Effect of an Enzymatic Blend and Yeast on the Performance, Carcass Yield and Histomorphometry of the Small Intestine in Broilers from 21 to 42 Days of Age

Abstract

The present study was conducted to evaluate the performance, carcass yield, and histomorphometry of the small intestine of broilers fed yeast sugarcane supplemented with enzymatic blend from 22 to 42 days of age. Seven hundred broiler chicks were distributed in a completely randomized design in a factorial design (2x3+1), two levels of the enzyme blend (0 and 200 g/ton), three protein levels (0%, 6% and 12%) and a control diet. The level of 6% yeast showed higher feed intake and weight gain after 33 days. From 22 to 42 days there was no significant effect (p<0.05) to the use of yeast in animal performance, carcass yield and cuts. At 42 days an interaction between the factors for width and crypt depth in the duodenum and jejunum, respectively, was observed. The inclusion of yeast in the diets for broilers from 22 to 42 days did not affect the performance and yield of the carcass. Yeast increased the muscle wall of the jejunum. The use of the enzymatic blend did not influence performance but affected the integrity of the intestinal mucosa.

Effects of live yeast (Saccharomyces cerevisiae) as a substitute to antibiotic on growth performance, immune function, serum biochemical parameters and intestinal morphology of broilers

“…Live yeast is a rich source of small peptides with free amino acid which has a high rate of digestion and absorption that could effectively improve feed utilization in broilers. A recent study (Sousa et al 2019) reported that when broilers are fed with 6% yeast resulted higher body weight gain with lower FCR during the finisher period, but no differences were observed on feed intake in broilers. Similarly, inclusion of yeast-derived products in broilers diets could improve body weight gain and FCR (Ding et al 2019).…”

“…Live yeast (LY) is one of the most potential micro-organism-derived products that can be used in animal ration as a dietary supplement (Sousa et al 2019) as well as a potential alternative to feed antibiotics in animals (Shen et al 2009). Mannanoligosaccharide, derived from the outer cell wall of yeast (Saccharomyces cerevisiae), can be applied as a growth promoter as well as a possible alternative to antibiotics in broiler diets (Yang et al 2007).…”

Dietary live yeast supplementation alleviates transport‐stress‐impaired meat quality of broilers through maintaining muscle energy metabolism and antioxidant status

“…Although He et al 28 . reported that dietary LY supplementation had no significant effects on ADG and FCR during the whole experimental period, Sousa et al 29 . found that the ADG and FCR during the finisher period were increased in broilers fed diets containing 6% yeast.…”

“…A number of researches in poultry have been conducted to evaluate the function of LY, which indicated that LY is an effective feed additive which can improve growth performance and health of broilers. 15,16 Although He et al 28 reported that dietary LY supplementation had no significant effects on ADG and FCR during the whole experimental period, Sousa et al 29 found that the ADG and FCR during the finisher period were increased in broilers fed diets containing 6% yeast. In the present study, we found that dietary LY supplementation (1000 mg kg −1 ) in broilers beneficially increased final BW and ADG, which indicates the improved growth performance.…”

Baker’s Yeast (Saccharomyces cerevisiae) and its application on poultry’s production and health: A review

“…This ensures a rapid rate of digestion and absorption, which could significantly enhance feed utilization. According to a recent study by Sousa et al (35), feeding broilers yeast resulted in increased body weight gain and a decreased feed conversion ratio during the finisher phase, but no alterations in feed consumption were identified in broilers. In the same study, yeast improved protein digestibility in broilers.…”