0251 Natural dry matter intake fluctuation impacts performance, feeding behavior and rumen morphometrics of feedlot cattle: 10 yr of data assessment

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 119-120 ◽  
Author(s):  
G. D. Cruz ◽  
I. C. Pereira ◽  
D. D. Millen ◽  
M. D. Arrigoni ◽  
C. L. Martins ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Dry Matter ◽  
Feedlot Cattle ◽  
Dry Matter Intake ◽  
Data Assessment

scholarly journals Optimum roughage proportion in barley-based feedlot cattle diets: growth performance, feeding behavior, and carcass traits

2020 ◽  
Vol 98 (10) ◽  
Author(s):  
Karen M Koenig ◽  
Gwinyai E Chibisa ◽  
Gregory B Penner ◽  
Karen A Beauchemin
Keyword(s):  
Feeding Behavior ◽  
Growth Performance ◽  
Dry Matter ◽  
Carcass Traits ◽  
Barley Grain ◽  
Feedlot Cattle ◽  
Experimental Unit ◽  
Finishing Diets ◽  
Ruminal Acidosis ◽  
Barley Silage

Abstract High grain diets are fed to finishing beef cattle to maximize animal performance in a cost-effective manner. However, a small amount of roughage is incorporated in finishing diets to help prevent ruminal acidosis, although few studies have examined optimum roughage inclusion level in barley-based diets. The objective of the study was to evaluate the effects of roughage proportion in barley-based finishing diets on growth performance, feeding behavior, and carcass traits of feedlot cattle. Crossbred beef steers (n = 160; mean body weight ± SD, 349.7 ± 21.4 kg) were allocated to 20 pens that were assigned randomly to four dietary treatments (five pens of eight steers per treatment). The treatment diets contained barley silage at 0%, 4%, 8%, and 12% of dietary dry matter (DM). The remainder of the diets (DM basis) consisted of 80%, 76%, 72%, and 68% barley grain, respectively, 15% corn dried distiller’s grains, 5% mineral and vitamin supplement, and 32 mg monensin/kg diet DM. The diets were fed as total mixed rations for ad libitum intake (minimum of 5% refusal) once per day. Cattle were weighed on 2 consecutive days at the start and end of the experiment and on 1 d every 3 wk throughout the experiment (124 d). Two pens for each treatment group were equipped with an electronic feeding system (GrowSafe Systems Ltd., Calgary, Alberta) to monitor feed intake and feeding behavior of individual cattle. The data for dry matter intake (DMI), average daily gain (ADG), gain:feed (G:F) ratio, and carcass traits were analyzed as a completely randomized design with fixed effect of barley silage proportion and pen replicate as experimental unit. Feeding behavior data were analyzed similarly, but with animal as experimental unit. Averaged over the study, DMI increased linearly (11.1, 11.3, 11.7, 11.8 kg/d; P = 0.001) as barley silage proportion increased from 0%, 4%, 8%, and 12% of DM, but ADG was not affected (carcass-adjusted,1.90, 1.85, 1.87, 1.89 kg/d; P ≥ 0.30). Consequently, G:F ratio decreased linearly (carcass-adjusted, 168.9, 163.8, 158.5, 160.6 g/kg DMI; P = 0.023). When averaged over the study, proportion of barley silage in the diet had no linear or quadratic effects (P > 0.10) on meal frequency, duration of meals, intermeal duration, or meal size, but eating rate decreased linearly with increasing silage proportion (P = 0.008). There was no diet effect on liver abscesses (P ≥ 0.92), and effects on carcass characteristics were minor or nonexistent. We conclude that increasing the proportion of barley silage in a feedlot finishing diet at the expense of barley grain to minimize the incidence of ruminal acidosis may decrease feed conversion efficiency.

scholarly journals OreganoExtract Added into the Diet of Dairy Heifers Changes Feeding Behavior and Concentrate Intake

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Giovani Jacob Kolling ◽  
Dejani Maíra Panazzolo ◽  
Alexandre Mossate Gabbi ◽  
Marcelo Tempel Stumpf ◽  
Marcel Batista dos Passos ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Dry Matter ◽  
Statistical Difference ◽  
Dry Matter Intake ◽  
Control Group ◽  
Latency Time ◽  
Negative Effects ◽  
Dairy Heifers ◽  
And Performance ◽  
Saliva Production

This experiment aimed to describe the effects ofOreganoextract (OE) inclusion into the concentrate fed to dairy heifers on physiological parameters, feeding behavior, intake, and performance. Thirty-two Holstein heifers were randomly distributed into four treatments: C = control, without addition of OE; OE2.5 = 2.5 g; OE5.0 = 5.0 g and OE7.5 = 7.5 g ofOreganoextract per heifer/day. Feeding behavior and concentrate intake were assessed individually every day and total dry matter intake (DMI) was determined on the last week of the trial. Compared to control group, OE7.5 reduced by 32% the latency time to approach the feed bunk but increased by 6% the time spent eating the concentrate. Each inclusion of 2.5 grams of OE into the concentrate increased the occurrence of postingestive licking the feed bunk with abundant saliva production 1.2 times (P<0.01) and tended to increase the occurrence of sneeze events 1.2 times (P<0.10). No statistical difference was detected between treatments for total DMI, but concentrate DMI was 9% lower for OE7.5 when compared to control and OE2.5. The inclusion of 7.5 grams/day of OE causes small but negative effects in feeding behavior and concentrate intake, without change on total dry matter intake.

scholarly journals PSI-14 Feeding β-agonists under heat stress conditions in feedlot cattle

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 266-266
Author(s):  
Pablo C Grijalva ◽  
Rachel Reith ◽  
Renae L Sieck ◽  
Rebecca Swanson ◽  
Ty B Schmidt ◽  
...  
Keyword(s):  
Heat Stress ◽  
Dry Matter ◽  
Feedlot Cattle ◽  
Stress Conditions ◽  
Dry Matter Intake ◽  
Environment Interaction ◽  
Experimental Conditions ◽  
Feedlot Steers ◽  
Zilpaterol Hydrochloride ◽  
Red Angus

Abstract Red Angus steers (n = 24; 260 ± 25 kg) were used to analyze the effects of supplementation of zilpaterol hydrochloride (ZH) under heat stress conditions on respiration rate (RR), rectal temperature (RT), growth performance (GP), and carcass traits (CT). Steers were randomly assigned to a 2 x 2 factorial treatment arrangement (n = 6/group) with factors including heat stress (HS; THI=71 to 83) or thermal neutral (TN; THI=27 to 39) conditions and with/without supplementation of ZH (0 or 8.38 mg/kg/d on 88% DM basis). Steers were provided 9 d to acclimate to tie stalls rooms under TN conditions before starting the study. TN steers were pair-fed to the average daily dry matter intake (DMI) of HS steers. Ad libitum water consumption (WC) was recorded daily. HS and TN steers were harvested on d 22 and 23, respectively. By design, DMI was not different between environments (P = 0.43). DMI also did not differ between supplement groups (P = 0.31). RT, RR, and WC were greater (P &lt; 0.01) in HS steers compared to TN steers. There was a supplement by environment interaction (P = 0.02) for RT, as HS steers fed ZH had lower RT than HS control steers (39.1 vs 39.5 ℃). ADG was 20% higher (P = 0.04) in HS steers compared to TN steers. CT did not differ (P = &gt;0.05) due to environment, treatment, or interactions between environment and ZH supplementation. Our results suggest that feedlot steers under our experimental conditions display some sensitivity to HS through GP, RR, and RT, however, this did not translate to an impact on CT. Furthermore, ZH supplementation under HS conditions appears to impact thermoregulatory responses positively, yet this did not impact GP or CT.

scholarly journals PSXIV-22 Impact of fibrolytic enzymes on performance, metabolism, and feeding behavior of feedlot cattle fed diets containing different levels and sources of roughage

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 435-436
Author(s):  
Ludmila de Souza Monteiro ◽  
João Vitor Pessoa Fiório ◽  
Jéssica Olivier Da Silva ◽  
Daniel Silva Antonelo ◽  
Nicola Walker
Keyword(s):  
Feeding Behavior ◽  
Dry Matter ◽  
Block Design ◽  
Latin Squares ◽  
Feedlot Cattle ◽  
Net Energy ◽  
Performance Study ◽  
Volatile Fatty Acid Concentration ◽  
Randomized Complete Block Design ◽  
Metabolism Study

Abstract Two experiments were conducted to evaluate finishing performance, carcass characteristics, total tract diet digestibility, ruminal parameters, and feeding behavior of bulls fed high-concentrate feedlot diets containing two sources and two levels of roughage, with or without exogenous fibrolytic enzyme (EFE). For the performance study, 264 Nellore bulls (371 ± 18.7 kg) were distributed in 48 pens by initial body weight in a randomized complete block design with a 2 × 2 × 2 factorial treatment arrangement. Diets contained (dry matter basis) 0 or 0.75 mL/kg of EFE (ABVista, Marlborough, UK); and 8.5 or 12.5% either sugarcane bagasse (SCB) or grass hay (GH). Dry matter intake was greater for bulls fed 12.5% roughage (P &lt; 0.01) and for treatments fed GH (P = 0.01), but gain:feed was greater with 8.5% roughage (P &lt; 0.01) and tended to be greater for SCB (P = 0.07). Observed net energy concentrations were greater for 8.5% roughage (P &lt; 0.01) and for SCB (P = 0.04). For the metabolism study, 8 ruminally cannulated Nellore steers (396 ± 1.4 kg) were assigned to 2 simultaneous 4 × 4 Latin Squares. Digestibility of crude protein was greater for steers fed 8.5% roughage compared to those fed 12.5% (P = 0.01), and supplementing EFE tended to increase digestibility of acid detergent fiber (P = 0.10). Volatile fatty acid concentration was lower (P = 0.04) and intake time tended to be greater (P = 0.07) with 12.5% dietary roughage compared to 8.5%. Supplementing EFE to feedlot cattle fed diets containing either SCB or GH, and either 8.5 or 12.5% roughage yielded no improvements in animal performance, but led to minor changes in digestibility and ruminal parameters.

scholarly journals PSI-4 Effect of rumen protected capsaicin on dry matter intake, average daily gain, and carcass characteristics in finishing beef cattle

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 290-290 ◽  
Author(s):  
John C Eidsvik ◽  
John J McKinnon ◽  
Diego Moya Fernandez ◽  
Alexandra Blanchard
Keyword(s):  
Dry Matter ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Feedlot Cattle ◽  
Dry Matter Intake ◽  
Canola Meal ◽  
High Dose ◽  
Marbling Score ◽  
Mineral Supplement ◽  
Dressing Percentage

Abstract The objective was to evaluate growth performance and carcass characteristics for feedlot cattle fed two sources of rumen protected capsaicin at two dose rates. A total of 450 steers, stratified by BW, were assigned into 30 pens. Pens were randomly assigned to receive 1 of 5 treatments containing (DM basis) of 86.2% barley grain, 6.0% barley silage, 6.2% canola meal, and 1.6% vitamin and mineral supplement. Treatments contained no additive (CON) or included a low or high dose of Nexulin (100 mg/d for NEXLO and 330 mg/d for NEXHI) or CapsXL (77 mg/d CAPLO or 250 mg/d for CAPHI). Steers averaged 507 kg BW at the start of the study and 686 kg at the end of the study (69 days on feed) with no differences among treatments (P &gt; 0.28). Dry matter intake, ADG, gain:feed, dressing percentage, backfat thickness, and rib-eye area were not affected by treatment (P &gt; 0.33). Steers fed CAPLO and NEXLO tended (P = 0.07) to have lesser marbling scores than CON, CAPHI and NEXHI. The proportion of steers in Canadian yield grades 1 and 2 did not differ among treatments, while those in yield grade 3 were greater (P = 0.03) in NEXLO (29%) than the CON (10.0%) and NEXHI (12.2%) treatments, with those fed CAPLO (20%) and CAPHI (19%) being intermediate but not different. Treatment did not affect the proportion of steers in quality grades B4, A, or prime, but tended to increase the proportion of steers grading AAA (P = 0.08) and decrease the proportion grading AA (P = 0.06). Overall, the data from this experiment suggest the potential for capsaicin to affect carcass yield grade, marbling score and quality grades without affecting DMI, ADG, or dressing percentage.

Feeding behavior and dry matter digestibility in sheep fed first and second cut reed canary grass (Phalaris arundinacea L.)

2019 ◽  
Author(s):  
N. Tokita, ◽  
I. Yoshimura ◽  
T. Tokita
Keyword(s):  
Feeding Behavior ◽  
Crude Protein ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Growth Stages ◽  
Reed Canary Grass ◽  
Eating Time ◽  
Dry Matter Digestibility ◽  
Canary Grass ◽  
Female Sheep

We investigated the intake and digestibility of different reed canarygrass (RCG) growth stages by sheep. RCG was cultivated in an experimental field and harvested at the first and second cuts at each pre-blooming stage. Feeding behavior was monitored on adult female sheep, fed 3 kg each of fresh RCG three times daily. While the crude protein content and dry matter digestibility of RCG were significantly higher in leaf than in stem tissue of both first and second cut in harvesting times, neutral and acid detergent fiber contents were higher in stem than in leaf. The dry matter intake of RCG at the second cut (296.1g) was significantly higher than at the first cut (214.1 g). The eating time for consumption of RCG on dry matter at the second cut (54.9 min) was shorter than at the first cut (69.4 min). Consequently, at the second cut, the rate of biting (54.6 bites/min) was lower than at the first cut (64.8 bites/min). Bite size, expressed as dry matter intake per bite, ranged from 0.05 g at first cut to 0.10 g at second cut.

373 The Effects of Estrus on Dry Matter Intake and Feeding Behavior in Beef Heifers.

2018 ◽  
Vol 96 (suppl_2) ◽  
pp. 200-201
Author(s):  
S R Underdahl ◽  
A B P Fontoura ◽  
L L Hulsman Hanna ◽  
K A Vonnahme ◽  
K C Swanson ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Beef Heifers

scholarly journals PSXIV-36 Effect of corn variety and amylase enzyme on cattle performance and carcass characteristics

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 434-434
Author(s):  
Renan Regatieri Casagrande ◽  
Terry Engle ◽  
John Wagner
Keyword(s):  
Energy Source ◽  
Body Weight ◽  
Dry Matter ◽  
Carcass Characteristics ◽  
Feedlot Cattle ◽  
Dry Matter Intake ◽  
Net Energy ◽  
Longissimus Muscle ◽  
Marbling Score ◽  
Muscle Area

Abstract Four hundred and thirty-three Angus and Angus cross-bred steers (Body Weight 344 ± 13.3 kg) were utilized in this experiment to compare different varieties of grain corn and α-amylase enzyme on feedlot cattle performance and carcass characteristics. Steers were blocked by body weight and breed and randomly assigned to treatments. Treatments consisted of: 1) Commercial commodity corn (CON); 2) Experimental test corn (TEST;), 3) 50:50 blend of CON and TEST corn sources (BLEND), and 4) CON with 5g of α-amylase enzyme added/hd/d (AMZ; Amaize®, Alltech). Steers were slaughtered after 138 days on feed. Feedlot performance, net energy recovery, hot carcass weight, dressing percentage, subcutaneous adipose tissue depth, longissimus muscle area, marbling score, and calculated yield grade data were analyzed as a randomized complete block design using PROC MIXED of SAS. Dietary treatment had no effect (P &gt; 0.20) on BW, average daily gain, feed efficiency, or net energy recoveries. There was a tendency for daily dry matter intake (DMI) to be influenced by treatment: d 0 – d 90 (P &lt; 0.09), d 91 – slaughter (P = 0.11), and d 0 – slaughter (P &lt; 0.08). Dry matter intake was consistently greater for steers receiving the AMZ treatment when compared to all other treatments. Daily DMI for the TEST treatment was consistently lower than DMI for all other treatments. Hot carcass weight (P = 0.56), dressing percentage (P = 0.10), 12th subcutaneous fat depth (P = 0.88), longissimus muscle area (P = 0.84), yield grade (P = 0.91), marbling score (P = 0.76), quality grade (P = 0.67), and the distribution of USDA yield and quality grades (P &gt; 0.74) were similar across treatments. These results indicate the value of the TEST corn as an energy source in feedlot cattle diets is similar to the value of COM corn an energy source.

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