Effect of level and source of supplemental tannin on growth performance of steers during the late finishing phase

Abstract

Two trials were conducted to evaluate the effect of tannin supplementation of steers during the feedlot finishing phase. In Trial 1, 96 Holstein steers (478 ± 6.5 kg) were used to evaluate the effects of level of supplemental condensed tannin (0%, 0.2%, 0.4%, and 0.6% of dry matter basis) on growth performance. Supplemental tannin increased (6.5%, P = 0.05) weight gain, gain efficiency (5.5%, P = 0.04), and tended to increase dietary net energy (3.2%, P = 0.06). In Trial 2, 96 Holstein steers (392 ± 4 kg) were used to evaluate the effect of tannin sources on growth performance. Treatments consisted of a steam-flaked corn diet supplemented with (1) no supplemental tannin, (2) 0.6% condensed tannin, (3) 0.6% hydrolysable tannin, and (4) a blend of 0.3% condensed and 0.3% hydrolysable tannin. Tannin supplementation tended to increase average daily gain (ADG, 6.8%, P = 0.08) and dry matter intake (DMI, 4%, P = 0.04). It is concluded that tannin supplementation promotes greater DMI, and hence, ADG of steers during the finishing feedlot phase. The basis for this effect on feed intake is not certain, but is apparently independent of potential tannin effects on metabolizable protein supply. Source of supplemental tannin (condensed vs. hydrolysable) have minimal effects on overall growth performance response to supplementation. ARTICLE HISTORY

Dietary supplementation of quebracho and chestnut tannins mix in rabbit: effects on live performances, digestibility, carcase traits, antioxidant status, faecal microbial load and economic value

“…In the past tannins were described as anti-nutritive substance and studied for their anti-nutritional effects which reduced the performance in growing animals (Smulikowska et al 2001;Mueller-Harvey 2006). In contrast, several Authors showed lack of differences, or even increased ones, on the performances of rabbit and other species fed with diets supplemented by tannins (Liu et al 2009;2011;Omnes et al 2017;Rivera-M endez et al 2017). Similar results were observed by Liu et al (2009) in rabbits fed with chestnut tannins who hypothesised that the reason might be related to the small amount of tannins supplemented in the diet.…”

Physicochemical Quality, Fatty Acid Composition, and Sensory Analysis of Nellore Steers Meat Fed with Inclusion of Condensed Tannin in the Diet

“…Feeding tannins can promote protein degradation and improve the flow of metabolizable amino acids to the small intestine (Min, Barry, Attwood, & McNabb, ). However, depending of the dietary concentration, tannins may be toxic and can reduce nutrient digestibility (Orlandi, Kozloski, Alves, Mesquita, & Ávila, ; Rivera‐Méndez, Plascencia, Torrentera, & Zinn, ). When ingested in moderate amounts (5% DM), condensed tannins interact with proteins in the saliva, improving the digestive use of proteins that are protected against excessive ruminal degradation, reducing production of methane gas (Makkar, ; Vasta & Luciano, ), and inhibiting ruminal microorganism activity (Cação et al., ) by interfering with the biohydrogenation (BH) process (Vasta, Makkar, Mele, & Priolo, ).…”

Hydrolysable Tannin Supplementation Alters Digestibility and Utilization of Dietary Protein, Lipid, and Carbohydrate in Grass Carp (Ctenopharyngodon idellus)

“…However, in the studies of ruminant, 71.3 g/kg total tannin improved the body weight gain and feed conversion ratio in Holstein bulls (25). This may be because, tannin-protein complexes are less soluble and less accessible to proteolytic enzymes in the ruminal pH, and thereby reduce the degradation of proteins in the rumen and increased the degradation of proteins in the intestine (26). These results revealed dosagedependent and species-special effect of tannin.…”