Navegando por Autor "Petrolli, Tiago Goulart"
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Item Addition of capsaicin in the diet of turkeys: effects on growth performance and antioxidant and oxidant status in serum and in meat(Brazilian Journal of Animal Science, 2023-10-23) Zanotto, Marlon José; Pagnussatt, Heloísa; Valentini, Fernanda Danieli Antoniazzi; Dal Santo, Alicia; Leite, Felipe; Mis, Gilso; Zaccaron, Gustavo; Galli, Gabriela Miotto; Calderano, Arele Arlindo; Tavernari, Fernando de Castro; Silva, Aleksandro Schafer Da; Paiano, Diovani; Petrolli, Tiago GoulartThe objective of this study was to evaluate whether the addition of different levels of capsaicin in the diet of female turkeys has beneficial effects on growth performance and the antioxidant and oxidant status in serum and meat. A total of 150 female turkeys were distributed in a completely randomized design with three treatments with five replicates per treatment and ten birds per experimental unit. Treatments were identified as control (without additive); T400 – basal diet containing 400 mg/kg of pepper extract per kg of feed; and T800 – basal diet supplemented with 800 mg/kg of pepper extract per kg of feed. Growth performance was measured on days 1 and 20 of the experiment. Blood samples were collected at 20 days of the experiment for analysis of the oxidant and antioxidant status, and at 20 days, five birds were euthanized per treatment for the analysis of the oxidant and antioxidant status of the meat. The turkeys fed diet supplemented with capsaicin had lower feed intake and better feed:gain ratio. Turkeys in the T800 treatment showed a reduction in serum levels of reactive oxygen species (ROS) and thiobarbituric acid, and this same effect was observed for ROS in their breast meat. Capsaicin supplementation improves feed conversion and reduces feed intake without altering weight gain in female turkeys. Furthermore, the addition of 800 g/ton reduces lipid peroxidation and protein oxidation in the serum and reduces protein oxidation in broiler turkey meat.Item Eucalyptus oil to mitigate heat stress in broilers(Brazilian Journal of Animal Science, 2019-02-21) Petrolli, Tiago Goulart; Sutille, Maria Aparecida; Petrolli, Osmar José; Stefani, Lenita Moura; Simionatto, Anderson Tiecher; Tavernari, Fernando de Castro; Zotti, Claiton André; Girardini1, Lilian KollingThe objective of this study was to evaluate performance, hematological parameters, leukocyte counts, and respiratory microbiota of broilers under heat stress receiving eucalyptus oil supplementation. Cobb broilers (n = 1200) were randomly distributed on the first day of life in a factorial arrangement with additional treatment (2 × 2 + 1) with two periods of oil administration via drinking water (daily, from 18 to 35 days of life) and two periods of oil administration via spray (daily, from 18 to 35 days of age) plus a control treatment, consisting of twelve replications, with 20 animals each. The birds were kept in a controlled environment with constant temperature at 32 °C to induce heat stress by infrared heaters. Eucalyptus oil was supplied by drinking water (1 L of oil to 4000 L of water) or by spray applications with a pump (1 L of oil to 200 L of water). Bird weight was recorded at 42 days of age, along with remaining feed, to determine weight gain, feed intake, and feed conversion. In addition, one blood sample from each bird repetition was collected for hematological and leucocytic evaluation. To assess respiratory microbiota, a tracheal flushing was performed for bacteria counts. There was no difference in performance, hematological parameters, and leukocyte counts, except hematocrit, which was lower in birds that received eucalyptus oil after 18 days of age. No significant differences were observed in the respiratory microbiota comparing oil-treated and -untreated groups. Although it was not possible to verify statistical difference, the birds that received eucalyptus oil via spray plus spray from 18 days old showed lower bacterial counts and absence of isolation of Gram negatives, while the control group was the one with the highest number of Gram negatives. Therefore, eucalyptus oil can be used for heat-stressed broilers without impairing their developmentItem Evaluation of liquid xylanase and phytase added after broiler feed pelletization(Brazilian Journal of Animal Science, 2023-09-18) Tobias, Géssica Paula; Fabiani, Leonardo Miguel; Pagnussatt, Heloísa; Santo, Alicia Dal; Lima, Marcos de; Leite, Felipe; Facchi, Caroline Schmidt; Zaccaron, Gustavo; Hoinoski, Gabriel; Aniecevski, Edemar; Alves, Maurício Vicente; Galli, Gabriela Miotto; Stefani, Lenita Moura; Tavernari, Fernando de Castro; Petrolli, Tiago GoulartThe objective of this study was to evaluate whether the addition of the enzymes phytase and xylanase, isolated or associated, in the liquid form after feed pelletization could improve energy utilization and digestibility of calcium and phosphorus by broiler chickens. Three experiments were performed using 120 birds each, divided into five treatments with eight replicates per group (n = 3), identified as: experiment 1 (xylanase: control, 1000 IU, 1500 IU, 2000 IU, 2500 IU), experiment 2 (phytase: control, 500 FTU, 1000 FTU, 1500 FTU, 2000 FTU), experiment 3 (xylanase + phytase: control, 3000 IU + 500 FTU, 3000 IU + 1000 FTU, 3000 IU + 1500 FTU, 3000 IU + 2000 FTU). Samples for digestibility tests were collected at 14 to 21 days of age. Therefore, the inclusion of liquid phytase and liquid phytase + xylanase after pelletization in broiler diets has become a relevant way to reduce the inclusion of inorganic P, which can reduce the cost of feed and P excretion in the environment. Furthermore, it is an interesting strategy to avoid enzyme denaturation in the pelleting process.Item Extratos Herbais em Dietas de Frangos de Corte(Universidade Federal de Viçosa, 2009-12-22) Petrolli, Tiago Goulart; Rostagno, Horácio Santiago; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783356H5; Gomes, Paulo Cezar; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780386Y6; Albino, Luiz Fernando Teixeira; http://lattes.cnpq.br/7930540518087267; http://lattes.cnpq.br/4882075434910786; Barreto, Sérgio Luiz de Toledo; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4796216J5; Cupertino, Edwiney Sebastião; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4770972U6Foram conduzidos dois experimentos no setor de avicultura do Departamento de Zootecnia da Universidade Federal de Viçosa. No experimento I, pretendeu-se avaliar a inclusão de diferentes extratos herbais em dietas sobre o desempenho e a histologia intestinal de frangos de corte, e no experimento II objetivou-se determinar os valores de energia metabolizável aparente (EMA) e de energia metabolizável aparente corrigida pelo balanço de nitrogênio (EMAn) das dietas experimentais. No experimento de desempenho foram utilizados 960 frangos de corte machos no período de 1 a 40 dias de idade, distribuídos em um delineamento em blocos casualizados, com seis tratamentos e oito repetições, com 20 aves em cada unidade experimental. Os tratamentos consistiram de uma dieta Controle Positivo (CP) + avilamicina; uma dieta CP; uma dieta Controle Negativo (CN); uma dieta CN + 100ppm de um complexo contendo três diferentes fitoterápicos (pimenta, canela e orégano); uma dieta CN + 75ppm extrato de alho; e uma dieta CN + 150ppm de extrato de alho. No experimento II foi utilizado o método tradicional de coleta total de excretas com pintos de corte machos, no período de 14 a 24 dias de idade, em delineamento inteiramente casualizado, com seis tratamentos e oito repetições, contendo cinco aves por unidade experimental. Os tratamentos avaliados foram os mesmos utilizados no experimento I. O tratamento controle negativo foi inferior aos demais tratamentos, onde não foram encontradas diferenças significativas entre os outros tratamentos nos parâmetros de desempenho (consumo, ganho de peso e conversão alimentar). A altura das vilosidades intestinais foi melhorada com a adição do composto contendo os três extratos herbais, porém a profundidade de cripta e a relação vilo/cripta não foram afetadas. Os princípios ativos dos extratos herbais não promoveram incremento no aproveitamento EMA e da EMAn.Item Glycosaminoglycans and vitamin C in ovo feeding affects bone characteristics of chicks(Brazilian Journal of Animal Science, 2018-11-10) Santos, Elaine Talita; Sgavioli, Sarah; Castiblanco, Diana Maryuri Correa; Domingues, Carla Heloísa de Faria; Quadros, Thays Cristina Oliveira de; Borges, Liliana Longo; Petrolli, Tiago Goulart; Baraldi-Artoni, Silvana MartinezDifferent levels of glycosaminoglycans (chondroitin sulfate and glucosamine sulfate) and vitamin C were injected in ovo to determine whether additive use influences the incubation parameters and bone characteristics of posthatch chicks. Hatchability was not affected by addition of glycosaminoglycans and vitamin C in ovo. However, chicks that received 4 µg additive showed 2.86% reduction in total mortality when compared with chicks from non-injected eggs. Moreover, tibia area and femur bone mineral density increased in chicks from eggs injected with 2.16 and 6.00 µg of additive, respectively. In ovo feeding with glycosaminoglycans and vitamin C can benefit bone development in embryos and reduce total mortality during the incubation periodItem Herbal extracts in diets for broilers(Revista Brasileira de Zootecnia, 2012-01-24) Petrolli, Tiago Goulart; Albino, Luiz Fernando Teixeira; Rostagno, Horacio Santiago; Gomes, Paulo Cezar; Tavernari, Fernando de Castro; Balbino, Eric MárcioThe objective of this study was to evaluate the effect of feeding herbal extracts for broilers on performance and histology of the intestinal mucosa and its effects on the profiting from the metabolizable energy of experimental diets. For so, two experiments were conducted. In experiment I, the inclusion of different herbal extracts in diets on performance and intestinal histology of broilers was evaluated, and in experiment II, the values of apparent metabolizable energy and metabolizable energy corrected by the nitrogen balance of the experimental diets were studied. Treatments consisted of: positive control diet; positive control + avilamycin; negative control; negative control + 100 ppm of a complex containing three different herbal medicines (pepper, cinnamon and oregano); negative control + 75 ppm garlic extract; negative control + 150 ppm garlic extract. In the performance experiment, which comprised the period of 1 to 40 days of age, 960 male broilers were distributed in a randomized block design, with six treatments and eight replicates, with 20 birds per experimental unit. In experiment II, the method adopted was the traditional of total excreta collection with male broiler chicks in the age of 14 to 24 days, in a completely randomized design, with six treatments and eight replicates with five birds per experimental unit. The intestinal villus height was improved with addition of the composite containing the three herbal extracts; however, crypt depth and villus/crypt ratio were not affected. The use of herbal extract in diets for broilers promotes performance similar to that with the use of antibiotics. Herbal extracts can be incorporated into diets replacing antibiotics without compromising the metabolizable energy of diets, performance or intestinal mucosa for broilers in the period of 1 to 40 days of age.Item Metabolizable energy equivalence of guanidinoacetic acid in corn soybean meal-based broiler diets(Brazilian Journal of Animal Science, 2023-04-06) Salgado, Hallef Rieger; Rocha, Gabriel Cipriano; Petrolli, Tiago Goulart; Schmidt, Marlene; Rivera, Jose Antonio; Nunes, Rayanne Andrade; Borges, Samuel Oliveira; Calderano, Arele ArlindoIn this study, we evaluated how guanidinoacetic acid (GAA) addition in diets with various metabolizable energy (ME) contents affects the performance of broiler chickens. We also estimated the equivalence of GAA in ME. We distributed 1,280 one-day-old broilers in a completely randomized design with eight treatments, eight replicates, and twenty birds per experimental unit. Treatments were based on ME levels (2,775-2,875-2,975 kcal/kg; 2,850-2,950-3,050 kcal/kg; 2,925-3,025-3,125 kcal/kg; or 3,000-3,100-3,200 kcal/kg, from 1 to 7, 8 to 21, and 22 to 42 days of age) and the inclusion of GAA (0 or 600 mg/kg). Supplementation of GAA increased weight gain in broilers at an energy level of 2,908 kcal/kg and improved feed conversion ratio (FCR) at energy levels of 2,908 and 2,983 kcal/kg. There was a linear reduction in feed intake and an improvement in FCR of broilers with increasing levels of energy in diets, with and without GAA addition. Solving the equivalence equation, by applying each of the weighted average energy levels studied. indicates the GAA equivalence of 133, 103, 74, and 44 kcal/kg of diet. In conclusion, GAA supplementation improves broilers’ efficiency of energy use; the average ME equivalence of 600 mg/kg of GAA is 88.5 kcal/kg