Probiótico e enzimas em dietas de frangos de corte: desempenho, características da cama e excretas e produção de biogás
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2013-12-06
Autores
Praes, Maria Fernanda Ferreira Menegucci [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O objetivo do estudo foi avaliar os efeitos de probióticos e enzimas em frangos de corte e sua ação sobre a cama e excretas na produção de biofertilizante e biogás. Foram utilizados 900 pintos de corte da linhagem Cobb 500®, distribuídos em um delineamento inteiramente casualizado, com 4 tratamentos e 9 repetições com 25 aves cada. Os tratamentos consistiram em diferentes tipos de dietas: T1: controle; T2: T1 + 500 ppm do probiótico contendo Bacillussubtilis e Bacilluslicheniformis; T3: dieta formulada com 20 ppm da enzima fitase, 200 ppm de protease e 200 ppm de xilanase; T4: T3 + 500 ppm do probiótico. As características avaliadas foram o desempenho, o rendimento de carcaça e de partes, a morfometria intestinal, a densitometria óssea, a produção, a composição química e os potenciais de produção de biogás de cama (biodigestoresdo tipo contínuo e batelada)e excretas (biodigestores do tipo batelada) de frangos de corte. As camas e as excretas foram distribuídas em biodigestores com 4 repetições por tratamento. Foi realizada a análise de variância dos dados e em caso de significância estatística foi adotado o procedimento de comparação das médias pelo Teste de Tukey a 5% de probabilidade. A adição de probiótico+enzima proporcionou a pior conversão alimentar, aumento da altura de vilosidades de todos os segmentos intestinais aos 21 dias de idade e reduziu a quantidade de lignina da fração fibrosa da cama de frangos. O tratamento contendo somente enzimas aumentou a altura das vilosidades aos 42 dias de idade, o volume de biogás, a produção de metano e potencial de produção de biogás porsólidos totais e voláteis adicionados e reduzidos quando as camas de frango foram tratadas em biodigestores contínuos...
The main aim of this research was to evaluate broilers diet probiotic and enzymes addition and their action over excreta and poultry litter used for biofertilizer and biogas production. In a completely randomized design, there were used 900 lineage Cobb 500R broiler chicks on 4 treatments with 9 repetitions each one with 25 birds. Different diets composed the treatments: T1: control diet without additives; T2: T1 plus 500 ppm of probiotic containing Bacillus subtilis and Bacillus licheniformis; T3: T1+ 20 ppm of phytase enzyme, 200 ppm of protease and xylanase; T4: T1+T2+T3. Broilers performance, carcass yield and its parts, intestinal morphology, bone densitometry, production, chemical composition and their biogas potential production of excreta (batch biodigesters) and poultry litter (continuous and batch biodigesters), were the characteristics evaluated. The excreta and poultry litter were used on biodigesters with 4 repetitions for each treatment. Data variance analysis was performed, in case of significance it was used Tukey Test for average comparison with a probability of 5 %. The worst feed was obtained with enzyme+probiotic addition, at 21st day of age allintestinal segments had their villi height increased, poultry litter had his lignin fiber fraction amount reduced. At the 42nd days old, villi heights increased using a treatment with a small amount of enzymes, biogas volume, methane production and biogas potential production for TS and VS added and reduced of poultry litter treatedin continuous biodigesters...
The main aim of this research was to evaluate broilers diet probiotic and enzymes addition and their action over excreta and poultry litter used for biofertilizer and biogas production. In a completely randomized design, there were used 900 lineage Cobb 500R broiler chicks on 4 treatments with 9 repetitions each one with 25 birds. Different diets composed the treatments: T1: control diet without additives; T2: T1 plus 500 ppm of probiotic containing Bacillus subtilis and Bacillus licheniformis; T3: T1+ 20 ppm of phytase enzyme, 200 ppm of protease and xylanase; T4: T1+T2+T3. Broilers performance, carcass yield and its parts, intestinal morphology, bone densitometry, production, chemical composition and their biogas potential production of excreta (batch biodigesters) and poultry litter (continuous and batch biodigesters), were the characteristics evaluated. The excreta and poultry litter were used on biodigesters with 4 repetitions for each treatment. Data variance analysis was performed, in case of significance it was used Tukey Test for average comparison with a probability of 5 %. The worst feed was obtained with enzyme+probiotic addition, at 21st day of age allintestinal segments had their villi height increased, poultry litter had his lignin fiber fraction amount reduced. At the 42nd days old, villi heights increased using a treatment with a small amount of enzymes, biogas volume, methane production and biogas potential production for TS and VS added and reduced of poultry litter treatedin continuous biodigesters...
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Palavras-chave
Probióticos, Biogas, Biodigestor, Biofertilizantes, Biofertilizers
Como citar
PRAES, Maria Fernanda Ferreira Menegucci. Probiótico e enzimas em dietas de frangos de corte: desempenho, características da cama e excretas e produção de biogás. 2013. x, 167 f. Tese (doutorado) -Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, 2013.