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Redu o da proteína bruta da ra o para suínos machos castrados dos 15 aos 30 kg mantidos em termoneutralidade  [cached]
Ferreira Rony Antonio,Oliveira Rita Flávia Miranda de,Donzele Juarez Lopes,Lopes Darci Clementino
Revista Brasileira de Zootecnia , 2003,
Abstract: Um experimento foi conduzido para avaliar a influência da redu o da proteína bruta (PB) e suplementa o de aminoácidos sintéticos sobre o desempenho de suínos machos castrados mantidos em ambiente termoneutro (22masculineC). Foram utilizados 60 leit es mesti os (Landrace x Large White) com peso médio inicial de 15,0 kg e idade média de 53,1 dias, em delineamento inteiramente ao acaso, com cinco tratamentos (18, 17, 16, 15 e 14% PB), seis repeti es e dois animais por unidade experimental. As ra es experimentais foram fornecidas à vontade até o final do experimento, quando os animais atingiram o peso médio de 30,2 kg. A temperatura média no interior da sala foi mantida em 22masculineC, com umidade relativa de 82,3%. O índice de Temperatura de Globo e Umidade calculado no período foi de 69,6. N o se observou efeito da redu o do nível de proteína bruta da ra o sobre as variáveis de desempenho (consumo de ra o, ganho de peso e convers o alimentar). As taxas de deposi o de proteína e gordura também n o foram influenciadas pela redu o da PB na ra o. Os tratamentos influenciaram os pesos absoluto e relativo do est mago e o peso absoluto do intestino, sendo os maiores valores observados em animais que receberam a ra o com maior nível de proteína bruta. Concluiu-se que o nível de PB da ra o pode ser reduzido de 18 para 14%, sem prejudicar o desempenho de suínos machos dos 15 aos 30 kg mantidos em ambiente termoneutro, desde que devidamente suplementadas com aminoácidos essenciais limitantes.
Proteína bruta para suínos machos castrados mantidos em ambiente de conforto térmico dos 15 aos 30 kg
Hannas Melissa Izabel,Oliveira Rita Flávia Miranda de,Donzele Juarez Lopes,Ferreira Aloízio Soares
Revista Brasileira de Zootecnia , 2000,
Abstract: RESUMO - Este experimento foi realizado para determinar a exigência de proteína bruta para suínos mesti os (Landrace x Large White), machos, castrados dos 15 aos 30 kg, mantidos em ambiente de conforto térmico. Durante o período experimental, a temperatura da sala manteve-se em 23,1±1,19°C, com umidade relativa de 80,6±4,59% e índice de temperatura do globo e umidade de 69,85±1,38. Foi usado um total de 60 leit es mesti os, machos castrados, com peso médio inicial de 14,8±0,85kg e final de 29,3±2,42 kg. Foi usado delineamento de blocos ao acaso, com cinco tratamentos (17,0; 18,0; 19,0; 20,0; e 21,0% de proteína bruta), seis repeti es e dois animais por unidade experimental. O nível de proteína bruta na ra o influenciou o ganho de peso diário e os consumos de proteína e lisina diários, que aumentaram linearmente. Entretanto, a convers o alimentar diminuiu linearmente. N o houve efeito do nível de proteína sobre os consumos de ra o e energia diários. A taxa de deposi o de gordura n o foi influenciada, enquanto a taxa de deposi o de proteína aumentou quadraticamente até o nível de 20,0% de proteína bruta. Os pesos absolutos do fígado e do intestino e o peso relativo do fígado aumentaram linearmente com o crescente nível de proteína bruta da ra o. A concentra o de uréia plasmática n o foi influenciada pelos níveis de proteína bruta da ra o. Suínos mesti os, machos, castrados de 15 a 30 kg, mantidos em ambiente de conforto térmico exigem 20,0% de proteína bruta na ra o, correspondente a 0,90% de lisina total ou 57 g de proteína/Mcal ED. O nível de uréia no plasma sangüíneo n o foi um parametro adequado para estimar a exigência de proteína bruta.
Proteína bruta para suínos machos castrados mantidos em ambiente de conforto térmico dos 15 aos 30 kg
Hannas, Melissa Izabel;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Ferreira, Aloízio Soares;Lopes, Darci Clementino;Soares, José Luiz;Moretti, Andréa Monica;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000200022
Abstract: abstract - this experiment was carried out to evaluate the requirement of crude protein for initial growing crossbred barrows (landrace x large white), from 15 to 30 kg, maintained in thermal comfort. during the experimental period, the room temperature was maintained at 23.1±1.19°c, with relative humidity at 80.6±4.59% and black globe index humidity at 69.8±1.38. sixty crossbred barrows with initial average weight of 14.8±0.85 kg and final weight of 29.3±2.4 2kg, were used. a completely randomized blocks design, with five treatments (17.0, 18.0, 19.0, 20.0 and 21.0% of crude protein), six replicates and two animal per experimental unit was used. the dietary crude protein level influenced the daily weight gain and protein and lysine daily intakes that linearly increased. however, the feed:gain ratio linearly decreased. there was no effect of crude protein level on diet and digestible energy daily intakes. the fat deposition rate was not affected, while the protein deposition rate in a quadratic way increased up to the crude protein level of 20.0%. the absolute and relative weight of liver linearly increased as dietary crude protein level increased. the urea plasma concentration was not affected by the dietary crude protein level. crossbred barrows pigs, from 15 to 30 kg, maintained under thermal comfort, require 20.0% of dietary crude protein, corresponding to 0.901% of total lysine or 57 g of protein/mcal de. the plasma urea concentration did not constitute to be an adequate parameter to estimate the crude protein requirement.
Exigência de aminoácidos sulfurados digestíveis para suínos machos castrados mantidos em ambiente termoneutro dos 15 aos 30kg
Vaz, R.G.M.V.;Oliveira, R.F.M.;Donzele, J.L.;Ferreira, A.S.;Brustolini, P.C.;Kiefer, C.;Orlando, U.A.D.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2005, DOI: 10.1590/S0102-09352005000300012
Abstract: the requirements of digestible sulphurous aminoacids for swine barrows maintained in a thermoneutral environment from 15 to 30kg were estimated. seventy crossbred barrows were allotted to a completely randomized block design with five treatments (0.465; 0.511; 0.558; 0.605; 0.652% of digestible methionine+cystine), seven replicates and two animals by replicate. the experimental diets and the water were supplied ad libitum. the inside room temperature was maintained in 21.8±0.4oc and the relative humidity in 73.8±4.9%. the digestible methionine and cystine levels of the diet had a quadratic effect on average daily gain that increased until the level of 0.596% and the feed:gain ratio that reduced quadraticaly until the level of 0.627%. no effect of digestible aminoacid on feed intake was observed. the treatments affected protein deposition in the carcass that increased quadraticaly until the level of 0.630%, but had no effect on fat deposition. the digestible sulphurous aminoacids requirement for barrows maintained in a thermoneutral environment from 15 to 30kg was 0.63%, which corresponds to digestible methionine and cystine:digestible lysine ratio of 67%, respectively, for highest performance and gain composition.
Exigência de metionina + cistina digestíveis para suínos machos castrados mantidos em ambiente termoneutro dos 30 aos 60 kg
Kiefer, Charles;Ferreira, Aloízio Soares;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Silva, Francisco Carlos de Oliveira;Brustolini, Paulo César;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000300016
Abstract: fifty barrows from 29.97 ± 0.36 kg to 60.38 ± 0.49 kg were used to evaluate the requirement of digestible methionine + cystine. a completely randomized blocks design, with five digestible methionine + cystine levels (0.448; 0.490; 0.531; 0.573 and 0.614%), with five replicates and two animals per experimental unity, was used. the digestible methionine + cystine levels of the diet influenced in a quadratic way the average daily gain and the feed:gain being the level of digestible methionine + cystine estimated in 0.549% for the maximum weight gain and better feed:gain. no effect of the treatments on the feed intake was observed. the digestible methionine + cystine intake increased linearly as the digestible methionine + cystine levels in the diet increased. quadratic effect of the treatments was verified on the fat and protein depositions in the carcass that increased until the levels of digestible methionine + cystine estimated in 0.548 and 0.547%, respectively. it was concluded that digestible methionine + cystine requirements for barrows maintained in thermoneutral environment from 30 to 60 kg is 0.549%, correspondent to digestible methionine + cystine:digestible lysine ratio of 66%.
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.
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.
Influência da temperatura ambiente sobre o desempenho e os parametros fisiológicos de suínos machos castrados dos 30 aos 60 kg
Tavares Sandra Lúcia da Silva,Donzele Juarez Lopes,Oliveira Rita Flávia Miranda de,Ferreira Aloízio Soares
Revista Brasileira de Zootecnia , 2000,
Abstract: RESUMO - O presente trabalho foi realizado para avaliar a influência de ambientes térmicos constantes (termoneutro e calor) sobre o desempenho e as variáveis fisiológicas de suínos machos castrados dos 30 aos 60 kg PV. Cem animais foram distribuídos em delineamento em blocos ao acaso, com cinco tratamentos (3100, 3250, 3400, 3550 e 3700 kcal de ED/kg de ra o), cinco repeti es e dois animais por unidade experimental. Ganho de peso, consumo de ra o, proteína e energia, convers o alimentar e eficiência de utiliza o da proteína e da energia foram reduzidos no ambiente de calor. A rela o peso jejum/peso vivo foi maior no ambiente de calor e a rela o peso carca a/peso jejum n o foi influenciada pela temperatura ambiente. A taxa de deposi o de proteína elevou e a de gordura decresceu com o aumento da temperatura no ambiente. A temperatura ambiente reduziu o peso dos órg os internos e aumentou a freqüência respiratória, nos animais mantidos no ambiente de calor. Embora a convers o alimentar tenha piorado no ambiente de calor, os animais mantidos neste ambiente apresentaram maior taxa de deposi o de proteína na carca a.
Redu??o da proteína bruta da ra??o e suplementa??o de aminoácidos para suínos machos castrados dos 15 aos 30 kg mantidos em ambiente de alta temperatura
Ferreira, Rony Antonio;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Araújo, Cláudio Vieira de;Silva, Francisco Carlos de Oliveira;Vaz, Roberta Gomes Mar?al Vieira;Rezende, Wilkson Oliveira;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000400016
Abstract: a trial was conducted to evaluate the effect of reduced cp, amino acid-supplemented diets on performance of castrated males swines on high environmental temperature (32oc). a total of sixty crossbred piglets (landrace x large white) averaging initial weight of 15.2 kg was allotted to completely randomized experimental design with five treatments (18, 17, 16, 15, and 14% of cp), six replications and two animals per experimental unit. the experimental diets were fed to swine ad libitum until the end of the experiment, when the animals averaged 29.9 kg. the average temperature in the room was maintained in 32.3oc, with relative humidity of 75.9%, corresponding a black globe-humidity index (bghi) of 82.6. the reduced cp level, amino acid-supplemented-based diets did not affect the evaluated parameters (feed intake, weight gain and feed:gain ratio). no treatment effect on digestible lysine and energy intakes was observed. gradual reduction on daily nitrogen intake was observed. decreasing dietary cp levels affected only fat deposition rate. the highest values of relative and absolute weights of liver and stomach and the relative weight of kidneys were observed in the animals fed diets with the highest dietary cp level. it was concluded that the dietary cp level can be reduced from 18 to 14% for castrated piglets from 15 to 30 kg on high environmental temperature, with no effect on performance, since diets are supplemented with the essential amino acids.
Desempenho e características de carca a de bovinos de corte inteiros ou castrados e suplementados ou n o durante o inverno = Performance and carcass characteristics of bulls or steers supplemented or not supplemented during the winter
Saulo Malaguido Climaco,Edson Luis de Azambuja Ribeiro,Ivone Yurika Mizubuti,Marco Ant?nio da Rocha
Acta Scientiarum : Animal Sciences , 2006,
Abstract: Foram utilizados 40 bovinos nelores, divididos em dois grupos: SUP - os animais foram mantidos a pasto e receberam 0,5% do peso vivo em suplemento no período da seca; NSU - animais mantidos a pasto, sem suplemento. Metade dos animais de cada tratamento eram castrados e a outra metade eram inteiros. Observou-se melhor ganho médio diáriodurante o período do inverno para os animais suplementados (SUP = 0,339; NSU = 0,193 kg) e os animais pertencentes ao grupo controle (NSU) apresentaram ganho compensatório no período do ver o. Os animais inteiros obtiveram ganhos médios diários superiores aoscastrados durante todo o período (0,506 x 0,412 kg) e atingiram o peso de abate (480 kg) a uma idade mais jovem (330 x 409 dias até o abate). Verificou-se melhor rendimento de carca a fria para os animais castrados. A suplementa o n o promoveu melhorescaracterísticas de carca a aos animais testados. Forty Nellore bovines were used. Animals were divided in two groups: 1) SUP – Animals on pasture and supplemented (0.5% of live bodyweight) with a concentrated during the winter (dry season), and 2) NSU – Animals on pasture, without supplementation. Half of the animals of each treatment was steers and the other half was bulls. Best average daily gain (ADG) during the period of the winter was observed in the supplemented animals (SUP = 0.339; NSU = 0.193 kg), and the animals belonging to the control group (NSU) presented compensatory weight gain in the period of the summer. Bulls had greater ADG during the whole period than steers (0.506 vs. 0.412 kg), and they reached the slaughter weight (480 kg) at a younger age (330 vs. 409 days up to slanghter). Best cold carcass dressing percentage was verified for steers and the supplementation did not promotebetter carcass characteristics in the tested animals.
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