FEEDING SWINE 



309 



The energy requirements of the ration are about 1.12 therms 

 (p. 35). 18 



The rations given in the following table have been calculated 

 according to the rather elaborate system of feeding pigs recom- 

 mended by Dietrich : 



An Approximate Ration for Pigs Intended for Breeding Purposes 



In the place of corn may be substituted rye, barley, wheat, rice, 

 etc., and linseed meal or peas for .soybeans, but in the latter case 

 the quantity fed must be increased, as peas contain less protein than 

 the other feeds. " This would also increase the carbohydrate, 

 hence the corn would have to be correspondingly decreased. Or these 



FIG. 82. A cement feeding floor provided with sanitary substantial troughs is an essential 

 to a well-equipped piggery. (Wisconsin Station.) 



may be left out and more skim milk added. Some of the protein 

 may also be supplied in the form of clover or alfalfa. If skim milk 

 is not available, more of some other nitrogenous feeds may be sup- 

 plied, and also more water, as milk is 85 to 90 per cent water. If 

 tankage containing 60 per cent protein is used in place of soybean 

 meal, much less will suffice, as tankage is richer in protein. 



" The above is intended for dry-lot feeding (Fig. 82). If pigs 

 are on pasture, these quantities should be reduced. If the above 



18 Illinois Bulletin 163; Circulars 126, 133, and 153. 



