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Bromatological evaluation of eleven corn cultivars harvested at two cutting heights R. Bras. Zootec.
Caetano,Hamilton; Oliveira,Mauro Dal Secco de; Freitas Júnior,José Esler de; Rêgo,Aníbal Coutinho do; Carvalho,Marina Vieira de; Rennó,Francisco Palma.
The objective of this study was to evaluate the chemical composition and dry matter in vitro digestibility of stem, leaf, straw, cob and kernel fractions of eleven corn (Zea mays) cultivars, harvested at two cutting heights. The experiment was designed as randomized blocks, with three replicates, in a 2 × 11 factorial arrangement (eleven cultivars and two cutting heights). The corn cultivars evaluated were D 766, D 657, D 1000, P 3021, P 3041, C 805, C 333, AG 5011, FOR 01, CO 9621 and BR 205, harvested at a low cutting height (5 cm above ground) and a high cutting height (5 cm below the first ear insertion). Cutting height influenced the dry matter content of the stem fraction, which was lower (23.95%) in plants harvested at the low, than in plants...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage; In vitro digestibility; Ruminant; Zea mays.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100002
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Efeito da condição corporal ao parto sobre o desempenho produtivo de vacas mestiças Holandês × Zebu R. Bras. Zootec.
Freitas Júnior,José Esler de; Rocha Júnior,Vicesnte Ribeiro; Rennó,Francisco Palma; Mello,Marco Túlio Parrela de; Carvalho,Alexssandre Pinto de; Caldeira,Luciana Albuquerque.
Vinte e cinco vacas mestiças Holandês × Zebu foram utilizadas para avaliar o efeito da condição corporal ao parto sobre a produção e composição do leite e a mobilização de reservas corporais, avaliada por meio da variação da condição corporal do parto até os 120 dias de lactação. Os animais foram divididos em duas classes, de acordo com seu escore de condição corporal ao parto (ECCP), em uma escala de 1 (muito magra) a 5 (muito gorda): classe 1, vacas com ECCP > 3,25; e classe 2, vacas com ECCP <3,25. As classes diferiram entre si quanto ao escore de condição corporal ao parto; as médias foram de 3,71 e 2,58, respectivamente, para as vacas das classes 1 e 2. As vacas da classe 1 apresentaram maior mudança de escore de condição corporal (MECC) do...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Escore corporal; Composição e produção do leite; Mobilização de reservas corporais; Vacas mestiças.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008000100017
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Effect of unsaturated fatty acid supplementation on digestion, metabolism and nutrient balance in dairy cows during the transition period and early lactation R. Bras. Zootec.
Rennó,Francisco Palma; Freitas Júnior,José Esler de; Gandra,Jefferson Rodrigues; Maturana Filho,Milton; Verdurico,Lenita Camargo; Rennó,Luciana Navajás; Barletta,Rafael Villela; Vilela,Flávio Garcia.
The objective of this study was to evaluate the influence of unsaturated fatty acids in diets for dairy cows during the transition period and early lactation on intake, digestion and nutrient balance. Thirty-six multiparous and pregnant Holstein cows were randomly distributed to receive one of the experimental diets in the period from 35 days before the expected date of parturition to 84 days post-partum. Diets were fed as a total mixed ration and were as follows: control (C); soybean oil (SO), based on inclusion of 30 g/kg (DM basis); and calcium salts of unsaturated fatty acids (CS), based on inclusion of 30 g/kg (DM basis). Pre-partum dry matter intakes (DMI) of cows fed C, SO and CS were 11.9, 9.5 and 9.6 kg/d, respectively. Post-partum DMI was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dry matter intake; Energy balance; Ruminant digestion.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000400212
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Effects of BST and high energy diet on gene expression in mammary parenchyma of dairy heifers R. Bras. Zootec.
Lew,Betina Joyce; Oliveira,Mauro Dal Secco de; Freitas Júnior,José Esler de; Carvalho,Marina Vieira de; Rêgo,Aníbal Coutinho do; Rennó,Francisco Palma.
The objective of this study was to determine the effects of dietary energy and recombinant bovine somatotropin (bST) injection to identify genes that might control mammogenesis. Total RNA was extracted from the parenchymal tissue of 32 heifers randomly assigned to one of four treatments: two diets (a standard diet and a high energy, high protein diet), each with or without bST. To perform microarray experiments, RNA samples were pooled (2 animals/pool) before reverse transcription and labeling with Cy3 or Cy5. A 4-node loop design was used to examine the differential gene expression among treatments using a bovine-specific cDNA microarray (National Bovine Functional Genomics Consortium Library, NBFGC) containing 18,263 unique expressed sequence tags (EST)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gene regulation; Mammary gland development; Microarray; Nutrition; Somatotropin.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000700008
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Effects of polymer coated slow-release urea on ruminal fermentation and nutrient total tract digestion of beef steers R. Bras. Zootec.
Gardinal,Rodrigo; Gandra,Jefferson Rodrigues; Calomeni,Gustavo Delfino; Vendramini,Thiago Henrique Annibale; Takiya,Caio Seiti; Freitas Júnior,José Esler de; Souza,Heraldo Namorato de; Rennó,Francisco Palma.
ABSTRACT The objective of this study was to evaluate the effects of polymer coated slow-release urea (SRU) in high-forage diets of beef steers on nutrient intake and digestibility, ruminal fermentation, microbial protein synthesis, and energy balance. Eight 24-mo-old rumen-fistulated castrated Nellore steers (average body weight = 418.0±40.0 kg) were used in a replicated 4 × 4 Latin square design. Animals were randomly distributed to receive one of the following diets: no urea inclusion; 1.0% inclusion of feed grade urea in the diet (dry matter [DM] basis); 1.0% inclusion of slow-release urea 1 in the diet (DM basis); and 1.0% inclusion of slow-release urea 2 in the diet (DM basis). Slow-release urea 2 had a similar composition to that of slow-release urea...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia; Digestibility; Microbial protein; Nellore; Non-protein nitrogen; Soybean.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000200063
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Effects of polymer-coated slow-release urea on performance, ruminal fermentation, and blood metabolites in dairy cows R. Bras. Zootec.
Calomeni,Gustavo Delfino; Gardinal,Rodrigo; Venturelli,Beatriz Conte; Freitas Júnior,José Esler de; Vendramini,Thiago Henrique Annibale; Takiya,Caio Seiti; Souza,Heraldo Namorato de; Rennó,Francisco Palma.
ABSTRACTThe objective of this experiment was to quantify the effects of feeding polymer-coated slow-release urea on nutrient intake and total tract digestion, milk yield and composition, nutrient balances, ruminal fermentation, microbial protein synthesis, and blood parameters in dairy cows. Sixteen Holstein cows (580±20 kg of live weight (mean ± standard deviation); 90 to 180 days in milk (DIM); and 28 kg/d of average milk yield) were used in a replicated 4 × 4 Latin square experimental design. The animals were assigned to each square according to milk yield and DIM. The animals were randomly allocated to receive one of the following experimental diets: 1) control (without urea addition); urea (addition of 1% on the diet DM basis); polymer-coated slow...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen balance; Nitrogen efficiency; Non-protein nitrogen.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000900327
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Evaluation of corn cultivars harvested at two cutting heights for ensilage R. Bras. Zootec.
Caetano,Hamilton; Oliveira,Mauro Dal Secco de; Freitas Júnior,José Esler de; Rêgo,Aníbal Coutinho do; Rennó,Francisco Palma; Carvalho,Marina Vieira de.
The objective of this study was to evaluate the agronomic characteristics, bromatological-chemical composition and digestibility of 11 corn cultivars (Zea mays) harvested at two cutting heights. Cultivars D 766, D 657, D 1000, P 3021, P 3041, C 805, C 333, AG 5011, FO 01, CO 9621 and BR 205 were evaluated when they were harvested 5 cm above ground (low) and 5 cm below the insertion of the first ear (high). The experiment was designed as random blocks, with three replicates, arranged in an 11 x 2 factorial scheme. Cultivars presented similar productions of forage dry matter and grains. Percentages of stalk, leaf, straw, cob and kernel fractions were different among cultivars, as well as dry matter content of the whole plant at harvest. Considering the whole...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Neutral detergent fiber; Plant fractions; Productivity; Plant fractions; Water soluble carbohydrates.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000100003
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Expressão do gene da leptina e seu receptor Ob-Rb no parênquima mamário de novilhas leiteiras R. Bras. Zootec.
Lew,Betina Joyce; Oliveira,Mauro Dal Secco de; Carvalho,Marina Vieira de; Freitas Júnior,José Esler de; Rennó,Francisco Palma.
Objetivou-se com este trabalho avaliar os efeitos de uma dieta de alto nível de energia e proteína combinada com a aplicação de bST no perfil de expressão dos genes da leptina e de seu receptor Ob-Rb no parênquima mamário de novilhas leiteiras. Foram utilizadas amostras de parênquima mamário de 32 novilhas holandesas distribuídas aleatoriamente em quatro tratamentos (n=8): dieta com alto ou baixo teor de energia e proteína combinada ou não com a aplicação de bST. O delineamento utilizado foi em blocos casualizados com arranjo de tratamentos em esquema fatorial 2 × 2. A extração do RNA total das amostras de tecido foi feita e o nível de expressão gênica foi analisado por qRT-PCR utilizando-se o gene da glicuronidase β como controle, pelo método 2-ΔΔCt....
Tipo: Info:eu-repo/semantics/article Palavras-chave: BST; Energia; Glândula mamária; Nutrição.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500025
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Fatty acid composition of the longissimus dorsi muscle in crossbred steers fed different sources of fatty acids R. Bras. Zootec.
Aferri,Gabriela; Leme,Paulo Roberto; Pereira,Angélica Simone Cravo; Silva,Saulo da Luz e; Putrino,Soraia Marques; Freitas Júnior,José Esler de; Rennó,Francisco Palma.
The objective of this study was to evaluate the fatty acid composition of the longissimus dorsi muscle in carcasses of ¾ Bos taurus taurus ¼ Bos taurus indicus steers fed different sources of fatty acids. Thirty-six steers aged 14 months, with a mean live weight of 320 kg, were fed the following diets for 96 days: 1) control diet, containing no supplemental fat source; 2) CaSFA, diet containing 50 g calcium salts of fatty acids per kg total dry matter; 3) CS diet, containing 210 g cottonseed per kg total dry matter. The fatty acid composition of the longissimus dorsi muscle was determined by gas chromatography. No difference in slaughter weight, carcass weight, backfat thickness, or longissimus dorsi muscle area was observed between animals receiving the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calcium salts; Cottonseed; Fat.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700021
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Fatty acid profile and composition of milk protein fraction in dairy cows fed long-chain unsaturated fatty acids during the transition period R. Bras. Zootec.
Rennó,Francisco Palma; Freitas Júnior,José Esler de; Gandra,Jefferson Rodrigues; Verdurico,Lenita Camargo; Santos,Marcos Veiga dos; Barletta,Rafael Villela; Venturelli,Beatriz Conte; Vilela,Flávio Garcia.
The objective of this study was to evaluate the utilization of different sources of unsaturated long-chain fatty acids in diets for dairy cows during the transition period and early lactation on the milk fatty acid profile and composition of the protein fraction. Thirty-six Holstein cows were divided into three groups, fed the following diets: control (C); soybean oil (SO); and calcium salts of long-chain unsaturated fatty acids (CS). The milk samples utilized for analysis were obtained weekly from parturition to twelve weeks of lactation; each one of the samples originated from two daily milkings. Milk composition and total nitrogen, non-protein nitrogen and non-casein nitrogen levels were analyzed. The cows receiving the diet with calcium salts had lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calcium salts of fatty acids; Corn silage; Soybean oil.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100008
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Lipid and selenium sources on fatty acid composition of intramuscular fat and muscle selenium concentration of Nellore steers R. Bras. Zootec.
Pereira,Angélica Simone Cravo; Santos,Marcos Veiga dos; Aferri,Gabriela; Corte,Rosana Ruegger Pereira da Silva; Silva,Saulo da Luz e; Freitas Júnior,José Esler de; Leme,Paulo Roberto; Rennó,Francisco Palma.
The objective of this study was to evaluate the effect of lipid and selenium sources in diets for finishing Nellore steers on the fatty acid composition and selenium concentration of the longissimus muscle. Fifty Nellore steers (body weight = 458±39 kg) were assigned to one of six dietary treatments: 1) diet containing sunflower seed and inorganic selenium; 2) sunflower seed and organic selenium; 3) whole cottonseed and inorganic selenium; 4) whole cottonseed and organic selenium; 5) soybeans and inorganic selenium; and 6) soybeans and organic selenium. Diets were formulated with the same amount of nitrogen and calories and supplied once daily to steers in collective pens, with three animals per pen, for 120 d. At the end of the trial, steers were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Cattle; Longissimus; Soybean seed; Sunflower seed; Whole cottonseed.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001100009
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Organic and inorganic sources of zinc, copper and selenium in diets for dairy cows: intake, blood metabolic profile, milk yield and composition R. Bras. Zootec.
Cortinhas,Cristina Simões; Freitas Júnior,José Esler de; Naves,Julianne de Rezende; Porcionato,Marco Aurélio de Felicio; Silva,Luís Felipe Prada e; Rennó,Francisco Palma; Santos,Marcos Veiga dos.
The present study was carried out with the objective of evaluating the effects of feeding dairy cows with organic or inorganic sources of zinc (Zn), copper (Cu) and selenium (Se) on blood concentrations of these minerals, blood metabolic profiles, nutrient intake and milk yield and composition. Nineteen Holstein cows were selected and randomly assigned to two groups for receiving organic (n = 9) or inorganic (n = 10) sources of Zn, Cu and Se from 60 days before the expected date of calving to 80 days of lactation. Samples of feed, orts and milk were collected for analysis. Body condition score (BCS) was determined and blood samples were collected for analysis of Zn, Cu and Se concentrations, as well as for metabolic profile. Supplying organic or inorganic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chelate; Microminerals; Nutrition; Organic sources.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600023
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Parâmetros sanguíneos de vacas leiteiras suplementadas com diferentes fontes de gordura Ciência Rural
Freitas Júnior,José Esler de; Rennó,Francisco Palma; Silva,Luiz Felipe Prada e; Gandra,Jefferson Rodrigues; Maturana Filho,Milton; Foditsch,Carla; Venturelli,Beatriz Conte.
O objetivo deste trabalho foi avaliar a utilização de diferentes fontes de gordura nas rações de vacas em lactação e seus efeitos sobre o consumo de matéria seca e as concentrações dos parâmetros sangüíneos. Foram utilizadas 12 vacas da raça Holandês, agrupadas em três quadrados latinos balanceados 4x4 e alimentadas com as seguintes rações: 1) controle; 2) óleo de soja refinado; 3) grão de soja in natura; e 4) sais de cálcio de ácidos graxos (Megalac-E). As concentrações de colesterol total, colesterol, lipoproteína de baixa densidade (LDL) e colesterol de alta densidade (HDL) foram maiores (P<0,05) para as vacas alimentadas com as rações contendo fontes de gordura em relação à ração controle. As concentrações de uréia e nitrogênio ureico no soro foram...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lipídios; Enzimas hepáticas; Perfil metabólico; Lipidograma; Proteinograma.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000400032
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Productive performance and composition of milk protein fraction in dairy cows supplemented with fat sources R. Bras. Zootec.
Freitas Júnior,José Esler de; Rennó,Francisco Palma; Santos,Marcos Veiga dos; Gandra,Jefferson Rodrigues; Maturana Filho,Milton; Venturelli,Beatriz Conte.
The objective of this study was to evaluate the use of fat sources in rations for lactating cows on the productive performance and composition of milk protein fraction. Twelve Holstein cows were used, grouped in three balanced 4 × 4 Latin squares, fed with the following rations: control; refined soybean oil; whole raw soybean; and calcium salts of unsaturated fatty acid (Megalac-E). Dry matter and nutrient intake, and daily milk production were evaluated. The samples used to analyze milk composition were collected in two alternate days and were obtained from two daily milking. Milk composition and total nitrogen, non-protein nitrogen and non-casein nitrogen ratios were analyzed. The casein, serum protein and true protein ratios were obtained by difference....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fat supplementation; Intake; Milk production and composition; Non-protein nitrogen; True protein.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400021
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Productive performance and milk protein fraction composition of dairy cows supplemented with sodium monensin R. Bras. Zootec.
Gandra,Jefferson Rodrigues; Rennó,Francisco Palma; Freitas Júnior,José Esler de; Santos,Marcos Veiga dos; Silva,Luís Felipe Prada e; Araújo,Ana Paula Chaves de.
The objective of this work was to evaluate the levels of sodium monensin on lactating cows and their effects on productive performance and milk protein fraction composition. It was used 12 Holstein cows, distributed in four balanced 3 × 3 Latin squares, and fed three diets: one control without monensin, and two diets with monensin at the levels of 24 or 48 mg/kg DM added to the concentrate. Milk production was daily measured throughout the entire experimental period. The samples used for analysis of milk composition were collected on two alternated days from the two daily milking. Non-protein nitrogen, total nitrogen and non-casein nitrogen contents were directly evaluated in the milk, and casein, whey protein and true protein contents were indirectly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Casein; Dairy cows; Ionophores; Milk yield and composition; Productive efficiency.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800025
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Supplementation of diets for Santa Ines sheep with organic and inorganic zinc sources R. Bras. Zootec.
Vilela,Flávio Garcia; Zanetti,Marcus Antonio; Saran Netto,Arlindo; Freitas Júnior,José Esler de; Rennó,Francisco Palma; Venturelli,Beatriz Conte; Canaes,Taissa de Souza.
This research was conducted with objective to evaluate the effect of different zinc (Zn) sources and doses in the diet for Santa Ines sheep. Forty lambs at weaning, with 18.4 kg of body weight were supplemented with three different sources of zinc (zinc oxide (ZnO), zinc amino acid and zinc proteinate) and three doses of zinc (200, 400 and 600 mg/kg DM) added to the basal diet. At every 28 days, animals were weighted and blood samples were collected for analyses of zinc (Zn), alkaline phosphatase and immunoglobulin G (IgG) and M (IgM). At the end of experiment, liver samples were collected for determination of the hepatic zinc levels. Zinc was analyzed with atomic absorption spectrophotometer, while phosphatase alkaline and immunoglobulins G and M were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioavailability; Immunoglobulin; Lambs; Minerals.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900023
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Utilização de óleo de soja em rações para vacas leiteiras no período de transição: consumo, produção e composição do leite R. Bras. Zootec.
Santos,Anselmo Domingos Ferreira; Torres,Ciro Alexandre Alves; Rennó,Francisco Palma; Drumond,Mariana Resende Soares; Freitas Júnior,José Esler de.
O objetivo neste estudo foi avaliar o desempenho produtivo de vacas leiteiras sob suplementação com óleo de soja durante o período de transição. Foram utilizadas 20 vacas da raça Holandesa, multíparas e gestantes, distribuídas aleatoriamente em duas rações: controle, com 2,5% de extrato etéreo (EE) na matéria seca (MS); e gordura, com adição de 3,0% de óleo de soja e 5,5% de EE na MS. Os valores médios de consumo de MS e nutrientes não diferiram no período pré e pós-parto nas vacas das dietas controle e com óleo de soja, exceto no maior consumo de EE, em decorrência da maior concentração desse nutriente na dieta com óleo. Em virtude da maior densidade energética da ração com óleo de soja, as vacas apresentaram maior consumo de nutrientes digestíveis totais...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Consumo de matéria seca; Desempenho produtivo; Gordura dietética; Periparto.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700028
Registros recuperados: 17
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