An evaluation of endo-β-D-mannanase (Hemicell) effects on broiler performance and energy use in diets varying in β-mannan content

Abstract

Two experiments were conducted to evaluate the effects of a commercial endo-beta-D-mannanase (Hemicell) on overall performance, MEn, net energy for gain, and some serum parameters of broilers fed diets varying in beta-mannan level (experiment 1) and to evaluate effects of enzyme level on the same variables in broilers fed diet high in beta-mannan (experiment 2). As a semipurified beta-mannan source, guar gum was used to alter the dietary beta-mannan level. In experiment 1, guar gum was added at 0, 0.5, 1, and 2% in a corn-soy-based starter diet with (0.05%) and without endo-beta-D-mannanase supplementation in a 4 x 2 factorial design. Enzyme supplementation improved (P < 0.01) feed efficiency at control and each guar gum inclusion level, whereas 2% guar gum supplementation reduced (P < 0.01) BW and increased (P < 0.01) 14-d feed:gain ratio. Enzyme supplementation also increased dietary MEn and net energy gain. In experiment 2, endo-beta-D-mannanase was added at 0, 0.5, 1, and 1.5% in a corn-soy-based starter diet containing 1% guar gum. Increasing endo-beta-D-mannanase supplementation did not affect (P > 0.10) final BW but improved 14-d feed:gain ratio at all inclusion levels. As in the first experiment, ME improved (P < 0.05) with increasing enzyme inclusion. Dietary endo-beta-D-mannanase inclusion significantly reduced water:feed ratio and total dry fecal output (P < 0.01). Taken together, the results of these 2 experiments indicate that endo-beta-D-mannanase supplementation may improve the utilization of nutrients in diets containing beta-mannan.

Effect of fungal fermentation on the nutrient digestibility of guar meal in Penaeus vannamei

“…The untreated GRM used in the present study had 10.99% of guar gum and its quantity did not significantly reduce even after fungal fermentation (10.17%). Daskiran et al (2004) reported that the usage of fibrolytic enzymes alleviated the deleterious effect of guar gum by increasing intestinal viscosity of animals. A. niger would have produced these enzymes during fermentation as earlier reported by Solis-Pereyra et al (1996), Maciel et al (2008) and Reddy et al (2015).…”

Effects of Emulsifier and Multi-enzyme in Different Energy Densitydiet on Growth Performance, Blood Profiles, and Relative Organ Weight in Broiler Chickens

“…Whereas Jackson et al (2003Jackson et al ( , 2004 and Daskiran et al (2004) reported beneficial effects on BWG and FCR during starter and grower phases of growth from 80 or 110 unit/g β-mannanase supplementation. Similarly, Kidd et al (2001) fed broilers corn and soybean meal based diets with or without anα-galactosidase (112 g/ton) enzyme.…”

Effects of Dietary Inclusion of Guar Meal Supplemented by &beta;-Mannanase on Performance of Laying Hens, Egg Quality Characteristics and Diacritical Counts of White Blood Cells

“…Lee et al (2005) reported that Hemicell significantly reduced the FCR of guar germ diets to a level comparable with the positive and negative control diets. Daskiran et al (2004) added Hemicell at 0.5, 1 and 1.5% in a corn-soybased starter diet containing 1% GM and found that Hemicell improved FCR at all inclusion levels.…”