Egg production, egg quality, nutrient digestibility, and excreta microflora of laying hens fed with a diet containing brewer’s yeast hydrolysate

Abstract

The objective of this study was to determine the effects of brewer's yeast hydrolysate (BYH, Saccharomyces cerevisiae) on laying hens. A total of 288 Hy-line Brown laying hens were randomly assigned to 1 of 6 treatments with 8 replications (6 birds per replication). The treatment diets were supplemented with BYH at levels of 0, 0.05, 0.10, 0.50, 1.0 or 3.0%, respectively. The supplementation of BYH diets led to a significant linear (P < 0.05) effect on egg production, egg weight and egg mass during 37-41 and 42-46 weeks. The supplementation of BYH diets also led to a significant linear increase observed in internal egg quality: albumen height (37-41 and 42-46 weeks), Haugh unit (42-46 weeks), and yolk colour (37-41 and 42-46 weeks), and a significantly linear increase in eggshell thickness (P < 0.05) during 37-41 and 42-46 weeks. A linear increase was observed on dry matter and nitrogen at 46 weeks of laying hens, and linear increase and linear decrease were detected for Lactobacillus and E. coli at 46 weeks of laying hens, respectively. As a result, dietary BYH had beneficial effects on egglaying performance, egg quality, nutrient digestibility, and excreta microflora in laying hens.

Yeast-Derived Products: The Role of Hydrolyzed Yeast and Yeast Culture in Poultry Nutrition—A Review

“…Other authors have investigated the potential of HY to control pathogens, reporting contrasting results. Park et al [ 90 ] observed a linear reduction in E. coli in the excreta of laying hens fed different levels of HY, which is in line with the results observed in broiler chickens receiving HY [ 65 ] or AY [ 67 ]. Similar results are also reported by Muthusami et al [ 69 ], who observed lower counts of E. coli and Salmonella spp.…”

“…Different authors have investigated the effect of HY on the Lactobacillus count, reporting a linear increase in the excreta and ileal digesta of broilers receiving 1 and 2 g/kg of feed HY [ 65 , 69 ], as well as in laying hens receiving 0.5, 1, 5, 10, or 30 g/kg of HY [ 90 ].…”

“…However, while in broiler chickens, HY and EHY were found to improve the energy digestibility, the result was not confirmed in laying hens, where the energy digestibility showed no significant differences between the control animals and the animals receiving HY. [ 90 ].…”

Influence of Low and High-density Diets with Yeast Supplementation on Feed Intake, Nutrient Digestibility, Egg Production and Egg Quality in Hy-line Brown Laying Hens

“…(Hassanein & Soliman, 2010) demonstrated that hens egg production was positively affected in higher concentration 0.4, 0.8, 1.2, and 1.6% of yeast supplementation. However, Araujo et al (2017) and Park et al (2020) reported that the addition of the diet of the breeder hens with the hydrolyzed yeast resulted in a 2.14% improvement in egg production and broken rate. Therefore, it may be due to the bird's age, heat stress, inadequate nutrient problems in a feed (calcium and vitamin D3), and yeast concentration.…”

Effects of yeast hydrolysate on growth performance, serum parameters, carcass traits, meat quality and antioxidant status of broiler chickens

“…13,14 Moreover, relevant research studies on aquatic animals have indicated that fish fed with yeast hydrolysate showed enhanced activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT), but decreased concentration of malonaldehyde (MDA) in the liver. 5,10 Park et al 15 indicated that yeast hydrolysate (YH) improved egg production and quality as well as nutrient digestibility of laying hens, and Fu et al 16 showed that YH enhanced antioxidant capacity in serum as well as the counts of beneficial bacteria in cecum of growingfinishing pigs.…”