Effects of β-mannanase-based enzyme in corn-soy and corn-soy-canola diets on broiler performance

Abstract

A 2) 2 factorial experiment was conducted to evaluate the effects of dietary partial replacement of soybean meal (SBM) by canola meal (CM) with and without a b-mannanase-based enzyme on growth performance of broilers. A total number of 360 one-day-old broiler chicks were weighed and allocated to four iso-caloric and iso-nitrogenous diets, each of which had 9 pens of 10 chicks with the same number of both sexes. Starter, grower and finisher diets were offered to birds from 0 to 21 day, 22 to 42 day and 43 to 49 day of age, respectively. All experimental data were subjected to the general linear model procedure of SAS as a complete randomised design. Dietary partial replacement of SBM by CM decreased body weight (BW) of broilers on days 21, 42 and 49 of age. Dietary CM inclusion decreased and increased feed intake (FI) of broilers during starting and finishing periods, respectively. Broilers fed corn-SBM diet shown improved feed conversion ratio (FCR) in comparing to those fed corn-CM diet during all rearing periods. Dietary enzyme supplementation improved BW of birds on 21, 42 and 49 days of age. Dietary b-mannanase supplementation improved feed conversion ratio feed conversion ratio (FCR) during growing as well as whole periods; but FI of birds was not affected by enzyme. Dietary inclusion of CM increased the relative weights of gizzard, liver, pancreas, fat pad, duodenum, jejunum and ileum; however, the relative length of digestive tracts was increased in CM-included dietary group. The relative weights of gizzard, fat pad, liver, pancreas and digestive tracts were not affected by dietary enzyme supplementation. Litter pH on week 7 was higher in corn-SBM in comparing to corn-SBM-CM dietary group. In conclusion, broilers fed CM-included diets did not achieve similar performance compared to corn-SBM control group. Dietary b-mannanase supplementation improved performance of broilers fed corn-SBM-and/or corn-SBM-CM-based diets.

Feeding marbled spinefoot rabbitfish (Siganus rivulatus) juveniles with β‐mannanase enzyme: An effective tool to enhance growth and immunity and induce low salinity tolerance

“…In addition, this result is in agreement with previous studies on poultry (Chegeni, Torki, & Kamyab, 2011; Cho & Kim, 2013; Li, Chen, Chen, Li, & Cao, 2010) and pigs (Pettey, Carter, Senne, & Shriver, 2002). The authors attributed these results to the dietary supplementation of ß‐mannanase that decreased viscosity and improved nutrient utilization in ß‐mannans‐containing diets (Daskiran et al, 2004; Lee, Bailey, & Cartwright, 2003).…”

Effect of feeding Aspergillus awamori and canola seed on the growth performance and muscle fatty acid profile in broiler chicken

“…Recently, Chegeni et al . () reported that growth performance of broiler chickens fed canola seed was improved in cases of supplement with β‐mannanase, which belongs to the hemicellulases and functions in degrading NSP. Since A. awamori was known to produce β‐mannanase (Kurakake & Komaki ), it was hypothesized that feeding of A. awamori and canola seed have positive effects on growth performance of broiler chickens.…”

“…However, utilization of canola seeds as feed ingredients is often limited because of its high content of non-starch polysaccharides (NSP) (Meng et al 2005), while broiler chickens fed a diet with canola seed showed higher feed efficiency compared with chickens fed a control diet (Talebali & Farzinpour 2005). Recently, Chegeni et al (2011) reported that growth performance of broiler chickens fed canola seed was improved in cases of supplement with β-mannanase, which belongs to the hemicellulases and functions in degrading NSP. Since A. awamori was known to produce β-mannanase (Kurakake & Komaki 2001), it was hypothesized that feeding of A. awamori and canola seed have positive effects on growth performance of broiler chickens.…”