350 Meta-Analysis of the Effects of Dietary Inclusion of dry Distillers Grains with Solubles (Ddgs) on Performance, Fermentation, Carcass Characteristics, and Nitrogen Efficiency in Sheep

Abstract We conducted a meta-analysis to evaluate the effects of dietary supplementation dry distillers grains with solubles (DDGS) on performance, fermentation, carcass characteristics, and nitrogen efficiency in meat sheep. A total 36 peer-reviewed manuscripts from 1997 2021 met inclusion criteria for analysis. Data 940 sheep (29.1±11.5 kg) were used estimate magnitude effect between DDGS control (No DDGS) treatments weighted by inverse variance using robust estimation. Categorical continuous covariates, like breed (pure or crossbreed), CP, NDF, rate (0 100%) adjusted mixed model perform meta-regression subset Dietary increased (P < 0.05) matter digestibility (75.9 vs.74.9 %), neutral detergent fiber (55.9 vs. 53.8%) respect control. Compared control, 0.01) final body weight (51.4 50.4 tended increase = 0.06) average daily gain (254.1 247.6 g/d) Similarly, 0.10) hot cold (25.5 24.6 kg; 21.1 19.8 kg), redness (16.3 16.6) compared reduced acetate molar proportions (50.1 52.0%) acetate: propionate ratio (1.63 1.87; P 0.02). The analysis revealed that levels diet influenced yield grade weight. linearly intake rumen NH3-N, but also urinary nitrogen. should not exceed 30% prevent negative metabolism, characteristics Collectively, this study supports diets performance quality.