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Search Results: 1 - 10 of 236301 matches for " Francisco Carlos de Oliveira;Siqueira "
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Digestible lysine requirements for barrows with high genetic potential for lean Exigência de lisina digestível para suínos machos castrados, dos 30 aos 60 kg, de alto potencial genético para deposi o de carne magra na carca a
Alexandre Luiz Siqueira de Oliveira,Juarez Lopes Donzele,Márvio Lob?o Teixeira de Abreu,Francisco Carlos Oliveira Silva
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: Fifty barrows with high genetic potential for lean gain in the carcass and initial body weight of 29.9 1.57 kg were used to evaluate the effect of feeding different lysine levels on performance and carcass protein deposition rate. A randomized block experimental design, with five treatments, five replicates and two animals per replicate was used. Treatments corresponded to five digestible lysine levels (0.70, 0.80, 0.90, 1.00, and 1.10%) with variable proportions of corn and soybean meal. Animals were kept in the experiment until they reached the final body weight of 60.5 1.74 kg. Linear (P<0.01) increasing effect was observed for the daily weight gain (DWG), but the linear response plateau model was that better fitted to the DWG data, that stabilized in a plateau starting from the level of 1.02% of digestible lysine. Significant linear effects were observed for the feed conversion, daily lysine intake and daily protein deposition by increasing dietary lysine levels but no diet effect was found for the daily feed intake. Digestible lysine level of 1.02%, corresponding to a digestible lysine intake of 19.50g/day, provides the best results of performance and protein deposition in barrows with high genetic potential for lean meat deposition in the carcass in the phase from 30 to 60 kg. Foram utilizados 50 suínos machos castrados de alto potencial genético para deposi o de carne magra na carca a e peso inicial de 29,9 1,57 kg, para avaliar diferentes níveis de lisina sobre o desempenho e as características de carca a. Foi usado delineamento de blocos ao acaso, com cinco tratamentos, cinco repeti es e dois animais por repeti o. Os tratamentos consistiram de cinco níveis de lisina digestível (0,70; 0,80; 0,90; 1,00 e 1,10%), obtidos variando-se a propor o de milho e farelo de soja nas ra es. Os animais permaneceram no experimento até atingirem o peso final de 60,5 1,74 kg. Os níveis de lisina influenciaram de forma linear (P<0,01) crescente o ganho de peso diário (GPD), mas o modelo “Linear Response Plateau” (LRP) foi o que melhor se ajustou aos dados do GPD, estimando em 1,02% o nível a partir do qual ocorreu um plat . A convers o alimentar, o consumo de lisina diário e a deposi o de proteína diária aumentaram de forma linear em raz o dos níveis de lisina da ra o, que, no entanto, n o influenciaram o consumo de ra o diário. Concluiu-se que o nível de 1,02% de lisina digestível, correspondente a um consumo de 19,50 g/dia de lisina digestível (0,29%/Mcal de ED), proporciona os melhores resultados de desempenho e deposi o protéica em suínos mac
Níveis de proteína bruta e suplementa??o de aminoácidos em ra??es para leitoas dos 30 aos 60 kg mantidas em ambiente de alta temperatura
Orlando, Uislei Antonio Dias;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Silva, Francisco Carlos de Oliveira;Generoso, Rafaela Antonia Ramos;Siqueira, Jefferson Costa de;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000700016
Abstract: an experiment was conduced to evaluate crude protein (cp) levels and amino acid supplementation for gilts from 30 to 60 kg maintained in a high environmental temperature (air temperature of 30oc; relative humidity of 66.1% and bghi of 79.7). fifty crossbreed gilts (landrace x large white) with an average initial weight of 30.2 kg were allotted to a randomized experimental design with five treatments and five replications and two animals per experimental unity. the treatment consisted of five levels o cp (19, 18, 17, 16, and 15%) in the ration and of the supplementation with lysine, methionine, tryptophan, threonine and valine to maintain the same protein quality of the ration. the experimental diets were given ad libitum until the end of the experiment when the animals reached the average weight of 60.1 kg. no effect of dietary level of crude protein was observed on pig performance (feed intake, weight gain and feed:gain ratio). neither carcass protein deposition was influenced by reduction of dietary of dietary level of cp. animals fed 18% cp showed the best carcass protein deposition. the protein levels did not influence the absolute and relative weights of the pig organs. dietary cp level can be reduced by 4% (from 19 to 15% of cp) without any effect on performance of gilts from 30 to 60 kg maintained in a high environmental temperature since that the rations be adequately supplemented with all essential limiting amino acids.
Exigência de lisina digestível para suínos machos castrados de alto potencial genético para deposi??o de carne magra na carca?a dos 15 aos 30 kg
Oliveira, Alexandre Luiz Siqueira de;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Abreu, Márvio Lob?o Teixeira de;Ferreira, Aloízio Soares;Silva, Francisco Carlos de Oliveira;Haese, Douglas;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000800020
Abstract: fifty barrows with high genetic potential for lean gain averaging initial body weight (bw) of 15.4 ± 1.02 kg were used to determine the digestible lysine requirements, considering performance and carcass protein deposition rate. the experiment was analyzed as a complete block design with five treatments, five replicates and two animals per replicate. treatments consisted of five digestible lysine levels (0.80, 0.90, 1.00, 1.10, and 1.20%) obtained with different dietary amounts of corn and soybean meal. animals were kept in the experiment until they reached final bw of 30.0 ± 1.93 kg. it was observed quadratic effect of treatments on daily weight gain, that increased until the 1.10% estimated level. linear effect of dietary digestible lysine levels on feed:gain, protein deposition and daily lysine intake was observed. no treatment effect on daily feed intake was noticed. barrows with high genetic potential for lean gain in the carcass from 15 to 30 kg require 1.10% of dietary digestible lysine that is correspondent to a 12.05 g/day digestible lysine intake.
Lisina em ra??es para suínos machos castrados selecionados para deposi??o de carne magra na carca?a dos 95 aos 110 kg
Oliveira, Alexandre Luiz Siqueira de;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Lopes, Darci Clementino;Moita, Antonio Marcos Souto;Silva, Francisco Carlos de Oliveira;Freitas, Letícia Silva de;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000200012
Abstract: sixty barrows from crossing between commercial hybrids with an average initial weight of 95.7 ± 0.80 kg and an average final weight of 109.8 ± 1.13 kg were used to evaluate different dietary lysine levels on performance and on carcass characteristics. the experimental design used was a randomized blocks with five treatments, six replicates and two animals per replicate. the treatments corresponded to a basal diet with 13.7% of crude protein, 3367 kcal de/kg supplemented with five l-lysine-hcl levels, resulting in diets with 0.50; 0.60; 0.70; 0.80 and 0.90% of total lysine. the daily feed intake reduced by linear way with the increase of lysine level in diet. however, it was showed highest lysine consumption with increase of dietary aminoacid concentration. it was verified quadratic effect of treatments on the feed:gain ratio which improved until the level of 0.76% of lysine level and on feed:lean gain that reduced by linear way. however the adjusted data by linear response plateau indicated the level of 0.79% to the best feed:lean gain. the weight gain, carcass lenght, backfat thickness, ham yield, lean growth yield and loin eye area were not influenced by treatments. for the genotype studied, it was concluded that barrows from 95 to 110 kg require 0.76% of total lysine in diet, corresponding to a daily lysine intake of 23.8 g.
Exigências de treonina digestível para leitoas mantidas em ambiente termoneutro dos 15 aos 30 kg
Saraiva, Edilson Paes;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Silva, Francisco Carlos de Oliveira;Siqueira, Jefferson Costa de;Manno, Maria Cristina;Oliveira, Will Pereira de;Nunes, Christiane Garcia Vilela;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800019
Abstract: this study was carried out to evaluate the requirements of digestible threonine in diets of gilts from 15 to 30kg, maintained in thermoneutral environment. seventy crossbreed gilts with an initial weight of 15.1 ± 0.4 kg were used in a randomized blocks design, with five treatments (levels of digestible threonine), seven replicates and two animals per experimental unity. the treatments corresponded to the levels of 0.54, 0.58, 0.61, 0.65, e 0.698% of digestible threonine. digestible threonine levels in the diet increased the daily weight gain in a quadratic way up to the level of 0.61% and the feed:gain ratio up to the level of 0.62%. protein and fat deposition rates also increased in a quadratic way reaching maximum value up to the level of 0.61%. a linear effect of the treatments was evidenced on the absolute and relative weights of the intestine. the calculated level of 0.62% of digestible threonine corresponding to a relation with digestible lysine of 67% and a daily intake of 7.11 g, provided better performance of gilts maintained in a thermoneutral environment from 15 to 30 kg.
Exigências de aminoácidos sulfurados digestíveis para suínos machos castrados, mantidos em ambiente de alta temperatura dos 15 aos 30 kg
Vaz, Roberta Gomes Mar?al Vieira;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Ferreira, Aloízio Soares;Silva, Francisco Carlos de Oliveira;Kiefer, Charles;Siqueira, Jefferson Costa de;Rezende, Wilkson de Oliveira;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000500025
Abstract: sixty swine (landrace x large white) with initial weight of 14.97 ± 0.33 kg and 50.36 ± 3.29 days old were allotted to a blocks randomized experimental design, with five treatments (0.465, 0.511, 0.558, 0.605, and 0.652% digestible methionine + and cystine)and six replicates of two animals, to determine the sulphurous amino acids requirements for barrows on a high temperature environment from 15 to 30 kg. diets and water were fed ad libitum until the end of the experimental period, when the animals reached the weight of 29.87 ± 0.52 kg. the average temperature inside the room was maintained in 30.9 ± 0.7oc and the relative humidity in 67.5 ± 7.2%. the black globe humidity index calculated in the period was 81.2 ± 1.2. linear increasing effect of dietary digestible methionine + cystine levels on daily weight gain and linear decreasing effect on feed:gain ratio were observed. no effects of treatments on daily feed intake were observed. quadratic effect of treatments on fat deposition rate, that decreased by 0.508%, and increasing linear effect on protein deposition rate were observed. it was concluded that the dietary digestible sulphurous amino acids requirement for barrows on a high temperature environment from 15 to 30 kg is of 0.558% digestible methionine + cystine, that corresponds to 60% digestible methionine and cystine:digestible lysine ratio.
Níveis de lisina digestível em ra??es, utilizando-se o conceito de proteína ideal, para suínos machos castrados de alto potencial genético dos 15 aos 30 kg
Abreu, Márvio Lob?o Teixeira de;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Oliveira, Alexandre Luis Siqueira de;Silva, Francisco Carlos de Oliveira;Moita, Ant?nio Marcos Souto;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000400014
Abstract: fourty barrows with high genetic potential for lean gain averaging initial and final body weights of 15.76 + 0.93 kg and 30.23 + 1.56 kg, respectively, were used to evaluate the effect of digestible lysine levels, using the ideal protein concept, on the performance and carcass composition. the treatments were composed of a basal diet containing 19.46% crude protein and 3,280 kcal of me/kg, that were supplemented with different levels of hcl-l-lysine, resulting in diets with 0.90, 1.00, 1,10, and 1.20% of digestible lysine. the diets were supplemented with increasing levels of synthetic amino acids, resulting in diets with ratios of methionine + cystine, threonine, tryptophan and valine:lysine constant in 60, 60, 19 e 69%, respectively, based on the true digestibility. no treatment effects on feed intake, concentration of plasma urea and percentages of water, protein and fat in the carcass were observed in this trial. however, significant quadratic effects on weight gain and feed:gain ratio with quadractic maximum and minimum of 1.10 and 1.12% of lysine, respectively, were detected. intake of digestible lysine increased linearly among treatments. the depositions of protein and fat in the carcass answered quadractily with quadratic maxima at 1.12 and 1.08%, respectively. the level of digestible lysine that provided the best results of performance and carcass characteristics of barrows with high genetic potential from 15 to 30 kg was of 1.12% of true digestible lysine, corresponding to a digestible lysine intake of 12.03 g/day (3.42 g of lys/mcal of me).
Níveis de treonina digestível em ra??es para leitoas dos 15 aos 30 kg mantidas em ambiente de alta temperatura
Saraiva, Edilson Paes;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Silva, Francisco Carlos de Oliveira;Vaz, Roberta Gomes Mar?al Vieira;Siqueira, Jefferson Costa;Manno, Maria Cristina;Oliveira, Will Pereira de;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200021
Abstract: this trial was conducted to evaluate the dietary levels of digestible threonine for growing gilts on heat stress environment. seventy crossbreed gilts averaging initial weight of 14.9 ± 0.56 kg were assigned to a complete randomized blocks design with five treatments (levels of digestible threonine) of seven replications (two animals per experimental unity). the treatments consisted of the following dietary digestible threonine levels: 0.538, 0.577, 0.614, 0.651, and 0.688%. daily weight gain and threonine intake linearly increased as the dietary threonine level increased, whereas daily feed intake was not affected. although feed:gain ratio linearly changed with the treatments, the best dietary digestible threonine level was estimated in 0.587%. daily depositions of protein and fat in the carcass and absolute and relative weights of the evaluated organs were not affected by the treatments. it was concluded that gilts from 15 to 30 kg on heat stress environment require 0.587% of digestible threonine in the diet to obtain better feed:gain ratio, leading to a threonine digestible: digestible lysine ratio of 63%.
Níveis de proteína bruta e suplementa??o de aminoácidos em ra??es para leitoas mantidas em ambiente de conforto térmico dos 30 aos 60 kg
Orlando, Uislei Antonio Dias;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Ferreira, Aloízio Soares;Silva, Francisco Carlos de Oliveira;Generoso, Rafaela Antonia Ramos;Vaz, Roberta Gomes Mar?al Vieira;Siqueira, Jefferson Costa de;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000100017
Abstract: an experiment was conduced to determine the crude protein (cp) level in diets with amino acids supplementation for gilts maintained in a thermal comfort environment. fifty crossbreed crossbred gilts (landrace x large white) with initial average weight of 30.1 kg were allotted to a completely randomized experimental design, with five treatments (19, 18, 17, 16 and 15% of cp with supplementation of lysine, methionine, tryptophan, threonine and valine to maintain the same protein quality) five replicates and two animals per experimental unit. the experimental rations were fed ad libitum until the end of the experiment, when the animals reached the average weight of 60.3 kg. the cp level of the ration influenced the daily weight gain and the feed:gain ratio however the treatments did not influence the daily feed intake. the protein deposition (pd) did not change from 19 to 16% of cp of the diet. however the animals that fed diet with smaller level showed the lowest value of pd. the treatments did not influence the absolute and relative weights of all evaluated organs. it was concluded that the crude protein level, for gilts from 30 to 60 kg, maintained in thermal comfort environment can be reduced from 19 to 15% with no negative effect on performance since rations are supplemented with limiting essential amino acids
Níveis de proteína bruta e suplementa??o de aminoácidos em ra??es para leitoas mantidas em ambiente termoneutro dos 60 aos 100 kg
Orlando, Uislei Antonio Dias;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Ferreira, Rony Antonio;Silva, Francisco Carlos de Oliveira;Vaz, Roberta Gomes Mar?al Vieira;Siqueira, Jefferson Costa de;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200020
Abstract: a trial was conduced to evaluate decreasing levels of cp with amino acid supplementation on performance of gilts on thermoneutral environment. thirty-five crossbreed gilts (landrace x large white) averaging initial weight of 60.5 kg were allotted to a complete randomized design with five treatments (17.3, 16, 14.7, 13.4 and 12.1% of cp) of seven replications (one animal per experimental unit). the experimental diets were fed ad libitum until the end of the experiment when the animals reached the average weight of 100.6 kg. no effect of decreasing dietary levels of crude protein on performance (feed intake, weight gain and feed gain ratio) was observed. decreasing dietary cp levels did not affect the carcass characteristics (carcass length, loin eye area, backfat thickness and carcass, lean growth, fat and ham yield), but affected the relative and absolute weights of liver and the greatest value was observed in animals fed diet with 16.0% of cp. decreasing dietary cp levels from 17.3 to 12.1% for gilts from 60 to 100 kg on thermoneutral environment did not affect performance, since diets are supplemented with limiting essential amino acids.
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