The effect of a β-mannanase-based enzyme on growth performance and humoral immune response of broiler chickens fed diets containing graded levels of whole dates

Abstract

The use of low-quality whole dates in broilers' diets was evaluated. The apparent metabolizable energy (AMEn) of whole dates and date pits was determined with or without a beta-mannanase-based enzyme (Hemicell--a registered trademark of ChemGen Corp., Gaithersburg, MD. Dried Bacillus lentus fermentation solubles with 158 million units/kg minimum enzyme activity. Recommended usage rate is 0.4 g kg(-1) of feed. ChemGen Corp., Gaithersburg, MD, USA). A 3 x 2 factorial arrangement consisting of whole dates (0, 175, and 350 g kg(-1)) and enzyme (0 or 0.4 g kg(-1)) was performed to assess the effect of the enzyme on the nutritive value of whole dates (experiment 2) in broilers' diet. Enzyme improved AMEn contents of the whole dates and date pits. The diets containing 175 or 350 g kg(-1) whole dates produced body weight gain (BWG) similar to those obtained without dates. Enzyme improved BWG and feed conversion ratio throughout the experimental period. In conclusion, whole dates can be included in broiler diets at levels up to 350 g kg(-1). In addition, beta-mannanase supplementation would have beneficial effects on performance and immunity in birds fed on corn-soy or corn-soy-whole dates diets.

The Protective Role of Date Palm (Phoenix Dactylifera Seeds) against Aflatoxicosis in Broiler Chickens Regarding Carcass Characterstics, Hepatic and Renal Biochemical Function Tests and Histopathology.

“…Fan et al (2015) stated that no significant differences were observed for the weights of organs (heart, liver, spleen, BF and thymus) among all treatments in broilers fed mixed AFB1, B2, G1, G2 from 7 to 42 days of age. Moreover, on DPS supplementation, Zangiabadi and Torki (2010) reported that adding complete waste of 30% dates only significantly affected the relative gizzard weight but had no significant effect on the other body parts.…”

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

“…Modification NRC nutrient recommendations (Maroufyan et al, 2010;Fanooci and Torki, 2010), using feed additives like enzymes (Zangiabadi and Torki, 2010), organic acids (Mahdavi and Torki, 2009) or medicinal plants (Ghasemi et al, 2010;Najafi and Torki, 2010) has been reported by other researchers. A patented enzyme product (β-mannanase, Hemicell) has been shown to improve feed conversion in cornsoybean diets fed to layers (Zangiabadi and Torki, 2009).…”

“…The mechanism of β-mannanase is to degrade β-mannan, which is an antinutritional factor existing in many legumes, including soybean and canola meals. Dietary inclusion of Hemicell has improved broiler performance of broilers fed corn-soybean meal-or corn-soybean meal-palm date-included diets (Zangiabadi and Torki, 2010).…”

Evaluating the nutritional value of date pits and demonstrating their application in laying hen diets

“…Similarly, El-Sheikh, Al-Shokiry, Salama, and Khidr (2013) reported that BWG of layers was not affected by the dietary inclusion of date meal up to 40% of the whole diet. In another study, Zangiabadi and Torki (2010) observed that diet containing 35% whole dates produced BWG similar to those broilers obtained without dates. It has been also reported that dietary inclusion of 10% DP meal (Hermes & Al-Homidan, 2004) and 15% DP (Najib & Al-Yousif, 2012) can improve productive performance, henday production, egg weight, egg mass and FCR compared to control groups.…”