scholarly journals 235 Effects of cottonseed hulls and bermudagrass hay particle size on dry matter intake, physiological parameters, and growth performance of feedlot lambs

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 174-175
Author(s):  
Danilo G Quadros ◽  
Travis R Whitney ◽  
Cassie Weishuhn ◽  
Jose M Diaz ◽  
Douglas R Tolleson
Keyword(s):  
Particle Size ◽  
Blood Serum ◽  
Growth Performance ◽  
Dry Matter ◽  
Rumen Fluid ◽  
Physiological Parameters ◽  
Dry Matter Intake ◽  
Repeated Measure ◽  
Randomized Design ◽  
Feedlot Lambs

Abstract A randomized design trial was used to evaluated effects of cottonseed hulls (CSH) and bermudagrass hay (BGH) particle size in feedlot diets fed to female Rambouillet lambs (n = 10/treatment) on dry matter intake (DMI), physiological parameters, and growth performance. After 14 days of adaptation, lambs were individually fed 80% concentrate diets during two distinct 21-d periods with either CSH or BGH as the roughage source, respectively. Diets were identical except for the roughage particle size (3/8, 1/4, or 3/16-inch hammermill screens); control diets contained unground CSH or course-ground BGH. Data were analyzed by period using a model including treatment as main effect and animal as repeated measure. No differences in initial and final BW were observed. Lamb DMI (g/d) did not vary (P > 0.10) among the different particle sizes. However, there was a linear decrease (P = 0.007) in DMI as a percentage of BW when CSH particle size increased, while no difference was observed for BGH (P > 0.55). Rumen fluid pH was not affected by roughage particle size (P > 0.19) in either Period. No differences (P > 0.10) in rumen fluid FAs concentration were observed related to CSH despite a quadratic trend (P = 0.07) in acetate concentration. Total VFA (P = 0.01), acetate (P = 0.008), and propionate (P = 0.04) concentrations in ruminal fluid from lambs fed diets containing BGH quadratically increased, while butyrate linearly decreased (P = 0.03). There was a trend for a quadratic increase (P = 0.09) in blood serum ammonia when CSH particle size increased. Blood serum urea during both periods and ammonia during Period 2, did not vary with roughage particle size. Results suggested that particle size is dependent upon type of roughage. Generally, in high concentrate lamb feedlot diets a course particle size (3/8” screen) is recommended.

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 < 0.01); treatments differed in BW from d 280 through d 350 (P < 0.01). Average daily gain decreased (P < 0.01) linearly and differed (P < 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 < 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 < 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.

scholarly journals Foraging behaviour and dry matter intake by lambs in a silvopastoral system

2021 ◽  
Vol 8 (II) ◽  
Author(s):  
Silvia López-Ortiz ◽  
Viviana Valenzuela-Gonzalez ◽  
Efrain Pérez-Ramírez ◽  
Mónica de la Cruz Vargas-Mendoza ◽  
Jesús Jarillo-Rodríguez ◽  
...  
Keyword(s):  
Dry Matter ◽  
Live Weight ◽  
Metabolizable Energy ◽  
Dry Matter Intake ◽  
Repeated Measure ◽  
Silvopastoral System ◽  
Randomized Design ◽  
Nutritive Quality ◽  
Digitaria Eriantha ◽  
Foraging Time

Dry matter intake, nutritional contribution of forage to the diet and Lamb foraging behavior were assessed in a silvopastoral system. Twelve Pelibuey female lambs (6.3 months of age, 23.74 ± 3.5 kg live weight), were randomly assigned to two treatments: pastures of Digitaria eriantha (monoculture) or pastures of D. eriantha and Guazuma ulmifolia (silvopastoral). During a 15 day period, lambs foraged individually in 20.14 m2 paddocks each day; time spent grazing and browsing were assessed by scan sampling; dry matter intake was estimated (day 11-15), using the chromic oxide (Cr2O3) method, and metabolizable energy (ME) and protein (CP) ingested by the lambs were estimated. Data analyses were performed using a complete randomized design (dry matter intake) and a repeated-measure design (ME and CP, foraging time) with factorial treatment structure of season (windy and dry) and pasture (monoculture and silvopastoral). Voluntary intake  (season*treatment interaction, p = 0.015) was lower in the windy-silvopastoral  treatment (448.5±38.2 g day-1) than in the other treatments (625.8±38.2 to 680.5±38.2 g day-1). The contribution of ME (719.7-1190.2 kcal·day-1) and CP (53.7-100.7 g day-1) was low to cover the lamb requirements in all treatments, because forage availability and dry matter intake were low. Lambs dedicated from 6.65±0.26 to 7.50 ± 0.26 h to foraging; time spent grazing was longer that browsing in the silvopastoral system (p < 0.0001). The time dedicated to foraging, intake, and nutritive quality of forage from in both pasture types did not provide nutrients and energy during any season for maintenance of the lambs.

53 Relationships Between Fecal Characteristics, Ruminal Ph, Intake and Digestion in Feedlot Cattle

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 153-154
Author(s):  
Chessa Brown ◽  
Kaylie Huizenga ◽  
Joshua C McCann
Keyword(s):  
Particle Size ◽  
Dry Matter ◽  
Feedlot Cattle ◽  
Dry Matter Intake ◽  
Particle Sizes ◽  
Ruminal Ph ◽  
Rumen Ph ◽  
Randomized Design ◽  
Fecal Ph ◽  
Relationship Of

Abstract The objectives were to: 1) determine the relationship of fecal characteristics with ruminal pH, dry matter intake (DMI) and dry matter digestion and 2) determine the ability of fecal characteristics to predict ruminal pH, DMI, and dry matter digestion. Data were collected in two metabolism studies using eighteen ruminally cannulated steers (n = 36). Each study was a completely randomized design evaluating the effect of a direct-fed microbial during an acidosis challenge. Ruminal pH, DMI, total tract DM digestion and fecal characteristics (fecal pH, washed fecal particle size and mucin casts) were measured for 4 d after the acidosis challenge. Rumen pH was not correlated (P ≥ 0.15) with mucin cast score or mean fecal particle size but was negatively associated with fecal pH (r = -0.42; P &lt; 0.01). Total tract DM digestion was correlated (r ≥ 0.53; P ≤ 0.02) to fecal pH and fecal particle sizes between 1180 and 2360 µm. Dry matter intake was correlated (r ≥ 0.41; P &lt; 0.01) to mean fecal particle size and fecal particle sizes between 2360 and 4750 µm. Multiple regressions were performed with the GLMSELECT procedure of SAS 9.4 using stepwise selection. Ruminal pH was best predicted (r2 = 0.20) by fecal pH and fecal particle size between 1400 and 1700 µm. Total tract DM digestion was best predicted (r2 = 0.92) by fecal pH, mucin cast score, and fecal particle size between 3350 and 1700 µm. Dry matter intake was best predicted (r2 = 0.51) by mean fecal particle size, fecal pH and fecal particle size between 1400 and 850 µm. Overall, results indicated fecal pH was correlated to ruminal pH and total tract DM digestion. Fecal characteristics including washed particle size can also predict total tract DM digestion in feedlot cattle.

PSI-12 Effects of increasing rumen propionate on dry matter intake, feeding behavior, glucose clearance, and insulin response in cattle on a finishing ration

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 275-275
Author(s):  
Abigail R Rathert ◽  
Hunter L McConnell ◽  
Carlee M Salisbury ◽  
Nick Uzee ◽  
Dagan Montgomery ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Plasma Glucose ◽  
Dry Matter ◽  
Treatment Time ◽  
Rumen Fluid ◽  
Random Effect ◽  
Insulin Response ◽  
Dry Matter Intake ◽  
Repeated Measure ◽  
Glucose Clearance

Abstract The objective of this experiment was to determine if increasing propionate alters dry matter intake (DMI), feeding behavior, glucose clearance rate, blood metabolites, insulin concentrations, and rumen fluid lactate in steers fed a finishing diet. Ruminally cannulated Holstein steers (n = 6) were fed a finishing diet ad libitum. Steers were randomly assigned to one of three treatments in a 3×6 Latin rectangle design. Treatments of no Ca propionate (CON), 100 g/d (LOW), or 300 g/d (HIGH) were ruminally dosed daily. Individual DMI was measured using an Insentec feeding system. Weekly blood samples and body weight were collected on d 0, 7, and 14 and analyzed for glucose, lactate, NEFA, and insulin. A glucose tolerance test was conducted on d 14 of each period. Data were analyzed using a mixed model with period, treatment, time, and their interaction included, with time within period as a repeated measure, and steer as a random effect. Dry matter intake, meal size, and number of meals per day were decreased (P &lt; 0.049) in HIGH steers. Weekly plasma glucose tended (P = 0.07) to be greater on d 7 than d 0. Plasma insulin was lower (P = 0.019) in both LOW and HIGH than CON steers. Rumen fluid lactate was decreased (P = 0.034) in HIGH steers. There was an effect of time (P &lt; 0.0001) on rumen fluid lactate and pH, with an increase from 0 h to 6 h. There was no treatment effect (P ≥ 0.11) on weekly plasma glucose, NEFA, or lactate, rumen fluid pH, or glucose peak concentration, plateau, and rate. These data indicate that increased propionate may decrease DMI and alter feeding behavior but might not be related to glucose metabolism.

scholarly journals Evaluasi Pertambahan Bobot Badan Sapi Aceh Jantan yang Diberi Imbangan Antara Hijauan dan Konsentrat di Balai Pembibitan Ternak Unggul Indrapuri

2013 ◽  
Vol 13 (2) ◽  
pp. 41-46 ◽  
Author(s):  
Yunasri Usman ◽  
Eka Meutia Sari ◽  
Nuzul Fadilla
Keyword(s):  
Body Weight ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Analysis Data ◽  
The Body ◽  
Dry Matter Intake ◽  
Anova Analysis ◽  
Randomized Design ◽  
Daily Gain ◽  
Research Analysis

The evaluation of the Aceh cattle bulls weight which compensated between forage and concentrate at Superior Livestock Place in IndrapuriABSTRACT. This research was conducted at Superior Livestock Place in Indrapuri District, Aceh Besar  which lasted for 42 days. It was started on November 28th 2012 until January 9th 2013. This research was aims to know about the average daily gain for Aceh cattle bulls which compensated between forage and concentrate by using 12 bulls aged 2-2,5 years old. The design was used a Randomized Design Groups with 4 feed treatments and 3 repetitions. The feed percentages between forage and concentrate are ration A (100% forages), B (80%)forages and 20% concentrates), C (60% forages and 40% concentrates), and D (40% forages and 60% concentrates). The research analysis data were obtained by using ANOVA (Analysis of Variance). The parameters which observed in this study was the average daily gain, consumption, conversion, and efficiency rations. The result showed that the ration dry matter intake highly significantly (P0,01) between treatment A (4,45 Kg), and B (3,61 Kg), C (2,72 Kg), and D (3,38 Kg), but the treatment B and D highly significantly than treatment C (P0,01), the best ration consumption were derived from treatment C. The body weight Kg/bull/day significantly (P0,05) between treatment A (0,47 Kg) and B (0,65 Kg), C (0,60 Kg), and D (0,61 Kg), the best average daily gain were derived from treatment B. The conversion ration showed that highly significantly (P0,01) between treatment A (9,55 Kg), and B (5,55 Kg), C (4,60 Kg), and D (5,59 Kg), the best ration conversion were derived treatment C. Similarly, the efficiency ration showed that highly significantly (P0,01) between treatment A (0,11%), and B (0,18%), C (0,22%), and D (0,18%), C is the best ration efficiency on the treatment.

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 &gt; 0.3487) were observed for final BW (246.69 kg). The same for concentrate dry matter intake (P &gt; 0.0550). Animals consumed 2.34 kg of supplement per day. The average daily gain (0.832 kg, P &gt; 0.2649) and feed efficiency (0.356 kg, P &gt; 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 Non-structural carbohydrates in the nutrition of high-yielding dairy cows during a transition period

2010 ◽  
Vol 55 (No. 11) ◽  
pp. 468-478 ◽  
Author(s):  
K. Poláková ◽  
V. Kudrna ◽  
A. Kodeš ◽  
B. Hučko ◽  
Z. Mudřík
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Dry Matter ◽  
Rumen Fluid ◽  
Live Weight ◽  
Dry Matter Intake ◽  
Control Group ◽  
Maize Starch ◽  
Milk Performance

The main aim of this study was to investigate experimentally the effect of different composition of non-structural carbohydrates (NFC) in prepartum feed rations administered to high-yielding dairy cows at a high concentration of NFC in the diet on dry matter intake both before and after parturition and on subsequent milk performance, body condition and physiological traits of rumen fluid and blood. Thirty-six high-yielding dairy cows were allocated into one of the three well-balanced groups (K, O, and C), and each group received a different feeding rations. Feeding rations differed in non-structural carbohydrate (NFC) structure. The "K" (control) group received a feeding ration with NFC in the form of maize starch in particular, while the feeding rations of the other two (experimental) groups contained either (besides maize starch) saccharose from dried sugar beet (the "O" group) or a dominant amount of NFC was in the form of saccharose (the "C" group). After calving, all dairy cows were given the same feeding ration from the first day after parturition. The experiment was conducted for 21 days before and 50 days after calving. FR in the form of total mixed ration was offered ad libitum. Dry matter intake, milk performance, body condition, live weight, and blood and rumen parameters were recorded for the duration of the experiment. Average daily dry matter intake before calving was highest in the "K" group (14.32 kg per head). Differences among groups were statistically significant (P &lt; 0.05). Prepartum dry matter consumption dropped as the rate of saccharose in the diet of cows increased. Dry matter consumption levelled off after calving. Milk yield was also highest in the "K" group (43.71 kg/head/day), but fatness of milk and thus the production of fat corrected milk were lowest in this group. The highest milk fat content (4.10%) and fat corrected milk production (44.03 kg/head/day) were recorded in the "C" group, whereas the highest milk protein concentration was found in the milk of the "O" group. The composition of NFC affected dry matter intake before parturition, but these concentrations did not significantly affect dry matter intake, milk yield, milk composition, live weight, body condition or blood serum and rumen fluid parameters after calving

scholarly journals Feeding Response of Tree Fodder Bhimal (Grewia optiva) on Growth Performance of Castrated Male Goats

2017 ◽  
Vol 3 ◽  
pp. 1-5
Author(s):  
Luma Nidhi Pandey ◽  
Megh Raj Tiwari ◽  
Bishnu Bahadur KC ◽  
Niraj Baskota ◽  
Jagan Nath Banjade
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Dry Matter ◽  
Live Weight ◽  
Dry Matter Intake ◽  
Free Access ◽  
Experimental Animals ◽  
Mixture Treatment ◽  
Grewia Optiva ◽  
Concentrate Mixture

Bhimal (Grewia optiva) is a fodder tree mostly found in mid hills of mid and far western region of Nepal. Bhimal could constitutes one of the main livestock green fodders, especially for goats when fresh green fodder become limited during the winter dry season. However, the feeding value of Bhimal leaves on growth performance of castrated goats probably has not been evaluated so far. Therefore, an experiment was conducted to evaluate the effect of Bhimal leaves feeding on growth performance of castrated male goats for 90 days. Altogether 16 growing castrated male goats of same breed, age and body weight were selected and equally divided into four treatments T1, T2, T3 and T4 with four replications by using Completely Randomized Design (CRD). Four types of experimental diets were prepared having various levels (0 to 100%) of Bhimal leaves as fodder. Experimental animals of Treatment 1 were fed with seasonal fodder + 100 g concentrate mixture, Treatment 2 with 100% Bhimal fodder + 100 g concentrate mixture, Treatment 3with 75% Bhimal fodder + 25% seasonal fodder + 100 g concentrate mixture, while Treatment 4 with 50% Bhimal fodder + 50% season fodder + 100 g concentrate mixture. All diets were fed ad-lib and experimental animals had free access to drinking water. The diets offered and refusal was measured daily and weight change was observed fortnightly. The result showed that fodder intake (g/d/animal) and total dry matter intake (TDMI g/kg live weight) of goats differed significantly (P<0.01), but concentrate intake was not differed significantly (P<0.01) among treatments. The highest dry matter intake per animal /day was in Treatment 2 (52.75 g/kg live weight) followed by Treatment 4, Treatment 3 and Treatment 1 (51.7, 48.56 and 32.69 g/kg live weight, respectively).The average daily gain in body weight was observed highest in Treatment 2 (66.66 g/d) followed by Treatment 3 (31.66 g/d) and Treatment 4 (30.83 g). The growth rate was significantly (P<0.01) different among diet groups (P<0.05, P<0.01 and P<0.01 for 60, 75 and 90 days, respectively). In case of the feed conversion ratio, Treatment 2 had best ratio (8.79:1) than Treatment 1 (14.21:1), T3 (17.03:1) and Treatment 4 (18.59:1). The present response study showed that body weight in castrated male goats can be increased significantly (P<0.05) implying that in winter season when other green forages are poorly available goat farming  can be supported by Bhimal fodder tree.Journal of Nepal Agricultural Research Council Vol.3 2017: 1-11

Effects of feeding different levels of chromium-enriched live yeast in hairy lambs fed a corn-based diet: effects on growth performance, dietary energetics, carcass traits and visceral organ mass

2013 ◽  
Vol 53 (4) ◽  
pp. 308 ◽  
Author(s):  
A. Estrada-Angulo ◽  
Y. S. Valdés ◽  
O. Carrillo-Muro ◽  
B. I. Castro-Perez ◽  
A. Barreras ◽  
...  
Keyword(s):  
Growth Performance ◽  
Dry Matter ◽  
Carcass Traits ◽  
Dry Matter Intake ◽  
Longissimus Muscle ◽  
Visceral Organ ◽  
Muscle Area ◽  
Organ Mass ◽  
Different Levels ◽  
Live Yeast

Forty Pelibuey × Kathdin lambs (35.5 ± 0.4 kg) were used in a 56-day feeding experiment to assess the effects of feeding different levels of chromium-enriched live yeast (Cr-YC) on growth performance, dietary energetics, carcass traits and visceral organ mass. The Cr-YC source contained 5.5 × 109 colony forming units (CFU) and 0.40 mg of Cr per gram. Treatments consisted of a dry rolled corn-based finishing diet supplemented with 0, 1, 2 or 3 g Cr-YC/lamb.day. Total daily dosages were: 5.5 × 109 CFU and 0.4 mg; 1.1 × 1010 CFU and 0.8 mg Cr, and 1.65 × 1010 CFU and 1.2 mg Cr for supplementation levels of 1, 2 or 3 g Cr-YC/lamb.day, respectively. There were no treatments effects on dry matter intake. As the level of Cr-YC supplementation increased, average daily gain, gain to feed and dietary net energy were linearly increased, and observed/expected dry matter intake was linearly decreased. Chromium-enriched live yeast supplementation increased empty bodyweight (EBW), gastrointestinal fill and full viscera weight, but did not influence organ weights as a proportion of EBW (g/kg EBW). Cr-YC level did not affect carcass length, backfat thickness, kidney, pelvic and heart fat or body wall thickness, but increased hot carcass weight and longissimus muscle area. In general, treatment effects on percentage yield of wholesale cuts (tissue weight as a percentage of cold carcass weight) were small. However, Cr-YC decreased percentage flank. Chromium-enriched yeast supplementation enhances growth rate, longissimus muscle area, and dietary energetic efficiency in finishing feedlot lambs.

scholarly journals PSXIV-17 Effects of corn bran plus solubles and corn oil on growth performance and carcass traits of finishing bulls

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 436-437
Author(s):  
Arquimedes Lima Junior ◽  
Murillo A Meschiatti ◽  
Vinicius N Gouvêa ◽  
Victor Dantas ◽  
Daniel Silva Antonelo ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Corn Oil ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Dry Matter Intake ◽  
Final Body Weight ◽  
Finishing Diets

Abstract The objective of this study was to evaluate the growth performance and carcass traits of finishing bulls fed diets containing, on dietary dry matter basis, different levels of corn wet distillers bran plus solubles (WDBS; 0, 15, 30 or 45%) added with or without corn oil (CO; 0 and 3%). A total of 205 Nellore bulls (390 ± 25 kg initial BW) were blocked by initial body weight, distributed in 40 pens and pens within weight block were randomly assigned to treatments in a 2 × 4 factorial arrangement. Diets were isonitrogenous and contained 8.5% sugarcane bagasse and 91.5% concentrate (ground corn, soybean meal, pelleted citrus pulp, urea, mineral). The WDBS (FlexyDDG®) and the corn oil were from SJC Bioenergia (Quirinópolis, Goiás, Brazil). Data were analyzed using the PROC MIXED procedure of SAS. An interaction between CO × WDBS levels was observed for dry matter intake (DMI; P = 0.032). In diets without CO, increasing levels of WDBS linearly (P = 0.004) reduced the DMI, but in diets containing 3% CO, increasing levels of WDBS quadraticaly affected the DMI (P = 0.002). No effects of CO, WDBSF levels or CO × WDBS levels were observed for final body weight, average daily gain, hot carcass weight and dressing percentage. Feed efficiency tended (P = 0.07) to be greater for bulls fed diets containing CO (0.154 vs. 0.144). Increasing levels of WDBS tended (P = 0.09) to increase the feed efficiency. In summary, increasing levels of WDBS in finishing diets linearly (in diets without CO) or quadratically (in diets with CO) reduces the dry matter intake. Adding CO and WDBS tend to increase feed efficiency.

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