Effect of β-Mannanase (Hemicell) on Growth Performance and Immunity of Broilers

Abstract

Two hundred four broilers (1-d-old) were randomly allocated to 4 treatments, each of which had 3 pens of 17 chicks per pen and were used to investigate the effects of beta-mannanase (Hemicell) on growth performance and immunity. The chicks received the same basal diet based on corn-soybean meal and Hemicell was added to the basal diet at 0, 0.025, 0.05, and 0.075%, respectively. Weight of each replicate was determined at wk 0, 3, and 6 of age. There were no significant differences in average feed intake in the 0- to 3-wk and 0- to 6-wk periods, and no differences in serum IgA, or IgG concentrations. However, the addition of Hemicell significantly increased (P < 0.05) weight gain in the 4- to 6-wk and 0- to 6-wk periods. Feed conversion for the 0.025 and 0.05% groups was significantly greater (P < 0.05) than for the control group in the 4- to 6-wk and 0- to 6-wk periods. Hemicell significantly increased (P < 0.05) the serum IgM concentration in 3- and 6-wk-old broilers. Proliferation of T lymphocytes in 6-wk-old broilers for the 0.05% group was also improved (P < 0.05) significantly. The results indicate that Hemicell may improve growth performance and immunity of broilers.

β-mannanase and mannan oligosaccharides in broiler chicken feed

“…The better performance may be associated with the stimulus to the intestinal mucosa provided by the enzyme, since it reduces intestinal viscosity, allowing for higher nutrient absorption, consequently favoring higher weight gain. These results corroborate those obtained by ZOU et al (2006) and ALBINO et al (2006), CARAMORI JR et al (2008) and GODOI et al (2008), who tested antibiotics and MOS-based prebiotics in broiler diets and saw an improvement in the broilers' weight gain. On the other hand, ESONU et al (2004), while assessing diets with and without added cellulase enzyme, did not see an improvement in the birds' fi nal weight or feed conversion ratio.…”

“…Similar results were obtained by ZOU et al (2006) andOPALINSKI et al (2010) while feeding broilers with diets with and without β-mannanase over the period of 1 and 21 days of age.…”

Effect of Dietary β-Mannanase Supplementation and Palm Kernel Meal Inclusion on Laying Performance and Egg Quality in 73 Weeks Old Hens

“…The mannanase did not induce any influence on humoral immune response of old aged hen in this study, which is similar to the result of other poultry studies (Li et al, 2010;Zou et al, 2006). However, Zou et al (2006) reported an increase of serum IgM by dietary mannanase supplementation. Therefore, the contradictory result could be attributed to either type of immunoglobulin or type of supplemental mannanase.…”

“…Therefore, the immune response was stimulated by anti-oxidative diet such as omega-3 fatty acid in old aged laying hen (Ebeid, 2011). The mannanase did not induce any influence on humoral immune response of old aged hen in this study, which is similar to the result of other poultry studies (Li et al, 2010;Zou et al, 2006). However, Zou et al (2006) reported an increase of serum IgM by dietary mannanase supplementation.…”

Sustitución de la harina de soja con mezcla hojas de yuca:harina de sangre, en dietas de pollos con o sin sumplementación de enzimas

“…Lesson et al (1996); Augelovicova and Michalik (1997) on the other hand reported increases in feed intake as a result of enzyme supplementation due to increased nutrient digestibility. The improved feed conversion due to enzyme supplementation in the present study is in agreement with earlier findings (Wang et al, 1997;Huazhong et al, 1999;Jackson et al, 2004;Rahman et al, 2005;Zou et al, 2006;Onu et al, 2011). These researchers reported that exogenous enzymes greatly improved the feed conversion ratio of broiler chicks fed enzyme supplemented diet.…”