<b>Influence of xylanase and vitamin A in wheat-based diet on performance, nutrients digestibility, small intestinal morphology and digesta viscosity in broiler chickens

Abstract

ABSTRACT. The effect of wheat-based diet (WBD), supplemented with xylanase and surplus vitamin A, on performance, nutrient digestibility, intestinal morphology and digesta viscosity of broiler chickens was investigated. Based on a completely randomized design, 240-day-old chickens were randomly divided into six experimental diets and four replications with 10 chickens each. Experimental diets consisted of corn-based diet (CBD) (T1), WBD with routine amounts of vitamin A (9000 IU kg xylanase (T6). For Feed Conversion Rate (FCR) between day 1 and 21 and between day 21 and 42 WBD supplemented with vitamin A and enzyme was less than CBD (p < 0.05). Also, supplementation of surplus vitamin A singly, and vitamin A and enzyme improved digestibility of crude protein (CPD) and crude fat (CFD) than WBD with routine amounts of vitamin A (p < 0.05). The villus (duodenum, jejunum and ileum) was longer (p < 0.05) in broilers fed on diet supplemented with vitamin A and enzyme than those with CBD. It may be concluded that enzyme and vitamin A supplementation to WBD may improve mentioned parameters.Keywords: digestibility, enzyme, morphology, viscosity, vitamin A, wheat.Os efeitos de xilanase e vitamina A em dieta baseada no trigo (DBT) sobre o desempenho, digestibilidade de nutrientes, morfologia do intestine delgado e viscosidade da digesta em frangos de corte RESUMO. Investigou-se o efeito de dieta baseada no trigo (DBT) e suplementada com xilanase e vitamina A sobre o desempenho, digestibilidade dos nutrientes, morfologia intestinal e viscosidade digesta de frangos de corte. Baseado num esquema aleatório, frangos de 240 dias foram divididos em grupos de seis dietas experimentais, com quatro repetições, com 10 frangos cada. As dietas foram: T1 = dieta baseada em trigo; T2 com DBT com vitamina A (9000 IU kg xylanase. Para a Taxa de Conversão de Dieta entre dia 1 e 21 e entre dia 21 e 42 DBT suplementada com vitamina A e enzima foi menor do que DBM (p < 0,05). Suplementacão sozinha de vitamina A e vitamina A + enzima melhoru a digestibilidade de proteina bruta (DPB) e gordura bruta (DGB) do que DBT com a quantidade rotineira de vitamina A (p < 0,05). As vilosidades (duodeno, jejuno e íleo) eram mais compridas (p < 0,05) em frangos de corte alimentados com dieta suplementada com vitamina A e enzima do que os frangos alimentados com DBM. Conclui-se que a suplementação de DBT pela enzima e vitamina A poderá melhorar os parâmetros acima.

Effects of feed form and xylanase supplementation on performance and ileal nutrients digestibility of heat-stressed broilers fed wheat–soybean diet

“…Relative length (cm/100 g BW) the current study also indicated that xylanase supplementation improved ileal digestibility of CP and Ca, and AME of feed. Positive effects of xylanase on nutrient digestibility have been reported by other authors (Esmaeilipour et al 2011;Khoramabadi et al 2014). The NSPs in the cell walls of cereals encapsulate starch and protein and also increase the viscosity of digesta (Abdollahi et al 2011).…”

Interactions between lipid source and vitamin A on broiler performance, blood parameters, fat and protein deposition rate, and bone development

“…Low levels of vitamin A (1,000 IU kg −1 ) showed the best results, differing from the results found in this study for broilers at 21 d of age. Khoramabadi et al. (2014) , evaluating wheat-based diets with different vitamin A supplementation with or without xylanase inclusion, found no effect of treatment on the FI of birds at 21 d of age.…”

Black soldier fly defatted meal as a dietary protein source for broiler chickens: Effects on growth performance, blood traits, gut morphology and histological features

“…Therefore, the need for alternative protein sources for livestock is becoming increasingly urgent [ 2 ]. Finding alternative sources of poultry feedstuffs is a recent research topic that is still under investigation by nutrition researchers in an attempt to find a balance between high performance and low cost [ 3 ]. Makkar et al [ 4 ] mentioned that insects are good candidates to face the global challenge of finding new protein sources at a low cost, especially when taking into account their nutritional value and low breeding space requirements.…”

<b>Immune response, blood parameters and growth performance in broiler fed reduced protein diet supplemented with β-hydroxy-β-methyl butyrate and conjugated linoleic acid

“…Efficient use of nutrients in order to maximize production of poultry meat is one of the most important goals of poultry nutrition science (Khoramabadi, Akbari, Khajali, Noorani, & Rahmatnejad, 2014). Supplementation should avoid the excess of nutrients in the formulated diets and consequently, the unnecessary expenses with nutrition.…”

<b>Evaluation of biochemical parameters and productive performance of japanese quail in response to the replacement of soybean meal with canola meal

“…Researchers have been concerned over the recent years to find out solutions for poultry feeding which to support high performance and lead to lower feeding costs (Khoramabadi, Akbari, Khajali, Noorani, & Rahmatnejad, 2014). Soybean meal is the main source of plant protein which used in poultry feeding by the high protein level and suitable amino acid balanced in particularly the highest lysine digestibility (91%) (Kerley & Allee, 2003).…”