Effects of Ruminally Protected Amino Acid-enriched Fatty Acids on Growth Performance and Carcass Characteristics of Fattening Hanwoo Cows

Abstract

This study was conducted to determine the effects of ruminally protected amino acid-enriched fatty acids (RPAAFA) on body weight gain, feed intake and carcass characteristics of fattening Hanwoo cows. Twenty eight Hanwoo cows, 6.0±1.7 years old and weighing an average of 463.2±77.6 kg, were used for 4 months. Animals were fed a basal diet supplemented with RPAAFA at 0 g (control) and 100 g (treatment), respectively. Average daily gain, dry matter intake and feed conversion ratio were not different among the control and treatment. The supplementation of RPAAFA did not affect carcass weight and rib eye areas. Quality grade score (1 ++ , 1 + and 1) for treatment was higher in RPAAFA supplemented group compared with the control, whereas no differences appeared in meat color, fat color, texture and maturity. Thus present results indicate that supplementation of RPAAFA may be recommended for producing high quality beef from fattening Hanwoo cows.

Effects of Dietary Multi-nutritional Targeted Supplementation According to Different Growth Stages on Performance and Carcass Characteristics of Hanwoo Steers

“…The appearance rate of high quality grade increased in steers fed RPAFA from 17 to 28 months of age and RPCV from 22 to 28 months of age. Similarly, Park et al (2008) reported that supplementation with 100 g of RPAFA had positive effects on meat quality grade due to increasing supply of fatty acids and limiting amino acids such as methionine and lysine in finishing Hanwoo steers. In addition, it was hypothesized that inclusion of the methionine of RPAFA could be associated with increase in high quality grade related to marbling score.…”

“…While Park et al (2008) reported that supplementation with 100 g of ruminally protected amino acid-enriched fatty acid (RPAFA) had a preferential effect on meat quality graded as well-marbled due to increasing supply of fatty acids and limiting amino acids (methionine and lysine) in finishing Hanwoo steers. In addition, previous studies found that ruminally protected choline had positive effects on DMI, ADG, feed conversion ratio and carcass weight in finishing cattle fed high concentrate diets (Drouillard et al, 1998;Bryant et al, 1999).…”

Effect of Rumen Protected Methionine and α-Tocopherol on Growth Performance, Carcass Characteristics, and Meat Composition of Late Fattening Hanwoo Steer in High-Temperature Seasons

“…In addition, because backfat thickness is the highest correlated with the decrease in carcass yield grade [ 27 ], decrease in the yield grade score of the treatment group is related to higher backfat thickness in the present study. On the other hand, Kim et al [ 28 ] and Park et al [ 29 ] reported that marbling scores were increased by the supplementation of rumen-protected methionine and lysine in Hanwoo steers, suggesting that methionine is a methyl donor for the transmethylation reaction [ 30 ] in lipid transport and biosynthesis. Although no statistical significance was observed in this study, the marbling score was increased by supplementation with rumen-protected methionine, which is similar to the results from previous studies.…”

Suplementación lipídica para la producción de carne bovina en confinamientos

“…El uso de grasas protegidas ofrecen una protección ruminal, por lo tanto, pueden tener ventajas en comparación con la grasa no protegida puesto que aumenta el flujo de AGIS y reducir el riesgo de trastornos digestivos (53). La evaluación de la suplementación de 3 tipos de grasa protegida al 5% en rumiantes ovinos de raza Dorper sobre el consumo, la digestibilidad, la población y el metabolismo ruminal, reporta que el CMS no es influenciado, la digestibilidad de igual forma no es afectada, sin embargo difiere entre los 3 tipos de grasa (54).…”