All levels of dietary supplementation of marigold extract produced more intense yellow color in the shank skin compared to the shank skin of non-supplemented broiler (Table 4). Shank skin color intensity was highest in MG200 followed by MG150, MG100, and MG0 (linear effect, p<0.000; quadratic effect, p<0.05). Breast and thigh muscle yellowness (b*) was significantly higher (linear effect, p<0.000; quadratic effect, p<0.05) in MG200 broilers. Breast and thigh muscle redness (a*) and lightness (L*) were not significantly affected by marigold extract supplementation. Castaneda et al. (2005) also reported that natural pigments weremore efficient in producing maximum skin yellowness.In addition, Sirri et al. (2010) measured higher skin yellowness in all body parts of chickens fed 12 to 15 mg xanthophylls per kg feed, and Ponsano et al. (2004) reported that oxycarotenoids produced by microorganisms enhanced yellowness in the skin and breast and thigh meat of broilers.
การแปล กรุณารอสักครู่..