66 MASS. EXPERIMENT STATION BULLETIN 417 



Corn Distillers' By-Products in Chick Rations. (Raymond T. Parkhurst and 

 Leonard E. Parkinson of the Nutrition Laboratory, in cooperation with Walter L. 

 Nelson and Frances E. Volz, Schenley Research Institute, Lawrenceburg, In- 

 diana.) Corn distillers' dried grains without solubles were used satisfactorily in 

 the starting and broiler rations to replace ground oats and dried solubles, but not 

 wheat bran and dried distillers' solubles. The feed efficiency was somewhat im- 

 proved by the inclusion of corn distillers' dried grains without solubles; the differ- 

 ence in pigmentation and feathering was negligible. 



Corn distillers' grains with solubles satisfactorily replaced dried skimmilk 

 and wheat bran, wheat middlings, or ground oats in a starting ration for chicks, 

 with an improvement in the feed efficiency. 



Soybean oil meal with corn distillers' grains successfully replaced all the dried 

 skimmilk, fish meal, and meat scraps in the starting ration. 



Corn Distillers' By-Products in Laying and Breeding Rations. (Raymond T. 

 Parkhurst in cooperation with Carl R. Fellers, Department of Food Technology, 

 and John W. Kuzmeski of the Feed Control Service.) Three corn distillers' 

 dried by-products — grains without solubles, grains with solubles, and solubles — 

 were used as replacements in complete all-mash rations for Rhode Island Red 

 and crossbred pullets in laying cages. 



When the distillers' by-products replaced dried skimmilk pound for pound in 

 rations containing either meat scraps or fish meal, there were no appreciable 

 differences in egg production, feed consumption, feed efficiency, weight of egg, 

 yolk color, open egg quality, egg shell texture, body weight changes, or mortality. 

 Hatchability was not satisfactory when grains without solubles replaced dried 

 skimmilk. Corn distillers' dried grains without solubles, when used to the extent 

 of 10 percent in laying rations containing meat scraps, gave good egg production. 



Corn distillers' dried grains with solubles, when used at the 10 percent level, 

 with soybean oil meal and without animal protein supplements, proved satis- 

 factory for egg production. When grains with solubles, up to 20 percent of the 

 ration, were used to replace all the soybean oil meal and part of the ground barley 

 and wheat bran in rations containing meat scraps but no dried skimmilk, egg 

 production was satisfactory and the hatchability of fertile eggs was very good. 

 With fish meal as a supplement, 5 percent of grains with solubles satisfactorily 

 replaced either 2.5 percent of dried skimmilk or 3.5 percent of dried solubles. 



Corn distillers' dried solubles, with soybean oil meal and without any animal 

 protein supplements, proved of outstanding value for egg production. With 

 fish meal as a supplement, satisfactory egg production and hatchability resulted 

 when 3.5 percent dried solubles replaced 2.5 percent of dried skimmilk. 



Corn distillers' by-products had no adverse effect on the weight of eggs, body 

 weight gains, or egg qualit}- as measured by shell breaking strength, height of 

 albumen, and yolk color. 



Fish meal proved a more valuable supplement for distillers' by-products than 

 meat scraps for feed efficiency and hatchability. In combination with fish meal, 

 equally good egg production and hatchability results were obtained when dried 

 skimmilk was replaced by distillers' dried solubles, distillers' grains with solubles, 

 or fermentation solubles. 



Supplement for Distillers' Dried By-Products in Breeding Rations. (Ray- 

 mond T. Parkhurst in cooperation with John W. Kuzmeski of the Feed Control 

 Service.) In further studies with distillers' dried by-products, more evidence 

 was obtained that fish meal contains one or more hatchability factors not yet 

 identified and other than riboflavin, pantothenic acid, choline, or biotin. Hatch- 

 ability was best in the groups of birds getting a ration containing 20 percent 



