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The objective of this study was to evaluate the intake, digestibility, nitrogen balance, and performance of feedlot lambs fed diets containing crude glycerin. A total of 30 Ile de France lambs were confined to individual pens at an average age of 45 d: 15.1 kg initial body weight and 32.2 kg final body weight. The animals were distributed in a completely randomized design and fed three diets containing fresh sugarcane as forage (50 %) and concentrate (50 %), with or without the inclusion of 100 and 200 g vegetable crude glycerin per kilogram dry matter (DM) replacing corn. Dietary glycerin inclusion reduced the intake of ether extract (P) and total carbohydrates (P=0.048) as well as the apparent digestibility of ether extract (P), but it had no effect on the intake and digestibility of the other nutrients nor on lamb performance. The apparent nitrogen balance of lambs on the three diets was positive. Although it does not affect the intake and digestibility of most nutrients, the inclusion of 100 and 200 g kg−1 DM of crude glycerin in the diet tends to worsen lamb performance, indicating that the ideal level of inclusion should be below 100 g kg−1 DM of crude glycerin.

Made available in DSpace on 2022-05-01T15:13:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-04-01 The objective of the present study was to evaluate the inclusion of marine algae meal associated with vitamin E in lamb feed regarding nutrient intake and digestibility, nitrogen balance, ingestive behavior, ruminal parameters, performance, and carcass characteristics. A total of 32 Ile de France lambs (average age of 2 months and average initial body weight of 20.0 ± 0.2 kg) were distributed in a completely randomized design in four experimental diets: CO = control (no added marine algae and vitamin E); MA = marine algae meal; VE = vitamin E, and MAVE = marine algae meal + vitamin E. In order to assess the ruminal parameters in vitro (pH, ammonia-nitrogen, and short-chain fatty acids), with repeated measures over time (0, 2, 4, 6, and 8 hours), eight ruminally cannulated Santa Inês sheep were used. Nutrient intake and the apparent nitrogen balance were not influenced (P>0.05) by the diets. The inclusion of MA resulted in greater (P=0.05) ethereal extract digestibility (94.41%). Meanwhile, neutral detergent fiber digestibility was lower (P=0.04) in the CO group (56.50%). Animals from this group spent less (P0.05). Although the MA can be used, associated or not with VE, to feed confined lambs, as it does not compromise the performance of the animals more research should be carried out to assess the potential of both. Federal University of Agreste of Pernambuco, Av. Bom Pastor, s/n – Boa Vista, Pernambuco State São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences Department of Animal Science, Via de Acesso Professor Paulo Donato Castelane Castellane S/N - Vila Industrial, São Paulo State Institute of Biodiversity and Forestry Federal University of Western Pará São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences Department of Animal Science, Via de Acesso Professor Paulo Donato Castelane Castellane S/N - Vila Industrial, São Paulo State

Made available in DSpace on 2021-06-25T10:19:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Marine microalgae of the genus Schizochytrium can be used in the diet of sheep a source of protein and energy and changing meat composition essentially due to its high content in docosahexaenoic acid (DHA). The objective was to evaluate the best inclusion level of marine microalgae meal in the lamb diet on the performance, carcass traits and meat quality. A total of thirty-two uncastrated Ile de France lambs with an initial average body weight (BW) of 20 ± 0.2 kg were distributed in a completely randomized design with eight replicates and four treatments [marine microalgae meal inclusion at 0 (control), 2; 4 and 6% in dry matte (DM)]. Marine microalgae meal inclusion in the diets of lambs reduced (P ≤0.05) DM intake, average daily gain, ruminal papilla height and width, meat cholesterol, C18:0, C18:1n–9, C18:2n–6, ΣMUFA:ΣSFA ratio, Σn–6 and Δ9–desaturase-C16 activity of longissimus muscle. However, the marine microalgae meal increased (P ≤0.05) the feeding conversion, liver weight, meat lipid oxidation, C16:0, C17:0, C18:1n–7, 18:2 c9-t11 (CLA), C20:5n–3 (EPA) and C20:6n–3 (DHA), ΣPUFA, Σn–3, atherogenicity (AI) and thrombogenicity (TI) index, ΣHypercholesterolemic (H) FA and ΣPUFA:ΣSFA ratio. The carcass weight and yield, most of the variables of physicochemical composition and other FAs were not affected (P >0.05) by marine microalgae meal inclusion in the diet. The marine microalgae meal inclusion up to 6% level in Ille de France lambs’ diet was not efficient because it reduced the DMI, performance and feeding efficiency of the animals and it worsen lipid oxidation and healthy meat compounds AI, TI and h:H indexes. However, regarding meat fat quality, the microalgae inclusion confirmed the hypothesis of improving EPA, DHA, Σn–3 and CLA concentrations and reducing meat total cholesterol. Federal University of Agreste of Pernambuco, Av. Bom Pastor, s/n – Boa Vista São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences Department of Animal Science, Via de Acesso Professor Paulo Donato Castelane Castellane S/N - Vila Industrial Federal University of Campina Grande Department of Animal Science Avenida Universitária, s/n - Jatobá São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences Department of Animal Science, Via de Acesso Professor Paulo Donato Castelane Castellane S/N - Vila Industrial

Made available in DSpace on 2020-12-10T17:38:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-04-22 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Background: Intensification of livestock is a strategy that increases productivity, but the diets used to increase animal production efficiency are composed mainly of corn and soybean, thereby increasing competition between animals and humans for the same food crops. This study evaluated nutrient intake, apparent digestibility of dry matter (DM) and nutrients, kinetics of gas production, and concentration of volatile fatty acids on diets with or without inclusion of biodiesel co-products formulated for feedlot lambs. So, the hypothesis is that replace of traditional ingredients by biodiesel co-products changes rumen parameters and methane emissions. Materials, Methods & Results: The experiment was developed in Sao Paulo State University (Unesp), Jaboticabal, SP, Brazil, in Sheep Production Laboratory, which is owned to Animal Science Department. All trials developed in this study used a feedlot system, where animals were kept in individual pen. Forty He de France lambs male non-castrated were used in in vivo trial. To obtain rumen fluid, that was used in in vitro trial, four Santa Ines lambs with rumen cannula were used. The treatments evaluated were four diets: Control diet: roughage + concentrate; PM20: roughage + concentrate with peanut meal (PM) at 20% of DM; CG25: roughage + concentrate with crude glycerin (CG) at 25% of DM; and PMCG: roughage + concentrate with PM at 10% of DM and CG at 12.5% of DM. The roughage:concentrate ratio was 40:60 for all these diets. The parameters of the in vitro and in vivo experiments used were completely randomized with four treatments. When significant, the means between treatments were compared using Tukey test (P < 0.05). There was no effect of co-product inclusion on intake, except ether extract and neutral detergent fiber, which were higher for PM20 compared with CG25 diet. Apparent digestibility of dry matter (79.87%) and some nutrients (organic matter, crude protein, and neutral detergent fiber) was higher (P < 0.05) with CG25 diet. In vitro cumulative gas production was greater in CG25 and PMCG compared to the other diets, at early measurement points (2, 4, 6, and 10 h). The concentrations of methane, volatile fatty acids, and acetate:propionate ratio in vitro did not differ (P > 0.05) among diets. Discussion: Probably the high quality of the glycerin used (83.9% glycerol, 12.01% humidity, 3.79% salts, and 0.28% organic matter, no fat, as described by the manufacturer) may explain the low EE concentration observed in the diet using only crude glycerin and the observed lack of DMI effects in all diets. About apparent digestibility, the greater values measured for crude protein can be explained by superior synchronism during fermentation of the proteins and carbohydrates in the diet. The data showed that treatment CG25 obtained higher initial gas production, followed by treatment PMCG which contained 12.5% crude glycerin. Probably these results were caused by the greater apparent digestibility of DM in treatments that included crude glycerin. Our results of volatile fatty acid concentration are different from the decrease in molar proportion of acetic acid and increase of propionic acid described by several authors, with the inclusion of glycerin in the diet. However, the absence of effect by co-product inclusion on the molar proportion of acetic, propionic, and butyric acids measured in this trial reinforce the report from other authors that affirmed the same situation. Hence, the inclusion of PM at 20% of DM and CG at 25% of DM could successfully replace the traditional diets of feedlot lambs such as soybean and corn, respectively, without damages to intake and ruminal parameters in vitro. Sao Paulo State Univ Unesp, Sch Agr & Veterinarian Sci, Dept Anim Sci, Jaboticabal, SP, Brazil Fed Rural Univ Pernambuco UFRPE, Acad Unit Garanhuns UAG, Garanhuns, PE, Brazil Santa Catarina Fed Univ UFSC, Dept Anim Sci & Rural Dev, Florianopolis, SC, Brazil Sao Paulo State Univ Unesp, Sch Agr & Veterinarian Sci, Dept Anim Sci, Jaboticabal, SP, Brazil FAPESP: 2013/23495-5 FAPESP: 2012/25250-7 FAPESP: 2013/09364-5 FAPESP: 2015/03918-4 CNPq: 142283/2014-2 CNPq: 131978/2014-4

The objective of this study was to evaluate the yield and centesimal and mineral composition of non-carcass components of lambs fed diets containing 0, 12.5 and 25.0% mulberry hay as concentrate substitute. Twenty-four uncastrated male Ile de France lambs with an initial body weight of 15 kg and final weight of 32 kg were used. The increase in mulberry hay in the diet exerted a quadratic effect on esophageal (R2=1.0) and spleen weight (R2=1.0), pulmonary iron content (R2=0.94), calcium content of the heart (R2=0.99), and sodium and potassium content of the kidneys (R2=1.0). A linearly decreasing effect (R2=0.98) was observed for skin and paws weight (R2=0.93), and linearly increasing effect for copper content of the lung (R2=1.0), sodium content of the liver (R2=0.93), potassium content of the heart, (R2=0.97) and iron content of the kidneys (R2=0.77). There was a linearly increasing effect on most minerals in the tongue, except for magnesium, manganese and zinc. The centesimal composition of non-carcass components did not differ (P>0.05) between treatments. In conclusion, mulberry hay can be included at up to 25% in the diet of lambs without negatively altering the main quantitative and nutritional characteristics of non-carcass components of sheep.

Made available in DSpace on 2018-12-11T16:49:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The aim of this study was to evaluate the animal performance, commercial cuts, and their yields within the production system, and economics of sheep production, of lambs finished in feedlots and fed with or without biodiesel co-products. A total of 40 lambs were divided into four biodiesel co-product treatment groups: a no-treatment control; peanut meal; crude glycerin; and peanut meal + crude glycerin. Animal performance did not differ (P > 0.05) among the treatment groups, where the average daily gain was close to 0.26 kg/day. Likewise, the quantitative carcass characteristics did not differ (P > 0.05) and the biological mean yield was 54.92%. Similarly, the commercial cuts and their yields did not differ (P ≥ 0.09) among the treatments. These results took into consideration the standard, age, and slaughter body weight of the animals. The economic evaluation determined that peanut meal was the best co-product for use in finishing lambs in a feedlot. Hence, all the biodiesel co-products evaluated can be used at feedlots to finish lambs without changing the variables measured. Department of Animal Science School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp) Department of Exact Science School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp) Department of Animal Science School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp) Department of Exact Science School of Agricultural and Veterinarian Sciences São Paulo State University (Unesp) CNPq: 131978/2014-4 FAPESP: 2012/25250-7 FAPESP: 2013/09364-5 FAPESP: 2013/23495-5

Made available in DSpace on 2018-11-26T17:06:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-09-01. Added 1 bitstream(s) on 2019-10-09T18:26:19Z : No. of bitstreams: 1 S1516-35982016000900554.pdf: 304297 bytes, checksum: 700d7817693b576c858f4b98ec89e8c2 (MD5) Made available in DSpace on 2018-11-26T17:06:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-09-01. Added 1 bitstream(s) on 2019-10-09T18:26:19Z : No. of bitstreams: 1 S1516-35982016000900554.pdf: 304297 bytes, checksum: 700d7817693b576c858f4b98ec89e8c2 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objective of this study was to evaluate the physicochemical and nutritional characteristics of meat from three muscles of Ile de France lambs fed diets containing different levels of glycerin as an alternative to corn. Thirty non-castrated feedlot Ile de France lambs weighing 15 +/- 0.2 kg were housed in individual pens and slaughtered at 32 +/- 0.2 kg. Treatments consisted of three diets: sugarcane + 0% glycerin; sugarcane + 10% glycerin; and sugarcane + 20% glycerin; and three muscles were evaluated: triceps brachii, semimembranosus, and longissimus lumborum. No interactions were observed among glycerin levels and muscle types for the quality characteristics evaluated. Muscles were similar in terms of physicochemical and nutritional characteristics, and only differed in sarcomere length, diameter of muscle fibers, and cholesterol content. Dietary glycerin did not affect pH, water holding capacity (24 h and 30 days after slaughter), weight loss by thawing and cooking, shear force, diameter of muscle fibers, sarcomere length, lipid oxidation, chemical composition, or meat cholesterol content. Dietary glycerin resulted in a linear decrease of muscle yellowness from 3.99 to 3.29. Dietary glycerin altered intramuscular fat fatty acid profile, increasing the concentration of margaric acid (1.47 to 2.61%). Up to 20% glycerin can be included in the diet of feedlot lambs without any harm to meat quality. Univ Estadual Paulista, Fac Ciencias Agr & Vet, Programa Posgrad Zootecnia, Jaboticabal, SP, Brazil Univ Estadual Paulista, Dept Zootecnia, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil Univ Estadual Paulista, Inst Biociencias, Dept Parasitol, Botucatu, SP, Brazil Univ Fed Oeste Para, Inst Biodiversidade & Floresta, Santarem, PA, Brazil Univ Estadual Paulista, Fac Ciencias Agr & Vet, Programa Posgrad Zootecnia, Jaboticabal, SP, Brazil Univ Estadual Paulista, Dept Zootecnia, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil Univ Estadual Paulista, Inst Biociencias, Dept Parasitol, Botucatu, SP, Brazil

The objective of this study was to evaluate the qualitative (pH, color, water activity, water retention capacity, cooking loss, and shear force) and sensory characteristics of processed meat produced from less noble cuts of the carcasses of lambs fed diets containing sugarcane as roughage and concentrates with and without 10 and 20% glycerine. Neck and rib meat of 30 lambs slaughtered at a body weight of 32.0 ± 0.2 kg was used for the elaboration of hamburgers and koftas. Except for color, the inclusion of glycerine in the lamb diet did not influence (P>0.05) the qualitative traits evaluated. The inclusion of glycerine reduced the redness (from 10.07 to 8.89, P=0.044) and yellowness (from 5.97 to 5.07, P=0.039) of hamburgers. The same effect was observed for the redness (from 10.83 to 9.61, P=0.031) and yellowness (from 5.86 to 5.12, P=0.047) of koftas. The sensory characteristics evaluated were not influenced (P>0.05) and the grades of overall acceptance ranged from 7.4 to 7.9. The inclusion of glycerine in the diet of lambs altered the color of processed meat products, but provided satisfactory sensory characteristics.

Made available in DSpace on 2020-12-12T01:15:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-04-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) This study aimed to evaluate the effects on lamb meat quality of replacing the soybean meal and corn diet with peanut meal and crude glycerin. A total of 40 lambs, with an initial body weight of 17.15 ± 1.56 kg, were divided into four biodiesel by-product treatment groups: a no-treatment control, peanut meal, crude glycerin, and peanut meal + crude glycerin. The roughage-to-concentrate ratio was 40:60 in all diets. Peanut meal, crude glycerin, and their combination had no effect on the physicochemical characteristics of the meat, except the fatty acid profile. The meat from animals fed the diets with crude glycerin and peanut meal + crude glycerin had higher proportions of oleic, pentadecanoic, heptadecanoic, and eicosapentaenoic fatty acids, lower proportions of palmitic acid, a lower atherogenicity index, a lower sum of hypercholesterolemic fatty acids, and stronger hypocholesterolemic:hypercholesterolemic relationships. When used as alternative sources of protein and energy in the diet of feedlot lambs, peanut meal and crude glycerin improve the lipid profile of the meat. Department of Animal Science São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences Institute of Biodiversity and Forestry Federal University of Western Pará Department of Animal Science Federal University of Bahia Department of Animal Science São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences FAPESP: 2013/ 23495-5

Were evaluated the microbiological and physicochemical characteristics of fresh and aged semimembranosus muscle from 40 uncastrated male Ile de France lambs with 17.15 ± 1.56 kg of initial body weight. Treatments involved fresh and meat aged for 14 days at 4 ºC from lambs receiving four diets, as follows: control; PM - diet with 20% peanut meal replacing soybean meal; G - diet with 25% glycerin replacing corn; and PMG - diet with 10% peanut meal and 12.5% glycerin. The forage:concentrate ratio was 40:60, and corn silage was used as roughage. The diets had similar values of crude protein and metabolizable energy (17.47% and 2.72 Mcal kg/dry matter). A completely randomized design was adopted in a 4×2 factorial arrangement (four diets × fresh and aged meat). Diets and aging did not favor the development of microorganisms in the meat. There was an interaction effect between diets and aging for pH, color, cooking weight loss (CL), and shear force (SF). The fresh meat from animals fed G was lighter compared with the meat from those consuming PM and PMG (lightness of 38.45, 36.26 and 37.88 respectively). Aging increased lightness (37.63 to 40.87), red intensity (15.12 to 15.93), yellow intensity (2.48 to 3.42) and CL (23.84 to 32.59%), reduced pH (5.66 to 5.45), water holding capacity (61.85 to 58.87%) and SF (22.60 to 16.95 N). By-products from biodiesel and peanut production can be used to replace corn and soybean meal in diets for lambs without compromising their meat quality.

Made available in DSpace on 2015-10-21T20:39:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-04-01. Added 1 bitstream(s) on 2015-10-22T09:47:54Z : No. of bitstreams: 1 S1516-35982015000400146.pdf: 323212 bytes, checksum: e9f364547c43e46d7669706da472ec01 (MD5) Made available in DSpace on 2015-10-21T20:39:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-04-01. Added 1 bitstream(s) on 2015-10-22T09:47:54Z : No. of bitstreams: 1 S1516-35982015000400146.pdf: 323212 bytes, checksum: e9f364547c43e46d7669706da472ec01 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objective of this study was to evaluate production, chemical composition, and estimates of total solids and fatty acid profile of milk from 1/2 Lacaune x 1/2 Ile de France ewes fed control and soybean seeds-supplemented diets. Additionally, Roquefort type cheese was also produced and subjected to sensory analysis. Twenty four 1/2 Lacaune x 1/2 Ile de France ewes were divided into three groups and fed a control diet and diets containing 70 and 140 g kg(-1) soybean as fed, during the lactation period. The remainder milk was used to produce Roquefort cheese. The experimental design was completely randomized, with three treatments (0, 70, and 140 g of soybean kg(-1) as fed) and eight repetitions. The diets did not affect significantly the performance (56.72 kg post-birth weight; 62.63 kg weight after 56 lactation days; 2.03 kg day(-1) dry matter intake; 0.11 kg average daily weight gain), or milk production (443.61 mL day(-1)), density (1.035 g mL(-1)), acidity (19.33 degrees D), and pH (6.41) of lactating ewes. Milk chemical composition was (per 100 g of milk): 14.86 g total solids, 9.84 g solids not fat, 4.98 g protein, 4.14 g casein, 5.03 g fat, and 4.11 g lactose. Saturated (72.07 g/100 g of fat), monounsaturated (21.48 g/100 g of fat) and polyunsaturated (6.37 g/100 g of fat) fatty acids were not significantly different. However, the polyunsaturated linoleic acid was significantly different in the milk from ewes fed the diet containing 140 g of soybean kg(-1) as fed (5.58 g/100 g of fat) compared with those fed the control diet and 70 g of soybean kg(-1) as fed (3.82 g/100 g of fat). The Roquefort type cheese had excellent acceptance by the panel. The highest cheese yield was obtained with the milk from ewes fed diets containing 70 g kg(-1) soybean as fed. A diet containing 140 g kg(-1) soybean as fed is recommended as it leads to greater linoleic acid content in the ewes milk, improving the lipid fractions and nutritional quality of the milk. Univ Estadual Paulista, Fac Ciencias Agr &Vet, Dept Zootecnia, Jaboticabal, SP, Brazil Univ Oeste Paulista, Presidente Prudente, SP, Brazil Univ Estadual Paulista, Fac Ciencias Agr &Vet, Programa Posgrad Zootecnia, Jaboticabal, SP, Brazil Univ Estadual Paulista, Fac Ciencias Agr &Vet, Dept Ciencias Exatas, Jaboticabal, SP, Brazil Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Ciências Agrárias e Veterinárias, Departamento de Zootecnia, Jaboticabal, SP, Brasil Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Ciências Agrárias e Veterinárias, Programa de Pós-graduação em Zootecnia, Jaboticabal, SP, Brasil Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Ciências Agrárias e Veterinárias, Departamento de Ciências Exatas, Jaboticabal, SP, Brasil

The aim of this study was to evaluate performance, nutrient digestibility, and carcass quantitative traits of lambs fed diets with and without sunflower seeds and vitamin E. Thirty-two uncastrated lambs at approximately 60 days of age, with 15 ± 0.2 kg, were housed in individual stalls and slaughtered at 32.0 ± 0.2 kg body weight. Treatments consisted of the following four diets: C = sugarcane + concentrate; CS = sugarcane + concentrate with sunflower seeds; CE = sugarcane + concentrate with 1,000 mg vitamin E kg-1 diet dry matter (DM); and CSE = sugarcane + concentrate with sunflower seeds and 1,000 mg vitamin E kg-1 diet DM. The experimental design was completely randomized, in a 2 × 2 factorial arrangement (with and without sunflower seeds and with or without vitamin E, on the diet DM basis), and means were compared by Tukey’s test at 5% significance level. Consumption of vitamin E intake by the lambs provided (P < 0.05) the highest ether extract intake (20.91 g day-1) and consequently the highest (P < 0.05) digestibility of this nutrient (85.34%); however, it reduced (P < 0.05) the intakes of total carbohydrates (394.81 g day-1) and non-fibrous carbohydrates (242.47 g day-1) as a direct consequence of the diet composition. Inclusion of sunflower seeds and vitamin E in the lamb diets did not influence (P > 0.05) carcass morphological or quantitative measurements. Sunflower seeds and vitamin E showed to be satisfactory alternatives for inclusion in the concentrate for feedlot lambs, providing good performance and quality carcasses.

Objetivou-se com este trabalho avaliar o consumo, a sintese de proteina microbiana e o balanco de nitrogenio em cordeiros alimentados com racoes contendo 0,00; 12,50 e 25,00% de feno de amoreira em substituicao ao concentrado. Foram utilizados vinte e quatro cordeiros Ile de France, com aproximadamente 60 dias de idade e 15,48 ± 0,07 kg de peso corporal, confinados em baias individuais e abatidos ao atingirem 32 kg de peso corporal. Apenas a ingestao de extrato etereo e energia metabolizavel apresentaram reducao linear (P

Objetivou-se com este trabalho avaliar o consumo, a síntese de proteína microbiana e o balanço de nitrogênio em cordeiros alimentados com rações contendo 0,00; 12,50 e 25,00% de feno de amoreira em substituição ao concentrado. Foram utilizados vinte e quatro cordeiros Ile de France, com aproximadamente 60 dias de idade e 15,48 ± 0,07 kg de peso corporal, confinados em baias individuais e abatidos ao atingirem 32 kg de peso corporal. Apenas a ingestão de extrato etéreo e energia metabolizável apresentaram redução linear (P