EFFECT OF THE FEED ADDITIVES CHLORTETRACYCLINE, MONENSIN AND LASALOCID ON FEEDLOT PERFORMANCE OF FINISHING CATTLE, LIVER LESIONS AND TISSUE LEVELS OF CHLORTETRACYCLINE

1988 ◽  
Vol 68 (4) ◽  
pp. 1131-1141 ◽  
Author(s):  
S. E. BEACOM ◽  
G. O. KORSRUD ◽  
W. D. G. YATES ◽  
J. D. MacNEIL ◽  
Z. MIR
Keyword(s):  
Dry Matter ◽  
Average Daily Gain ◽  
Feed Additives ◽  
Dry Matter Intake ◽  
Beef Steers ◽  
Liver Lesions ◽  
Finishing Cattle ◽  
Acid Ratio ◽  
High Forage ◽  
Forage Diets

Charolais-sired, three way cross steers and heifers (n = 209) were fed ground high-forage diets for 56 d and then were finished on rolled grain based diets. Both diets were supplemented with chlortetracycline (CTC), monensin (MON) or lasalocid (LAS). Cattle fed the high-forage diets supplemented with MON or CTC gained faster (P < 0.05) than those fed an unsupplemented (CON) diet. Dry matter intake was also increased (P < 0.05) by CTC over animals fed the CON diet. Feed efficiency was not affected by CTC but was improved over CON by supplementation with MON or LAS. During the high-concentrate feeding period, inclusion of feed additives did not significantly improve average daily gain or dry matter intake when compared with CON. Of the carcass characteristics, only carcass weight was greater (P < 0.05) and only with CTC supplementation. Monensin and LAS inclusion significantly decreased the acetic to propionic acid ratio in rumen contents. There was no evidence that the incidence of liver lesions differed among the treatments. Analyses of liver, muscle and kidney samples from 61 animals fed CTC and 14 animals fed the CON diet produced no repeatably detectable traces of CTC. Averaged across sex and weight group, returns to labor per animal were $25.83, $61.46, $48.52 and $41.10 for the CON, CTC, MON and LAS treatments, respectively. Key words: Chlortetracycline, monensin, lasalocid, beef steers, heifers, tissue residue

Effects of dietary urea concentration on performance and health of receiving cattle and performance and carcass characteristics of finishing cattle

2003 ◽  
Vol 83 (3) ◽  
pp. 569-575 ◽  
Author(s):  
G. C. Duff ◽  
K. J. Malcolm-Callis ◽  
M. L. Galyean ◽  
D. A. Walker
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Urea Concentration ◽  
Optimum Level ◽  
Beef Steers ◽  
Finishing Cattle ◽  
Finishing Diets ◽  
Sorghum Grain

Effects of urea concentration for receiving and finishing cattle were examined. In exp.1, 197 newly received beef steers (188 kg) were used, and treatments included 0, 0.5, or 1.0% urea [dry matter (DM) basis] in a 70 or 75% concentrate (steamflaked corn-based) diet. A quadratic response (P < 0.05) was observed for dry matter intake (DMI) of concentrate and total DMI during days 0 to 14 with DMI lower for 0.5% urea. A quadratic (P < 0.10) increase in gain:feed for 0.5% urea was noted during days 15 to 28 and days 0 to 28. Urea concentration did not affect bovine respiratory disease (BRD) morbidity. In exp. 2, 235 yearling beef steers (379 kg) and 126 yearling beef heifers (346 kg) were used to evaluate 0, 0.5, 1.0, 1.5, or 1.75% urea concentrations in a steam-flaked sorghum grain-based diet. Average daily gain (ADG) (1.44, 1.48, 1.51, 1.47, and 1.43 kg for 0, 0.5, 1.0, 1.5 or 1.75% urea, respectively), DMI (9.4, 9.3, 9.6, 9.4, kg and 9.2 for 0, 0.5, 1.0, 1.5 or 1.75% urea, respectively), and gain:feed (0.153, 0.160, 0.157, 0.157, and 0.157 for 0, 0.5, 1.0, 1.5 or 1.75% urea, respectively) did not differ (P > 0.10) among treatments for the overall experiment. No major differences were noted for carcass characteristics. Optimum level of dietary urea for newly received beef cattle fed 70 to 75% concentrate diets is approximately 0.5% of the DM for maximum feed efficiency and added urea concentrations did not alter performance or carcass characteristics to a great extent with steam-flaked sorghum grain-based finishing diets. Key words: Beef cattle, urea, health, performance, carcass quality

COMPARISON OF SILAGES FROM DENSELY SEEDED AND CONVENTIONALLY SEEDED CORN FOR BEEF STEERS

1986 ◽  
Vol 66 (2) ◽  
pp. 431-439 ◽  
Author(s):  
J. W. G. NICHOLSON ◽  
G. BELANGER ◽  
P. L. BURGESS
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Productivity Loss ◽  
Dry Matter Intake ◽  
Beef Steers ◽  
Vitamin Supplement ◽  
Seeding Rate ◽  
And Performance ◽  
Daily Gain

Corn for silage was planted at two seeding rates (60 000 and 200 000 kernels ha−1) in three consecutive years and evaluated by determining yields, digestibility by sheep and performance of growing-fattening beef cattle fed the ensiled crops. Plant populations at harvest ranged over years from 53 000 to 63 000 plants ha−1 for conventional seeding and from 94 000 to 151 000 plants ha−1 for the dense seeding rate. Dense seeding increased whole-plant dry matter yield each year. Only in 1 year (1979) did dense seeding reduce the yield of dry matter in the whole ear or grain (P < 0.01). In the same crop year (1979) dense seeding reduced the dry matter and crude protein contents of the silage (P < 0.01) and the digestibilities by sheep of the dry matter and nitrogen were lower (P < 0.01) than for the conventionally seeded crop. In 2 years (1978 and 1979), when the silages were fed ad libitum with only a protein-mineral-vitamin supplement, the daily silage dry matter intake by beef cattle was lower (P < 0.01 or P < 0.05) and in 1979 the average daily gain (1.06 vs. 1.14 kg d−1) was lower (P < 0.01) with silage from the dense seeding. There were no significant differences in beef performance parameters (silage dry matter intake, daily gain, and efficiency of silage conversion to daily gain) in the third year when the silages were fed with ground barley. Dense seeding of corn for silage resulted in more beef production per hectare and provides a means of reducing productivity loss due to birds feeding on the ripening ears of corn. Key words: Corn, silage, beef, dense seeding, seeding rate

scholarly journals Short-Term Eating Preference of Beef Cattle Fed High Forage or High Grain Diets Supplemented with 3-Nitrooxypropanol

Animals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 64 ◽  
Author(s):  
Chanhee Lee ◽  
Seon-Ho Kim ◽  
Karen Beauchemin ◽  
Pietro Celi ◽  
Stéphane Duval
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
The Other ◽  
Dry Matter Intake ◽  
Feed Consumption ◽  
Beef Steers ◽  
Short Term ◽  
Enteric Methane ◽  
Consumption Rates ◽  
High Forage

Two experiments were conducted to examine eating preference of beef cattle for diets with or without the investigative enteric methane inhibitor 3-nitrooxypropanol (3-NOP). Nine beef steers were housed in individual stalls, each equipped with two feed bunks. The first experiment (Exp. 1) was conducted with a high forage diet and each animal received a diet without 3-NOP (CON) in one bunk and a diet with 3-NOP (dNOP) in the other bunk. The second study (Exp. 2) was conducted with the same animals about 6 months after Exp. 1 where a high grain diet without (CON) or with 3-NOP (dNOP) was offered. In Exp. 1, animals initially preferred CON compared with dNOP. Feed consumption from 0 to 3, 3 to 6, and 6 to 12 h after feeding was lower for dNOP compared with CON. However, dry matter intake (DMI) and feed consumption of dNOP gradually increased during Exp. 1 such that there was no preference between CON and dNOP on day 7. In Exp. 2, there was no preference for or against dNOP. Average DMI was greater for dNOP vs. CON, but interactions between diet and day for DMI and feed consumption rates indicated that daily preference between CON and dNOP was variable. In conclusion, beef steers initially detected a difference between CON and dNOP and selected in favor of CON rather than dNOP when they had not previously been exposed to 3-NOP. However, the animals rapidly acclimatized to a diet with 3-NOP (Exp. 1) and showed no eating preference between CON and dNOP within 7 days. This lack of preference was maintained throughout Exp. 2 when the same animals were fed a high grain diet.

1346 Effect of narasin on rumen metabolism and dry matter intake in wethers fed high-forage diets

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 650-650 ◽  
Author(s):  
D. M. Polizel ◽  
M. F. Westphalen ◽  
A. A. Miszura ◽  
M. H. Santos ◽  
R. G. Silva ◽  
...  
Keyword(s):  
Dry Matter ◽  
Dry Matter Intake ◽  
Rumen Metabolism ◽  
High Forage ◽  
Forage Diets

scholarly journals PSXI-14 Effects of pen cleaning on feedlot performance and carcass characteristics of beef steers fed during the winter in the northern Great Plains

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 388-388
Author(s):  
Bryan W Neville ◽  
Rebecca L Moore ◽  
Wayde J Rodehorst
Keyword(s):  
Great Plains ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Dry Matter Intake ◽  
Northern Great Plains ◽  
Beef Steers ◽  
Marbling Score ◽  
Final Body Weight ◽  
Quality Grade ◽  
Similar Density

Abstract The objective of this study was to evaluate the impacts of winter pen cleaning on livestock performance of beef cattle fed to finish in the Northern Great Plains. One hundred fifty-six mixed-breed beef steers (284 ± 14 kg) were assigned to one of 12 pens. Treatments were assigned randomly to pen and consisted of: 1) Control - no cleaning, 2) Apron - bunk aprons (approximately 3 m behind the bunk) cleaned twice throughout the study, and 3) Full - entirety of the pen cleaned twice throughout the study. Full pens or bunk aprons were cleaned on two occasions at 56-day intervals. Pens were stocked at a similar density, approximately 26.9 m2 of pen space per steer. Steers were adapted to and finished a common finishing diet. Cattle were provided fresh bedding weekly, with an estimated 2.5 kg cereal straw·steer−1·d−1 used as bedding during the study. Pen cleaning did not influence (P ≥ 0.48) final body weight (628 ± 12 kg), or average daily gain (1.8 ± 0.03 kg/d). Dry matter intake (10.6 ± 0.24 kg) and feed efficiency (0.167 kg gain:kg dry matter intake) were similar (P ≥ 0.55) across treatment. Hot carcass weight, ribeye area, back fat and yield grade of carcasses were not affected (P ≥ 0.44) by pen cleaning treatment. Increasing extent of pen cleaning increased marbling score (P = 0.03; 444, 463, and 484 ± 11.1 for control, apron, and full, respectively). Quality grade was greater (P &lt; 0.05) in carcasses resulting from steers managed with either pen cleaning strategy compared to control. Further, increasing extent of pen cleaning increased (P = 0.03) quality grade of carcasses. Pen cleaning did not improve animal performance in this study, which was unexpected. Further research on the accumulation of marbling over time with different pen cleaning systems is warranted.

303 Effects of Supplementing Plexomin Zn™ on Post-transit Growth Performance and Plasma Zn and Serum Lactate Concentrations of Beef Steers

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 163-163
Author(s):  
Katie J Heiderscheit ◽  
Stephanie L Hansen
Keyword(s):  
Body Weight ◽  
North America ◽  
Repeated Measures ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Serum Lactate ◽  
Dry Matter Intake ◽  
Experimental Unit ◽  
Beef Steers ◽  
Daily Gain

Abstract To determine effects of supplemental Zn on post-transit growth and plasma Zn and serum lactate concentrations, 54 Angus-cross steers (297 kg ± 12) were stratified by body weight to nine GrowSafe-equipped pens. Treatments began 25 d prior to transit and included: control (CON; no supplemental Zn), industry (IND; 70 mg supplemental Zn/kg DM), and supranutritional Zn (SUPZN; 120 mg supplemental Zn/kg DM). Supplemental Zn was provided as bis-glycinate bound Zn (Plexomin Zn; Phytobiotics North America, Cary, NC). On d 0, steers were loaded into a commercial trailer and transported 18 h (1,822 km). Individual BW were recorded on d -26, -25, -1, 0 (pre-transit), 1 (post-transit), 6, 27, and 28. Blood was collected on d -1, 1, 6, and 28. Data were analyzed using Proc Mixed of SAS with fixed effect of diet and steer as the experimental unit (n = 18 steers per treatment). Blood measures were analyzed as repeated measures with the repeated effect of day. Percent of pre-transit dry matter intake (DMI) was calculated relative to DMI for the 5 days prior to transit. Plasma Zn concentrations were greater in IND and SUPZN than CON (P = 0.01) and were greater on d 1 than d -1, 6, and 27 (P &lt; 0.01). By d 2, both IND and SUPZN returned to pre-transit DMI levels while CON did not (P = 0.01). Further, DMI from d 1 to 28 was greatest in IND, intermediate in SUPZN, and least in CON (P = 0.04). Average daily gain from d 6 to 28 linearly improved with increasing Zn supplementation (P = 0.02). Regardless of treatment, serum lactate concentrations were greater post-transit compared to pre-transit values (P = 0.02). Steers supplemented dietary Zn recovered DMI faster and had greater ADG after a transit event.

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