<b>Growth performance, meat quality, and carcass characteristics in growing and fattening Hanwoo steers fed bentonite

Abstract

ABSTRACT. Thirty-six castrated, seven months-old Hanwoo steers (initial body weight: 184 ± 5.2kg) were assigned to three treatments over 23 months to evaluate the effects of supplementation with bentonite (0, 0.1 and 0.3%) on growth performance and carcass and meat characteristics. A completely randomized design with three replicates was used. The inclusion of a bentonite-supplemented diet had an influence on final weight, total weight gain, and average daily gain. Bentonite supplementation had no significant effect on proximate composition and meat quality. For carcass characteristics, there were no significant differences in yield traits and quality traits between treatments (but not cold carcass weight, marbling score, and quality grade). It was concluded that supplementation with bentonite (0.1 and 0.3%) improved growth performance, cold carcass weight, marbling score and quality grade compared with the control, except for meat quality.Keywords: bentonite, Hanwoo steers, quality traits, yield traits.Desempenho, qualidade da carne e características de carcaça em novilhos Hanwoo em crescimento e engorda alimentados com bentonita RESUMO. Para avaliar os efeitos da suplementação com bentonita (0, 0,1 e 0,3%) sobre o desempenho de crescimento e características da carcaça e da carne, foram avaliados 36 novilhos Hanwoo, castrados, com sete meses de idade (peso inicial: 184 ± 5,2 kg) distribuídos nos três tratamentos. Utilizou-se um delineamento inteiramente casualizado com três repetições. A inclusão de uma dieta suplementada com bentonita teve influência no peso final, ganho de peso total e ganho médio diário. A suplementação com bentonita não teve efeito significativo na composição centesimal e na qualidade da carne. Para as características de carcaça, não houve diferenças significativas nas características de rendimento e de qualidade entre os tratamentos (mas não o peso da carcaça fria, nível de marmoreio e grau de qualidade). Concluiu-se que a suplementação com bentonita (0,1 e 0,3%) melhorou o desempenho de crescimento, peso de carcaça fria, nível de marmoreio e grau de qualidade em relação ao controle, com exceção da qualidade da carne.Palavras-chave: bentonita, novilho Hanwoo, características de qualidade, características de rendimento.

Immunity Response and Reproductive Performance of ‎lactating Friesian Cows Treated With Bentonite

“…This result reflects the beneficial effect of bentonite supplementation in improving the body condition and feed utilization of dietary nutrients in pregnant treated cows as compared to controls. These findings are in agreement with some improvement in Hanwoo steers body weight in association with bentonite supplementation (Young-Jik et al, 2017), and body weight of litter and sow fed diet with clay elements supplementation (Kyriakis et al, 2002). Contrary, Lee et al (2010) did not find any effect for clay elements on the body weight gain of Hanwoo cattle.…”

Ruminant Lick Blocks, Particularly in China: A Review

“…In addition, bentonite contains some macro and trace minerals, including potassium, sodium, magnesium, aluminum, iron and zinc [59]. It was reported that adding 0.1% to 0.3% to the diet for beef cattle can improve average daily gain (ADG), cold carcass weight, marbling score and quality grade without any adverse effects [60]. In an in vitro gastrointestinal tract study, bentonite adsorbed mycotoxins such as aflatoxin, zearalenone and deoxynivalenol [61], thereby inhibiting or reducing the absorption of mycotoxins.…”