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Search Results: 1 - 10 of 10380 matches for " Charles;Donzele "
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Lisina digestível para suínos machos n?o castrados de alto potencial genético em fase de crescimento
Kiefer, Charles;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010000700023
Abstract: this study was conducted to determine the digestible lysine requirement for non castrated pigs of high genetic potential in growth phase. it was used 320 not castrated and 80 castrated males, with initial weight of 27.75±1.61kg, distributed in a randomized block design consisting of five treatments (0.90, 1.00, 1.10 and 1.20% digestible lysine for not castrated and 1.10% digestible lysine for castrated males), eight replicates with ten animals each. the increase of lysine concentration in the diet increased linearly (p<0.05) the final weight, daily lysine intake, daily weight gain and lysine intake per kilogram of weight gain and reduced feed conversion of not castrated males. the treatments did not affected (p>0.05) daily feed intake of not castrated males. castrated males had higher (p<0.05) daily feed intake and lower (p<0.05) feed conversion compared to not castrated fed diets containing 1.00, 1.10 and 1.20% lysine. castrated males had higher daily lysine intake (p<0.05) than not castrated fed diets containing 0.90, 1.00 and 1.10% lysine. castrated pigs had lower (p<0.05) daily gain and final weight in relation to non castrated consuming a diet containing 1.20% lysine. castrated males had higher (p<0.05) lysine intake per kilogram of weight gain compared with not castrated. it is recommended a minimum of 1.20% lysine in the diet of not castrated male pigs with high genetic potential in growth phase.
Planos nutricionais de lisina digestível para suínos machos imunocastrados em crescimento e termina??o
Kiefer, Charles;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000900016
Abstract: this study was conducted to evaluate nutritional plans of digestible lysine for boars 67 to 165 days of age, immunocastrated at their 107 and 135 days. two hundred and forty animals, with initial body weight of 27.73 ± 1.57 kg, were sorted in a randomized block design with four nutritional plans of digestible lysine for immunocastrated pigs (0.9-0.8-0.7; 1.0-0.9-0.8; 1.1-1.0-0.9 and 1.2-1.1-1.0%, respectively from 67 to 107 days, from 108 to 135 days and 136 to 165 days) with four replications and a control plan for barrows (1.1-1.0-0.9% of digestible lysine) with eight replications and ten animals each. the nutritional plan with the sequence containing 1.1-1.0-0.9% digestible lysine improved feed conversion, reduced backfat thickness and increased the amount of lean meat of pigs carcass when compared to other nutritional plans. the other performance and carcass variables were not affected by nutritional plans. nutritional plans with the sequence 1.1-1.0-0.9% of digestible lysine for periods of 67 to 107 days, 108 to 135 days and 136 to 165 days, respectively, meet the nutritional needs of immunocastrade boars 107 to 135 days old.
Nutritional plans for boars
Kiefer, Charles;Donzele, Juarez Lopes;Oliveira, Rita Flavia Miranda de;Suguisawa, Liliane;Suguisawa, Jorge Murilo;Marques, Ana Carolina Wider;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000600019
Abstract: the objective of the present study was to evaluate nutritional plans for boars. four hundred animals of 67 to 135 days of age and initial weight of 27.75±1.61 kg were distributed in a randomized block design with seven nutritional plans for boars (9.0-8.0; 9.0-9.0; 10.0-9.0; 10.0-10.0; 11.0-10.0; 11.0-11.0 and 12.0-11.0 g/kg of digestible lysine from 67 to 107 days and from 108 to 135 days, respectively) with four repetitions and a control plan for barrows (11.0-10.0 g/kg of digestible lysine) with eight repetitions and ten animals each. uncastrated male swine presented better feed conversion; however they showed a lower marbling degree in relation to barrows, regardless of the nutritional plan. the nutritional plan that corresponds to the sequence of 11.0-10.0 g/kg of digestible lysine from the 67 to the 107 days and from the 108 to the 135 days, respectively, meets the nutritional needs of boars.
Exigência de metionina mais cistina digestíveis para suínos machos castrados mantidos em ambiente de alta temperatura dos 30 aos 60 kg
Kiefer, Charles;Ferreira, Aloízio Soares;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Brustolini, Paulo César;Silva, Francisco Carlos de Oliveira;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000100014
Abstract: fifty barrows (30.10 ± 0.48 kg to 60.08 ± 0.49 kg live weight were assigned to a completely randomized blocks design, with five digestible methionine plus cystine levels (0.448, 0.490, 0.531, 0.573, and 0.615%), five replicates and two animals per experimental unit, to evaluate the requirement of digestible methionine plus cystine the digestible methionine and cystine levels of the diet influenced the average daily gain that increased in a linear way. however, the linear response plateau model was what best adjusted the data that stabilized in a plateau starting from the level of 0.527% of digestible methionine plus cystine. the feed:gain ratio decreased in a quadratic way with the treatments, until the estimated level of 0.551%. it was not observed the effect of the treatments on the feed intake. the digestible methionine plus cystine intake increased linearly with the increase digestible methionine plus cystine levels in the diet. effect of the treatments was verified on the protein deposition that increased quadraticaly until the level of 0.551%, while no effect was observed on fat deposition. it was concluded that digestible methionine plus cystine requirements for barrows maintained in high environmental temperature from 30 until the 60 kg are 0.527 and 0.551% of diet, correspondent to digestible methionine plus cystine:digestible lysine ratio of 63.5 and 66%, respectively, to highest weight gain and better feed:gain ratio and highest protein deposition in the carcass.
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%.
Níveis de treonina digestível em dietas para fêmeas suínas de alto potencial genético em lacta??o sob condi??es de alta temperatura ambiente
Kiefer, Charles;Ferreira, Aloízio Soares;Oliveira, Rita Flávia Miranda de;Donzele, Juarez Lopes;Carrijo, Alfredo Sampaio;Silva, Francisco Carlos de Oliveira;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000600015
Abstract: fifty and two lactating sows were allotted to a randomized complete blocks experimental design with four digestible threonine levels (0.64; 0.67; 0.70 and 0.73%) and 13 replications, and each experimental unit was consisted by a female. the temperature inside in the room was of 29.7 ± 2.5°c. there was no effect of digestible threonine levels in the diet on the weight of the sows at weaning. the total and percentage sow weight losses linearly reduced with the increase of digestible threonine level in the diet during the lactation period. digestible threonine level in the diets influenced fat thickness (ft) at weaning, and affected the total and percentage variation of ft. the compositions of fat and corporal protein at weaning were not influenced by digestible threonine levels in the diet. a linear reduction for total and percentage of corporal fat mobilizations was observed as digestible threonine levels increased in the diet. the mobilization of corporal protein, milk production and the interval weaning time-estrus were not influenced by digestible threonine levels in the diet. digestible threonine leveld in the diet had no effect on intake of diet, of lysine and of digestible energy. however, a linear increase was observed for the intake of digestible threonine as the levels of it increased in the diet. digestible threonine levels in the diet had not influenced the energy efficiency of the females, the performance of the piglets and the litters. high-producing lactating sows under high temperature environmental conditions require 0.73% of digestible threonine, corresponding to a daily intake of 32.5g and the digestible threonine:digestible lysine ratio of 73%.
Níveis de proteína bruta na ra??o para porcas pluríparas em gesta??o
Ferreira, Aloízio Soares;Lopes, Thais Helena Cunha e;Donzele, Juarez Lopes;Costa, Eduardo Paulino da;Kiefer, Charles;Lima, Kedson Raul de Souza;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000300018
Abstract: forty crossbreed sows (1/2landrace, 1/4large white, 1/4pietran) with average weight of 188,2 ± 18,81 kg at fourth and/or fifth reproductive cycles, in a total of 75 childbirths, were used to evaluate different crude protein (cp) levels in the gestation diet. it was used a completely randomized design, with five treatments (rations with 10,0; 11,5; 13,0; 14,5 e 16,0% of cp), fifteen replicates and being each childbirth an experimental unit. sow gain was not affected by the cp levels in gestation diet. the pig weight and number of pigs born alive, the litter born weight and mortality were not affected by the treatments. the levels of cp in gestation diet did not influence the weight gain of the sow at lactation. the number of weaned pigs, pig average weight at weaning and pig weight gain were not affected by the cp levels in the gestation diet. it is concluded, based in the energy efficiency, that the requirement of cp for pluriparous sows, at fourth and fifth reproductive cycles, in the gestation phase is 11.5%, corresponds to a daily consumption of 207 g of protein and 10.5 g of lysine.
Níveis de treonina digestível em dietas para fêmeas suínas lactantes de médio potencial genético
Kiefer, Charles;Ferreira, Aloizio Soares;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Silva, Francisco Carlos de Oliveira;Carrijo, Alfredo Sampaio;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800010
Abstract: seventy and six lactating crossbred sows of medium genetic potential with initial weight of 207.0 ± 32.0 kg and reproductive cycles order of 3.53 ± 2.11 were used to evaluate digestible threonine levels in the lactation phase. the animals were allotted to a randomized blocks experimental design with four treatments (0.589, 0.627, 0.665, and 0.703% of digestible threonine) and nineteen replications, in which each experimental unit was onsisted by a female. there was no effect of digestible threonine levels on the weight of sows at weaning time, fat thickness (ft) and corporal protein composition at weaning time. the loss of weight of the sows during the lactation reduced in a linear form with the increase of the digestible threonine level. there was no effect of digestible threonine levels on ft variation during the lactation, however affected the corporal protein mobilization that linearly reduced with the increase of the digestible threonine level. there was no effect of digestible threonine levels on feed intake, lysine and digestible energy, however, was observed linear increase of the intake of digestible threonine with its increase level in the diet. the digestible threonine levels did not influence the energy efficiency of the sows; weaning - estrus interval and the performance of the pigs and litters. lactating sows of medium genetic potential require 0.589% of digestible threonine, corresponding to daily consumption of 28.5 g and a digestible threonine: digestible lysine ratio of 62%.
Avalia??o dos níveis de zeólita em dietas para suínos em fase de crescimento e termina??o
Rocha, Gabriel Cipriano;Donzele, Juarez Lopes;Oliveira, Rita Flávia Miranda de;Silva, Francisco Carlos de Oliveira;Kiefer, Charles;Brustolini, Paulo César;Pereira, Cinthia Maria Carlos;Alebrante, Leandro;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000100017
Abstract: this study was conducted to evaluate levels of inclusion of zeolite in diets for pigs on performance, carcass characteristics, blood and liver histopathological parameters of these animals in their growing-finishing phases. eighty-four barrows from commercial hybrids of high genetic potential for meat deposition, with initial weight of 30.34±1.14 kg were distributed in randomized blocks design, with seven levels of adsorbent (0.0-0.0; 1.0-0.5; 1.0-1.0; 2.0-1.0; 2.0-2.0; 3.0-1.5; 3.0-3.0, respectively, on growing and finishing phases), six replicates with two animals per pen, which was considered the experimental unit. sorghum was used as naturally contaminated source of mycotoxins. the different levels of adsorbent in the diets were obtained by the supplementation of zeolite in the basal diet. the inclusion of zeolite in the diet did not affect the daily feed intake, daily weight gain, feed conversion or the carcass characteristics of the pigs. in the same way blood parameters, liver histopathological examination and the bone concentration neither calcium nor phosphorus were affected by the different levels of zeolita. due to the good performance and carcass characteristics, as well as the normality of the other parameters of the animals fed diets without adsorbents analyzed, it can be inferred that the diets had low levels of mycotoxin contamination. the levels of zeolite do not affect the performance, carcass characteristics, blood parameters or liver histopathological examination in growing-finishing pigs fed diets with low level of contamination by mycotoxin.
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.
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