Feeding rice fermented beer waste improves growth performance, nutrient digestibility and nitrogen utilization in growing rabbits

Abstract

This study was conducted to investigate the effects of dietary rice brewer waste (RBW) on growth performance, nutrient utilization and nitrogen balance in growing rabbits. Thirty growing rabbits (758 ± 25.7 g initial body weight) were randomly assigned to control and four treatment groups (containing RBW) in a completely randomized design with six rabbits per group. The study lasted 6 weeks for measurements of feed intake and growth performance followed by a five‐day metabolic trial to determine nutrient digestibility and nitrogen balance. The five diets contained RBW at 0% RBW (control group), unsterilized RBW at 10% and 20% and sterilized RBW at 10% and 20% in the concentrates. The average daily body weight gain (ADG) in the 20% unsterilized RBW group was higher (p < 0.01) than the control group. No statistically significant difference (p = 0.089) of ADG was observed for the control vs. the sterilized groups, but the overall ADG was better (p = 0.044) in the unsterilized RBW groups than the sterilized RBW groups. The daily dry matter intake in unsterilized and sterilized RBW groups was higher (p < 0.01) than the control group. However, no difference (p = 0.22) was found between the unsterilized and sterilized RBW. The feed conversion ratio (FCR) was lower for the unsterilized RBW groups vs. the control group (p = 0.041), but there was no difference of FCR in the control vs. sterilized RBW groups (p = 0.37) and the unsterilized RBW groups vs. unsterilized RBW groups (p = 0.14). The digestibility of organic matter, crude protein and crude fibre was greater (p < 0.01) in the unsterilized and sterilized RBW groups than the control group. The nitrogen balance and efficiency of nitrogen utilization were also higher in the unsterilized and sterilized RBW groups than the control group (p < 0.01). The study showed that the dietary RBW could improve growth performance and nutrient utilization in growing rabbits with superior responses for the unsterilized RBW.

Influence of Fermented-Moutai Distillers' Grain on Growth Performance, Meat Quality, and Blood Metabolites of Finishing Cattle

“…The Ile and Arg contents in beef from the R1 and R2 groups were higher than those in the control group, but the difference was not significant, indicating that different amino acids in feed have varied conversion efficiencies ( 37 ). Another possible reason is that FMDG contain probiotics that bind with epithelial cells of stomach and bowels and help to synthesize the amino acids which result in improving the content of amino acids in beef ( 15 , 38 , 39 ). We detected 17.13–21.23 g/100 g of total amino acid (TAA) content in beef; including 7 essential amino acids (EAAs): threonine (Thr), valine (Val), methionine (Met), Ile, Leu, phenylalanine (Phe) and Lys at 7.09–8.68 g/100 g, and 7 non-essential amino acids (NEAAs): Asp, serine (Ser), Glu, proline (Pro), glycine (Gly), alanine (Ala), and tyrosine (Tyr) at 8.24–10.22 g/100 g ( Table 4 ).…”

“…The dry matter, crude protein, neutral detergent fiber, and acid detergent fiber contents of Moutai DG are 30.46%, 21.84% DM, 36.85% DM, and 24.72% DM, respectively, according to our preliminary analysis, and the amino acid content is high, indicating that Moutai DG is a good feed resource. Previous studies found that fermented distillers' grains contain probiotic culture, prebiotic and postbiotic properties that are useful for growth performance ( 15 ). Numerous studies have examined the nutritional value of dry DG and its effects on livestock feeding and found that adding an appropriate amount of DG to the diets of cattle did not affect feed efficiency, growth performance and meat quality ( 16 – 19 ).…”