A number of true amino acid digestibility assays were conducted in adult roosters on a range feedstuffs. Using these feedstuff batches, different broiler starters and growers formulated. corn-soy positive control diet with high (HD) was compared to another using various by-products partially replace corn soybean meal. This second low (LD) formulated contain the same levels total lysine sulfur acids as HD. third (LD + AA) similar LD, but L-lysine•HCl DL-methionine added obtain digestible...

Studies were conducted on the performance of chicks fed diets containing either a bird resistant sorghum (BR64) or an intermediate (NK300) as compared with that observed when susceptible (RS610) corn cereal grain. Chicks BR64 exhibited poorer growth and feed conversion RS610. In general, NK300 was between other two sorghums. consistently superior weight gains and, in some cases, various diets. Weight decreased tannic acid added to corn, RS610 level found diet. The still those diet acid....

Two independent experiments were conducted with male Cobb × 500 broilers to determine the optimal valine-to-digestible-lysine ratio for broiler development. We a randomized block experiment 7 treatments, each 8 replicates of 25 starter birds (8 21 d age) and 20 finisher (30 43 birds. To prevent any excess digestible lysine, 93% recommended level lysine was used evaluate valine-to-lysine ratio. The utilized levels dietary 10.7 9.40 g/kg starting growing phases, respectively. A control diet...

Three experiments were conducted to evaluate the effect of β-mannanase BM: supplementation on performance, metabolizable energy, amino acid digestibility, and immune function broilers. A total 1,600 broilers randomly distributed in a 4 × 2 factorial arrangement (4 nutritional levels 0 or 500 g/ton BM), with 10 replicates 20 per pen. The same design was used energy digestibility 8 6 replicates, respectively, : NL formulated meet requirements NL1 ; reductions 100 kcal NL2 3% acids (NL3); (NL4)...

Studies were conducted to determine apparent and corrected amino acid digestibility of sorghums varying in tannin content. The effects adding tannic low sorghum a protein-free diet also investigated. Supplementation with 1.41% resulted 4-fold increase endogenous excretion. addition provide produced relatively small decrease which could be accounted for by the Apparent digestibilities intermediate high content greatly lower than or plus equivalent sorghums. all acids low, varieties was 73, 41...

Dois experimentos foram conduzidos para determinar os valores de energia metabolizável aparente (EMA) e verdadeira (EMV) 11 alimentos (amostras milho seus subprodutos milheto), utilizando o método tradicional coleta total excretas, com pintos em crescimento da alimentação forçada, galos adultos (método Sibbald). No exp. I, 540 Hubbard machos receberam as rações experimentais quatro repetições 10 aves cada, exceto a ração referência, qual foi fornecida seis repetições. II, cada um dos...

The objective of this study was to evaluate the effect feeding herbal extracts for broilers on performance and histology intestinal mucosa its effects profiting from metabolizable energy experimental diets. For so, two experiments were conducted. In experiment I, inclusion different in diets evaluated, II, values apparent corrected by nitrogen balance studied. Treatments consisted of: positive control diet; + avilamycin; negative control; 100 ppm a complex containing three medicines (pepper,...

Foram realizados quatro ensaios de metabolismo com a finalidade determinar energia metabolizável aparente (EMA) e corrigida (EMAn) dez alimentos em aves diversas idades. Os testados foram: milho, farelo soja, sorgo, trigo, arroz integral, duas farinhas penas, vísceras plasma sangüíneo. Utilizou-se o método coleta total excretas, delineamento experimental inteiramente casualizado, 11 tratamentos (dez uma ração-referência) seis repetições. No primeiro ensaio, foram utilizados 528 pintos corte...

Three experiments were carried out to estimate the optimal ratios of digestible phenylalanine + tyrosine (Phe Tyr), histidine (His), and leucine (Leu) relative lysine (Lys) for performance carcass criteria Cobb-500 broilers from 8 17 d age. In each experiment, 160 male chicks allocated a completely randomized experimental design with eight replicate pens, receiving five dietary treatments. A common, semi-purified basal diet was formulated meet all recommendations except those tested amino...

Abstract Background Selenium (Se) has been recognized as an essential micronutrient for nearly all forms of life. In recent decades, broiler responses to dietary Se supplemental levels and sources have received considerable attention. On environmental grounds, organic trace mineral utilization in practical feeds defended due its higher bioavailability. such feeds, minerals are provided simultaneously the same supplement inorganic salts or chelates, a fact commonly ignored assays conducted...

Abstract 1. The net absorption and the biological efficacy of DL‐methionine hydroxy analogue free acid (MHA‐FA) were evaluated in chickens under heat stress. 2. In a growth assay, finishing broilers 21 to 42 d age fed on diets containing graded amounts two supplements; basal diet was composed practical ingredients. 3. From slope‐ratio analysis, equimolar MHA‐FA relative determined be 83% (confidence limits 61 115%) from weight gain responses, 67% (47 91%) food conversion responses. This...

RESUMO - O efeito da temperatura ambiente sobre desempenho e características de carcaça frangos corte alimentados com dieta controlada dois níveis energia metabolizável foi avaliado. Cento sessenta machos Hubbard, 21 dias idade, 791+4,12 g peso médio inicial, foram alojados em termoneutra (23,3±0,58ºC) ou quente (32,3±0,31ºC) até 42 idade. delineamento experimental inteiramente casualizado, esquema fatorial 2 x (nível [3075 3300 kcal EM/kg] [termoneutro calor]), cinco repetições oito aves...

Três experimentos foram conduzidos com o objetivo de avaliar a utilização do alho na alimentação frangos corte, como promotor crescimento. No primeiro experimento, utilizados 480 pintos sexados, distribuídos em seis tratamentos oito repetições (quatro machos e quatro fêmeas), dez aves cada uma. Os foram: ração basal milho, farelo soja fosfato bicálcio (RB1); RB1 + 0,2% alho; 0,4% alho, 0,6% 0,001% lincomicina 0,0025% bacitracina zinco. segundo utilizaram-se 240 três fêmeas) farinha carne...

This paper reports the results of a growth study with subsequent carcass analysis to investigate potential betaine replace DL-methionine as an essential amino acid supplement in broiler diets. Starter and grower diets were formulated be deficient sulfur acids, then supplemented various combinations betaine. All choline chloride ensure adequate methyl group supply. Growth, feed conversion, breast meat yield significantly improved by added DL-methionine, but not There was no evidence that can...

Com o objetivo de estabelecer a exigência nutricional treonina digestível para poedeiras leves e semipesadas no período 34 50 semanas idade, 580 (metade Lohmann metade Brown) foram submetidas uma ração basal contendo 2.850 kcal EM/kg, 14.0% PB, suplementada com cinco níveis (0,00; 0,035; 0,07; 0,105 0,140%) L-treonina, modo proporcionar 0,410; 0,445; 0,480; 0,515 0,550% nas rações. Foi utilizado esquema fatorial 5 x 2 (nível linhagem aves), seis repetições por tratamento aves unidade...

Foram determinados a composição química e os valores de energia metabolizável aparente (EMA) corrigida pelo balanço nitrogênio (EMAn) seis alimentos origem vegetal utilizando-se o método coleta total excretas. Utilizaram-se 252 pintos corte machos da linhagem Ross, com 21 dias idade, distribuídos em um delineamento inteiramente casualizado, sete tratamentos (uma ração-referência rações-teste), repetições aves por unidade experimental. Os avaliados foram milho (MI), alta gordura (MAG),...

Este experimento foi conduzido com a finalidade de determinar os valores energia metabolizável aparente (EMA) e corrigida pelo balanço nitrogênio (EMAn) analisar composição química alguns alimentos. Utilizou-se o método tradicional coleta total excretas pintos corte machos nos períodos 21 30 dias 41 50 idade. As aves foram distribuídas em delineamento inteiramente casualizado, 11 dietas, 10 alimentos-teste uma dieta-referência), cada seis repetições quatro por unidade experimental para...

Four experiments were conducted to study the requirements of available phosphorus (aP) for commercial male broilers 1-10 day age (exp.1), 11-21 days (exp. 2), 22-33 3) and 34-46 4), at a constant calcium:aP ratio. A complete randomized design was used in each experiment. The experimental diets fed ad libitum 8 replicate groups ten each. increments levels aP ranged from 2.0 5.5 g/kg 1), 1.9 5.4 1.8 5.3 1.7 5.2 0.7 g/kg. parameters evaluated body weight gain, feed intake, conversion ratio bone...

The experiment was conducted to determine the nutritional requirement of calcium and best calcium:available phosphorus ratio for commercial layers at post-laying peak. A total 324 Hy-Line W-36 laying hens were utilized in period from 42 58 weeks age, distributed a completely randomized design 3 × factorial arrangement, composed three levels (39, 45 g/kg) calcium:phosphorus ratios (12.12:1; 10.53:1; 9.30:1), totaling nine treatments with six replications birds per experimental unit. There no...

Two experiments were conducted to evaluate the effect of titrated levels spray-dried plasma (SDP) in broilers diets submitted various types health challenge. In experiment 1, dietary (%) during periods 1 7, 8 21, and 22 42 d T1 (0/0/0), T2 (1.5/0/0), T3 (1.5/0.5/0), T4 (3.0/0/0), T5 (3.0/0.5/0), respectively. 2, (1.5/0.5/0.25) fed 8, 9 d, both experiments, flock uniformity livability not affected by SDP. SDP addition resulted lower feed intake (FI) improved FCR from 21. Lower FI was also...

This research aimed to evaluate the influence of a commercial prebiotic in different concentrations upon several parameters. To carry out experiment, 640 male one-day-old broiler chicks were distributed four treatments (0, 0.5, 1.0, and 1.5 kg/ton yeast cell wall) with eight replicates 20 birds per experimental unit, randomized blocks. Prebiotic effects assessed on performance, carcass yield prime cuts, addition litter quality (its content nitrogen phosphorus). There [...]

O experimento foi realizado com objetivo de estudar o uso mananoligossacarídeos (standard e concentrado) em rações para frangos corte. Foram utilizados 1.080 pintos corte machos da marca Ross, peso médio inicial 42 g, distribuídos um delineamento inteiramente ao acaso, seis tratamentos nove repetições 20 aves por unidade experimental. As foram criadas cama maravalha reaproveitada, utilizada anteriormente outro lote. testados os tratamentos: testemunha, antibiótico (avilamicina),...