Dry residue of cassava as a supplementation in broiler feed with or without addition of carbohydrases

Abstract

The objective of this study was to evaluate the inclusion of dry residue of cassava (DRC) with or without supplementation of carbohydrases on performance, carcass yield, cuts and organs, blood parameters and meat quality of broiler chickens. Birds were distributed in a completely randomised design in a 2 x 5 factorial scheme, with or without addition of carbohydrases and five levels of DRC inclusion, resulting in 10 treatments with 5 replicates of 22 birds each. At 21 days of age, two birds of each treatment were fasted for 6 hours for blood brachial puncture. At 42 days, four birds per pen were slaughtered to determine carcass yield, cuts, organs, percentage of abdominal fat and meat quality. Between 1-21 days of age, there was an interaction (P < 0.05) between carbohydrase and DRC supplementation on weight gain (WG) and feed intake, which showed a decreasing linear effect without the inclusion of carbohydrases. In the period from 1 to 42 days, there was an interaction (P < 0.05) between carbohydrase supplementation and DRC inclusion on the variables WG and feed conversion. Carbohydrase inclusion provided an increase (P < 0.05) in the concentrations of cholesterol, triglycerides, creatinine, gamma GT and blood glucose. Concentrations of gamma GT were increased and levels of alanine aminotransferase and creatinine were decreased (P < 0.05) with DRC inclusion. At 24 hours post mortem, there was a significant interaction (P < 0.05) for breast meat between carbohydrase supplementation and DRC inclusion for the variable L. The analysed values of pH, water holding capacity and shear force of the breast meat were not affected (P > 0.05) by DRC inclusion and carbohydrase addition. However, cooking loss was influenced (P < 0.05) by levels of inclusion of DRC. The L and a* variable and the feet of broiler chickens were not affected (P > 0.05) by DRC levels and carbohydrase addition. The colour variable b* showed a decrease (P < 0.05) from 5% level of inclusion. The results of this study show that DRC can be used in the diets of broiler chickens from 1 to 21 days old to the assessed level of 10%, provided that carbohydrase is added.

Biometria dos órgãos linfoides e composição físico- química da carne de frangos de crescimento lento alimentados com bagaço de mandioca e complexo enzimático / Biometry of lymphoid organs and physical-chemical composition of meat of slow growth chickens fed with cassava bagasse and enzymatic complexes

“…abdo (%) Os resultados da gordura abdominal contrastam aos obtidos por Ribeiro et al (2006), que verificaram redução no seu percentual com o aumento do farelo integral da mandioca (0, 15, 30 e 45%) na dieta de frango caipira aos 84 dias. Carrijo et al (2010) e Broch et al (2017), da mesma maneira, observaram redução na gordura abdominal de frangos caipira e frangos da linhagem coob 500, respectivamente, alimentados com coprodutos da mandioca.…”

“…Resultado semelhante foi verificado por Souza et al (2011), com modificações na coloração da carcaça e das peles do peito de aves caipiras, variando do amarelo vivo para o branco, à medida que os níveis de substituição do milho pelo resíduo da industrialização da mandioca vão sendo incrementados, similarmente, Broch et al (2017), observaram diminuição dos valores de b* (P <0,05) para frangos de corte alimentados com resíduo da fecularia quando comparado ao tratamento controle, diferindo dos observados por Amorim et al (2015), que não encontraram efeito sobre os valores de colorimétrica da carne do peito.…”

Dried Cassava Residue in Laying Quail Feeding

“…The addition of alternative fibrous feedstuffs in poultry diets can compromise animal performance due to antinutritional factors. DCR has high levels of non-starch polysaccharides that cannot be digested by birds, because their binding is resistant to hydrolysis in the gastrointestinal tract (Broch et al, 2017) making it difficult to use successfully in poultry diets (Morgan & Choct, 2016). Nevertheless, according to Duarte et al (2013), quails might be able to make better use of fibrous feedstuffs when compared to broilers due to the morphophysiological characteristics of their gastrointestinal tract, enabling quails to have a more efficient digestibility.…”

Effect of Cassava Residue Substituting for Crushed Maize on In Vitro Ruminal Fermentation Characteristics of Dairy Cows at Mid-Lactation

“…Unused cassava residue usually rots, pollutes the environment and endangers the health of both human and animals [3]. Research has shown that cassava residue has 74.4% of nitrogen-free extract content, 3519 Kcal/kg crude energy [4] and it is rich in amino acids and minerals such as copper, potassium, manganese and iron [5]. In addition, cassava residue is much cheaper compared with common feedstuffs like crushed maize, so that it is an unconventional feedstuff with great utility value for livestock.…”