scholarly journals Performance and carcass characteristics of free-range broiler chickens fed diets containing alternative feedstuffs

2011 ◽  
Vol 13 (3) ◽  
pp. 211-216 ◽  
Author(s):  
PB Faria ◽  
JO Vieira ◽  
JN Silva ◽  
AQ Rodrigues ◽  
XR Souza ◽  
...  
Nativa ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 232
Author(s):  
Antonia Mariana Do Nascimento ◽  
Fábio Augusto Gomes ◽  
Henrique Jorge De Freitas ◽  
Gilcineide Araújo Pires ◽  
Suelen Ferreira Da Costa Rodrigues ◽  
...  

O objetivo deste estudo foi avaliar os efeitos da suplementação de um complexo enzimático em dietas contendo torta de cupuaçu (TSC) sobre o desempenho, rendimento de carcaça e viabilidade econômica de frangos de corte de linhagem caipira. Foram utilizados 300 frangos da linhagem caipira “pescoço pelado” em delineamento experimental inteiramente casualizado com 6 tratamentos e 5 repetições. Os tratamentos, em arranjo fatorial 3x2, eram constituídos por três níveis de inclusão de TSC (0, 5, 10 %) e dois níveis de enzimas (sem ou com). As enzimas foram fornecidas com a inclusão de 200 g/t de um complexo de xilanase (12.000 u/g) e β-glucanase (2.500 u/g) e 50 g/t de fitase (5.000 FTU/g). Não houve diferença entre os tratamentos no consumo de ração e viabilidade. O ganho de peso diminuiu com o aumento do nível de TSC na dieta, piorando a conversão alimentar. O uso do complexo enzimático não influenciou as variáveis analisadas. O rendimento de carcaça não foi influenciado pela inclusão de TSC e complexo enzimático, porém houve diminuição da gordura abdominal e aumento da moela e intestino com o aumento da inclusão de TSC na dieta. A inclusão de TSC e complexo enzimático na dieta diminuiu a margem bruta relativa (MBR). Portanto, a inclusão de TSC afetou negativamente nas características produtivas das aves, enquanto as enzimas exógenas avaliadas não foram efetivas em compensar os efeitos deletérios da TSC no desempenho e retorno econômico.Palavras-chave: alimentos alternativos, desempenho, enzimas, nutrição animal, rendimento de carcaça. ENZYMATIC COMPLEX IN FREE-RANGE BROILER DIETS WITH INCLUSION OFCUPUAÇU (Theobroma grandiflorum) SEED CAKE ABSTRACT: The purpose of this study was to evaluate with the effects of an enzyme complex supplementation in diets containing cupuaçu seed cake (CSC) on the performance, carcass yield and economic viability of free-range broilers. Three hundred broiler chickens of the ‘Pescoço Pelado’ free-range line were used in a completely randomized experimental design with 6 treatments and 5 replicates. Treatments, in a 3x2 factorial design, consisted of three dietary levels of CSC (0, 5, and 10%) and two enzyme levels (without or with). The enzymes were provided by the inclusion of 200 g/t of a xylanase (12000 u/g) and β-glucanase (2,500 u/g) complex, and by 50 g/t phytase (5000 FTU /g). There was no difference on feed intake and viability. The weight gain decreased as the dietary CSM level increased, worsening feed conversion. The enzyme complex did not affected the analyzed variables. The carcass yield was not affected by the inclusion of CSC and enzyme complex, but decreased abdominal fat, and increased gizzard and intestine with dietary CSC levels increasing. The inclusion of CSC and enzyme complex in the diet reduced the relative gross margin (RGM). Therefore, the inclusion of CSC negatively affected the productive characteristics of free-range broilers, while the enzymes were not effective in compensate the CSC side effects on performance and return.Keywords: alternative feedstuffs, animal nutrition, carcass yield, enzymes, performance.


2021 ◽  
Author(s):  
Navid Naderi Boroojerdi ◽  
Mostafa Rajabzadeh

Abstract An experiment was conducted on 240 one-day old male (Ross308) chicken to the effect of substitution of dried mealworm (Tenebrio molitor) with soybean meal on growth performance and carcass characteristics broiler chicks. Chicks fed in a completely randomized design with 4 replicate cages (12 birds per cage). Five dietary treatments used: 1- Control treatment: Basal diet based on corn-soybean meal without adding dried mealworm, 2- Replacement of 5% dried mealworm with soybean meal in the base diet, 3- Replacement of 10% dried mealworm with soybean meal in the base diet, 4- Replacement of 15% dried mealworm with soybean meal in the base diet and 5- Replacement of 20% dried mealworm with soybean meal in the base diet. The results of the experiment showed that 3rd and 4th treatments with a substitution of 10 and 15 percent showed a higher mean weight gain and a daily gain, but their feed intake was lower comparing other treatments, and finally, the feed conversion ratio showed a significant decrease with respect to control treatment using these replacement levels. At 21 and 42 days of age, carcass yield and relative weight of the breasts showed significant increases in treatments 3 and 4, and other characteristics of chicken carcasses were not affected by the test treatments. The experiment showed that replacing soybean meal with 10% and 15% worm powder significantly improved the performance of broiler chickens, but no significant difference was found between the two levels.


2020 ◽  
Vol 49 ◽  
Author(s):  
Fábio Loures Cruz ◽  
Diogo Alvarenga Miranda ◽  
Joanna Oliveira Marçal ◽  
Allan Alves Fernandes ◽  
Marcos Aurélio Lopes ◽  
...  

Author(s):  
Elaine Cristina de Oliveira sans ◽  
Fabiano Dahlke ◽  
Juliana Freitas Federici ◽  
Frank Andre Maurice Tuyttens ◽  
Carla Forte Maiolino Molento

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