The Value of Choline Additions to a Corn and Soybean Oil Meal Chick Ration Containing Distillers’ Dried Solubles ,

THE role of choline and methionine in chick nutrition was reviewed in previous papers (Marvel et al. 1944, 1945). The development of a modified chemical method for the determination of choline (Engel 1942) has made possible the study of choline deficiency in chick rations. The choline content of some poultry feeds has been reported by Engel (1943), and by Rhian et al. (1943). This report compares the choline content of chick rations with the growth responses. EXPERIMENTAL The experiments were conducted in the same manner as described in previous reports. Baby chicks were Barred Plymouth Rocks obtained from local hatcheries or hatched from Experiment Station stock. Chicks were sexed by the method of Quinn and Knox (1939), wing-banded, and distributed into lots according to weight. Approximately 40 chicks were started in each lot, but the numbers were reduced to 25 at four weeks by discarding all chicks except the median . . .