This study evaluated the effect of different dietary vitamin E levels and selenium sources on productive reproductive performance broiler breeders. In total 640 females 64 males between 22 52 weeks old were studied. A completely randomized experimental design in factorial arrangement, with 4 treatments 8 replicates 20 2 each, was applied. Treatments consisted (30 120 mg/kg) two (sodium selenite zinc-L-selenomethionine). Egg production (rate lay eggs per breeder), egg characteristics (egg,...

This experiment was conducted to study the effect of different feeding programs and pelleting on performance, nutrient digestibility, ileal digestible energy (IDE); carcass yield broilers from 21 35 d age. In total, 768 male were distributed according a completely randomized design with 6 treatments 8 replicates 16 birds each. The mash pelleted diets provided ad libitum, or supplied at same rate (100%) restricted 95, 90, 85% (P100, P95, P90, P85) amount consumed by fed diet libitum. When had...

1. This work investigates the apparent metabolisable energy (AME), its nitrogen-corrected form (AMEn) and amino acid (AA) digestibility coefficients of microalgae Spirulina platensis as an ingredient in broiler chicken diets. 2. One group birds was fed with a basal control diet (BD), another test composed BD addition at proportion 200 g/kg. AME AMEn were assessed by total excreta collection indigestibility analysis using acid-insoluble ash (AIA) marker. 3. The comprised 888.0 g/kg dry matter...

Feed form is well recognized to improve broiler performance, specially by increasing feed intake (FI). However, when different diet energy levels are used, the results differ in literature. Therefore, this experiment was conducted evaluate influence of and dietary metabolizable (ME) on carcass yield digestibility DM, CP, starch gross energy. In total, 1152 male Cobb 500 broilers were evaluated between 35 47 days. The birds distributed according a completely randomized design 2 × 4 factorial...

Pelleting is the most common heat processing method used in poultry feed industry and quality of directly impacts efficiency utilization feedstuffs by broilers, consequently, their performance. The objective this experiment was to evaluate influence conditioning temperature on pellet physical quality, apparent ileal digestibility coefficients dry matter (CIADDM), crude protein (CIADCP) starch (CIADstarch), coefficient metabolizability (CAMDM), metabolizable energy content (AME) diets. live...

Ca and P homeostasis across the egg-laying cycle is a complex process involving absorption in small intestine, reabsorption/excretion kidneys, eggshell gland secretion. Diets with inadequate calcium phosphorus can interfere their digestibility, resulting quality losses reduced productive life, affecting egg production welfare. A better understanding of gene expression profiles kidneys laying hens during late period could clarify renal role mineral metabolism at this stage. Therefore,...

Broiler energy nutrition has attracted attention due to its economic importance, particularly during the rearing period of 22-42 days age. There are many evidences that broilers changed their feed intake capacity genetic selection, especially when good quality pellets fed, which suggests modern broiler strains may achieve performance fed low metabolizable levels. The objective was evaluate efficiency, parameters, bone and carcass yield 22- 42-d-old diets with levels below or above...

In this study, we evaluated the effect of grouping 1-d-old chicks according to initial BW on subsequent homogeneity and distribution weight broilers at harvest. Two treatments (placement methods) were tested: in one treatment (random), chicks' placement was random not grouped by weight; other (homogeneous groups), their weight. The individually weighed upon again 21 42 d age. lowest dispersion observed for homogeneous groups, but did differ between weighings. Despite difference placement,...

ABSTRACT The study was carried out with the objective of evaluating effects using phytase levels at different energy densities in diet broilers, from 28 to 35 days age. experimental diets contained increasing apparent metabolizable corrected for nitrogen balance and phytase. Growth performance variables, nutrient digestibility, as well variables related bone integrity were examined. Diets containing 500 FTU/kg combination 3150kcal.kg-1 AMEn resulted better growth performance. Supplementation...

Neste estudo foi avaliada a adição da enzima fitase (500FTU kg-1) em dietas de diferentes granulometrias (Diâmetro Geométrico Médio - DGM) para frangos corte na fase inicial. As aves foram distribuídas um delineamento experimental inteiramente ao acaso, esquema fatorial 2 (DGM 680µm e 430µm) x (enzima com ou sem Fitase). inclusão tiveram uma redução 10,5% Ca 22% P relação à dieta basal fitase. Foram avaliados desempenho (consumo ração, ganho peso conversão alimentar), o coeficiente...

Objetivou-se com este estudo obter estimativas de correlações genéticas e fenotípicas para características peso aos 7 dias (PES7), 14 (PES14), 28 (PES28) 42 idade (PES42) codornas corte. No galpão criação, foram alojadas 1.022 aves devidamente identificadas, utilizadas avaliação do desempenho produtivo, por meio pesagens individuais. Os componentes (co)variância os parâmetros genéticos estimados procedimentos Bayesianos via amostrador Gibbs utilizando-se o programa MTGSAM. As obtidas 0,73...

ABSTRACT This study evaluated the effect of birth weight and gain during suckling phase on piglet daily nursery (21-61 days age). Piglets (n= 534) derived from 55 first-parity sows were weighed at birth, weaning, end phase. The data analyzed according to a completely randomized experimental design, with three classes (BW) two (SDWG). High BW low SDWG piglets 0.2kg lighter weaning than high animals (P< 0.05). However, phase, this situation was inverted, 2.20kg heavier Low At same time,...

This study examined the relationship between birth weight and growth performance when suckling piglets were reared in litters standardized by weight. Forty-four gilts (Landrace × Large White) due to farrow during same week selected. Piglets born those individually weighed at cross-fostered obtain with 11 (CV, lower than 5%). Based on average weight, 4 litter classes established: class 1 (> 1.10 kg ≤ 1.33 kg), 2 1.34 1.46 3 1.47 1.57 1.58 1.88 kg). At 21 d of age, determine BW calculate ADG...

The objective of this experiment was to evaluate the effect dietary electrolyte balance on live performance and egg quality Japanese quail subjected high temperatures peak. Six hundred birds were distributed, according a completely randomized experimental design, into 5 treatments with 8 replicates 15 each. following values applied: 140, 196, 241, 286, 320 mEq/kg. parameters evaluated production, daily feed intake, mass, conversion ratio. Egg relative weight, specific gravity, yolk eggshell...

An experiment was conducted to test the hypothesis that a coarse limestone diet improves productivity, reproductive performance and calcium utilization of molted broiler breeders. In total, 640 breeder females, 73-week-old sixty-four 27-week-old cockerels, Cobb 500, were evaluated during 10 weeks, according randomized block design composed 4 treatments with 8 replicates each. Treatments consisted diets inclusion 100% fine - PS (0.2 mm GMD geometric mean diameter); PS1: 30% + 70% 1.0 GMD;...

ABSTRACT: The effects of Ca:P total ratio and particle size oyster shell meal (OSM) were evaluated in broiler diets. In Experiment 1, 800 broilers (22-42 days old) distributed a 2×2 factorial design, with two ratios (1.7 2.0:1) OSM sizes (coarse = 1,354 µm fine 428 µm), totaling four treatments 10 repetitions 20 broilers. Feed intake, weight gain, feed conversion calculated. 2, 1,280 2×2×2 design 2.0:1 ratios; coarse OSM; male female broilers), eight 16 Apparent metabolizability dry matter,...

The objective of this study was to evaluate different strategies for the oxidative stabilization rice bran (RB) in diet broiler chickens using natural antioxidant additives, synthetic additives and heat treatment on performance, breast meat quality liver fat content nutrient digestibility coefficients. Furthermore, aimed effects antioxidants, additive treatments, without natural, synthetic, three heat, dry-heat moist-heat, after stored 90 days then incorporated into experimental diets. 1080...

O experimento foi conduzido com o objetivo de avaliar efeito da inclusão ácido linoléico conjugado (CLA) em dietas suínos dos 65kg peso vivo até a fase abate (100kg) sobre desempenho zootécnico, rendimento corte e características carcaça. Foram utilizados 200 provenientes do cruzamento industrial JSR x PIC, igual proporção sexo. Os tratamentos foram compostos por (+CLA) sem (-CLA) adição CLA. delineamento experimental utilizado completamente casualizado, sendo as carcaça avaliadas esquema...

ABSTRACT: Physical form effect of the pre-starter diet supplied during post-weaning period from 21 to 41 days age on digestibility and animal performance in terms zootechnical performances light-weight (5.82kg) heavy-weight weaning piglets (6.32kg) was evaluated, as well residual effects treatments until slaughter. Forty-eight female pigs at were evaluated. The experimental design completely randomized a 2x2 factorial scheme (meal/pelleted vs. light-weight/heavy-weight piglets), with six...

The aim of this study was to assess the influence various diet processing methods and physical forms on digestibility zootechnical performance parameters nursery piglets. performed in 2 phases. first phase twice with 120 piglets per experiment, for a total 240 newly weaned piglets, randomized block design 6 treatments 5 replicates (30 pens). following experimental diets were offered from weaning 21 days after (initial phase) included following: mash (M); conditioned at 60ºC (CM); pelleted...

Abstract The objective of this work was to evaluate the effect use hybrid phytase, alone or combined with carbohydrases, in poultry diets nutritional reductions calcium, available phosphorus, and metabolizable energy on nutrient digestibility bone quality broiler chickens. A total 1,875 broilers were distributed five treatments a completely randomized design, 15 replicates 25 chickens each. consisted positive control feed (T1) four negative controls (T2 T5): T1, basal diet (BD) corn soybean;...