Effect of vitamin A restriction on carcass traits and blood metabolites in Korean native steers

• DOI: 10.1071/an17733
• Publication Date: 2018-06-05T01:16:26Z
• Authors: Dong-Qiao Peng; Jae-Sung Lee; Won-Seob Kim; Young-Shin Kim; Mun-Hee Bae; Yong-Ho Jo; Young-Kun Oh; Youl-Chang Baek; Seong-Gu Hwang; Hong-Gu Lee
• Keywords: Marbled meat; Blood urea nitrogen

The objective of the present study was to determine effect vitamin A restriction on serum metabolites and carcass performance in Korean native steers during a fattening period. In Study 1, 61 were divided into three groups supplied diets with concentrate roughage containing 890 IU/kg provitamin then supplemented either 8000 IU (control), 3000 (T1) or 0 (T2) premix per kilogram dry matter. 2, 19 two provided same basic (control) (T) we found that concentrations significantly (P < 0.05) lower T2 group, along significant increases blood urea nitrogen, albumin, creatinine non-esterified fatty acid concentrations. T group had higher skeletal muscle mRNA expression levels myogenic factor 6 trend for greater yield grade (P=0.095). However, marbling scores showed no significant. Therefore, period associated grade, but not higher. Metabolic parameters this stage could be used as indicators future metabolic studies early health status markers steers.