Carcass traits and meat quality of goat kids supplemented with chromium-methionine

Tuesday, July 22, 2014
Exhibit Hall AB (Kansas City Convention Center)
Ali Emami , University of Birjand, Birjand, Iran
Mahdi Ganjkhanlou , University of Tehran, Tehran, Iran
Aboulfazl Zali , University of Tehran, Tehran, Iran
Mehdi Dehghan-Banadaky , University of Tehran, Tehran, Iran
Abstract Text:

The objective of this study was to evaluate the effects of supplementing chromium-methionine (Cr-Met) on carcass traits and meat quality in Mahanadi goat kids. Thirty-two male kids (BW = 22 ± 2 kg, 4mo of age) were used in a completely randomized design to one of 4 treatments: 1) control (without Cr), 2) 0.5, 3) 1.0 and 4) 1.5 mg Cr as Cr-Met/animal/d. Diet was formulated to meet the requirements recommended by NRC with forage (alfalfa and corn silage): concentrate ratio of 30:70 in TMR form. Diets were the same, except for top-dress addition of Cr-Met fed in 2 equal meals (0700 and 1700 h). Animals were kept in individual pens for 84 d. Kids were slaughtered following the end of trial after 16-h fasting. The area of the 9th, 10th, 11th, 12th and 13th ribs together with the adjoined section of spinal column were used to estimate the amount of bone-free meat, fat and bone in the carcass. The meat, fat and bone were weighed after separation and the bone-free meat component stored at −200C for the chemical analysis. Physical meat quality parameters (drip loss, DL, pH and Warner-Bratzler shear force, WBS) were investigated on longissimus thoracis (LT) at 24 h after slaughter. Data were analyzed by GLM procedure of SAS 9.1 and Tukey test (P ≤ 0.05). The muscle, fat, and bone percentages were not affected by Cr-Met (P > 0.05). pH, moisture (%), intramuscular fat (%), crude protein content (%) and DL percentage were also not affected by Cr supplementation (P > 0.05). Supplemental Cr decreased WBS (6.89, 5.97, 5.60 and 5.83 in control to 4, respectively; P = 0.07). These results suggest that supplementation diet with Cr-Met did not influence the carcass traits and meat quality but improved tenderness of LT in Mahabadi goat kids.


Mahabadi goat kid