58 ELEMENTAKY TREATISE ON STOCK FEEDS AND FEEDING 



forming fatty tissue but the carbohydrates are transformed into 

 fats before being stored as such. Therefore in the animal body 

 we have four classes of compounds namely, protein, fats, water 

 and ash. As an energy and heat producer, fats have a greater 

 value than carbohydrates. Fats are considered as being 2.25 

 times more valuable than carbohydrates in this respect. In other 

 words, one pound of fat is worth 2.25 times as much as one 

 pound of carbohydrates for animal fuel. One pound of fat is 

 worth about two pounds of protein and one and three quarters 

 pounds of carbohydrates in the production of animal fat. Fats 

 and carbohydrates cannot form body tissue. 



Summary. — The nutrients of the animal body serve the same 

 pui-poses as furnished by the nutrients of feeds. When there 

 is a deficiency in a diet, the protein and fats, or the fats of the 

 animal body are used to help keep the animal going. A suffi- 

 ciency of carbohydrates and fats in a ration prevents protein 

 from being drawn upon, but a deficiency of carbohydrates and 

 fats causes protein from the flesh of the animal to be used. 

 Hence it is necessary that animals receive sufficient carbohydrates 

 and fats to insure development and ample protection of the body. 



Ci<ASSiFiCATiON OP THE Functions of the Nutrients.' 



\ ofl 

 ( anc 



Supplies materials for the bones, hard parts and framework 

 Ash -j of the body. Helps build up the blood, tissues, secretions 



and digestive fluids. A necessity for all animal life. 



f The flesh formers. Substances for the making of lean 

 ■p -j._;„ i meat, muscles, skin, ligaments, horn, hair and milk. 



"^ I Sometimes used as fuel to give warmth and energy when 



[ there are deficiencies of fats and carbohydrates. 



p . ■/ Furnish fuel to keep the animal warm. Help to produce 



(. energy. Aid in the production of fatty tissue. 



{Supply the fuel to keep the animal warm and to produce 

 energy. Are transformed into fats for the production of 

 fatty tissue. 



1 The idea and some of the data in this classification came from Bui. io6, North Caro- 

 lina E:tperiment Station. 



