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Search Results: 1 - 10 of 6025 matches for " Rostagno Horacio Santiago "
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Níveis de fósforo digestível para suínos em fase de crescimento
Bünzen, Silvano;Rostagno, Horacio Santiago;Kiefer, Charles;Teixeira, Alexandre de Oliveira;Ribeiro Junior, Valdir;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000200013
Abstract: this study was carried out to determine the digestible phosphorus requirement for growing swine. seventy crossbred swine (35 castrated males and 35 females), with initial weight of 29.72±1.52 kg were distributed in a completely randomized design with five treatments, seven replicates and two animals (one male and one female) per experimental unit. the experiment lasted 21 days. the treatments were composed of diets formulated with corn and soybean meal, supplemented with dicalcium phosphate, corresponding to five levels of digestible phosphorus (0.19; 0.25; 0.30; 0.35 and 0.40%). for each phosphorus level, limestone was added to maintain the calcium:phosphorus ratio constant. the increase in digestible phosphorus influenced feed intake and weigh gain quadratically, and the maximum values for those parameters were obtained with the levels of 0.32 and 0.31% digestible phosphorus, respectively. there was no effect of digestible phosphorus levels on the feed:gain ratio. the ashes and calcium contents analyzed in the metatarsi were not influenced by digestible phosphorus levels, while the phosphorus content in bone showed linear response. the requirement of digestible phosphorus for pigs fed diets based on corn and soybean meal is 0.31%, corresponding to a daily intake of 5.87 g digestible phosphorus.
Determina??o dos valores energéticos de alguns óleos e gorduras para pintos de corte machos e fêmeas aos 21 dias de idade
Nascif, Carla Cristina Cardoso;Gomes, Paulo Cezar;Albino, Luiz Fernando Teixeira;Rostagno, Horacio Santiago;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000200014
Abstract: one bioassay was carried out using 21-to32-day old broilers chicks to determine the values of apparent metabolizable energy (ame) and nitrogen-corrected apparent metabolizable energy (amen) of crude soybean oil, corn oil, canola oil, avian fat, coconut fat, swine lard, beef tallow, crude soybean oil + coconut fat and crude soybean oil + beef tallow, both latter in 1:1 proportion. the method of total excreta collection was used for the trials, which lasted 10 days each: the first five days for adaptation and the five remaining days for excreta collection. in the assay, difference was observed among the treatments and between the sexes, with the amen values obtained for the females accounting for 98% of the amen values obtained for the males, on average. the interaction feed x sex showed no difference. the mean values of amen observed for broilers chicks for crude soybean oil, corn oil, canola oil, avian fat, coconut fat, swine lard, beef tallow, crude soybean oil + coconut fat and crude soybean oil + beef tallow, 1:1, were, respectively: 8,273, 8,582, 8,681, 8,511, 7,487, 7,536, 7,227, 8,029 and 8,171 kcal/kg as fed.
Valores de composi??o química e energética de alguns alimentos para aves
D'Agostini, Priscila;Gomes, Paulo Cezar;Albino, Luiz Fernando Teixeira;Rostagno, Horacio Santiago;Sá, Luciano Moraes;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000100017
Abstract: the experiment was carried out to determine the chemical and the energetic values of eight feedstuffs (corn grain, corn pre-cooked i and ii, canola meal, spray-dried plasma, poultry by-product meal, glucose and corn starch) for birds. to determine the apparent metabolizable energy (ame) and nitrogen corrected apparent (amen) values, the traditional method of total excreta collection was used, with 400 broiler chicks, male and female, 21 days old. a completely randomized design, with ten treatments (eight feedstuffs and two reference diets), and five replications of eight birds per experimental unit, was used. the corn grain and pre-cooked i and ii replaced 40%, and the starch and glucose 20% of the reference diet containing 26% crude protein (cp); the canola meal replaced 40%, and spray-dried plasma and poultry by-products meal 20% of the reference diet containing 18% cp. dry matter - dm (%), cp (%), ame (kcal/kg) e amen (kcal/kg) values were, respectively, for corn grain: 87.72, 7.33, 3,246, and 3,235; for pre-cooked i: 87.75, 7.14, 3,385, and 3,379; for pre-cooked ii: 87.88, 7,34, 3.187 and 3.179; for canola meal: 87,53, 37,89, 1,793 and 1,778; for spray-dried plasma: 90,67, 74,24, 3.503 and 3.474; and for poultry by-product meal: 90.35, 64.98, 4,293 and 4,268. for the glucose and corn starch, only the values of dm (%), ame (kcal/kg) and amen (kcal/kg) were determined, and for the glucose the values were 99.12, 3,170, and 3,168 and for corn starch, 85.52, 3,203, and 3201, respectively.
Valores energéticos e aminoácidos digestíveis da semente do capim-arroz (Echinochloa spp) para aves
Rodrigues, Paulo Borges;Dutra Júnior, Wilson Moreira;Rostagno, Horacio Santiago;Rodrigues, Kênia Ferreira;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000500011
Abstract: three assays were carried out to evaluate the nutritive value of the barnyardgrass seeds (echnochloa spp.) for poultry. in the first assay, twelve adult cockerels were used to determine the true metabolizable energy value corrected by nitrogen retained (tmen), using the forced fed method. in this assay six cockerels were forced fed 30 g of the feed and six cockerels were fastened to determinate metabolic and endogenous losses. in the second assay, twelve cecectomized cockerels were used to determine the true digestibility coefficients of the amino acids in the tested feed, using the same metodology. to determinate the apparent metabolizable energy corrected by nitrogen retained (amen) in the thirth assay, the total excreta collection method was used, with 80 growing chicks of commercial strain. the barnyardgrass seed was included in the proportion of 25 percent of the reference diet, which contained 20% cp and 3000 kcal of the me/kg. the reference and test diets were fed to four replicates of ten birds each. the energy values determined were 1813 kcal amen and 1976 kcal of the tmen/kg as fed. the true digestibility coefficients of the essential and non essential amino acids were, in average, 78.2 % and 78.3 %, respectively. the threonine and the lysine shown lower digestibility (65.8 and 67.2%, respectively) and the phenilalanine (86.4%) follow by the methionine (86.0%) presented higher values among essential amino acids. the tyrosine (90.5%) and cystine (56.3%) presented higher and lower digestibility coefficients, respectively, among the non essential amino acids.
Exigências de metionina + cistina para frangos de corte machos em diferentes fases de cria??o
Atencio, Anel;Albino, Luiz Fernando Teixeira;Rostagno, Horacio Santiago;Vieites, Flávio Medeiros;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000500007
Abstract: three assays were carried out to determine methionine + cystine requirement and the digestible methionine + cystine: digestible lysine ratio of males broilers, avian farms, from 1 to 20, 24 to 38 and 44 to 56 days of age. each experiment was a completely randomized design with five levels of methionine + cystine, six replications and 20 birds per pen from 1 to 20 and 24 to 38 and 16 birds per pen from 44 to 56 day of age, respectively. the digestible methionine + cystine levels were 0.731-0.916% (in increments of 0.046); 0.712-0.881% (in increments of 0.042) and 0.631-0.781% (in increments of 0.037) for 1 to 20, 24 to 38 and 44 to 56 days of age, respectively. feed intake, weight gain, feed conversion and carcass quality were evaluated. there were linear positive and quadratic effects of the methionine + cystine levels on body weight gain and feed conversion, respectively, in the 1 to 20 days phase. using the broken line model, the requirement of digestible methionine + cystine (total) and the ratio of digestible methionine + cystine:digestible lysine for the 1 to 20 days phase was 0.808 (0.907% total) and 70%, respectively, according to the results of feed conversion. for the phase 24 to 38 days, weight gain, feed conversion and absolute leg quarter weight responded quadratically to increasing levels of digestible methionine + cystine. using the broken line model, the requirement of digestible methionine + cystine (total) and the ratio of digestible methionine + cystine:digestible lysine for the 24-38 days phase were 0.767 (0.844% total) and 72%, respectively, according to the results of body weight gain. the absence of a significant response for body weight gain and feed conversion in the third phase (44-56 days) demonstrates that the lowest level of methionine + cystine met the birds requirement. nevertheless, according to the best biological response the digestible (total) methionine + cystine were 0.668% (0.738% total) and 71%, respectively. methionine + cystin
Exigência nutricional de treonina digestível para galinhas poedeiras no período de 34 a 50 semanas de idade
, Luciano Moraes;Gomes, Paulo Cezar;Cecon, Paulo Roberto;Rostagno, Horacio Santiago;D'Agostini, Priscila;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800018
Abstract: with the objective to establish the nutritional requirement of threonine for light and semi-heavy laying hens in the period from 34 to 50 weeks old, 580 laying hens (half lohmann and half lohmann brown) submitted to a basal ration containing 2.850 kcal me/kg, 14.0% cp, supplemented of five levels (0.00, 0.035, 0.07, 0.105, and 0.140%) of l-threonine, in order to provide 0.410, 0.445, 0.480, 0.515, and 0.550% of digestible threonine in the rations. a 5 x 2 (threonine level and laying hen strain) factorial arrangement, with six replications per treatment and six hens per experimental unit in a completely randomized design was used. egg production (%), egg mass and average egg weight (g), feed intake (g/hen.day), feed conversion (kg feed/egg dozen), body weight change (g) and internal egg quality (haugh units, albumen and yolk index) were evaluated. the threonine levels did not affect the body weight change, feed intake, egg weight and internal egg quality in both laying hen strains. feed conversion, egg production, egg mass and haugh units were positive influenced by the threonine level. the digestible threonine requirement, estimated by the quadratic model, for the light and the semi-heavy laying hens, was 0.510 and 0.517% in the diet, corresponding to the daily intake per hen of 583 and 575 mg lysine/day, respectively.
Digestibilidade verdadeira da lisina HCl e da lisina Sulfato determinada com galos cecectomizados
Neme, Rafael;Albino, Luiz Fernando Teixeira;Rostagno, Horacio Santiago;Rodrigueiro, Ramalho José Barbosa;Nunes, Ricardo Vianna;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000600021
Abstract: the objective of this experiment was to determine the true digestibility of lysine hcl and lysine sulfate, with cecectomized adult roosters. eighteen roosters, 2.854 kg live weight, were cecectomized and kept in cages for a period of 10 days. after two days of adaptation to the cages the animals were fed twice a day during one hour (8:00 a.m. to 9:00 am and 4:00 p.m. to 5:00 pm), for crop dilation to avoid regurgitation of the feed. the forced fed method was utilized, with 12 roosters placed in individual cages equipped with excreta collection pans. the experiment design was complete randomized, with two treatments (two lysine sources) each one with six replicates. also six birds were fasted to determine the endogenous/metabolic loses. diets and excreta were analyzed to determine amino acid contents and the true lysine digestibility coefficients calculatted. the true digestibility coefficients, in percentage, were 97.59% for lysine hcl and 98.34% for lysine sulfate, they were not statistically different.
Níveis nutricionais de cobre para frangos de corte machos e fêmeas na fase inicial
Schmidt, Marlene;Gomes, Paulo Cezar;Rostagno, Horacio Santiago;Albino, Luiz Fernando Teixeira;Cupertino, Edwiney Sebasti?o;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000500021
Abstract: three hundred and eighty-four birds, half males and half females, were used to determine the copper (cu) requirement for broilers in the initial phase (from 8 to 21 days). a basal diet was formulated to meet the bird nutritional requirements, except for cu, that was deficient at 1.47 ppm level. the treatments consisted of cu supplementation levels, from cu sulfate, in a total of 1.47, 4.97, 8.47, 11.97, 15.47 and 18.97 ppm cu in the diet. weight gain, feed intake, feed:gain ratio and cu concentration in the bone, liver and serum were evaluated. the studied cu levels affected feed intake, but did not alter weight gain and feed:gain ratio. no effects of cu levels on cu concentration in the bone were detected. effects of increasing dietary cu levels on cu concentration in the liver and serum were observed. however, the most adequate value of cu requirement was estimated in the serum, because it better represents the cu nutricional status in the animal organism. it was concluded that cu requirements for broilers, males and females, from 8 to 21 days old is of 9.48 ppm, considering that corn and soybean meal-based diets, for broilers, contain from 8.5 to 11 ppm cu and that cu bioavailability in the soybean meal of 38%.
Exigência nutricional de cálcio e sua biodisponibilidade em alguns alimentos para frangos de corte, no período de 1 a 21 dias de idade
, Luciano Moraes;Gomes, Paulo Cezar;Albino, Luiz Fernando Teixeira;Rostagno, Horacio Santiago;D'Agostini, Priscila;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000100020
Abstract: one experiment was carried to determine the nutritional requirement of calcium for broilers in the starting phase (1 to 21 days) and to evaluate the availability of this mineral in dicalcium phosphate, calcitic limestone and dolomitic limestone. seven hundred and twenty 1-day old avian farm broiler chicks (360 from each sex) were used. the experiment lasted 21 days. a completely randomized design, with 12 treatments, six replications and 10 birds per experimental box (five males and five females) was used. a basal diet was formulated to meet the birds nutritional requirements, except for the calcium, that remained deficient at the level of 0.161%. the basal diets were supplemented with 0.01, 0.25, 0.50, 0.75, 1.00 and 1.25% calcium levels from calcium carbonate and two levels of calcium (0.50 and 0.75%) from each source in test: dicalcium phosphate, calcitic limestone and dolomitic limestone. the first six treatments were used to estimate the calcium requirements of broilers. to determine the calcium availability in the studied sources, the treatments with 0.25, 1.00 and 1.25% of calcium were not considered. at the end of experiment, 144 birds were sacrificed by cervical dislocation for the purpose of determining the tibia breaking strength, calcium and ash levels in their tibias. according to the biological values observed for the chickens, the estimated calcium requirements were of 1.02% for broilers from 1 to 21 days old. however, according to the tibia breaking strength, the calcium requirement suggested for broilers from 1 to 21 days of age would be 1.20%. the average values of relative calcium availability were 99.99% for dicalcium phosphate, 84.67% for calcitic limestone and 75.28% for dolomitic limestone.
Exigência nutricional de lisina digestível para galinhas poedeiras no período de 34 a 50 semanas de idade
, Luciano Moraes;Gomes, Paulo Cezar;Rostagno, Horacio Santiago;Albino, Luiz Fernando Teixeira;D'Agostini, Priscila;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000800016
Abstract: with the objective to establish the nutritional requirement of lysine for light and semi-heavy laying hens, in the period from 34 to 50 weeks old, 360 laying hens (half lohmann and half lohmann brown) were submitted to a basal ration containing 2.850 kcal me/kg, 15.0% cp, supplemented with five levels (0.00, 0.05, 0.10, 0.15 and 0.20%) of l-lysine, to provide 0.584, 0.634, 0.684, 0.734, and 0.784% of digestible lysine in the rations. a 5 x 2 (lysine level and laying hen strain) factorial arrangement, with six replications per treatment and six hens per experimental unit in a completely randomized design was used. egg production (%), egg mass and average egg weight (g), feed intake (g/hen.day), feed conversion (kg feed /egg dozen), body weight change (g) and internal egg quality (haugh unit, albumen and yolk index) were evaluated. the lysine levels did not affect the body weight change, feed intake and egg quality in both laying hen strains. feed conversion and egg production, average egg weight and egg mass were positive influenced by the lysine level, in light and the semi-heavy. the digestible lysine requirement estimated by quadratic model, for the light and the semi-heavy laying hens, was 0.732 and 0.715% in the ration, corresponding to the daily intake per hen of 893 and 804 mg lysine/day, respectively.
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