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Effect of two marigold­-based yellow pigments on chicken pigmentation

Published: August 11, 2014
By: M.Blanch*1, R. Gonzalez ­Esquerra1, M. Vazquez ­Anon1 (Novus International Inc.), and C. Lopez­ Coello (FMVZ­ UNAM, Mexico)
Skin pigmentation is a key factor in poultry meat consumer acceptance and perceived quality and it is influenced by xanthophylls added in the diet. Xamacol Liquid Max (XLM) is the new generation of marigold liquid products developed by Novus Int. (Missouri). The objective of this study was to compare the pigmenting efficiency of XLM with a major commercial marigold product high in zeaxanthin (COM) in broilers. A total of 2,800 Ross 308 1 d­old unsexed broilers were used until 45 d of age. A basal sorghum/soya commercial diet was used comprising 3 phases: starter (1–21 d, no pigments), grower (22–35 d, 75 ppm yellow + 1 ppm canthaxanthin) and finisher (36–45 d, 85 ppm yellow + 2 ppm canthaxanthin). There were 8 treatments: 2 products (XLM and COM) at 3 equimolar levels of yellow pigment (75, 85 and 100%, with respect to Mexican commercial practice) plus 2 negative controls (with and without additional red pigment). Each treatment had 7 replicates of 50 birds/pen.

Skin color was evaluated at pectoral pterilium area of 8 birds per pen (4 males and 4 females) at 45 d in live birds and in cold carcasses using a Minolta CR­300 Spectrophotometer. Data were analyzed by 1­way ANOVA and 2 × 3 factorial design. In vivo measurements showed higher yellowness (CIE b*) in XLM groupcompared with COM in males (24.4 vs 21.8; P < 0.0001) and females(27.3 vs 24.7; P = 0.0003); and lowest dose of XLM (XLM70%) showed equivalent yellowness than highest dose of COM (COM100%). Females in XLM presented lower redness (CIE a*) than in COM (1.08 vs 1.55; P = 0.003), still the numerical difference was very low. Skin yellowness in cold carcasses was higher with XLM than COM in males (53.0 vs 50.1; P = 0.0004) andfemales (53.1 vs 50.1; P = 0.0004), showing equivalent pigmentation in XLM70% than in COM100%. In summary, XLM showed a higher pigmentation than COM on broiler skin pigmentation in both live broilers and cold carcasses, so lower levels of XLM could be used to attain similar yellowness than COM fed at commercial levels.

Key Words: broiler, pigment, yellow xanthophylls
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tosin olonijolu
3 de noviembre de 2020
Like to hear advance research by any professional in the group of possibility of tithonia diversifolia working as toxin binder in feed manufacturing for chicken
tosin olonijolu
3 de noviembre de 2020
The marigold used in the research, is it the same as the tithonia diversifolia?
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