Akademik Veri Yönetim Sistemi
XVI European Poultry Conference, Valencia, İspanya, 24 - 28 Haziran 2024, ss.475
This research aimed to evaluate the impact of muramidase supplementation on the growth performance and health parameters of Ross 308 broiler chickens in semi commercial conditions. Muramidase (MUR) is an enzyme that breaks down bacterial cell wall debris (peptidoglycans, PGNs). PGNs can have a negative impact on intestinal cells, nutrient digestibility and absorption, resulting in decreased broiler performance and health. The 42-day long study included 3200 day-old chicks. A control treatment was compared with a MUR supplemented treatment. There were 8 replicates per treatment with 200 birds, equal males and females, each. MUR was added to the corn and soybean-based control diet at 35.000 LSU(F)/kg. Growth performance was measured by feed intake and body weight for each feeding phase. Carcass characteristics were measured from 1 male and 1 female of each pen by taking the weights of hot carcass, breast and thigh meat and liver. The yields were subsequently calculated as a ratio of live weight. Intestinal health was measured by footpad dermatitis scores, oocyte counts in fresh feces, histology of jejunum samples (villus height (VL); crypt depth (CD); villus width (VW), villus surface area (VSA) and goblet cell numbers) and microbiota in ceca (total aerobe counts, lactobacillus and coliform). Results showed that MUR supplementation significantly enhanced broiler performance. The overall trial period demonstrated a higher body weight (2691.7g vs. 2520.6g; P=0.001) and a better feed conversion ratio (1.585 vs. 1.620; P=0.003) in the MUR group compared to the control. The European Productivity Index (EPEF) was also significantly improved with MUR (402.4 vs. 367.2; P=0.001). Carcass parameters showed no significant differences; however, carcass yield and breast meat were numerically improved by MUR with 1.35- and 1.08-point percentages resp. Food pad dermatitis scores were significantly lower in the MUR treated birds (1.86 vs. 2.57; P=0.041). Jejunum villus height was higher in the MUR treatment (1422.0μm vs. 1364.3μm; P=0.045). Total aerobe counts and lactobacillus counts were significantly improved in the MUR treatment (control vs MUR: 7.88 vs. 9.49 log cfu/g; P=0.009 and 7.66 vs. 9.53 log cfu/g; P=0.000 resp.), indicating potential benefits to intestinal health. There was no significant effect on oocyte counts. The study concluded that muramidase supplementation positively influences broiler growth performance by enhancing intestinal health.
Keywords: broiler; nutrition; muramidase; performance; gastrointestinal functionality