Effects of β-mannanase in corn-soy diets on commercial leghorns in second-cycle hens

Abstract

beta-Mannanase (Hemicell) is a unique enzyme-based feed ingredient that can hydrolyze beta-mannan, an antinutritional fiber in feed. Because soybean meal contains beta-mannan and its derivatives, addition of beta-mannanase may improve soybean-meal utilization. The purpose of this study was to evaluate the effect of beta-mannanase on performance of commercial Leghorns fed corn-soybean meal based diets. In this experiment, 3 diets were formulated. The metabolizable energy content for diet 1 (high-energy diet) was 2,951 kcal/kg, which was 120 kcal/kg higher than diet 2 (low-energy diet supplemented with beta-mannanase) and diet 3 (low-energy diet without beta-mannanase). Hy-Line W-36 hens (n = 720, 98 wk old) were randomly divided into 3 dietary treatments (16 replicates of 15 hens per treatment). The trial lasted for 12 wk. Overall average feed conversion of hens fed the low-energy diet supplemented with beta-mannanase was similar to that of hens fed the high-energy diet, and both were significantly lower than that of hens fed the low-energy diet without beta-mannanase. There were no significant differences in overall average egg production and egg mass among 3 dietary treatments for the 12-wk period. However, the addition of beta-mannanase significantly increased average egg production and egg mass of hens fed the low-energy diet from wk 5 to 8. There were no significant differences in feed intake, egg specific gravity, egg weight, mortality, body weight, and body weight variability among the 3 dietary treatments. beta-Mannanase supplementation improved energy utilization of corn-soybean layer diets and has potential to reduce the cost of practical laying hen diets containing beta-mannan.

Effects of supplementation of multi-enzyme and multi-species probiotic on production performance, egg quality, cholesterol level and immune system in laying hens

“…Such improving feed conversion as result of enzyme supplementation in the diet was caused significant increase of egg production and at the same time the insignificant differences in feed consumption among treatments. These results are supported with the finding of Wu et al (2005), who supplemented diets with enzyme and reported that despite an increase in egg production, feed intake did not change (p !0.05). Mandal et al (2000) in their study with broilers showed that probiotics as alternating antibiotics in the diets of these birds resulted in improved feed conversion ratio (FCR) and body weight gain.…”

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

“…The significant effect of Hemicell on immunity of broilers may be explained by the findings of Wu et al (2005) who reported that substrate of Hemicell entering the intestinal tract resulted in a reduction of the β-mannan content associated with a reduction of innate immune stimulation. An important mode of action is a reduction in innate immune stimulation associated with a reduction in the β-mannan content of substrate entering the intestinal tract.…”

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

“…But the PKM also contains 35 40% mannans, which is poorly digestible by poultry (Sundu et al, 2006). Therefore, supplementation of its respective enzyme, mannanase has been recommended (Wu et al, 2005;Sundu et al, 2006). In addition, several poultry studies (Sundu et al, 2006;Chong et al, 2008;Zanu et al, 2012) showed that the appropriate level of PKM inclusion had encouraged the feed intake in laying hens.…”