Abstract
This study was designed to evaluate the effects of dietary prebiotic (mannan oligosaccharide = MOS) and probiotic (Saccharomyces cerevisiae = SC) in finishing turkey diets on carcass, cut yield, meat composition and colour. A total of 72 ten-weeks-old Big6 male turkey poults were used in the trial. There were eight replicate floor pens per floor with three birds in each. The experiment lasted up to 20 wks of age. The trial was set up as a completely randomized design with 3 dietary treatments. The treatments were: i) negative control (C, no additive); ii) MOS 1 g per kg of diet and iii) SC 1 g per kg of diet (strain SC47, 300×10 10 CFU/kg). Body weight (BW) and feed intake were determined for each of the two week intervals. Twenty-four birds were slaughtered and eviscerated to determine carcass, carcass parts and internal organ weights at 20 wks of age. Meat colour and pH levels were measured 24 h after slaughter. The dietary treatments did not affect BW and average daily gain during the trial (p>0.05). The average daily feed intake and feed conversion ratio of turkey toms fed with MOS were higher than those of control and SC groups during the overall period (p 0.05). These results suggest that the addition of MOS and SC is not likely to produce any performance or carcass characteristics in finishing turkeys at 10 to 20 wks of age.
Highlights
The ban against using antibiotics as feed additives in poultry diets of many countries has led to an increase in research regarding alternative feed additives, including prebiotics such as mannan oligosaccharide (MOS) and probiotics like Saccharomyces cerevisiae (SC)
The treatments were: i) basal diet; ii) basal diet supplemented with mannan oligosaccharide (Bio-Mos: Alltech Inc., Finland) at 1 g per kg of diet; iii) basal diet supplemented with Saccharomyces cerevisiae (Kavimix Biosaf®, each kg of premix contained 300×1010 CFU strain SC47, Kartal Kimya, İstanbul-Turkey) at 1 g per kg of diet
It was reported that dietary MOS (Shafey et al, 2001; Waldroup et al, 2003; Batista et al, 2007; Yalçınkaya et al, 2008) and probiotic (Denli et al, 2003; Gunal et al, 2006; Batista et al, 2007) supplementation did not affect body weight (BW) in broilers or turkeys (Bradley and Savage, 1995)
Summary
The ban against using antibiotics as feed additives in poultry diets of many countries has led to an increase in research regarding alternative feed additives, including prebiotics such as mannan oligosaccharide (MOS) and probiotics like Saccharomyces cerevisiae (SC). The benefits of MOS are based on specific properties, including modification of the intestinal micro-flora, reduction in turnover rate of the intestinal mucosa, and modulation of the immune system in the intestinal lumen These properties have the potential to enhance growth rate, feed efficiency, and livability in poultry species (Parks et al, 2001). Some authors have determined that feeding poultry both prebiotics and probiotics has been advantageous in the improvement of carcass and meat quality in bronze turkeys from 49 to 147 d of age (Cömert, 2004), as well as in broilers during the overall period (Zhang et al, 2005; Brzóska et al, 2007).
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