the rate and efficiency of the ensiling process. Twenty-five different inoculants have been tested over a wide range of ensiling conditions. Results show that the majority of silage inoculants available today are able to supply a high number of lactic acid bacteria (LAB) and to improve silage fermentation in most crops (KAES, Reports of Progress 494, 514, and 539). …

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Near-Infrared Reflectance Spectroscopy Calibrations For Sorghum Silage, P.C. Dubois, G. Garcia, K.K. Bolsen, L.H. Harbers Jan 1989

Near-Infrared Reflectance Spectroscopy Calibrations For Sorghum Silage, P.C. Dubois, G. Garcia, K.K. Bolsen, L.H. Harbers

Kansas Agricultural Experiment Station Research Reports

Calibrations for near-infrared reflectance spectroscopy (NIRS) analysis of sorghum silage and sheep feces samples were developed. with mixed success. For sorghum silage, the standard errors of calibration (SEC) and correlation coefficients of calibration (R2) for crude protein (CP) were .405% and .927; for acid detergent fiber (ADF), 1.667% and .943; and for neutral detergent fiber (NDF), 1.589% and .964, respectively. The statistics for crude protein were not as good as similar work reported in the literature, but the data for the fiber components was as good as or better than similar reported work. For sheep feces. the SEC and R2 …

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A Comparison Of Flavor And Tenderness Between Dry-Aged And Vacuum-Aged Beef Strip Loins, K. Warren, Curtis L. Kastner Jan 1989

A Comparison Of Flavor And Tenderness Between Dry-Aged And Vacuum-Aged Beef Strip Loins, K. Warren, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Starting 3 days postmortem, sections from eight USDA Choice or better, yield grade 4, strip loins were dry-aged (aged unpackaged) or vacuum-aged (aged in vacuum bags) for an additional 11 days. The dry-aged loins lost more (P<.05) weight during aging than vacuum-aged loins, and cooked faster, with less (P<.05) cooking loss than the unaged loins. Vacuum-and dry-aged samples were similar (P>.05) in tenderness, and both were more tender (P<.05) than unaged counterparts. A trained taste panel found no differences in subcutaneous fat flavor. However, lean from the vacuum-aged samples had a more intense sour flavor note and more intense bloody/serumy flavor and metallic notes than either of the other treatments. The lean of dry-aged samples was beefier and had more brown/roasted flavor than vacuum-aged or unaged counterparts.

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The Reaction Of Slaughter Hog Cash And Futures Prices To Usda Hogs And Pigs Reports (1989), Ted C. Schroeder, J R. Mintert, John M. Blair Jan 1989

The Reaction Of Slaughter Hog Cash And Futures Prices To Usda Hogs And Pigs Reports (1989), Ted C. Schroeder, J R. Mintert, John M. Blair

Kansas Agricultural Experiment Station Research Reports

This study examined the reaction of slaughter hog cash and futures prices to USDA Hogs and Pigs reports. Over the 1972-87 period, the nearby live hog futures price had $1/cwt or larger absolute price changes on 48% of the trading days immediately after the Hogs and Pigs report release compared to 6% of the days of the release, suggesting that the reports arc providing important new information to the market. Average price moves in cash and futures markets following the report releases were positive, suggesting that price usually increased the day after the reports. Over the 1972-87 period, the cash …

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The Effect Of Dietary Energy Density And Porcine Somatotropin On Apparent Digestibility And Retention Of Nutrients In Finishing Swine (1989), G R. Stoner, B R. Schricker, Jim L. Nelssen, Robert D. Goodband, Robert H. Hines Jan 1989

The Effect Of Dietary Energy Density And Porcine Somatotropin On Apparent Digestibility And Retention Of Nutrients In Finishing Swine (1989), G R. Stoner, B R. Schricker, Jim L. Nelssen, Robert D. Goodband, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Sixteen barrows were used in a metabolism study (avg wt of 101.2 lb) to evaluate the effect of dietary energy density and porcine somatotropin (pST) on apparent digestibility and retention of nutrients in finishing pigs. This study was designed as a split-plot with 4 mg pST/d or placebo injection as whole plot treatments and four dietary energy densities (1.37, 1.48, 1.60, and 1.71 Meal ME/lb) and period as the subplot treatments. Increasing dietary energy density increased apparent digestibility of dry matter, gross energy, and nitrogen, but had no effect on nitrogen retention. Porcine somatotropin administration had no effect on apparent …

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The Effect Of Dietary Energy Density On Growth Performance Of Finishing Swine Treated With Porcine Somatotropin (1989), G R. Stoner, B R. Schricker, Jim L. Nelssen, Robert D. Goodband, Robert H. Hines Jan 1989

The Effect Of Dietary Energy Density On Growth Performance Of Finishing Swine Treated With Porcine Somatotropin (1989), G R. Stoner, B R. Schricker, Jim L. Nelssen, Robert D. Goodband, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

A growth study (60 barrows averaging 125.4 lb) was conducted to evaluate the effect of dietary energy density on growth performance of finishing pigs treated with porcine somatotropin (pST). Barrows were blocked on weight and allotted randomly to pens (2 barrows/pen, 5 pens/treatment). Barrows were injected daily with 4 mg pST and fed six experimental diets with four energy densities (1.37, 1.48, 1.60, or 1.71 Meal ME/lb) and four lysinc:energy ratios (4.0, 3.7, 3.4, or 3.2 g lysine/Mcal ME). Diets were formulated to contain at least 200% of NRC (1988) recommendations for essential nutrients. Increasing dietary energy density and adjusting …

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Space Requirements Of Finishing Pigs Fed To An Average Pen Weight Of 250 Pounds (1989), R I. Nicholson, G E. Fitzner, David A. Nichols, Joe D. Hancock, Robert H. Hines, Robert D. Goodband, Jim L. Nelssen Jan 1989

Space Requirements Of Finishing Pigs Fed To An Average Pen Weight Of 250 Pounds (1989), R I. Nicholson, G E. Fitzner, David A. Nichols, Joe D. Hancock, Robert H. Hines, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Space allowances of 6, 8, 10, and 12 ft^2 were evaluated for pigs fed from 130 lb to a pen average of 250 lb. Average daily gain and average daily feed intake. increased linearly (P<.05) as space allowance increased. However, those pigs permitted 10 or 12 ft^2 of space were similar in avg daily gain, avg daily feed intake, and feed efficiency, suggesting that 10 ft^2 of space is adequate for feeding finishing hogs to a heavier average pen weight. Coefficients of variation (CV) for initial weight and final weight were increased for pigs with 6 ft^2, whereas for those exposed to 10 and 12 ft^2, the CV was reduced, indicating more uniform pigs at final weight with greater space allowance.; Swine Day, Manhattan, KS, November 16, 1989

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Nutritional Considerations For Improved Lean Value (1989), Jim L. Nelssen Jan 1989

Nutritional Considerations For Improved Lean Value (1989), Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

The swine industry is in a transitional period as it gears up to produce the lean meat required by the consumer. In fact, pork processors arc increasing the production of lean products (boneless loins, 95% fat-free hams) because consumers are willing to pay premiums for low-fat products. New methods of measuring the amount of lean pork (fat-a-meter, etc.) are being developed rapidly, in order to allow the packer to offer price differentials for lean compared to fat pigs. Pork producers, in my opinion, will adjust production systems to meet consumer demands for lean pork when monetary differentials are offered by …

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Evaluation Of Oral Escherichia Coli Bacterin And Water Medication On Performance Of Weaned Pigs (1989), D A. Schoneweis, R I. Nicholson, G E. Fitzner, Robert H. Hines Jan 1989

Evaluation Of Oral Escherichia Coli Bacterin And Water Medication On Performance Of Weaned Pigs (1989), D A. Schoneweis, R I. Nicholson, G E. Fitzner, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Odd-numbered pigs in new-born litters were vaccinated on d 1 with an oral Escherichia coli bacterin and their performance after weaning was compared with that of nonvaccinated littermates (even numbered pigs). In addition, each group of pigs was allotted to four water medication treatments that were administered from d 2 to d 6 after weaning. No significant interaction between vaccine and water treatment was observed. Vaccinated and non-vaccinated pigs performed similarly throughout the trial for the traits of ADG, ADFI, and F/G, indicating no beneficial effect from vaccination. Water medication after weaning did not affect performance or incidence of scours …

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Effects Of Lecithin And Lysolecithin On The Digestibility Of Fat Sources In Diets For Weanling Pigs (1989), D B. Jones, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock Jan 1989

Effects Of Lecithin And Lysolecithin On The Digestibility Of Fat Sources In Diets For Weanling Pigs (1989), D B. Jones, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Ninety-six pigs (17 d of age and 11.6 lb initial wt) were utilized to determine if adding emulsifiers (lecithin and lysolecithin) to diets containing 10% added fat would affect nutrient digestibility. Fat sources were: 1) soybean oil, 2) tallow, 3) lard, and 4) coconut oil. Lecithin and lysolecithin were added as 10% of the added fat. Pigs were limit fed using the following equation: daily feed allowance = .05 x body wt^9. After a 7-d adjustment period, feces were collected for 4 d, pooled, and analyzed for fat, nitrogen, and energy content. Soybean oil and coconut oil were more digestible …

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Application Of Technology For Maximizing Lean Growth (1989), Robert D. Goodband Jan 1989

Application Of Technology For Maximizing Lean Growth (1989), Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

The swine industry is at a crossroads that either mayor may not change the way we produce pork in the future. As we head into the 90's, we are entering a new era in terms of growth promotion and carcass modification,which will produce overnight what would have taken generations to select for. Of the compounds tested, porcine somatotropin (pST) has the most potential to alter the structure of the swine industry. Many fear the application of this technology because of potential increases in pork production displacing and leading to fewer producers. Because pork quality will be improved tremendously (50% reduction …

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Effects Of Daily Porcine Somatotropin Administration On The Performance And Carcass Characteristics Of Finishing Swine (1989), G E. Fitzner, David A. Nichols, B R. Schricker, D E. Darden, T L. Weeden, Robert D. Goodband, Robert H. Hines, Jim L. Nelssen, Donald H. Kropf Jan 1989

Effects Of Daily Porcine Somatotropin Administration On The Performance And Carcass Characteristics Of Finishing Swine (1989), G E. Fitzner, David A. Nichols, B R. Schricker, D E. Darden, T L. Weeden, Robert D. Goodband, Robert H. Hines, Jim L. Nelssen, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

One hundred forty-four pigs (72 barrows and 72 gilts) were utilized in six treatments with six pens each to evaluate four levels of daily porcine somatotropin (pST) injections (0, 1, 3, or 5 mg/d) in combination with diets containing 13 or 16% crude protein (CP). One randomly selected pig from each pen was slaughtered when it reached a weight between 230 and 240 lb. Daily feed intake (ADFI), tenth rib backfat, and estimated percentage of lean pork were reduced in pigs fed the 13% CP diet and injected with 3 mg/d pST compared to pigs fed the same diet and …

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Effects Of Lecithin And Lysolecithin Additions On Growth Performance And Nutrient Digestibility In Weanling Pigs (1989), D B. Jones, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock Jan 1989

Effects Of Lecithin And Lysolecithin Additions On Growth Performance And Nutrient Digestibility In Weanling Pigs (1989), D B. Jones, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Two hundred seventy pigs (21 d of age and 12.8 lb initial wt) were used to determine if adding emulsifiers (lecithin and lysolecithin) to starter pig diets affects growth performance and digestibility of nutrients. Treatments were: 1) corn-soy control; 2) diet 1 with soybean oil; 3) diet 1 with tallow; 4, 5, and 6) diet 3 with lecithin replacing 5%, 10%, and 30% of the tallow; 7, 8, and 9) diet 3 with lysolecithin replacing 5%, 10%, and 30% of the tallow. Average daily gain (ADG), average daily feed intake (ADFI), and feed/gain ratio (F/G) were determined weekly during the …

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Development Of Methods For Studying Embryo-Uterine Interactions (1989), Z Zhang, Duane L. Davis Jan 1989

Development Of Methods For Studying Embryo-Uterine Interactions (1989), Z Zhang, Duane L. Davis

Kansas Agricultural Experiment Station Research Reports

The endometrium (lining of the uterus) functions to support and nurture developing embryos. However, 20 to 30% of pig embryos are lost in early pregnancy. Therefore, we developed methods to study the endometrium. Our initial work addresses the production of prostaglandins by the endometrium. Prostaglandins are known to play important roles in the establishment of pregnancy. In the pig, this process occurs near the end of the second week of pregnancy. Therefore, we determined the prostaglandin production by glandular and stromal cells of pig endometrium collected on d 13 of pregnancy. Glandular cells produced more prostaglandin F2α (PGF2α) than prostaglandin …

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Effects Of Heat Stress, Dietary Energy Density And Exogenous Porcine Somatotropin On The Growth Performance Of Finishing Pigs (1989), G R. Stoner, David A. Nichols, G L. Allee, B R. Schricker, Jim L. Nelssen Jan 1989

Effects Of Heat Stress, Dietary Energy Density And Exogenous Porcine Somatotropin On The Growth Performance Of Finishing Pigs (1989), G R. Stoner, David A. Nichols, G L. Allee, B R. Schricker, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

This experiment was conducted to determine the interactive effects of environmental temperature porcine somatotropin (pST) and dietary energy density on the growth performance of finishing pigs. Forty-eight barrows were allotted randomly to four environmental chambers (EC) in a split plot design with two EClwhole plot (WP). Each EC (12 barrows/EC) represented one subplot (SP). The WP 24-h environmental cycles were: thermal neutral (TN), 8 h at 75°F and 50% relative humidity (RH)-1 h transition-14 h at 68°F and 60% RH-1 h transition; and heat stress (HS), 8 h at 95°F and 60% RH-1 h transition-14 h at 82°F and 80% …

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