Desenvolvimento do sistema digestório de frangos de corte alimentados com farinha de batata doce

Nunes, Juliana Klug; Gonçalves, Fernanda Medeiros; Dallmann, Henrique Müller; Gentilini, Fabiane Pereira; Anciuti, M. A.; Rutz, Fernando; Maier, João Carlos; Silva, J.G.C. da

doi:10.4321/s0004-05922011000400026

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…Não houve efeito (P>0,05) dos níveis de inclusão do RBD no consumo de ração das aves (Tabela 6). Esses resultados são compatíveis com o estudo feito por Nunes et al (2008), que utilizaram 0, 20, 40 e 60% de farinha de batata-doce em rações de frangos de corte Cobb na fase inicial, não encontrando efeito no consumo.…”

Section: Resultsunclassified

Características nutricionais e utilização do resíduo de batata-doce em dietas de frangos de crescimento lento

Parente

Rodrigues

Vaz

et al. 2014

Rev. bras. saúde prod. anim.

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Foram realizados três experimentos, para determinar o valor energético e nutricional do resíduo da produção de etanol a partir da batata-doce (RBD) e a sua utilização em dietas para frangos de crescimento lento. No primeiro experimento foi realizado um ensaio metabólico a fim de determinar a energia metabolizável aparente (EMA) e a corrigida para o balanço de nitrogênio (EMAn), bem como os coeficientes de metabolizabilidade aparente do resíduo, utilizando o método de coleta total de excretas, num delineamento inteiramente casualizado, com dois tratamentos: ração referência e ração teste (70% ração referência + 30% de inclusão do resíduo da batata-doce), quatro repetições e dez frangos de crescimento lento por unidade experimental. O RBD apresentou: 24,64% de proteína bruta, 2732kcal/kg e 2547kcal/kg EMA e EMAn na matéria natural. Os demais experimentos foram realizados para avaliar níveis de inclusão (0%, 6%, 12% e 18%) do RBD em dietas de aves de crescimento lento, em um delineamento inteiramente casualizado, com quatro tratamentos e cinco repetições e 10 aves por unidade experimental, avaliando o desempenho e metabolismo das rações. Os níveis de inclusão não afetaram o consumo de ração, mas houve redução no ganho de peso (GP) e piora na conversão alimentar (CA). Os coeficientes de metabolizabilidade do nitrogênio e matéria mineral apresentaram efeito quadrático com pontos máximos de 6,38% e 5,17% respectivamente. O RBD pode ser incluído nas rações de aves de crescimento lento até o nível de 1,041%.

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Section: Resultsunclassified

Características nutricionais e utilização do resíduo de batata-doce em dietas de frangos de crescimento lento

Parente

Rodrigues

Vaz

et al. 2014

Rev. bras. saúde prod. anim.

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“…This may explain the increased feed intake when a higher amount of enzyme was added. When chicks hatch, they undergo a metabolic and physiological transition due to the switch from yolk sac feeding to exogenous feeding [19][20][21].…”

Section: Discussionmentioning

confidence: 99%

Effects of the Addition of Trichoderma reesei Cellulase to Broiler Chicken Diets for a 21-Day Period

Perim,

da Silva,

de Souza

et al. 2024

Animals

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The cellulose present in the cell wall of vegetables prevents the greater release of nutrients to the animal. Therefore, the use of the cellulase enzyme is a viable strategy as it is capable of breaking cellulose bonds, releasing nutrients such as glucose, increasing dietary energy, and thus improving the productive performance of birds. Trichoderma reesei is efficient in the production of cellulase, which is produced via submerged fermentation followed by purification, formulation, and drying. Therefore, an experiment was carried out using 240 male broilers of the Cobb-500® lineage to verify the effects resulting from the addition of powdered (500 g/t and 1000 g/t) and liquid (500 mL/t) cellulase over a period of 1 to 21 days. A completely randomized experimental design was used, consisting of four treatments with six replications and ten birds per replication that were housed in an experimental cage. It was observed that performance and digestibility results were significantly different with cellulase supplementation. Also, the relative weight of the large intestine in the period between one and seven days increased when cellulase was added at 1000 g/t. In the period of between eight and 14 days of life, the birds that consumed only the basal diet obtained higher levels of liver protein than those that received the treatments with the addition of the enzyme. However, 15 and 21 days, the consumed feed effect did not occur between thus, it is not conclusive whether hepatotoxicity occurs with the addition of cellulase. For the blood parameters, at 21 days, the diets with added cellulase were not significantly different regarding electrolytes. It was concluded that this cellulase produced by Trichoderma reesei can be included in the animals’ diet.

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“…However, birds that were not fed the enzymes presented higher large intestine and lower esophagus + crop relative weights, respectively, as well as 10% heavier livers compared with those fed the enzymes. Evaluating diets with sweet potato flour in partial substitution for corn and with the inclusion or not of an enzyme complex (amylase, phytase, protease, xylanase, β-glucanase, cellulase and pectinase), Nunes et al (2011) did not find any differences in the intestinal biometry of 28-d-old broilers. Nascimento (2011) evaluated the effect of an enzyme complex supplement, consisting of phytase and carbohydrolases, and dietary sodium levels on the intestinal morphometrics of 18-d-old male Cobb chickens, and did not very any effect of enzyme addition on stomach relative weight, small intestine relative weight and length, or large intestine and liver relative weights.…”

Section: Biometry Of the Digestive Organsmentioning

confidence: 99%

Addition of Amylase from Aspergillus Awamori to the Diet of Broiler Chickens

Morgado

Cysneiros²,

Sousa

et al. 2016

Rev. Bras. Cienc. Avic.

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Two experiments were performed to evaluate the hematological and blood biochemistry parameters, biometry of digestive organs, enzyme activities, protein content and absolute weight of the pancreas of broilers fed pre-starter and pre-starter diets supplemented or not with amylase from Aspergillus awamori. In total, 120 male Cobb chicks were housed in heated cages in each experiment. A completely randomized experimental design, with two treatments (feed with and without amylase) and six replicates per treatment of 10 birds each was applied. The data were subjected to analysis of variance using the F-test at 5% probability level. The dietary amylase addition did not affect hematological and blood biochemistry parameters and the biometry of the gastrointestinal tract of 7-and 21-d-old broilers, nor the absolute weight, enzyme activities or protein concentration of the pancreas of 7-d-old broilers. However, the inclusion of amylase in the diet reduced amylase activity and pancreatic protein concentration in 21-d-old broilers. The application of amylase to broiler chicken pre-starter and starter feeds is not justified given the pancreatic amylase activity and protein concentrations.

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Desenvolvimento do sistema digestório de frangos de corte alimentados com farinha de batata doce

Cited by 5 publications

References 8 publications

Características nutricionais e utilização do resíduo de batata-doce em dietas de frangos de crescimento lento

Características nutricionais e utilização do resíduo de batata-doce em dietas de frangos de crescimento lento

Effects of the Addition of Trichoderma reesei Cellulase to Broiler Chicken Diets for a 21-Day Period

Addition of Amylase from Aspergillus Awamori to the Diet of Broiler Chickens

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