scholarly journals PSXI-11 Comparison of once night vs. traditional twice a day feed-delivering schedule on feedlot performance of back-growing cattle in hot climate

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 377-378
Author(s):  
Ruben Barajas ◽  
Alejandro Ramos-Suarez ◽  
Billy J Cervantes-Pacheco ◽  
Bertha Chongo-García
Keyword(s):  
Feed Efficiency ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Feed Ratio ◽  
Feeding Schedule ◽  
Feedlot Performance ◽  
Hot Climate ◽  
Growing Cattle ◽  
Hot Weather ◽  
Daily Gain

Abstract In the hot-weather regions, during the hottest hours of day, cattle experienced major difficulties dissipating excessive heat load to the environment. The main source of heat production of cattle is rumen fermentation process. Changing common feeding schedule from day to night hours could help cattle easily dissipate the heat from digestive process to surrounding and impact on its performance. With the objective of comparing once-per-night vs. traditional twice-a-day feed-delivering schedule on feedlot performance of back-growing cattle in hot climate, 80 bull-calves (244.9 kg BW) were involved in a 56 feedlot experiment, performed during summer of 2018 in Culiacan, Mexico. In a complete block design experiment in groups of five were placed in 16 ground pens (6 x 12 m), and inner each block pens were randomly assigned to two treatments: 1) Feeding twice a day at 0900 and 1530 hours (Control); and 2) Feeding once a day at 2000 hours (Night treatment). In animals fed ad libitum with a growing diet, body weight, dry matter intake, average daily gain, and feed efficiency were measured. Pen (five animals) was consider as the experimental unit (8 by treatment). Results were subject to ANOVA and P < 0.05 fitted to accept statistical difference. Across experiment, maximum and minimum temperature were 44.7 and 23.6 °C, respectively; and maximum and minimum THI were 95.99 and 73.07, respectively. Night feeding schedule increased (P < 0.01) in 5% final weight, 25% daily gain, 7% dry matter intake, and 17% feed efficiency (gain: feed ratio). Results suggest that feeding time has a strong influence on feedlot performance of cattle under hot weather. It is concludes that delivering feed during the night hours becomes as a viable feeding strategy to improve feedlot performance of cattle in hot climates.

Feedlot performance, carcass characteristics, and meat characteristics of lambs grown under silvopastoral systems

2020 ◽  
Vol 100 (2) ◽  
pp. 385-388
Author(s):  
F.O.S. van Cleef ◽  
E.H.C.B. van Cleef ◽  
V.Z. Longhini ◽  
T.S. Nascimento ◽  
J.M.B. Ezequiel ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Dry Matter ◽  
Production Systems ◽  
Carcass Characteristics ◽  
Dry Matter Intake ◽  
Silvopastoral Systems ◽  
Silvopastoral System ◽  
Feedlot Performance ◽  
Daily Gain ◽  
Final Color

Crossbred lambs were grown under different production systems (unshaded, moderate shading, intense shading) and were submitted to a feedlot finishing period where the performance, efficiency, carcass characteristics, and meat characteristics were evaluated. The dry matter intake was similar among treatments as well as the daily gain and feed efficiency. Hot and cold carcass weights, their dressing percentages, initial and final carcass temperature and pH, as well as initial and final color of meat were unaffected by treatments. In conclusion, the silvopastoral system used during the growing phase neither improved feedlot performance, feed efficiency, nor carcass and meat characteristics of crossbred lambs.

Impacts of adding functional oils or sodium monensin in high-concentrate diets on performance, feeding behaviour and rumen morphometrics of finishing Nellore cattle

2020 ◽  
Vol 158 (1-2) ◽  
pp. 136-142
Author(s):  
A. C. B. Melo ◽  
M. C. S. Pereira ◽  
A. L. N. Rigueiro ◽  
D. D. Estevam ◽  
A. F. Toledo ◽  
...  
Keyword(s):  
Feeding Behaviour ◽  
Dry Matter ◽  
Feed Additives ◽  
Dry Matter Intake ◽  
Feed Ratio ◽  
State University ◽  
Feedlot Performance ◽  
Nellore Cattle ◽  
Functional Oils ◽  
Daily Gain

AbstractThis study, conducted at the São Paulo State University feedlot, Dracena campus, Brazil, was designed as a completely randomized block with 2 × 2 factorial arrangement of treatments to evaluate the effects of adding functional oils (FO) or sodium monensin (MON) on feedlot performance, carcass traits, feeding behaviour and rumen morphometrics of Nellore cattle. Ninety-six 20-mo-old Nellore bulls (365.52 ± 39.19 kg) were randomly allocated to 24 pens (n = 4/pen), which were assigned to the treatments: (1) Control (no feed additives); (2) FO (500 ppm); (3) MON (27 ppm); and (4) MON + FO (27 + 500 ppm, respectively). Each treatment was replicated 6 times, and cattle were fed for 105 days. From 0 to 28 days on feed, cattle fed FO had lower dry matter intake (DMI) variation, sorted for medium particles and presented smaller papillae width. The feeding of FO did not negatively impact feedlot performance overall. When MON was added to the diet, cattle had lower DMI overall and 12th rib fat daily gain, and improved gain to feed ratio. The addition of MON to diets improved feedlot performance but reduced the rate of carcass fat deposition. The few effects observed when FO was added to diets were not sufficient to impact feedlot performance.

scholarly journals Effects of the association between whole cottonseed and calcium salts of fatty acids on nutrient intake, feedlot performance, and carcass characteristics of Bos indicus animals offered a high-concentrate diet

2021 ◽  
Author(s):  
Leonardo R. Müller ◽  
Daniel I C. G. Gouvêa ◽  
André F. Francischinelli ◽  
Guiherme D. A. Alvarenga ◽  
Pablo C Castagnino ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Soybean Oil ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Bos Indicus ◽  
Carcass Characteristics ◽  
Dry Matter Intake ◽  
Feedlot Performance ◽  
Calcium Salts ◽  
Whole Cottonseed

Abstract This experiment evaluated the effects of feeding whole cottonseed (WC) and/or calcium salts of fatty acids (CSFA) on dry matter intake (DMI), performance, and carcass characteristics of Bos indicus animals receiving a high-concentrate diet during the finishing phase. On day 0, 96 Nellore bulls were blocked according to initial shrunk body weight (BW; 302 ± 26.7 kg) into group pens (4 animals/pen) and, within blocks, pens were randomly assigned to receive: 1) 15% of WC and 2% of CSFA [dry matter (DM) basis] of palm, cottonseed, and soybean oil (15WC; n = 6), 2) 10% of WC and 3% of CSFA (DM basis) of palm, cottonseed, and soybean oil (10WC; n = 6), 3) 5% of WC and 4% of CSFA (DM basis) of palm, cottonseed, and soybean oil (5WC; n = 6), and 4) 0% of WC and 5% of CSFA (DM basis) of palm, cottonseed, and soybean oil (0WC; n = 6). Diets were formulated to be isocaloric, isonitrogenous, and isolipidic. Experimental period lasted 108 days, whereas dry matter intake (DMI) was evaluated daily and blood samples and carcass measurements were obtained on days 0, 55, and 108 of the study. Upon slaughter on day 109, steaks were collected for determination of the chemical and fatty acid (FA) profile of the meat. No treatment effects (P ≥ 0.35) were observed on DMI, performance, average daily gain (ADG), carcass ultrasound measurements, and chemical variables of the steak. Nonetheless, including WC into the diets increased C12:0, C16:0, C16:1 trans-9, C17:0, C18:0, C18:1 cis-9, C18:2 cis-9,cis-12, C18:3 cis-9,cis-12,cis-15, saturated, and unsaturated FA intake (P < 0.01). Moreover, adding WC increased DMI fluctuation and feed efficiency (P = 0.03), but decreased marbling (P ≤ 0.03). A treatment × day interaction was observed (P < 0.01) for serum leptin concentration, as 10WC animals had greater leptin concentration on d 103 vs. other treatments (P < 0.01). Regarding steak FA profile, WC addition into the diet increased C18:2 cis-7,trans-9 and C18:3 cis-9,cis-12,cis-15 (P < 0.001), whereas saturated FA was quadratically affected (P = 0.02) and unsaturated FA was reduced for 15WC (P < 0.04). In summary, increasing levels of CSFA into isolipidic finishing diets containing WC did not negatively impact feedlot performance, but reduced feed efficiency and increased marbling scores of Bos indicus bulls, demonstrating its feasibility as a technology to improve carcass traits of low-marbling animals.

scholarly journals PSXIV-34 Encapsulated nitrate on performance of growing Nellore bulls under grazing system during the dry season

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 431-432
Author(s):  
Cibelle B Figueiredo ◽  
Mauricia B Silva ◽  
Juliano Fernandes ◽  
Alana M Calaça ◽  
Higor Rocha ◽  
...  
Keyword(s):  
Body Weight ◽  
Ammonium Nitrate ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Dry Season ◽  
Dry Matter Intake ◽  
Calcium Ammonium Nitrate ◽  
Randomized Design ◽  
Daily Gain

Abstract The aim of this trial was to evaluate the effect of encapsulated calcium ammonium nitrate as a partial substitute for soybean meals in the concentrate dry matter intake, average daily gain and feed efficiency of Nellore young bulls under grazing conditions, during the dry season. Sixty-four weaned Nellore (initial BW = 177.46±3.77 kg and 9 mo old) were used in a completely randomized assay. The study lasted 84 days on the dry season. Animals were allotted into 16 paddocks of 1.0 ha each of Urochloa brizantha, randomly assigned into one of two treatments: (CTL) supplement with 25% CP, without nitrate inclusion and; (ENP): supplement with 25% CP, with a inclusion of 50 g of encapsulated calcium ammonium nitrate to each 100 kg of body weight. Animals were fed with concentrate at 1.0% of body weight. Concentrate offered was monitored daily as well as his refusals were collected and weighed to determine daily concentrate dry matter intake (DMI) and feed efficiency (F:G). Animals were weighed every 28 d for calculating average daily gain (ADG). Data were analyzed as a completely randomized design, using ANOVA (α = 0.05). No effects of treatments (P > 0.3487) were observed for final BW (246.69 kg). The same for concentrate dry matter intake (P > 0.0550). Animals consumed 2.34 kg of supplement per day. The average daily gain (0.832 kg, P > 0.2649) and feed efficiency (0.356 kg, P > 0.7315) were not affected by the inclusion of nitrate. The inclusion of encapsulated calcium ammonium nitrate in supplement to Nellore young bulls under grazing conditions during the growing phase did not affect the performance.

scholarly journals Effects of steroidal implants on feedlot performance, carcass characteristics, and serum and meat estradiol-17β concentrations of Holstein steers

2019 ◽  
Vol 4 (1) ◽  
pp. 206-213 ◽  
Author(s):  
Pedro Henrique Vilela Carvalho ◽  
George A Perry ◽  
Tara L Felix
Keyword(s):  
Feed Efficiency ◽  
Animal Health ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Feed Ratio ◽  
Longissimus Muscle ◽  
Feedlot Performance ◽  
Trenbolone Acetate ◽  
Daily Gain ◽  
Estradiol 17Β

Abstract The objectives of the study were to determine the effect of steroidal implants on growth performance, carcass characteristics, and estradiol-17β (E2) concentrations in the blood and longissimus muscle of Holstein steers fed a grain-based diet. Seventy Holstein steers (average initial BW = 275 ± 6.4 kg, 10 to 12 mo of age) were assigned to treatments: (i) implanted with 80 mg of trenbolone acetate (TBA) and 16 mg of E2 (Component TE-IS with Tylan; Elanco Animal Health, Greenfield, IN) at the start of the trial (day 0), and reimplanted with 120 mg of TBA and 24 mg of E2 (Component TE-S with Tylan; Elanco Animal Health) on day 84 of the experiment; or (ii) no implant. Implanted Holstein steers were heavier (P ≤ 0.01) than nonimplanted Holstein steers in the middle (day 84) and at the end of the experiment (day 186). Implanting Holstein steers increased (P < 0.01) average daily gain (ADG) and dry matter intake (DMI) without affecting gain-to-feed ratio compared with nonimplanted animals. Carcasses from implanted Holstein steers had greater (P < 0.01) hot carcass weight (HCW) and longissimus muscle (LM) area than carcasses from nonimplanted steers. Implanting did not affect (P ≥ 0.21) other carcass characteristics. There was an increase (P = 0.03) of 1.3 pg of E2/g of muscle in implanted Holstein steers compared with that from nonimplanted Holstein steers. There was an implant × day interaction (P < 0.01) in serum E2 concentrations. Serum E2 concentrations were not altered in nonimplanted Holstein steers, whereas E2 concentration increased (P < 0.01) after steers were implanted, regardless of implant characteristics. Serum E2 peaked at 28 days after the first implant and then rapidly declined after day 56. In summary, steroidal implants administered on days 0 and 84 increased DMI, ADG, HCW, and LM area in Holstein steers compared with nonimplanted steers due to increased serum E2 concentrations. However, these changes did not improve feed efficiency or other carcass characteristics.

Use of triticale silage in diets for growing steers

1992 ◽  
Vol 72 (1) ◽  
pp. 181-184 ◽  
Author(s):  
D. R. ZoBell ◽  
L. A. Goonewardene ◽  
D. F. Engstrom
Keyword(s):  
Key Words ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Barley Grain ◽  
Dry Matter Intake ◽  
High Moisture ◽  
Key Words Barley ◽  
Barley Silage ◽  
Daily Gain

A total of 120 steers were fed either barley silage (BS) or triticale silage (TS) combined with barley (B) or high-moisture barley (HMB) grain, as a total mixed ration in a 2 × 2 factorial design with three replications. The barley and triticale yields were 9.8 and 8.7 t ha−1, respectively. No differences (P > 0.05) in weight, average daily gain, dry matter intake or feed efficiency were observed for treatments or interactions. TS can be used to replace BS at moderate levels in growing steer rations containing barley grain. Key words: Barley, triticale, silage, steers, performance

MONENSIN, CHLORTETRACYCLINE AND TYLOSIN EFFECTS ON PERFORMANCE AND DIGESTION IN LAMBS FED A GROUND ALFALFA DIET

1989 ◽  
Vol 69 (2) ◽  
pp. 505-508 ◽  
Author(s):  
Z. MIR
Keyword(s):  
Key Words ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Control Diet ◽  
Average Daily Gain ◽  
Neutral Detergent Fiber ◽  
Dry Matter Intake ◽  
Acid Detergent Fiber ◽  
Finishing Diets ◽  
Daily Gain

Supplementing a control diet of ground alfalfa (CON) with monensin (MON), chlortetracycline (CTC) or tylosin (TYL) did not affect (P < 0.05) dry matter intake or average daily gain of market lambs. Feed efficiency with CTC was less than with the unsupplemented control (CON) (6.22 vs. 5.68) (P < 0.05). Mean digestibilities of dry matter, acid detergent fiber and neutral detergent fiber were lower (P < 0.05) with all antibiotic treatments than the CON diet. Relative to CON, nitrogen digestibility was increased with MON (66.3 vs. 70.9%) while that of energy was reduced with TYL (P < 0.05). Rumen ammonia and acetic, propionic and butyric acid concentrations were not influenced by any of the treatments. MON, CTC and TYL were not effective supplements for lambs fed alfalfa finishing diets. Key words: lamb, chlortetracycline, monensin, tylosin, alfalfa hay, digestibility

scholarly journals Effects of processing a new low acid-detergent lignin hull, high oil groat oat cultivar (CDC SO-I) on performance of growing cattle

2010 ◽  
Vol 90 (2) ◽  
pp. 271-274 ◽  
Author(s):  
J J McKinnon ◽  
A M Walker ◽  
B G Rossnagel ◽  
P G Jefferson ◽  
H A Lardner ◽  
...  
Keyword(s):  
Key Words ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Dry Matter Intake ◽  
Animal Performance ◽  
Treatment Results ◽  
Acid Detergent Lignin ◽  
Growing Cattle ◽  
Negative Effect ◽  
Daily Gain

A new oat cultivar, CDC SO-I, with a low lignin hull and high oil groat was evaluated in backgrounding diets for steer calves, with an emphasis on the requirement for processing. Average daily gain was not different (P > 0.05) between calves fed rolled barley, rolled oat, or whole oat diets. Dry matter intake of cattle fed the rolled oat diet was greater (P = 0.04) than that of cattle fed the rolled barley or whole oat diets. Feed:gain was not affected (P = 0.13) by treatment. Results indicate the CDC SO-I oat does not require processing (i.e., rolling), and can replace barley in backgrounding diets with no negative effect on animal performance. Key words: Oat, growing cattle, feedlot, high oil, low lignin

scholarly journals PSVIII-4 Live growth performance of Jersey steers using an aggressive implant strategy

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 304-304
Author(s):  
Tylo J Kirkpatrick ◽  
Sierra L Pillmore ◽  
Kimberly Cooper ◽  
Travis Tennant ◽  
Ty Lawrence
Keyword(s):  
Growth Performance ◽  
Repeated Measures ◽  
Fixed Effects ◽  
Dry Matter ◽  
Mixed Model ◽  
Average Daily Gain ◽  
Dry Matter Intake ◽  
Repeated Measure ◽  
Feed Ratio ◽  
Daily Gain

Abstract This experiment was designed to study the effect of days on feed and an aggressive implant strategy on Jersey steer growth performance. Steers (n = 30; start of trial body weight (BW) 183 ± 43 kg) were randomly assigned to one of two treatments; negative control (CON) or implanted with Revalor 200 every 70 d (REV; d 0, d 70, d 140, d 210, d 280, d 350) for a total of 6 implants. Steers were weighed every 35 d and daily feed delivery was recorded daily. Data for dry matter intake (DMI) and gain to feed ratio (G:F) were analyzed via a mixed model; the fixed effects were day and treatment. Live growth BW and average daily gain (ADG) used day as the repeated measure and animal as the subject in a repeated measures analysis. Change in BW increased linearly (P &lt; 0.01); treatments differed in BW from d 280 through d 350 (P &lt; 0.01). Average daily gain decreased (P &lt; 0.01) linearly and differed (P &lt; 0.01) at d 70, d 140, d 280, and d 350, but not (P ≥ 0.10) at d 210 or d 420. Dry matter intake was greater (P &lt; 0.05) for REV steers (7.6 kg/d) than CON (6.8 kg/d). Gain to feed ratio did not differ (P ≥ 0.78) between CON steers (0.13 kg/kg dry matter (DM)) and REV (0.14 kg/kg DM) steers, yet G:F differed (P &lt; 0.01) amongst periods (d 70 = 0.21 kg/kg, d 140 = 0.16 kg/kg, d 210 = 0.15 kg/kg, d 280 = 0.13 kg/kg, d 350 = 0.08 kg/kg, d 420 = 0.08 kg/kg). Aggressively implanting Jersey steers improved growth performance by 9.6%, 13.2%, 11.3%, and 7.7% for BW, ADG, DMI, and G:F, respectively.

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