A.S. Series 75-36
This study concludes a series of tests in which natural and synthetic materials were used to produce deeply pigmented egg yolk. The most efficient pigmenter used was B-apo 8' carotenoic acid ethyl ester followed by 6-apo 8' carotenal, alfalfa concentrates and meals of alfalfa, corn gluten and marigold petals. In this test pure lutein, dehydrated alfalfa meal and Pro-Xan, an alfalfa concentrate, were used as sources of pigments^. The freeze dried alfalfa juice was tested for its possible effect in enhancing the utilization of pure lutein. Caged hens were depleted of body stored pigments by feeding an essentially pigment free, milo-soy diet for 12 months. Pigmenting materials were then added to the milo-soy basal to provide dietary pigment at levels of 10 and 20 ppm as shown in table 1.
Number of Pages
Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Guenthner, E.; Olson, O. E.; and Carlson, C. W., "Egg Yolk Pigmentation with Dehydrated Alfalfa Meal, Pro-Xan and Xanthophyll-free Freeze Dried Alfalfa Juice" (1975). South Dakota Poultry Field Day Proceedings and Research Reports, 1975. 11.