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Egg Yolk and Broiler Skin Pigmentation with Sweet Potato Vine Meal , ,

Year: 1974
Type: article
Abstract: Dehydrated sweet potato vine meal (SPVM) was evaluated as a xanthophyll pigment source for broiler skin and egg yolks. In the experiment with hens SPVM was compared with alfalfa meal in a diet in which these sources provided the only source of pigment. The two diets were formulated to contain the same quantity of pigmenting xanthophylls based on chemical analysis. Egg yolk pigmentation was evaluated by use of the Roche color fan and by chemical analysis. The results indicated that the pigments of this particular sample of SPVM, which was of below average quality, were ingested, absorbed, and deposited in the egg yolk 79% as well as the pigments of alfalfa meal. In the broiler experiment the SPVM as the sole pigment source was evaluated by comparison with standard skin pigmenting substance β-apo-8′-carotenoic acid ethyl ester (apo-ethyl-ester, or AEE). Skin pigmentation was evaluated by chemical analysis of toe web samples. On this basis each gram of dietary SPVM containing 0.417 mg. of total xanthophylls or 0.365 mg. of dihydroxy pigment equivalents per gram was equivalent to 0.276 mg. of AEE. Relative to literature reports of good quality alfalfa meal evaluated under similar conditions the SPVM appeared to be an equally good pigment source for broilers. Chemical analyses of SPVM samples taken at different times during the growing season indicated that there were greater amounts of protein and carotenoids in early season as compared with late season and time of root harvest. It is concluded that the foliage of the sweet potato plant is a potential source of xanthophyll pigments for poultry.
DOI: 10.3382/ps.0530692
Language: English
Open Access status: hybrid
Estimated APC paid: $2,600
OpenAlex ID: W2018941552
FWCI: 0.706
Cites: 7
Cited by: 11
Related to: 10