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Níveis de lisina para leitoas selecionadas geneticamente para deposi o de carne magra, dos 30 aos 60 kg, mantendo constante a rela o entre lisina e metionina+cistina, treonina, triptofano, isoleucina e valina  [cached]
Fontes Dalton de Oliveira,Donzele Juarez Lopes,Oliveira Rita Flávia Miranda de,Conhalato Giane da Silva
Revista Brasileira de Zootecnia , 2000,
Abstract: Foram utilizadas 40 leitoas mesti as (Hampshire, Landrace Belga, Pietran) com peso inicial médio de 30,1±1,25 kg e alto potencial genético para deposi o de carne magra na carca a, para avaliar diferentes níveis de lisina. Foi usado delineamento de blocos ao acaso com quatro tratamentos, cinco repeti es e dois animais por unidade experimental. Os tratamentos corresponderam a uma ra o basal com 17,5% de proteína bruta, suplementada com quatro níveis de L-lisina HCl, resultando em ra es com 1,00; 1,10; 1,20; e 1,30% de lisina. As ra es foram suplementadas com níveis crescentes de treonina, metionina, isoleucina, valina e triptofano, resultando em ra es nas quais a rela o entre estes aminoácidos e a lisina se manteve constante em 67, 62, 60, 68 e 19%, respectivamente, com base na digestibilidade verdadeira. N o se observou efeito dos tratamentos sobre consumo de ra o, ganho de peso diário e concentra o de uréia no soro sangüíneo dos animais, entretanto, os animais pareceram ter atingido o potencial genético máximo para ganho de peso no nível de lisina de 1,10% (0,329%/Mcal de ED), correspondente a um consumo de lisina de 22 g/dia. Observou-se efeito linear sobre o consumo de lisina diário, que aumentou, e a convers o alimentar, que reduziu com o aumento do nível de lisina da ra o. O nível de 1,30% (0,389%/Mcal de ED) ou 1,19% (0,356%/Mcal de ED), correspondente a um consumo de lisina total e digestível, respectivamente, de 24 e 22,1 g/dia, proporcionou os melhores resultados de convers o alimentar de leitoas dos 30 aos 60 kg, quando se utilizou o conceito de proteína ideal na formula o das ra es experimentais.
Níveis de lisina para leitoas selecionadas geneticamente para deposi??o de carne magra na carca?a, dos 15 aos 30 kg
Fontes, Dalton de Oliveira;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Silva, Francisco Carlos de Oliveira;Lopes, Darci Clementino;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000100012
Abstract: fifty hybrid gilts, with high genetic potential for lean gain and initial and final weight of 15.39 ± 0.59 and 30.93 ± 1.72 kg, respectively, were used to evaluate diet with different levels of lysine. an experimental design of randomized blocks, with five treatments, five replicates and two animals per experimental unit, was used. the treatments corresponded to a basal diet with 19% crude protein, supplemented with five levels of hcl-l-lisine, that resulted in diets with 0.95, 1.05, 1.15, 1.25 and 1.35% of lysine. the daily weight gain and daily lysine intake linearly increased with the dietary lysine level. there was quadratic effect of lysine levels on daily feed intake and feed/gain ratio, that increased to the lysine level of 1.26% (0.365%/mcal of de) or 1.13% (0.328%/mcal of de) of true digestible lysine, corresponding to the total and digestible lysine estimated intake of 14.62 and 13.12 g/day, respectively. there was no effect of treatments on protein and water percentage in carcass and on blood serum urea levels. the treatments influenced quadraticly the fat percentage and fat deposition rate in carcass, that decreased until 1.25 and 1.18% lysine level, respectively. the protein deposition linearly increased with the dietary lysine level. it was concluded that gilts from 15 to 30 kg require 1.26% of total lysine or 1.13% of digestible lysine, corresponding to a total and digestible lysine estimated intake of 14.6 and 13.1 g/day, respectively.
Níveis de lisina para leitoas selecionadas geneticamente para deposi??o de carne magra na carca?a, dos 30 aos 60 kg
Fontes, Dalton de Oliveira;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Lopes, Darci Clementino;Ferreira, Aloízio Soares;Silva, Francisco Carlos de Oliveira;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000100011
Abstract: fifty hybrid gilts, with high genetic potential for lean gain and initial and final average weight of 30.0 ± 0.45 and 59.9 ± 2.53 kg, respectively, were used in an experiment to evaluate diet with different levels of lysine. an experimental design of randomized blocks, with five treatments, five replicates and two animals per experimental unit, was used. the treatments corresponded to a basal diet with 17.5% crude protein, supplemented with five levels of hcl-l-lysine, resulting in diets with 0.80, 0.90, 1.00, 1.10, and 1.20% of total lysine. there were no effects of treatments on daily weight gain and serum urea concentration, however, daily feed intake and daily lysine intake increased linearly with the dietary lysine level. there was a quadratic effect of lysine levels on feed:gain ratio, that increased up to the total lysine level of 1.16% (0.347%/mcal of de) or 1.05% (0.315%/mcal of de) of digestible lysine, corresponding to the total and digestible lysine intake of 21.8 and 19.7 g/day, respectively. there was no effect of treatments on protein percentage, however, the water percentage in carcass linearly decreased. there was quadratic effect of treatments on fat percentage and fat deposition rate in carcass, that decreased up to the lysine level of 1.09 and 1.12%, respectively. the protein deposition rate improved quadraticly up to the level of lysine of 1.04%. it was concluded that gilts with high genetic potential for lean gain, from 30 to 60 kg require 1.16% of total lysine or 1.05% (0.315%/mcal of de) of true digestible lysine, corresponding to total and digestible lysine intake of 21.8 and 19.72 g/day, respectively, for maximal performance. the level of total lysine of 1.04% or 0,93% of digestible lysine proportioned the best protein deposition rate.
Níveis de lisina para leitoas selecionadas geneticamente para deposi??o de carne magra, dos 30 aos 60 kg, mantendo constante a rela??o entre lisina e metionina+cistina, treonina, triptofano, isoleucina e valina
Fontes, Dalton de Oliveira;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Conhalato, Giane da Silva;Pereira, Mariana Arag?o;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000300020
Abstract: forty crossbred gilts (hampshire, belgium landrace, pietran) with initial average weight of 30.1±1.25 kg and high genetic potential for lean meat deposition were used to evaluate different lysine levels. a randomized block experimental design, with four treatments, five replications and two animal per experimental unit, was used. the treatments corresponded to the basal diet with 17.5% crude protein, supplemented with l-lysine-hcl, resulting in diets with 1.00, 1.10, 1.20 and 1.30% of lysine. the diets were supplemented with increasing levels of threonine, methionine, isoleucine, valine and tryptophan, resulting in diets where the amino acids:lysine ratio was constant in 67, 52, 60, 68 and 19%, respectively, based on the true digestibility. there was no effect of treatments on feed intake, daily weight gain and blood serum urea concentration of animals, however, the animals seems to reach their maximum genetic potential for weight gain at lysine level of 1.10% (0.329%/mcal de de), corresponding to a lysine intake of 22 g/day. there was linear effect on daily lysine intake, that increased, and on feed:gain ratio that reduced with increasing dietary lysine level. the level of 1.30% (0.389%/mcal of de) or 1.19% (0.356%/mcal of de), corresponding to a total and digestible lysine intake of 24 and 22.1 g/day, respectively, showed the best results of feed:gain ratio of gilts from 30 to 60 kg, when the ideal protein concept was used in the diet formulation.
Planos de nutri o para leitoas com alto potencial genético para deposi o de carne magra dos 65 aos 105 kg  [cached]
Kill Jo?o Luís,Donzele Juarez Lopes,Oliveira Rita Flávia Miranda de,Ferreira Aloízio Soares
Revista Brasileira de Zootecnia , 2003,
Abstract: Para avaliar o efeito dos planos de nutri o, com base em níveis de lisina, sobre o desempenho e as características de carca a de leitoas em termina o, utilizaram-se 96 leitoas híbridas comerciais de alto potencial genético para deposi o de carne magra, com peso médio inicial de 65,93 ± 2,78 kg e final de 105,50 ± 2,18 kg. Os animais foram distribuídos em um delineamento experimental de blocos ao acaso, com quatro tratamentos (planos de nutri o), doze repeti es e dois animais por baia, considerada a unidade experimental. Os tratamentos consistiram de planos nutricionais (estabelecidos por níveis seqüenciais de lisina) para duas diferentes faixas de peso, 65 a 95 kg e 95 a 105 kg. As ra es foram isoenergéticas e os níveis de lisina foram obtidos variando a propor o entre o milho e o farelo de soja da ra o. N o foi observado efeito dos tratamentos sobre o ganho de peso diário e sobre o consumo de ra o diário. Houve efeito dos planos de nutri o sobre a convers o alimentar, sendo que o plano 3 propiciou melhora de 7,86% em rela o ao plano 1, n o diferindo dos demais. O consumo de lisina aumentou de acordo com a eleva o dos níveis de lisina dos planos de nutri o. No plano 4, o consumo de lisina foi superior em 25,43%, em rela o aos demais planos. N o houve diferen a dos planos de nutri o sobre a taxa de convers o em músculo, convers o alimentar em músculo, comprimento de carca a, espessura de toucinho na regi o entre a última e a penúltima vértebra lombar, a espessura de toucinho a 6,5 cm da linha dorso-lombar (P2), o rendimento de carca a, o rendimento de carne magra, o rendimento de gordura e sobre o rendimento de pernil. O estudo da análise econ mica indicou que o plano de nutri o 2, proporcionou o melhor retorno econ mico sobre o custo da ra o. Portanto, conclui-se que o plano de nutri o 3 (1,00 - 0,90% de lisina) proporcionou os melhores resultados de desempenho e características de carca a.
Níveis de Treonina em Ra es para Leitoas com Alto Potencial Genético para Deposi o de Carne Magra dos 30 aos 60 kg
Rodrigues Nair Elizabeth Barreto,Donzele Juarez Lopes,Oliveira Rita Flávia Miranda de,Lopes Darci Clementino
Revista Brasileira de Zootecnia , 2001,
Abstract: Este experimento foi conduzido para avaliar níveis de treonina total em ra es para leitoas dos 30 aos 60 kg. Quarenta fêmeas, com peso inicial médio de 29,2 ± 1,4 kg, foram utilizadas em delineamento experimental em blocos casualizados, com cinco tratamentos (0,60; 0,65; 0,70; 0,75; e 0,80% de treonina total), quatro repeti es e dois animais por unidade experimental. A ra o basal com 18% de proteína bruta e 0,928% de lisina total, atendeu as exigências das leitoas, de acordo com o NRC (1988), exceto de treonina. A ra o basal foi suplementada com L-treonina, resultando em ra es experimentais que proporcionaram rela es treonina digestível:lisina digestível calculadas de 62, 68, 74, 80 e 86%, respectivamente. Ao final do experimento, quando os animais atingiram peso médio de 59,98 ± 2,9 kg, foram coletadas amostras de sangue, para análise de uréia no soro sangüíneo, e um animal por unidade experimental foi abatido para avaliar a taxa de deposi o de proteína na carca a. Observou-se efeito dos níveis de treonina sobre o ganho de peso dos animais, que aumentou de forma linear. O consumo de ra o aumentou quadraticamente até o nível de 0,66% de treonina da ra o. Os tratamentos influenciaram a convers o alimentar (CA), que reduziu até o nível de 0,70%. A rela o estimada da treonina digestível:lisina digestível verdadeira, no nível que proporcionou os melhores resultados de convers o alimentar, correspondeu a 75%. N o foi observado efeito dos tratamentos sobre o teor de uréia no soro sangüíneo. Os níveis de treonina também influenciaram a taxa de deposi o de proteína na carca a, que aumentou de forma quadrática até o nível de 0,70%. Concluiu-se que leitoas com alto potencial genético dos 30 aos 60 kg exigem 0,70% de treonina total, correspondente a 0,62% de treonina digestível, e a uma rela o estimada treonina digestível:lisina digestível verdadeira de 75%.
Digestible lysine requirement of gilts with high genetic potential lean deposition, in carcass from 15 to 30 kg Exigência de lisina digestível de fêmeas suínas selecionadas para deposi o de carne magra, na carca a dos 15 aos 30 kg  [cached]
Mariana Cruz Rossoni,Juarez Lopes Donzele,Francisco Carlos Oliveira Silva,Rita Flávia Miranda de Oliveira
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: Fifty gilts were used, with initial weight of 15.11 + 1.34 kg, distributed in a random block experimental design, with five treatments (digestible lysine levels), five replicates and two animals per stall, which were considered one experimental unit. The criteria for the formation of the blocks were the animal initial weight. Treatments consisted in a basal diet with 19.41% of CP e 3,221 kcal of ME/kg, supplemented with L-lysine HCl, resulting on diets with 0.88, 0.98, 1.08, 1.18 and 1.28% of digestible lysine. Diets were supplemented with increasing levels of industrial aminoacids, resulting on diets with constant ratio of essential aminoacids and lysine, based on true digestible. There was no effect of levels of digestible lysine on daily feed intake and daily weight gain. A quadratic effect (P < 0.06) was observed on feed conversion that improved until an estimated level of 1.08% of digestible lysine, which corresponded to a digestible lysine intake of 11.60 g/day. The level of 1,08% of digestible lysine, which corresponded to a digestible lysine intake of 11.60 g/day, provided the best performance results for gilts and a high genetic potential for lean deposition from 15 to 30kg. Foram utilizadas 50 fêmeas suínas, com peso inicial de 15,11 + 1,34 kg, distribuídas em delineamento experimental de blocos ao acaso, com cinco tratamentos (níveis de lisina digestível), cinco repeti es e dois animais por baia, o que constituiu a unidade experimental. Como critério para forma o dos blocos, foi utilizado o peso dos animais. Os tratamentos corresponderam a uma ra o basal com 19,41% de PB e 3.221 kcal de EM/kg, suplementada com L-lisina HCl, resultando em ra es com 0,88, 0,98, 1,08, 1,18 e 1,28% de lisina digestível. As ra es foram suplementadas com níveis crescentes de aminoácidos industriais, resultando em ra es com rela es constantes entre os aminoácidos essenciais e a lisina, com base na digestibilidade verdadeira. N o foi observado efeito dos níveis de lisina digestível sobre o consumo de ra o e ganho de peso diário. Observou-se efeito quadrático (P<0,06) dos tratamentos sobre a convers o alimentar, que melhorou até o nível estimado de 1,08% de lisina digestível, correspondendo a um consumo de lisina digestível de 11,60 g/dia. O nível de 1,08% de lisina digestível, correspondente a um consumo de 11,60 g/dia de lisina digestível, proporcionou os melhores resultados de desempenho para fêmeas suínas de alto potencial genético, para deposi o de carne magra na carca a dos 15 aos 30 kg.
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  [cached]
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 lisina para leitoas dos 6 aos 16 kg com alto potencial para deposi??o de carne magra na carca?a
Moreira, Huedy Flavio Vasconcelos;Fontes, Dalton de Oliveira;Silva, Francisco Carlos de Oliveira;Silva, Martinho de Almeida e;Fontes, Flávia Adriana Pereira Vieira;Gomes, Flávio Francisco Edson;Rossoni, Mariana Cruz;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000400016
Abstract: the experiment was carried out to establish the lysine requirement of females swine, from 6 to 16 kg live weight. sixty crossbreed gilts with high genetic potential for lean gain and average initial and final weight of 6.0 ± 0.21 kg and 16.0 ± 0.32 kg, respectively, were assigned to a randomized blocks design, with five treatments, four replications and three animals per experimental unit. the treatments corresponded to a basal diet with 21.60% crude protein, supplemented with five levels of hcl-l- lysine, resulting in diets with 1.3; 1.4; 1.5; 1.6 and 1.7% of total lysine. there was no effect of treatments on daily weight gain. there was quadratic effect of lysine levels on daily feed intake, daily lysine intake and feed/gain ratio, that increased to the estimated lysine level of 1.56%. there was no effect of treatments on protein percentage and carcass protein deposition rate, otherwise, fat percentage and carcass water and fat deposition rate increased linearly. it was concluded that gilts from 6 to 16 kg, with high genetic potential for lean gain, require 1.56% total lysine or 1.38% digestible lysine to achieve best development and 1.70% total lysine or 1.50% digestible lysine for the best carcass composition, corresponding, respectively, to an estimated feed intake of 8.46 and 10.06 g total lysine/day.
Níveis de Treonina em Ra??es para Leitoas com Alto Potencial Genético para Deposi??o de Carne Magra dos 30 aos 60 kg
Rodrigues, Nair Elizabeth Barreto;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Lopes, Darci Clementino;Ferreira, Aloízio Soares;Rodrigues Filho, Moacir;Orlando, Uislei Antonio Dias;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000800013
Abstract: this experiment was conducted to evaluate the levels of total threonine in diets for gilts from 30 to 60 kg of live weight. forty females, with initial average weight of 29.2 ± 1.4 kg, were used in an experimental design of randomized blocks, with five treatments (0.60; 0.65; 0.70; 0.75 and 0.80% of total threonine), four replications and two animals per experimental unit. the basal diet with 18% of crude protein and 0.928% of total lysine, attended the requirements of gilts according to nrc (1988), except for threonine. the basal diet was supplemented with l-threonine resulting in experimental diets that supplied a calculated digestible threonine:digestible lysine ratio of 62, 68, 74, 80 and 86%, respectively. the experimental diets and water were supplied to gilts ad libtum. at the final of experimental period, when gilts reached the average weight of 59.98 ± 2.9 kg, were collected blood sample to determinate the level of urea in blood serum and one animal per experimental unit was slaughtered to evaluate the protein deposition rate. it was observed effect of threonine levels on weight gain of animals, that linearly increased. feed intake quadratically increased up to 0.66% of threonine in diet. the treatments influenced the feed:gain ratio that reduced until level of 0.70%. the calculated ratio of true digestible threonine:true digestible lysine at level that proposed the best values of feed:gain ratio, corresponded to 75%. it was not observed effect of treatments on level of urea in blood serum. the dietary levels of threonine also influenced the protein deposition rate, that quadractly increased of way until the level of 0.70%. it was concluded that gilts with high genetic potential, from 30 to 60 kg live weight require 0.70% of total threonine and a calculated ratio of true digestible threonine:lysine of 75%.
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