TCC - Zootecnia (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/478
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Resultados da Pesquisa
Item Qualidade de ovos armazenados à temperatura ambiente de poedeiras alimentadas com dietas contendo simbiótico(2023-04-21) Siqueira, Monique Aguiar; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/3658833045052053The study evaluated the effects of using the symbiotic in the diet of laying hens from the rearing, rearing or production phase, replacing zinc bacitracin on the quality of eggs produced in the post-peak phase stored at room temperature. 198 birds of the Dekalb White strain, aged 70 weeks, evaluated up to 90 weeks were used. For the evaluation of egg quality, the experimental design used was completely randomized in a 6 x 3 factorial scheme, with 6 experimental diets and 3 storage periods, determined at 0, 7 and 14 days, with 6 replications. The experimental diets consisted of a diet composed of corn and soybean meal without additives (RR); diet composed of corn, soybean meal and including meat and bone meal without additives (MBM); and four more rations based on the MBM diet with the addition of additives, namely, a diet with the addition of 0.05% of the Zinc Bacitracin additive from the start phase (MBM+Bac Zn); diet with the addition of 0.1% of the Symbiotic additive from the start phase (MBM+Simb-SF); diet based on MBM with the addition of 0.1% of the Symbiotic additive from the grower phase (MBM+Simb-GF), and the last diet based on MBM with the addition of 0.1% of the symbiotic additive from the production phase (MBM+Simb-PF). For the quality evaluation, 108 eggs were collected from birds at 80 weeks of age, shortly after laying. were submitted to the analysis of variance. After finding significance, the data were submitted to the Tukey test (p<0.05) and analyzed using the mixed model, using the SAS statistical package. The diets significantly influenced the variable yolk color, where the treatment with zinc bacitracin obtained the highest value, and albumen pH, influenced by the addition of MBM. On the other hand, all variables were influenced by storage time, indicating that prolonged storage periods contribute to a decrease in egg quality, regardless of the type of additive or the period of use. Thus, the symbiotic additive can be used as an alternative to zinc bacitracin because it presents results, about egg quality, similar to those where the antibiotic additive is used, except for the color intensity of the yolk. Also, the additives used, regardless of the inclusion phase, were not able to reduce the effects of storage time on egg quality.Item Níveis de manganês complexado a aminoácidos na dieta de poedeiras comerciais em fase de cria: indicadores de bem-estar animal(2022-10-07) Macedo, Juliana Belens de; Souza, Lilian Francisco Arantes de; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/6015344715032401; http://lattes.cnpq.br/1613661031404158The objective was to evaluate the effects of manganese inclusion levels complexed with amino acids in the diet of commercial laying hens during the brooding phase on indicators of animal welfare. The research was developed at the Departamento de Zootecnia of the Universidade Federal Rural de Pernambuco. The experiment had 648 Dekalb White chicks distributed in a completely randomized design in six treatments, with six replications of 18 hens each. The provided diets had different levels of inclusion of manganese mineral complexes to amino acids of 25, 37, 49, 61, 73 and 85 mg/kg. Welfare indicators were evaluated at 35 days in 18 hens per replicate. The lesions on the keel, skin and comb, footpad and plumage condition were evaluated. The data obtained were submitted to the chi-square test or G test in the BioEstat 5.3 software, using a significance level of 5% (p < 0.05), and presented in the results in percentage frequency (%). It was found that there was no effect of the levels of inclusion of manganese complexes to amino acids on some indicators, such as keel injuries, crest and footpad injuries and condition and damage to the plumage, which indicated that the supplementation level of 25 mg/ kg can be applied to diets with phytase inclusion, without harming the welfare of laying hens in the brood phase. However, it was found that for better skin integrity, the inclusion of the 85 mg/kg level of manganese complexed to amino acids is recommended.Item Níveis de zinco complexado a aminoácidos na dieta de poedeiras comerciais em fase de cria: indicadores de bem-estar animal(2022-10-07) Barros, Tatiane Amaral de; Souza, Lilian Francisco Arantes de; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/6015344715032401; http://lattes.cnpq.br/6999911364398368The present study aimed to evaluate the effects of inclusion levels of zinc complexed to amino acids in the diet of commercial laying hens in the brooding phase, on welfare indicators related to bone development, feathering and tegument. A total of 648 Dekalb White chicks were used, from 1 to 35 days of age. The birds were housed in cages with the density recommended by the manual and distributed in a completely randomized design, consisting of 6 treatments, of 6 replicates and 18 birds per experimental unit, totaling 36 experimental units. The treatments consisted of a diet formulated with corn and soybean supplemented with 18, 30, 42, 54, 66 and 78 mg/kg of amino acid-complexed zinc, respectively. Water was provided ad libitum and the ration adjusted weekly according to the needs of the birds and the lineage manual. Welfare indicators were adapted and evaluated based on the Welfare Quality protocol for laying hens during the first 6 weeks of life. Amino acid-complexed zinc supplementation did not influence welfare indicators when aspects such as injury to the keel, skin, crest and foot pad, as well as plumage cover, deficiency and damage to the plumage in the brooding phase were observed.Item Qualidade de ovos de poedeiras comercias alimentadas com dietas contendo aditivo simbiótico e armazenado sob refrigeração em diferentes tempos(2021-06-09) Ribeiro, Kalinina Machado; Rabello, Carlos Bôa Viagem; http://lattes.cnpq.br/4760288746238700; http://lattes.cnpq.br/5124661483020998The aim of this study was to evaluate the quality of eggs from commercial laying hens fed diets containing symbiotic additive and stored under refrigeration at different periods. One hundred and eighty eggs were collected soon after laying in a completely randomized experimental design in a 6x5 factorial scheme (diet x storage period 0, 7, 14, 21, 28), where 36 eggs were analyzed on the same day and the remaining 144 eggs were refrigerated. (±5.0°C). The variables analyzed were: egg weight (g), yolk color, albumen height (mm), albumen weight (g), yolk weight (g), shell weight (g), shell thickness (mm) , albumen pH and HU. Data were submitted to the Tukey test (p<0.05) and analyzed by the statistical process PROC MIX of the SAS 2018 statistical package. For the yolk color and albumen pH, a statistical effect was found (p<0.001) for the treatments and periods evaluated, with lower albumen pH in the reference treatment and on day 0, where in the other treatments and periods there was an increase in the pH of the albumen. Regarding the HU, the storage period significantly influenced (p<0.01) the values, where the effect of temperature became evident from the 7th day of storage, when the HU reduces, bringing changes in the internal quality of the eggs, but the eggs stored at refrigerated temperature, the quality remained even differing from day 0, where at 28 days of storage, they showed excellent quality pattern (AA). Thus, it is concluded that the longer the storage period, the lower the internal quality of the eggs, but when stored under refrigeration this effect can be minimized, in addition to zinc bacitracin and symbiotics, did not show relevant significant differences, and may the symbiotic being a replacement alternative for zinc bacitracin.