Effect of dietary globin, a natural emulsifier, on the growth performance and digestive efficiency of broiler chickens

Abstract

The feed utilisation of young chicks is characterised by a suboptimal fat digestibility, which can be improved by means of dietary emulsifiers. The objective of this study was to evaluate the effect of dietary Globin on the energy efficiency and digestibility of starter feeds and on the production performance of broilers throughout the whole rearing cycle. A total of 224-day-old ROSS 708 chickens (14 birds/pen, 8 replicates/treatment) were fed ad libitum with either a basal diet (C) or a basal diet with the addition of 0.05% Globin during the starter (d1-10), growing (d10-25) and finisher (d25-35) periods. Nutrient digestibility (aD), protein metabolisability (aM CP ), energy efficiency (EE) and net energy for production (NEp) were assessed during the starter period. The average daily feed intake (ADFI), average daily gain (ADG), feed conversion ratio (FCR) and protein efficiency ratio (PER) were measured of each growth period. Globin significantly decreased FCR (p ¼ .020) and increased aD fat (p ¼ .021), EE (p ¼ .028) and NEp (p ¼ .011) during the starter period. aM CP (p ¼ .049) and PER (p ¼ .039) were higher in the Globin group than in the Control group. The increased availability of energy from dietary fat, as a result of Globin supplementation, possibly shifted the use of the absorbed amino acids towards an anabolic metabolism, and this could explain the increased aM CP and PER but similar aD CP . The overall performance was similar between groups, although Globin tended to increase PER (p ¼ .064) overall. HIGHLIGHTSGlobin dietary supplementation was studied in broiler chickens. Globin improved digestibility and nutrient efficiency utilization in the first period. The overall performance was similar between groups. ARTICLE HISTORY

Titration of supplemental Bacillus subtilis subsp. subtilis American Type Culture Collection PTA-125135 to broiler chickens fed diets of 2 different metabolizable energy concentrations

“…Therefore, numerous nutritional hypotheses might explain the different results observed between the standard ME and low-ME diets, such as enzymatic digestion of protein and nonstarch polysaccharides in soybean meal or more efficient emulsification and digestion of dietary oil. Although we do not present evidence in this article for any mode of action in the gastrointestinal tract, all these modes of action have been demonstrated to improve broiler chick performance ( Singh et al., 2017 , Dabbou et al., 2019 , Hosseindoust et al., 2019 ).…”

Effects of exogenous emulsifier supplementation on growth performance, energy digestibility, and meat quality in broilers

“…In a study conducted on broilers, the results of supplementation lysolecithin in feed showed no significant effect on the growth performance of the broilers for one to 21 days [20]. In a similar study, Dabbou et al [21] reported that supplementation with natural emulsifiers for one to 10 days significantly decreased the FCR in broilers, but there were no significant differences in BWG or FI. In contrast, a study by Bontempo et al [15] showed a significant improvement in average daily gain with the supplementation of synthetic emulsifier to the feed for one to 12 days and a significant decline in the FCR for 22 to 44 days.…”

Effects of Dietary Quebracho Tannin on Performance Traits and Parasite Load in an Italian Slow-Growing Chicken (White Livorno Breed)

“…At 70 and 174 days old, excreta samples were collected from 36 pullets per dietary treatment, following the procedure described by Dabbou et al (2019) [25]. Briefly, birds were kept for 1 h in cages (3 birds of the same pen/cage).…”