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Search Results: 1 - 10 of 41274 matches for " Uislei Antonio Dias;Vaz "
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Níveis de proteína bruta e suplementa??o de aminoácidos em dietas para leitoas mantidas em ambiente de alta temperatura dos 60 aos 100 kg
Orlando, Uislei Antonio Dias;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Ferreira, Rony Antonio;Vaz, Roberta Gomes Mar?al Vieira;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000500012
Abstract: this experiment was conduced to determine the level of cp with amino acid supplementation in diets to gilts under high environmental temperature in finishing phase. thirty-five crossbreed gilts (landrace x large white) with an average initial weight of 60.3 kg were allotted in a randomized experimental design with five diets (17.3, 16, 14.7, 13.4, and 12.1% cp) seven replications and one animal by experimental unity. the experimental diets were supplied ad libitum until the end of the experiment when the animals reached the average weight of 100.3 kg. the average temperature inside the room was kept in 30.6oc and the relative humidity in 71%. the black globe humidity index calculated in the period was 81. not effect was observed for the reduction of cp level of the diet on the studied performance characteristics (feed intake, weight gain and feed gain ratio). the carcass characteristics (carcass length; loin eye area; backfat thickness and yield of carcass, lean meat, fat and ham) also were not influenced by the cp reduction in the diets. the cp levels and supplementation of amino acids in the dieta influenced the relative and absolute weight of intestine. smaller values were observed in animals fed diet with smaller level of cp (12.1%). the reduction of cp level in the diet from 17.3 to 12.1% did not harms the performance of gilts maintained in a high environmental temperature from 60 to 100 kg since the diets are properly supplemented with limiting essential amino acids.
Efeito da temperatura ambiente sobre o desempenho e as características de carca?a de frangos de corte dos 22 aos 42 dias
Oliveira, Gisele Andrade de;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Cecon, Paulo Roberto;Vaz, Roberta Gomes Mar?al Vieira;Orlando, Uislei Antonio Dias;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000500020
Abstract: this study was conducted to evaluate the effect of environmental temperature on performance and carcass characteristics of male broilers in the period from 22 to 42 days old. three hundred and thirty-six male avian farm broilers, averaging 624 g were allotted to a randomized experimental design, with four treatments (temperatures of 16, 20, 25 and 32oc). the treatment 1 consisted of 12 replicates and the others of 24 replicates, all with four birds per experimental unity. the treatments affected weight gain, feed intake and metabolizable energy intake that quadractly increased until the estimated temperatures of 24.4, 19.1 and 19.1oc, respectively. feed:gain ratio also changed in a quadratic way, increasing until the estimated temperature of 26.3oc. the treatments influenced the carcass and breast yield that changed in a linear way as the temperature increased from 16 to 32oc. thigh yield changed in a quadratic way, increasing until the estimated temperature of 19.4oc. the absolute weights of heart, kidney and gizzard and the relative weights of heart and gizzard were affected by the environmental temperatures and were higher in cold environment (16oc) and smaller in the hot environment (32oc). the relative weight of kidney linearly increased as the temperature increase from 16 to 32oc. however, no treatment effect on absolute and relative weights of proventriculus was observed. it was concluded that the best results of weight gain and absolute weights of carcass, breast and thigh are obtained when the birds are reared on environmental temperatures from 22.3 to 24.7oc. environmental temperatures bellow or above these values affect negatively weight gain and absolute weights of carcass, breast and thigh.
Níveis de lisina digestível em ra??es, em que se manteve ou n?o a rela??o aminoacídica, para frangos de corte de 1 a 21 dias de idade, mantidos em estresse por calor
Valerio, Sandra Roseli;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Albino, Luiz Fernando Teixeira;Orlando, Uislei Antonio Dias;Vaz, Roberta Gomes Mar?al Vieira;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000200015
Abstract: two trials were conducted to evaluate the effects of digestible lysine levels in diets maintaining or not the relationship of amino acids, on performance of broilers from 1 to 21 days, kept under heat stress. a completely randomized experimental design was used in both trials. in the trial 1, the broilers were allotted in five treatments (0.92; 0.98; 1.04; 1.10 and 1.16% of lysine in conventional diets), eight replicates and ten broilers per replicate. in the trial 2, the broilers were allotted in four treatments (1.04; 1.10; 1.16 and 1.22% of lysine in diet maintaining the relationship of amino acids), eight replicates and ten broilers per replicate. in the trial 1, the digestible lysine levels influenced quadraticly the weight gain and the feed intake that increased up to 1.14 and 1.09%, respectively. although feed:gain ratio had changed by linear way, the lrp model adjusted better to the data, estimating in 1.097% the lysine level where occurred a "plateau". there was no effect of treatments on absolute weights of heart, liver and intestines, while the absolute weight of gizzard increased linearly. the absolute weight of carcass increased while the relative weights of heart and liver reduced quadraticly. in the trial 2, the treatments influenced in a crescent linear way the weight gain and the feed:gain ratio while the feed intake was not influenced. the treatments influenced linearly the absolute weight of carcass while the absolute and relative weights of the organs were not influenced. it was concluded that male broilers, in the period from 1 to 21 days of age, kept under heat stress, require at least 1.14 and 1.22% of digestible lysine in conventional diet and in diet maintaining the relationship of amino acid, respectively.
Níveis de proteína bruta em ra??es para suínos machos castrados em fase inicial de crescimento, mantidos em ambiente de baixa temperatura
Saraiva, Edilson Paes;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Ferreira, Aloízio Soares;Ferreira, Rony Antonio;Rezende, Wilkson Oliveira;Orlando, Uislei Antonio Dias;Vaz, Roberta Gomes Mar?al Vieira;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000700019
Abstract: sixty crossbred piglets, with average initial weight of 15.1 ± 0.50 kg and 56 ± 3.6 days old were used to evaluate the dietary crude protein levels, for barrows in the initial growing phase, under low temperature environment (15oc). the animals were allotted to a randomized blocks design, with five treatments, six replications and two animals per experimental unit. the treatments consisted of diets with 17.0, 18.0, 19.0, 20.0, and 21.0% crude protein (cp). the dietary crude protein levels affected daily weight gain, that increased in a quadratic way up to 19.6%. feed:gain ratio also changed in a quadratic way, increasing up to 20.0%. daily feed and digestible energy intakes were not influenced by the treatments. the best fit was obtained with the lrp discontinuous model, which estimated the crude protein level at 20%, when the data reached a plateau. the treatments influenced the protein deposition rate, that increased linearly, while the fat deposition rate did not change. it was concluded that the dietary crude protein level of 20.0%, associated to a daily intake of 10.7g total lysine, showed the best results of performance for barrows from 15 to 30 kg, under low temperature environment.
Redu??o da proteína bruta e suplementa??o de aminoácidos para suínos machos castrados dos 30 aos 60 kg mantidos em ambiente de alta temperatura
Ferreira, Rony Antonio;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Saraiva, Edilson Paes;Silva, Francisco Carlos de Oliveira;Orlando, Uislei Antonio Dias;Vaz, Roberta Gomes Mar?al Vieira;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000400010
Abstract: this experiment was carried out to evaluate the influence of the reduction of dietary cp levels and amino acid supplementation on performance of barrows maintained in a high environmental temperature. a total of sixty crossbreed (landrace x large white) piglets (average body weight = 29.8 kg) was allotted in a completely randomized experimental design with five treatments (17, 16, 15, 14 and 13% cp), six replications and two animals per experimental unit. diets and water were suplied ad libitum until the end of the experimental period, when the animals reached the average weight of 59.9 kg. the average temperature in the room was maintained at 32.2oc and the relative humidity at 74.4%, corresponding to a black globe-humidity index of 82.8. the reduction of dietary cp level affected weight gain (wg). the animals fed 14% cp diet showed significant wg reduction. feed intake (fi) also was affected by cp level, and the animals fed 14% cp diet showed smaller fi values than those fed 16 and 13% cp diets. feed:gain ratio was not affected by treatments. the animals fed the diet with 14% cp showed the smallest values of protein and fat deposition rates in the carcass. the animals fed the diet with 17% cp showed higher kidneys weights. it was concluded that dietary cp level for barrows from 30 to 60 kg body weight, maintained in a high environmental temperature, can be reduced from 17 to 13% with no effect on performance and protein deposition rate in carcass since diets are supplemented with 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.
Redu??o da proteína bruta da ra??o para suínos machos castrados dos 15 aos 30 kg mantidos em termoneutralidade
Ferreira, Rony Antonio;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Lopes, Darci Clementino;Orlando, Uislei Antonio Dias;Resende, Wilkson de Oliveira;Vaz, Roberta Gomes Mar?al Vieira;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000700013
Abstract: one experiment was conducted to evaluate the influence of reduction of the crude protein (cp) level of ration with amino acid supplementation on performance of castrated males swines maintained in a termoneutral environment (22oc). a total of sixty crossbred swines (landrace x large white), with average initial weight of 15.0 kg and 53.1 days old, was allotted to a completely randomized design with five treatments (18, 17, 16, 15 and 14% cp), six replications and two animals per experimental unit. the experimental diets were fed ad libitum until the end of the experiment, when the animals reached the average weight of 30.2 kg. the average temperature in the room was maintained in 22oc with relative humidity of 82.3%. the black globe-humidity index (bghi) was 69.6. no effect of decreasing dietary cp level on the evaluated performance parameters (feed intake, weight gain and feed:gain ratio) was observed. the deposition rates of protein and fat were not affected by the reduction of cp level and amino acid supplementation. the treatments affected the absolute and relative weight of stomach and absolute weight of intestine, and the highest weights were observed in the animals fed diet with the highest cp level. it was concluded that the dietary crude protein level can be reduced from 18 to 14% to castrated piglets from 15 to 30 kg maintained in a termoneutral environment with no effect on performance, since diets are supplemented with essential amino acids.
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 para leitoas dos 30 aos 60 kg mantidas em ambiente de alta temperatura (31oC)
Orlando Uislei Antonio Dias,Oliveira Rita Flávia Miranda de,Donzele Juarez Lopes,Lopes Darci Clementino
Revista Brasileira de Zootecnia , 2001,
Abstract: O experimento foi conduzido para avaliar níveis de proteína bruta (PB) para leitoas em crescimento, mantidas em ambiente de alta temperatura. A temperatura interna da sala foi mantida em 30,7 ± 0,61°C; a umidade relativa, em 66,4 ± 7,7%; e o índice de temperatura de globo e umidade (ITGU) foi calculado em 81,1 ± 1,36. Foram utilizadas 40 leitoas mesti as, com peso inicial médio de 29,7 ± 1,60 kg, em delineamento de blocos ao acaso com cinco tratamentos (16, 17, 18, 19 e 20% de PB), quatro repeti es e dois animais por unidade experimental. As ra es experimentais isoenergéticas (3400 kcal de ED/kg de ra o) foram formuladas para satisfazer as exigências dos animais, exceto em PB. Ra o e água foram fornecidas à vontade até o final do experimento, quando os animais atingiram peso médio de 60,0 ± 1,93 kg. Os tratamentos n o influenciaram o ganho de peso. Entretanto, a convers o alimentar melhorou de forma quadrática até o nível de 18,26%. Os consumos diários de proteína e lisina aumentaram linearmente em raz o do nível de PB da ra o, porém n o se observou efeito dos tratamentos sobre os consumos de ra o e de energia digestível diários. A taxa de deposi o diária de gordura (TDG) na carca a variou de forma quadrática, reduzindo até o nível de 19,48% de PB, enquanto a de proteína (TDP) aumentou de forma linear. Apesar dos efeitos quadrático e linear dos tratamentos sobre a TDG e a TDP, respectivamente, o modelo "Linear Response Plateau" (LRP) foi o que melhor se ajustou aos dados, estimando-se em 18,38 e 18,12% os níveis de PB, a partir dos quais a TDG e a TDP permaneceram em um plat . Leitoas em crescimento, mantidas em ambiente de alta temperatura, exigem 18,26% de PB na ra o para melhor desempenho e composi o de carca a.
Níveis de Proteína Bruta para Leitoas dos 30 aos 60 kg Mantidas em Ambiente de Conforto Térmico (21oC)
Orlando Uislei Antonio Dias,Oliveira Rita Flávia Miranda de,Donzele Juarez Lopes,Ferreira Aloízio Soares
Revista Brasileira de Zootecnia , 2001,
Abstract: O experimento foi conduzido para avaliar níveis de proteína bruta (PB) para leitoas em crescimento, mantidas em conforto térmico. A temperatura interna da sala manteve-se durante o período experimental em 21,3 ± 0,53°C, a umidade relativa em 70,5 ± 5,11% e o índice de Temperatura de Globo e Umidade (ITGU) calculado no período em 68,7 ± 0,93. Foram utilizadas 40 leitoas mesti as, com peso inicial médio de 29,4 ± 1,42 kg, em delineamento de blocos ao acaso com cinco tratamentos (16, 17, 18, 19 e 20% de PB), quatro repeti es e dois animais por unidade experimental. As ra es experimentais foram isoenergéticas, com 3400 kcal de ED/kg de ra o, e formuladas para satisfazerem às exigências dos animais, exceto em PB. A ra o e a água foram fornecidas à vontade até o final do experimento, quando os animais atingiram peso médio de 60,6 ± 1,76 kg. O nível de PB da ra o influenciou o ganho de peso diário (GPD), que aumentou, e a convers o alimentar (CA), que melhorou linearmente. Apesar do efeito linear dos níveis de PB sobre o GPD e CA, o modelo "Linear Response Plat " (LRP) foi o que melhor se ajustou aos dados, estimando em 18,78 e 19,15%, os níveis de PB a partir do qual o GPD e a CA, permaneceram em um plat . Os consumos diários de proteína e lisina aumentaram linearmente em raz o do nível de PB da ra o, porém n o se observou efeito dos tratamentos sobre os consumos de ra o e de energia digestível diários. Concluiu-se que leitoas em crescimento, mantidas em ambiente de conforto térmico, exigem 19,15% de PB na ra o, correspondendo a um consumo de 343 e 19,08 g/dia de proteína e lisina total, respectivamente.
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