Digestive parameters during gestation of Holstein heifers

AbstractOur objective was to estimate nutrient intake, ruminal flow, total apparent and ruminal digestibility, rates of passage and digestion, ruminal and omasal pH, blood metabolite concentrations, and body measurements during gestation of Holstein heifers. Eleven pregnant Holstein heifers, 8 of which fitted with a rumen cannula (450 ± 27.6 kg of body weight and 20 ± 3.5 months of initial age) were used. All heifers received the same diet composed of corn silage, soybean meal, corn meal, minerals and vitamins, with a corn silage:concentrate ratio of 50:50 (on a dry matter basis), aiming an average daily gain of approximately 1.0 kg. The sampling periods were established according to the days of gestation: 145, 200, and 255 with a duration of 10 days per period. Total fecal samples were collected to estimate dry matter, organic matter, crude protein, and neutral detergent fiber digestibility. Blood samples were collected to analyze metabolites (non-esterified fatty acids, β-hydroxybutyrate, urea, and glucose). Data were analyzed as a repeated measurements scheme, using MIXED procedure, with differences declared when P < 0.05. Dry matter intake expressed in kg/day increased from d-145 to d-200, and remaining stable until d-255 of gestation. The same results were observed for organic matter and crude protein intake, increasing 15.0 and 35.8% respectively. In contrast, when dry matter intake was evaluated as % body weight, we observed a decrease of 16.7% from d-200 to d-255. Days of gestation did not influence ruminal flow of dry matter, organic matter, crude protein, and neutral detergent fiber. We observed an increase in the ruminal digestibility of neutral detergent fiber by 20.5%. The apparent total-tract digestibility of dry matter, organic matter, and crude protein changed over days of gestation, with an increase of 11.9, 8.5, and 9.8%, respectively, when comparing d-145 with d-200. The rate of digestion of neutral detergent fiber increased from 2.0 to 3.5% h-1. Glucose levels decreased, while β-hydroxybutirate and non-esterified fatty acids increased from d-145 to d-255. In conclusion, our results demonstrate a reduction in dry matter intake in % body weight due to pregnancy. It also shows an increase in total apparent digestibility through gestation, which imply a greater efficiency of use of nutrients by pregnant animals. Thus, further research is still needed to consolidate such results and to elucidate the mechanism about nutrient usage during the final third of gestation in heifers.

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Intake and digestibility of crossbred goats finished on caatinga grassland receiving feed supplementation during dry season

Revista Brasileira de Saúde e Produção Animal ◽

10.1590/s1519-99402016000300014 ◽

2016 ◽

Vol 17 (3) ◽

pp. 484-496 ◽

Cited By ~ 1

Author(s):

Daniel Cézar da SILVA ◽

Adriana GUIM ◽

Gladston Rafael de Arruda SANTOS ◽

Evaristo Jorge de Oliveira SOUZA ◽

Stela Antas URBANO ◽

...

Keyword(s):

Body Weight ◽

Organic Matter ◽

Crude Protein ◽

Dry Matter ◽

Average Daily Gain ◽

Substitution Effect ◽

Ether Extract ◽

Final Body Weight ◽

Feed Supplementation ◽

Total Carbohydrates

SUMMARY It was evaluated the effect of feed supplementation at 0.4; 0.8 and 1.2% of body weight (BW) on intake and digestibility of crossbred goats finished on caatinga, in relation to crossbred goats not supplemented (0.0% of BW). Thirty-two crossbred, Anglo-Nubian goats were used, eight months old and with body weight of 18 ± 2.5 kg, organised into randomised blocks, which were kept on 37 hectares of caatinga from 7 h to 16 h. Intake of dry matter, organic matter, crude protein, ether extract, neutral and acid detergent fibre, total carbohydrates and total digestible nutrients was influenced (P<0.05) by the levels of feed supplementation, with linear increases of 202.31; 179.42; 25.05; 11.83; 35.79; 12.27; 142.63 and 166.79 g animal-1 day-1 respectively. There was a substitution effect (P<0.05) on dry matter intake when using feed supplementation at 0.7% BW. Feed supplementation resulted in positive linear effect (P<0.05) for digestibility of dry matter, organic matter, crude protein, ether extract, total carbohydrates, total digestible-nutrient content and digestible energy, with an increase of 17.15; 16.64; 19.07; 44.74; 15.15 and 17.56% for dry matter, and 0.69 Mcal kg-1 of dry matter respectively. Final body weight, total gain and average daily gain, showed a linear increase (P<.005) of 2.60, 3.09 and 0.036 kg per percentage point of each additional level of supplement. Feed supplementation increases the intake and digestibility of total dry matter and nutrients, a fact that makes greater performance possible, and recommends use up to a level of 0.7% BW to avoid any substitution effect.

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Increasing levels of concentrate digestibility, performance and ingestive behavior in lambs

Revista Brasileira de Saúde e Produção Animal ◽

10.1590/s1519-99402016000200006 ◽

2016 ◽

Vol 17 (2) ◽

pp. 186-194 ◽

Cited By ~ 3

Author(s):

Henrique Nunes PARENTE ◽

Michelle de Oliveira Maia PARENTE ◽

Ruan Mourão da Silva GOMES ◽

Wesclley de Jesus dos Santos SODRÉ ◽

Miguel Arcanjo MOREIRA FILHO ◽

...

Keyword(s):

Crude Protein ◽

Dry Matter ◽

Block Design ◽

Average Daily Gain ◽

Protein Digestibility ◽

Neutral Detergent Fiber ◽

Ingestive Behavior ◽

Dry Matter Intake ◽

Gross Margin ◽

Dry Matter Digestibility

SUMMARY The objectives of this research were to determine the effects increasing levels of concentrate on nutrients digestibility, performance, economic viability of diets and ingestive behavior of lambs. Fifteen crossbred lambs were used in a randomized complete block design according to initial body weight and age. Lambs were penned individually during 55 days, being 10 days for adaptation of diets and 45 days for data collection. The treatments consisted in three isonitrogenous diets with increasing levels of concentrate: 40, 60, or 80%, in dry matter basis. No effect (P>0.05) were observed on dry matter intake, crude protein intake, crude protein digestibility and neutral detergent fiber digestibility, whereas the dry matter digestibility was lower (P<0.01) for lambs fed diets with 40% of concentrate. The addition of 80% concentrate decreased (P<0.05) neutral detergent fiber intake, however this treatment provided higher average daily gain, followed by 60 and 40% of concentrate. In relation to feeding behavior, the animals fed80% concentrate spent more time with feeding (P<0.05) compared to the other treatments. It is concluded that supplementation of concentrate between 60 to 80% improves dry matter digestibility and performance of crossbred lambs without relevant affect dry matter intake and ingestive behavior. A diet with 80% concentrate provides positive gross margin of profit.

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Intake, digestibility and performance of lambs fed with diets containing cassava peels

Ciência e Agrotecnologia ◽

10.1590/s1413-70542014000300010 ◽

2014 ◽

Vol 38 (3) ◽

pp. 295-302 ◽

Cited By ~ 5

Author(s):

Gilmara Santos Guimarães ◽

Fabiano Ferreira da Silva ◽

Luciano Lemos da Silva ◽

Luísa Miranda Girardi Galvão ◽

Lenon Machado dos Santos ◽

...

Keyword(s):

Body Weight ◽

Dry Matter ◽

Average Daily Gain ◽

Neutral Detergent Fiber ◽

Dry Matter Intake ◽

Feed Conversion ◽

Final Body Weight ◽

Linear Effect ◽

And Performance ◽

Cassava Peel

Sheep farming is designated to economic exploitation, and dry matter intake is the most important factor that influences the performance of animal, thus seeking alternative foods. This study aimed to evaluate the effects of inclusion levels of cassava peel on intake, digestibility and performance of feedlot lambs. We used 32 crossbred lambs Santa Inês uncastrated, mean body weight of 21 ± 1.5 kg. Treatments were arranged in a randomized design to animals, with inclusion levels of cassava peel (0, 10, 20, 30%) in the diet dry matter and forage cassava leaf hay. During 70 days, there have been weighing the food provided, leftovers, and animals, and feces collection. The intake of dry matter (DMI), organic matter (OMI), crude protein (CPI), ether extract (EEI), neutral detergent fiber corrected for ash and protein (NDIap), total carbohydrates (CTI), non-fiber carbohydrates (NFCI), total digestible nutrients (TDNI), as well as DMI and NDFap/kgCP, DMI and NDFIap/PC0.75 levels have not been affected by the inclusion of cassava peel. Similar results for DM digestibility, NDF, CP, MO, CT and the TDN. DEE had a growing linear effect whereas DNFC presented a quadratic effect. Average daily gain (ADG), feed conversion (FC), initial body weight (BWinitial), final body weight (BWfinal), warm carcass weight (WCW) and warm carcass yield (WCR) showed no changes. It is concluded that the peel cassava may be included in diet until 30%, without change dry matter intake and animal performance.

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Efficacy of sheep as a digestibility model for cattle when fed concentrate-based or forage-based diets

Translational Animal Science ◽

10.1093/tas/txz092 ◽

2019 ◽

Vol 3 (4) ◽

pp. 1106-1111

Author(s):

Ghazanfar A Chishti ◽

Pedro H V Carvalho ◽

Ana Carolina Pinto ◽

Flavia A S Silva ◽

Tara L Felix

Keyword(s):

Body Weight ◽

Organic Matter ◽

Dry Matter ◽

Random Effect ◽

Neutral Detergent Fiber ◽

Starch Digestibility ◽

Dry Matter Intake ◽

Acid Detergent Fiber ◽

Cattle Feeding ◽

Acceptable Model

AbstractThe objectives were to determine the efficacy of sheep as a digestibility model for cattle feeding two diets, forage or concentrate based, under current genetics. Twelve Suffolk wethers were blocked into two periods with six wethers in each period. Within each period, wethers were fed a forage-based diet (n = 3) or a concentrate-based diet (n = 3). Six angus steers were also fed a forage-based diet (n = 3) or a concentrate-based diets (n = 3) in switchback design with two periods. All animals were adapted to diets for a minimum of 3 wk, then feed intake, refusals, and feces were collected. Feed and fecal dry matter (DM), organic matter (OM), neutral detergent fiber (NDF), acid detergent fiber (ADF), and starch were analyzed. Refusals were analyzed for DM. Data were analyzed using Proc Mixed in SAS with diet and species as fixed and period as a random effect. Dry matter intake as percentage of body weight for each animal within each period was used as a covariable. There was an interaction (P < 0.01) between species and diet for DM and OM digestibility. When fed the concentrate-based diet, DM and OM digestibility were similar between wethers and steers (P > 0.18); however, when fed the forage-based diet, DM and OM digestibility was less (P < 0.01) for wethers than steers. Like DM and OM, an interaction (P < 0.05) between species and diet was present for starch digestibility. When fed the forage-based diet, starch digestibility did not differ (P = 0.66) between wethers and steers; however, when fed concentrate-based diet, wethers had a greater starch digestibility (P < 0.05) than steers. There was no interaction (P > 0.45) between species and diet for NDF and ADF digestibility. Regardless of the diet fed, NDF and ADF digestibilities were greater (P < 0.05) in steers than wethers. Present day sheep were not a good model for cattle when fed forage-based diets, but sheep were an acceptable model for cattle when fed concentrate-based diets.

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The Performance of Steers Fed on Sugarcane in natura or Ensiled with Concentrate

Journal of Agricultural Science ◽

10.5539/jas.v9n3p226 ◽

2017 ◽

Vol 9 (3) ◽

pp. 226

Author(s):

Dheynne Alves Vieira ◽

Andréia Santos Cezário ◽

Wallacy Barbacena Rosa dos Santos ◽

Jeferson Corrêa Ribeiro ◽

Tiago Neves Pereira Valente ◽

...

Keyword(s):

Crude Protein ◽

Dry Matter ◽

Neutral Detergent Fiber ◽

Dry Matter Intake ◽

Daily Weight Gain ◽

Zebu Cattle ◽

Feed Conversion ◽

Average Daily Weight Gain ◽

High Dry Matter ◽

Randomized Experimental Design

The aim of this study was to evaluate the performance of crossbred Holstein × Zebu steers fed on the diets containing sugarcane in natura or ensiled with two levels of concentrate (30% and 70%). A total of 32 males of 394 kg of body weight were used in a completely randomized experimental design with four treatments and seven repetitions. The animals reported a high dry matter intake (DMI) (P < 0.05) when fed on the high concentrate levels. The increase in concentrate levels resulted in an approximately 25% to 60% higher DMI as compared to the lowest level offered by silage-based diets and sugarcane in natura. The highest apparent digestibility coefficients of dry matter were observed in the diets based on sugarcane in natura (P < 0.05). The sugarcane based diets also affected (P > 0.05) the digestibility of organic matter, neutral detergent fiber, crude protein, ether extract, and non-fiber carbohydrates. There were no differences (P > 0.05) between the diets for average daily weight gain, carcass dressing, carcass gain, and feed conversion. The diets based on sugarcane in nature or ensiled with 30% and 70% concentrates do not influence the performance of crossbred Holstein × Zebu cattle.

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The Performance and Carcass Characteristics of Black Baladi Kids Fed Diets with Graded Quantities of Sweet Lupin Grain (Lupinus angustifolius)

Veterinary Sciences ◽

10.3390/vetsci9010020 ◽

2022 ◽

Vol 9 (1) ◽

pp. 20

Author(s):

Belal S. Obeidat

Keyword(s):

Body Weight ◽

Dry Matter ◽

Average Daily Gain ◽

Carcass Characteristics ◽

Cost Effective ◽

Neutral Detergent Fiber ◽

Acid Detergent Fiber ◽

Diet Cost ◽

Daily Gain

A study was conducted to examine how lupin grains (LUPs) feeding affected nutritional intake, digestibility, growth, and carcass characteristics in kids. A total of 24 growing black kids (initial body weight (BW) = 16.4 ± 0.49 kg) were allocated to one of three diets at random. Lupin was included in the diet at a rate of 0 (control; CON), 100 (LUP100), or 200 g/kg (LUP200) of total dry matter (DM). The trial lasted for 91 days divided into 7 and 84 days to be used for adaptation and data collection, respectively. Feed intake was evaluated daily throughout the study. At the commencement and the end of the study, each kid’s body weight was measured to determine its average daily gain (ADG). On day 70, 5 kids were chosen at random from each group to investigate nutrient in vivo digestibility and N balance. At the end of the study, all of the kids were slaughtered to examine carcass features. Nutrient intakes (neutral detergent fiber, acid detergent fiber, and ether extract) were higher (p ≤ 0.01) in LUP-containing diets than in the CON diet. The average daily gain was greater (p ≤ 0.03) in diets containing lupin grains than in the CON diet. Cost of gain ($US/kg growth) was lower (p = 0.004) in kids fed diets containing lupin than the CON diet. Dry matter and CP digestibility rates were greater (p ≤ 0.03) in lupin diets. Retained N was higher (p = 0.04) in lupin-containing diets than in the CON diet. Cold carcass weight was higher (p < 0.05) for kids consuming the LUP100 diet than the CON diet. In lupin diets, carcass cut weights were higher (p < 0.05). Results of the current study indicate that feeding black kids diets containing lupin grains at 100 or 200 g/kg DM basis is cost effective and would increase profitability.

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Excretions of Urinary Creatinine on Young and Mature Kacang Goat under Different Feeding Levels

ANIMAL PRODUCTION ◽

10.20884/1.anprod.2015.17.1.479 ◽

2015 ◽

Vol 17 (1) ◽

pp. 30

Author(s):

Nurul Mukminah ◽

Edy Rianto ◽

Endang Purbowati

Keyword(s):

Body Weight ◽

Weight Gain ◽

Crude Protein ◽

Dry Matter ◽

Body Weight Gain ◽

Dry Matter Intake ◽

Age Group ◽

Creatinine Excretion ◽

Urinary Creatinine ◽

Feeding Level

Abstract. This study was aimed to examine the excretion of urinary creatinine in young and mature Kacang goat bucks under different feeding levels. This study used 16 Kacang goat bucks consisting of 2 groups of age, i.e. eight young bucks (aged 6-7 months, weighed 12.75±2.68 kg) and 8 mature bucks (age 9-12 months, weighed 17.34±3.32 kg). The bucks were fed pelleted complete feed containing 78.82% dry matter (DM), 18.80% crude protein (CP), and 76.29% total digestible nutrients (TDN). The bucks were allocated into a 2x2 nested design with four replications. The treatment was the amount of 2.24% dry matter intake (T1) and 4.48% of body weight (BW) (T2) for the young goat, while the mature buck was 1.87% and 3.74%, respectively. The results showed that DM, CP and TDN intake were significant different across ages and highly significantly different between feeding levels. Changes of urinary creatinine from week 0–12 showed no differences in the age group (142 mg/dl) and feeding level (143 mg/dl). Conclusively, age and feed level affected body weight, feed intake and creatinine excretion of Kacang Goat. The more body weight gain (age) and feed level, the more urinal creatinine excretion in male Kacang goat. Key words: Kacang goat, ages, feeding level, and creatinine Abstrak. Penelitian ini bertujuan untuk mengkaji kadar kreatinin pada kambing Kacang muda dan dewasa dengan jumlah pemberian pakan yang berbeda. Materi berupa 16 ekor kambing Kacang jantan, terdiri dari 8 ekor umur muda (6-7 bulan) dan 8 ekor umur dewasa (9-12 bulan). Pakan komplit yang diberikan memiliki kandungan bahan kering (BK) 78,82%, protein kasar (PK) 18,80%, dan total digestible nutrients (TDN) 76,29%. Rancangan penelitian ini adalah pola tersarang 2x2 dengan 4 ulangan. Perlakuan pakan berupa jumlah BK pakan yang diberikan yaitu 2,24% bobot badan (BB) (T1) dan 4,48% BB (T2) untuk kambing muda, sedangkan kambing dewasa sebesar 1,87% BB (T1) dan 3,74% BB (T2). Hasil penelitian menunjukkan bahwa konsumsi BK, PK dan TDN berbeda nyata pada kelompok umur dan berbeda sangat nyata pada perlakuan pakan. Kadar kreatinin pada minggu ke 0-6 tidak berbeda nyata, namun pada minggu ke 12 berbeda nyata baik kelompok umur maupun akibat perlakuan pakan. Perubahan kadar kreatinin dari minggu ke 0-12 menunjukkan perbedaan yang tidak nyata pada kelompok umur dan perlakuan pakan. Kesimpulan dari penelitian ini adalah kadar kreatinin semakin meningkat dengan semakin meningkatnya bobot badan (umur) dan pakan ternak. Kata kunci : kambing Kacang, umur, level pakan, dan kreatinin

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

Jurnal Agripet ◽

10.17969/agripet.v13i2.819 ◽

2013 ◽

Vol 13 (2) ◽

pp. 41-46 ◽

Cited By ~ 3

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.

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Pengaruh Suplementasi Ampas Tahu, Ampas Tempe dan Ampas Kecap dalam Ransum Terhadap Performan Domba Lokal Jantan

Sains Peternakan ◽

10.20961/sainspet.5.1.1-9 ◽

2017 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Eka Handayanta

Keyword(s):

Body Weight ◽

Organic Matter ◽

Crude Protein ◽

Average Daily Gain ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Soy Sauce ◽

Feed Consumption ◽

Feed Conversion ◽

Daily Gain

The aim of this research to determine the effect of supplementation of tofu. tempe, and soy sauce waste in ration on male local sheep performance. This research was carried out during three month, take place on July until October 200E in Minifarm Dept. of Animal Science, Agriculture Faculty of Sebelas Maret University, located in Jatikuwung. Gondangrejo, Karanganyar. It used 12 male local sheeps with average body weight of 15.86 ±0.93 kg, divided into four treatments and three replications, each replication consist of one sheep. The ration consisted of king grass only as basal diet, as many as four percent base on body weight. The treatment given is in the form of feed supplement, that namely without supplement (RO), 250 gram tofu waste (R1), 250 gram tempe waste (R2), and 250 gram soy sauce waste (R3). The data variables collected were feed consumption, dry and organic matter digestibility, crude protein consumption, energy consumption, average daily gain, and feed conversion ratio. All of data except average daily gain was analyzed by completely randomized design one way classification. While average daily gain was analyzed by covariance analyze. The result were significant followed by Duncan new multiple range test. The result showed that average of R0, RI, R2 and R3 for feed consumption 430.52; 720.44; 704.44; 549.08 gram/day, dry matter digestibility (%) 61,07; 72,46; 69,68: 63,60, organic matter digestibility (%) 64,41: 74,94; 72.41; 64,7 1, crude protein consumption 47.66; 106.77; 85.83; 73.70 gram/day, energy consumption 281.82; 482.65; 432.67; 330.83 gram/day, average daily gain 50.00.1X00: 116.19; 38.10 gram/day and feed conversion ratio 8.74; 5.61; 6.06; 15.2. The result of variance analyze showed that feed supplementation have highly significant effect (P<0.01) on all of the data variable colected. Conclusion of this research was supplementation of tofu waste and tempe waste could improved performance, while soy sauce waste could not improved the performance of male local sheep. Key words : sheep, tofu waste, tempe waste, soy sauce waste, performance

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

Journal of Animal Science ◽

10.1093/jas/skz258.855 ◽

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.

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