Fermented-mixed feed promotes reproductive performance and egg characteristics in ageing breeding layers via improving follicular development and nutrient utilization

This study examined the impact of fermented mixed feed (FMF) on the reproductive performance, egg quality and nutrient utilization of ageing breeding layers. The feasibility of commercial application was assessed by evaluating plumage conditions and economic benefits. A total of 1200 Hy-line brown hens (62-week old) were randomly assigned to five groups, including a basal diet (control group) and a basal diet supplemented with 1%, 2%, 3% and 4% FMF. Each group contained eight replicates of ten cages having three birds per cage. The FMF was produced by fermenting a blend of 5% soybean meal, 40% wheat bran, 10% rice husk, 40% maize husk and 5% molasses. Results demonstrated that including 1%–2% FMF in the diet significantly improved egg production, fertility, hatchability and eggshell quality (p < 0.05). Additionally, FMF-supplemented diets enhanced nutrient utilization, improving feed efficiency as compared to the control group (p < 0.05). The positive effects of FMF were also evident in improved feather coverage and reduced feed costs. In conclusion, dietary addition of 1% to 2% FMF could improve laying rate, fertility, hatchability and eggshell quality by improving follicular development and nutrient utilization in ageing breeding layers, thereby being recommended for the poultry feed industry.