Despite the acknowledged advancements in the utilization of phytase dosing, limited research has been conducted on commercial laying hens. To assess the effectiveness of doses of exogenous phytase, a total of 320 laying hens aged between 44 and 64 weeks were utilized. These hens were divided into five treatments, which were then distributed using a completely randomized design with eight replicates, each containing eight birds. The treatments consisted of phytase supplementation levels of 0, 500, 1000, 1500, and 3000 FTU/kg. Quadratic regression equations were utilized to determine the maximum and minimum values for the levels of phytase supplementation. A significant difference was observed in the levels of phytase supplementation, where a quadratic model was fitted to various variables including egg weight (g), egg mass (g/bird/day), feed conversion per egg mass (g/g), yolk concentration (%), albumen concentration (%), shell thickness (μm), shell strength (kgf), specific gravity, and yolk color. Further, an increased supplementation improved the digestive tract of the hens, thereby providing a better villus–crypt ratio. Considering the advantageous effects of phytase dosing, it is recommended to supplement corn and soybean meal-based diets with 1500 FTU/kg of bacterial phytase for laying hens during the 44- to 64-week production period.

O Brasil apresenta grande potencialidade na produção de carne de frango e é um grande destaque internacional nas exportações dessa proteína. Dentro da agropecuária nacional é classificada como uma das atividades mais bem consolidadas, devido a precariedade de informações sobre comercialização e consumo local da carne de frango o presente estudo apresenta como objetivo a caracterização do consumo e do consumidor na cidade de Salgueiro no estado do Pernambuco. A pesquisa ocorreu no município de Salgueiro-PE, foi usado o método de pesquisa “survey” para coleta das informações da pesquisa com a resolução de questionário, o questionário era composto de perguntas abertas e fechadas e os entrevistados foram selecionados aleatoriamente no estabelecimento de compra. Foram aplicados 364 questionários no período de 19 a 25 de agosto de 2019. Após a coleta de dados, os mesmos foram destinados e convertidos em planilha do programa Excel, que depois de ordenados mediante as construções matemáticas e comparativas, os resultados ficaram apresentados na forma de tabelas e gráficos. Posteriormente, na segunda etapa, os dados foram submetidos aos testes de correlação sendo descritos em gráficos com o software estatístico R Core Team (2022), para a determinação da relação entre dependência de variáveis. A presente pesquisa demonstra uma maior porcentagem dos entrevistados de mulheres (60,40%), sendo que do público entrevistado 26,11% tinham idade de 20 a 25 anos, do total de entrevistados 97,8% afirmam que consomem carne de frango, os que não se alimentam dessa proteína afirmam que o motivo é pelo fato de acreditar no uso de hormônios na dieta dos frangos ou simplesmente por não apreciarem essa carne, 48,9% consomem a proteína do frango diariamente, peito e coxa são os cortes mais consumidos pela comunidade local apresentado para ambos um percentual de consumo igual a 26,7% dos entrevistados. Pode-se concluir que o município de Salgueiro-PE possui potencialidades para o mercado de carne de frango comercial, uma vez que seu consumo demonstrou ser bastante expressivo.

Despite the acknowledged advancements in the utilization of phytase super dosing, limited research has been conducted on commercial laying hens. To assess the effectiveness of superdoses of exogenous phytase, a total of 320 laying hens aged between 44 and 64 weeks were utilized. These hens were divided into five treatments, which were then distributed using a completely randomized design with eight replicates, each containing eight birds. The treatments consisted of phytase supplementation levels of 0, 500, 1000, 1500, and 3000 FTU/kg. Quadratic regression equations were utilized to determine the maximum and minimum values for the levels of phytase supplementation. A significant difference was observed in the levels of phytase supplementation, where a quadratic model was fitted to various variables including egg weight (g), egg mass (g/bird/day), feed conversion per egg mass (g/g), yolk concentration (%), albumen concentration (%), shell thickness (μm), shell strength (kgf), specific gravity, yolk color, and also an increased supplementation improved the digestive tract of the hens, thereby providing a better villus: crypt ratio. Considering the advantageous effects of phytase super dosing, it is recommended to supplement corn and soybean meal-based diets with 1500 FTU/kg of bacterial phytase for laying hens during the 44 to 64 weeks of production period.

This study evaluated the effects of supplementation with Toxfin™ Dry, a mineral adsorbent composed of bentonite and sepiolite, on productive performance, egg quality, intestinal morphometry, serum biochemical parameters, antioxidant status, and sphingolipid metabolism of laying hens challenged with T-2 toxin and fumonisin. A total of 480 Hy-Line W-36 laying hens at 25 weeks of age were distributed in a completely randomized design with six treatments and eight replicates of 10 birds each, over 112 days divided into four 28-day cycles. Treatments consisted of a control diet, either uncontaminated or contaminated with 2 mg/kg T-2 toxin and 60 mg/kg fumonisin B1, with or without 1 kg/ton Toxfin™ Dry. Mycotoxin challenge reduced egg production (p < 0.0001), egg weight (p < 0.0001), egg mass (p < 0.0001), feed intake (p < 0.0001), eggshell strength (p < 0.0001) and thickness (p < 0.0001), Haugh unit (p < 0.0001), and villus ratio (p < 0.0001), while increasing inflammatory and hepatic biomarkers, malondialdehyde levels, and the sphinganine ratio, with more pronounced effects under combined contamination. Supplementation with Toxfin™ Dry mitigated most adverse effects, with responses approaching those of the control group. The adsorbent reduces intestinal mycotoxin bioavailability and helps maintain performance and physiological homeostasis in laying hens.

This study evaluated the inclusion of spray-dried porcine plasma in the diets of broiler chickens derived from breeder hens of different ages (36 and 56 wk), reared under reused litter and high stocking density conditions (12 broilers/m²). A total of 6,000 one-d-old Cobb®500 broilers were randomly assigned to a completely randomized design in a 2 × 4 factorial arrangement: two breeder ages and four plasma inclusion levels (0%, 0.25%, 0.5%, and 1.0%). Evaluations were conducted across five growth phases: 1-7, 8-14, 15-21, 22-33, and 34-44 d, assessing performance, intestinal morphology, microbiological profile, and economic viability. Breeder age significantly influenced final body weight, weight gain, and feed conversion ratio up to 21 d, as well as villus height up to 44 d and crypt depth at d 7, 21, and 44 d. Effects were also observed on breast and eviscerated carcass weight and yield. Plasma inclusion positively impacted performance up to 14 d, improving weight gain, feed intake, and all histological parameters except goblet cell count, which was affected only up to 21 d. Additionally, plasma influenced breast and carcass traits. A significant interaction between breeder age and plasma inclusion was found for final body weight, weight gain up to 14 d, feed intake across all phases, and mortality rate. Microbiological analysis revealed the presence of Escherichia coli and Salmonella spp. in various biological samples throughout the experiment, with higher incidence at d 21 and 44. Dietary inclusion of porcine plasma improved intestinal morphology and zootechnical performance, with optimal supplementation up to 7 d for broilers from older breeders and up to 21 d for those from younger breeders.