142 MASS. EXPERIMENT STATION BULLETIN 186. 



Part II. 



THE VALUE OF CORN BRAN FOR MILK 

 PRODUCTION. 



Summary and Suggestions. 



1. Corn bran contains noticeably less ash, protein and fat, and some- 

 what more extract or starchy matter, than does wheat bran. 



2. Digestion experiments with sheep recently made at this station 

 showed that 80 per cent, of its dry matter was digestible as against 66 per 

 cent, for wheat bran. 



3. A definite amount of dry matter contained in a ration composed of 

 hay, gluten feed, ground oats, cottonseed meal and corn bran produced, 

 in an average of two experiments, substantially as much milk and milk 

 ingredients as a like amount of dry matter in a ration composed of hay, 

 gluten feed, ground oats, cottonseed meal and wheat bran. 



4. The gains in live weight were about the same on each ration. 



5. Corn bran, if properly combined'in a grain ration, is likely to give 

 as satisfactory returns as wheat bran. It may constitute 30 per cent, of 

 the ration, together with 30 per cent, cottonseed or linseed meal, 20 per 

 cent, corn or hominy meal, and 20 per cent, ground oats 5 or a ration 

 may be combined consisting of 40 per cent, corn bran, 20 per cent, gluten 

 feed, 20 per cent, cottonseed or linseed meal, and 20 per cent, ground oats 

 or barley. A combination of corn bran, gluten feed and corn meal would 

 not be satisfactory because of a deficiency in ash, and because all three 

 constituents would be derived from corn. 



The Experiment in Detail. 



What Corn Bran is. — Corn bran is the hull or skin of the corn kernel, 

 together with a small amount of the germ, and the starchy portion which 

 it is impossible to separate out in the process of manufacture of various 

 corn products, such as starch and glucose. The bran thus obtained was 

 formerly dried and sold by itself, but at present it is more often sold as a 

 constituent of hominy feed or proprietary mixed feeds, or is mixed with 

 corn gluten as a component of gluten feed. It is still sometimes found in 

 the markets of Massachusetts, and has been offered at a reasonable price. 

 It has been shown, by means of experiments^ conducted at various times, 



1 Massacbusetta Experiment Station Bulletin No. 181, p. 316. 



