scholarly journals Supplementation of grazing beef cattle with narasin

2020 ◽  
Vol 55 ◽  
Author(s):  
Luiz Guilherme Mezzena Gobato ◽  
Daniel Montanher Polizel ◽  
Marcos Vinícius de Castro Ferraz Júnior ◽  
Alexandre Arantes Miszura ◽  
José Paulo Roman Barroso ◽  
...  
Keyword(s):  
Body Weight ◽  
Block Design ◽  
Average Daily Gain ◽  
Initial Body Weight ◽  
Mineral Supplement ◽  
Protein Supplements ◽  
Randomized Complete Block Design ◽  
Daily Gain ◽  
Positive Effect ◽  
Supplement Intake

Abstract: The objective of this work was to evaluate the effect of narasin inclusion in mineral and protein supplements on the performance and supplement intake of grazing beef yearlings. One hundred and fifty Nellore yearlings with 17.0±0.06 months of age and 219.7±1.62 kg initial body weight (BW) were allocated into 30 experimental units (EUs), with five animals each. The EUs were assigned to 16 paddocks, which were continuously stocked for 28 days, followed by 28 days of rest. A randomized complete block design was used. The experiment lasted 140 days, divided into five periods of 28 days each. The assessed treatments were: control mineral supplement (CON); CON + 1,800 (N1800) or 2,750 (N2750) mg narasin per kilogram of supplement; and protein mineral supplement (PROT) or PROT + 360 mg narasin per kilogram of supplement (PROT 360). The inclusion of narasin in the mineral supplement increased average daily gain (ADG) in the first period and decreased supplement intake in the first, second, and third periods, when compared with the CON treatment. The ADG and supplement intake were similar between the N1800 and N2750 treatments. Narasin has a positive effect on ADG up to 28 days of supplementation and controls mineral supplement intake, without compromising this gain.

scholarly journals Virginiamycin and sodium monensin supplementation for beef cattle on pasture

2019 ◽  
Vol 71 (6) ◽  
pp. 1999-2008 ◽  
Author(s):  
I.C.F. Maciel ◽  
H.M. Saturnino ◽  
F.A. Barbosa ◽  
V.M.R. Malacco ◽  
J.M.C. Andrade Júnior ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Block Design ◽  
Average Daily Gain ◽  
Limiting Factor ◽  
Mineral Supplement ◽  
Randomized Block Design ◽  
Daily Dose ◽  
And Performance ◽  
Daily Gain ◽  
Supplement Intake

ABSTRACT The aim of this paper was to evaluate the effects of including virginiamycin (VM), sodium monensin (MON) or the association (VM+MON) in the energetic mineral supplement, on the intake and performance of beef cattle on pasture. Forty Nellore heifers with 24 months of age and initial body weight (BW) of 251.5±16.6kg, were distributed in four treatments in a randomized block design. Treatments consisted of adding VM, MON or VM+MON to the supplement (CONT). Additive concentrations were defined to reach a dose of 40 to 45mg/100kg BW. The herbage allowance was not a limiting factor for the animals’ intake. Supplement intake was lower than expected, with 33.0, 18.8 and 26.3mg per 100kg BW for VM, MON and VM+MON, respectively. Dry matter intake (DMI, mean=2.65% BW) and animal performance were not affected by the inclusion of additives. The average daily gain (ADG) was 0.561kg/animal day-1. The inclusion of additives in energetic mineral supplement does not affect the DMI and the ADG of grazing animals. The variability in supplement intake and daily dose intake of additives may have influenced the performance of the animals. Monensin inclusion presented the less expensive supplementation cost, due to reduction in supplement intake without changing weight gain.

PSV-21 Effects of Increasing Soybean Oil Supplementation Prior to Farrowing on Sow and Litter Performance Under Commercial Conditions

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 196-197
Author(s):  
Marley Conceição dos Santos ◽  
Uislei A Orlando ◽  
Carine M Vier ◽  
Leopoldo M Almeida ◽  
Ning Lu ◽  
...  
Keyword(s):  
Body Weight ◽  
Soybean Oil ◽  
Mixed Models ◽  
Block Design ◽  
Average Daily Gain ◽  
Model Fit ◽  
Randomized Complete Block Design ◽  
Quadratic Effects ◽  
Daily Gain ◽  
Response Variables

Abstract A total of 400 mixed parity sows (PIC Camborough, Hendersonville, TN) were used to evaluate the effects of increasing soybean oil supplementation prior to farrowing on sow and litter performance under commercial conditions. On d 111 of gestation, females were transferred to the farrowing room, blocked by parity and body weight, and allotted to one of four treatments within block in a randomized complete block design. Treatments included different amounts of soybean oil supplementation from d 111 to 113 of gestation, which included: 1) 0 g; 2) 250 g; 3) 500 g; 4) 1000 g. A corn-soybean meal-based diet containing 3.06% crude fat was fed and treatments were top-dressed at an equal amount for at least 3 d to achieve the designated supplementation level. The experimental data were analyzed using generalized linear mixed models with the GLIMMIX procedure of SAS. Polynomial contrasts were implemented to evaluate the linear and quadratic effects of increasing soybean oil supplementation. Response variables analyzed as normally distributed included sow body weight (BW) and caliper score at weaning, BW and caliper changes during lactation, piglet weight at birth, 24h after birth, and at weaning, colostrum yield, and litter average daily gain from cross-foster to weaning. Total born was analyzed following a poisson distribution and percentage born alive, stillbirth, and pre-weaning survivability were analyzed following a binomial distribution. Covariates were used if they significantly improved the model fit. Stillbirth rate increased (quadratic, P< 0.05) and percentage born alive marginally reduced (quadratic, P< 0.10) with increasing soybean oil supplementation up to 500 g, and then reduced and increased at 1000 g. There was no evidence (P >0.10) for linear or quadratic treatment effects for any of the other response variables evaluated. In conclusion, results from this study did not support supplementing increasing levels of soybean oil for sows prior to farrowing.

scholarly journals 93 Evaluation of the intake and digestibility of ensiled residual material from edamame soybean processing with and without the use of an inoculant

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 74-74
Author(s):  
Ellen M Herring ◽  
Elizabeth B Kegley ◽  
Ken Coffey ◽  
Shane Gadberry ◽  
Jeremy G Powell ◽  
...  
Keyword(s):  
Body Weight ◽  
Average Daily Gain ◽  
Adaptation Period ◽  
Processing Waste ◽  
Mineral Supplement ◽  
Dry Matter Digestibility ◽  
Body Weights ◽  
Soybean Processing ◽  
Silage Inoculant ◽  
Daily Gain

Abstract This research evaluated the effects of ensiled edamame soybean processing waste on ruminant intake and total tract digestibility. Waste from processing stored edamame was obtained (3 trips) and wilted (28%, 25%, and 37% DM), then treated with or without inoculant (Lactobacillus buchneri) and ensiled in 167 L plastic barrels (2 or 3 barrels/treatment from each trip) for 72 (Trip 1) or 69 (Trip 2 and 3) days. Pregnant ewes (n = 18; body weight = 55.5 ± 1.2 kg; 2 to 3 years old) were blocked by body weight and assigned randomly within a block to treatments within a trip, then each ewe was assigned to a barrel of silage. Ewes were housed individually in 1 × 1.5-m pens and offered silage for a 10-day adaptation period followed by 7 days of total feces and urine collection. Ewes were offered silage to allow for 10% orts and were offered 0.2% of their body weight of soyhulls and 32 g of mineral supplement/day to meet their predicted nutrient requirements for gestating ewes. Ewes consumed 1,616 ± 54 g DM/day (X ± SEM) or 2.9 ± 0.12% of their body weight and there was no effect (P ≥ 0.85) of inoculant treatment on DM intake (g/day or % of body weight). Dry matter digestibility was not affected (P = 0.98) by inoculant and averaged 55.7 ± 0.66%. Ewe average daily gain for the 17-day trial tended to be greater (P = 0.08) for the ewes offered the silage without inoculant (0.18 vs. 0.04 kg/d). Ensiling edamame processing waste yielded a feed that ewes consumed in adequate amounts to maintain their body weights over 17 days when also supplemented with soyhulls. The addition of silage inoculant had minimal effects on intake, digestibility, or ewe body weight change.

scholarly journals PSX-29 Levels of hay and narasin inclusion on carcass characteristics and meat composition

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 455-455
Author(s):  
Lairana A Sardinha ◽  
Daniel M Polizel ◽  
Alexandre A Miszura ◽  
Arnaldo C Limede ◽  
José P R Barroso ◽  
...  
Keyword(s):  
Body Weight ◽  
Block Design ◽  
Carcass Characteristics ◽  
Ash Content ◽  
Carcass Weight ◽  
Initial Body Weight ◽  
Composition Data ◽  
Meat Composition ◽  
Randomized Complete Block Design ◽  
Different Levels

Abstract The objective of this study was to determinate the effects of narasin on carcass characteristics of lambs fed a diet containing different levels. Forty-four lambs were allotted in a randomized complete block design, defined by initial body weight (BW), in a 2x2 factorial arrangement. The first factor was forage (coastcross hay) inclusion (10 or 20%, DM basis) and the second factor was narasin (0 or 13 ppm). The experimental diets were isonitrogenous (17.4%, DM basis). The experiment lasted 112 days. At the end of the experiment, the lambs were slaughtered to evaluate the carcass characteristics and meat composition. Data were analyzed using the MIXED procedure of SAS and the LSMEANS option was used to obtain the means. The effects were considered significant when P < 0.05. There was no interaction between forage levels and narasin inclusion. The experimental diets did not affect the slaughter BW (54.8 ± 1.6 kg), hot carcass weight (29.3 ± 0.96 kg), dressing percentage (53.5 ± 0.67%) and LM area (18.8 ± 0.89 cm2). The inclusion of narasin increased 12th-rib fat (2.10 vs 2.75 mm; P < 0.01) and BW thickness (16.9 vs 20.2 mm; P < 0.01). The inclusion of 20% of hay decreased BW thickness (19.21 vs 17.9 mm; P = 0.03). The experimental diets did not affect the moisture (74.2 ± 0.53%) and ash content in meat (1.27 ± 0.04%). Narasin inclusion increased the fat (2.81 vs 3.62%; P < 0.01) and decreased the CP (21.3 vs 20.7%; P = 0.02) in meat composition. The inclusion of 10% of hay increased the fat in meat (3.5 vs 2.9%; P = 0.03), however, did not affect the CP content. In conclusion, the narasin inclusion and levels of hay improve the carcass characteristics and change the meat composition.

scholarly journals Maniçoba hay or silage replaces Tifton 85 hay in spineless cactus diets for sheep

2018 ◽  
Vol 41 (1) ◽  
pp. 42553 ◽  
Author(s):  
Michel Do Vale Maciel ◽  
Francisco Fernando Ramos de Carvalho ◽  
Ângela Maria Vieira Batista ◽  
Evaristo Jorge Oliveira de Souza ◽  
Laura Priscila Araújo Amaro Maciel ◽  
...  
Keyword(s):  
Body Weight ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Neutral Detergent Fiber ◽  
Fiber Intake ◽  
Initial Body Weight ◽  
Total Carbohydrates ◽  
Manihot Glaziovii ◽  
And Performance ◽  
Daily Gain

 The aim of this study was to evaluate the replacement of Tifton 85 hay (Cynodon spp.) by maniçoba hay or silage (Manihot glaziovii Muell. Arg) on sheep intake and performance. Twenty-four male Santa Ines animals were used, with initial body weight of 19.77 ± 1.95 kg and average age of 160 days. The animals were distributed in three treatments (Tifton 85 hay-TH, Maniçoba hay-MH and Maniçoba silage-MS), arranged in a randomized blocks design, with 8 replicates per treatment. The feedlot period lasted for 71 days. The means of the variables were tested by Tukey’s test at 5% probability. Sheep fed MH presented higher dry matter intake (p > 0.05) than those fed TH (1.17 kg day-1 vs 1.06 kg day-1). Neutral detergent fiber intake was higher (p > 0.05) for MH-fed sheep (0.394 kg day-1) when compared to MS (0.340 kg day-1). The digestibility of total carbohydrates was higher (p > 0.05) for MH diet (0.71 g kg-1) than TH (0.67 g kg-1). The average daily gain and body weight at slaughter did not differ (p > 0.05) among treatments. Maniçoba hay or silage can replace Tifton 85 hay in sheep diets. 

scholarly journals Nutrient Yield of Brown Hemp and Its Utilization as Protein Source in Concentrate on Brahman×Thai-Native Cattle Performances

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Supreena Srisaikham ◽  
◽  
Pipat Lounglawan ◽  
Keyword(s):  
Animal Feed ◽  
Block Design ◽  
Average Daily Gain ◽  
Nutrient Composition ◽  
Feed Resources ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Nutrient Yield ◽  
Native Cattle ◽  
Daily Gain

Two experiments were conducted to evaluate the effects of cutting ages and height on the nutrient composition and yield of brown hemp (BH) in concentrate diets on Brahman×Thai-Native cattle performances. The first experiment was to determine the effects of cutting ages (30, 40 and 50 days) and height (30, 40 and 50 cm) on the nutrient composition and yield of BH. The experiment was a 3×3 factorial arrangement in a randomized complete block design. This study clearly showed that cutting ages at 50 days had a greater effect on the nutrient composition and yield than at 30 and 40 days, but the cutting heights did not reveal any significant differences in yield. However, the BH cutting for animal feed before plowing, besides improving the soil for green manure, also benefited feed resources. The second experiment was to study the effects of BH meal (BHM) in concentrate on Brahman×Thai-Native cattle performances. Twelve cattle, averaging 252 ± 18 kg body weight and at ages of 16-18 months were stratified randomly and assigned to one of the three feeding treatments. Cattle were fed BHM in different ratios: the treatments were 0, 10, and 20% of BHM, respectively. There were no significant differences in the dry matter intake among the treatments of 0, 10 and 20% of BHM in concentrate rations. For average daily gain, the minimum response observed was a significant difference at the highest level of 20% of BHM. Therefore, 10% of BHM can be used in the concentrate rations for beef cattle.

scholarly journals Body composition and energy and protein requirements of grazing Nelore steers

2009 ◽  
Vol 38 (7) ◽  
pp. 1347-1354 ◽  
Author(s):  
Vitor Visintin Silva de Almeida ◽  
Augusto César de Queiroz ◽  
Fabiano Ferreira da Silva ◽  
Robério Rodrigues Silva ◽  
Aline Cardoso Oliveira ◽  
...  
Keyword(s):  
Body Weight ◽  
Reference Group ◽  
Block Design ◽  
Average Daily Gain ◽  
The Body ◽  
Net Energy ◽  
Regression Equations ◽  
Protein Requirements ◽  
Animal Body ◽  
Daily Gain

This experimentwas carried out with the objective of determining the energy and protein requirements of grazing Nellore steers. Twenty four Nellore steers (average 371 ± 14 kg of BW and 26 months old) were used. Four steers were slaughtered at the beginning of the experiment (reference group), serving as a reference for the subsequent study. The remaining 20 animals were weighed and distributed in a randomized complete block design with four levels of supplementation offers: 0.0 (mineral mixture - control), 0.3, 0.6 and 0.9% BW, with five replications. The supplements, based on ground corn, soybean meal and/or urea, were previously balanced to achieve an average daily gain of 350, 650 and 850g, respectively, for the different levels of supplementation offers. The protein, fat and energy contents retained in the animal body were determined by regression equations of the logarithm of the protein, fat and energy in the animal body contents, in function of the logarithm of empty body weight (EBW). Net requirements of protein and energy for a gain of 1kg of EBW were obtained by deriving the prediction equations of the animal body content of protein, fat, or energy in function of the EBW logarithm. The net energy requirements for weight gain of Nellore steer can be obtained by the equation: NEg = 0.05764 × EBW0,75 × DEBWG0.8328. The following equation was obtained to estimate the retained protein (RP), in function of the average daily gain (ADG) and retained energy (RE): RP = 28.9199 + 85.7301 FBWG + 8.0669 RE. The net protein requirement for Nellore steers decreased as the body weight increased, with values of 174.62 and 163.10 g/kg EBG for animals of 300 and 450 kg BW, respectively.

scholarly journals PSXIV-8 Inclusion of byproducts derived from the process of corn ethanol production in finishing cattle diets

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 436-436
Author(s):  
Silvio Antunes ◽  
Djonatan Machado ◽  
Camila Delveaux Araujo Batalha ◽  
Vinícius Gouvêa ◽  
Murillo A Meschiatti ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Average Daily Gain ◽  
Latin Square ◽  
Distillers Grains ◽  
Corn Ethanol ◽  
Mineral Supplement ◽  
Finishing Cattle ◽  
Whole Cottonseed ◽  
Positive Effect

Abstract Two experiments were conducted to evaluate the performance and metabolism responses of finishing cattle to dietary inclusion of corn ethanol byproducts. All diets were isonitrogenous and contained 15% corn silage, 12% soyhulls, 0.55 to 0.85% urea and 2.25% mineral supplement. Treatments were (dry basis): Control [8% whole cottonseed, 5% soybean meal and 56.9% ground corn (GC)]; High Protein Distillers Grains (HPDG; 10.3% HPDG and 59.65% GC); Dry Distillers Grains plus Solubles (DDBS; 30% DDBS and 39.65% GC); Wet Distillers Brain plus Solubles (WDGS; 30% WDGS and 39.65% GC). In Exp. 1, 268 Nellore bulls were blocked by initial body weight (423.3 kg ± 36.6 kg), assigned to 44 pens in a randomized complete block design and fed for 110 days. Dry matter intake (DMI) tended (P = 0.058) to be greater for DDBS compared with WDBS (11.2 vs. 10.3 kg, respectively). Average daily gain was greater (P < 0.05) for DDBS compared with HPDG (1.62 vs 1.45 kg respectively) and tended (P = 0.086) to be greater for DDBS compared with control (1.62 vs. 1.48 kg respectively). Hot carcass weight was greater (P < 0.05) for DDBS compared with the other treatments (332 vs. 321 kg respectively). Feed efficiency, carcass dressing, ribeye area and back fat thickness were not affected (P > 0.05) by treatments. In Exp. 2, four rumen cannulated Nellore steers (389 ± 37 kg) were used in a 4 × 4 Latin square design. Total tract digestibility of dry matter was greater (P < 0.05) for HPDG compared with DDBS (76.8 vs. 68.5% respectively). Rumen acetate:propionate ratio was less (P < 0.01) for HPDG and DDBS (2.01) compared to control and WDBS (2.72). The greater HCW of bulls fed DDBS may be the result of its positive effect on DMI and rumen VFA profile.

scholarly journals Calcium to phosphorus ratio requirement of 26- to 127-kg pigs fed diets with or without phytase1,2

2019 ◽  
Vol 97 (10) ◽  
pp. 4041-4052 ◽  
Author(s):  
Carine M Vier ◽  
Steve S Dritz ◽  
Mike D Tokach ◽  
Joel M DeRouchey ◽  
Robert D Goodband ◽  
...  
Keyword(s):  
Block Design ◽  
Average Daily Gain ◽  
Consistent Estimate ◽  
Ratio Requirement ◽  
Carcass Yield ◽  
Bone Ash ◽  
Randomized Complete Block Design ◽  
Daily Gain ◽  
Ca:P Ratio ◽  
The Ideal

Abstract Two experiments were conducted to determine the effects of calcium to phosphorus (Ca:P) ratio in diets adequate in standardized total tract digestible (STTD) P on performance of 26- to 127-kg pigs fed diets with or without phytase. Pens of pigs (n = 1,134 in Exp. 1 and n = 1,215 in Exp. 2, initially 26.3 and 25.3 kg) were blocked by body weight (BW) and allotted to treatments in a randomized complete block design. There were 27 pigs per pen with 7 and 9 replicates per treatment in Exp. 1 and Exp. 2, respectively. Treatments were formulated to contain 0.75:1, 1.00:1, 1.25:1, 1.50:1, 1.75:1, and 2.00:1 analyzed Ca:P ratios in Exp. 1, and 0.75:1, 1.00:1, 1.25:1, 1.50:1, and 2.00:1 analyzed Ca:P ratios in Exp. 2. These correspond to a range of 0.96:1 to 2.67:1 and 0.95:1 to 2.07:1 STTD Ca:STTD P ratios in Exp. 1 and Exp. 2, respectively. Experiment 2 diets contained 1,000 phytase units of Ronozyme HiPhos 2500 (DSM Nutritional Products, Inc., Parsippany, NJ) with release values of 0.132% STTD P, 0.144% total Ca, and 0.096% STTD Ca. Diets contained 122% of NRC (2012) STTD P estimates for the weight range across 4 phases. In Exp. 1, increasing Ca:P ratio increased (quadratic, P < 0.05) average daily gain (ADG) and average daily feed intake (ADFI). Feed efficiency (G:F) worsened (quadratic, P < 0.05) at the highest ratio. Hot carcass weight (HCW) and bone ash increased (quadratic, P < 0.05) while carcass yield decreased (linear, P < 0.10) with increasing Ca:P ratio. The maximum responses in ADG, HCW, and bone ash were estimated at 1.38:1, 1.25:1, and 1.93:1 analyzed Ca:P and at 1.82:1, 1.64:1, and 2.57:1 STTD Ca:STTD P, respectively. In Exp. 2, increasing Ca:P ratio increased (quadratic, P < 0.05) ADG and bone ash, and improved G:F (linear, P < 0.05). There was a quadratic increase (P < 0.05) in HCW and decrease in carcass yield (P < 0.10). The maximum responses in ADG, HCW, and bone ash were estimated at 1.63:1, 1.11:1 to 1.60:1, and 1.25:1 analyzed Ca:P and at 1.75:1, 1.28:1 to 1.71:1, and 1.40:1 STTD Ca:STTD P, respectively. Expressing ADG on a STTD Ca:STTD P basis provided a more consistent estimate of the ideal Ca:P ratio among the 2 studies than analyzed Ca to analyzed P ratio. A STTD Ca:STTD P ratio between 1.75:1 to 1.82:1 can be used for 26- to 127-kg pigs that are fed diets adequate in STTD P with or without added phytase to maximize growth rate without reducing bone ash.

scholarly journals USE OF VIRGINIAMYCIN AND SALINOMYCIN IN THE DIET OF BEEF CATTLE REARED UNDER GRAZING DURING THE RAINY SEASON: PERFORMANCE AND RUMINAL METABOLISM

2019 ◽  
Vol 20 ◽  
Author(s):  
Sérgio Fernandes Ferreira ◽  
Juliano José de Resende Fernandes ◽  
João Teodoro Padua ◽  
Ubirajara Oliveira Bilego ◽  
Marcondes Dias de Freitas Neto ◽  
...  
Keyword(s):  
Rainy Season ◽  
Average Daily Gain ◽  
Neutral Detergent Fiber ◽  
Symbiotic Interaction ◽  
Mineral Supplement ◽  
Ruminal Ph ◽  
Dry Matter Digestibility ◽  
Biometric Measurements ◽  
Daily Gain ◽  
Supplement Intake

Abstract The rumen is the most studied organ with regard to the symbiotic interaction between host and microbiota in the digestive tract of ruminants. Thus, this study aimed at evaluating the effects of including virginiamycin and salinomycin to the supplement for cattle fed tropical grass diet during the rainy season. Three treatments were set: control - mineral supplement COMIGO - Cria 61-F2 (MS); virginiamycin - MS + virginiamycin (Phigrow (r)) 100 mg/animal/day; salinomycin - MS + salinomycin (Posistac(r)) 108 mg/animal/day for the experiment 1 (performance) and experiment 2 (ruminal metabolism). The control showed higher Mineral supplement intake (MSI) (P <0.05), the virginiamycin had higher average daily gain (ADG) (P> 0.05) and better financial efficiency. Biometric measurements showed no differences (P> 0.05), suggesting a change in the ADG composition. There was no difference (P> 0.05) for dry matter digestibility (DMDIS), acid detergent fiber digestibility (ADFDIS), ruminal pH and ammoniacal-N. The virginiamycin had the highest effective neutral detergent fiber (NDF) degradability (P> 0.05) in the passage rates of 2 and 5%; the degradability rates were similar to control treatement and higher than that of salinomycin at the rate of 8%/hour. The virginiamycin or salinomycin can be conveyed to the MS, but do not promote significant effects on ruminal pH, ammoniacal-N, DMDIS and ADFDIS; but virginiamycin promoted greater effective degradability of NDF.

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