122 



FEEDS AND FEEDING 



8 typical feeds and 2 concentrate mixtures. He then used these values 

 and the starch values obtained by Kellner as the basis for estimating 

 the losses of energy in the mastication, digestion, and assimilation of 

 other feeds. By special permission of the authors of this volume, he 

 then computed from the average content of digestible nutrients of the 

 various feeds shown in Appendix Table III, the net energy values of 

 the most important American feeds. These net energy values are prima- 

 rily for ruminants. As pointed out later, few such data are available for 

 horses or swine. Some of the net energy values for ruminants are given 

 in the following table and a more extensive list in Appendix Table VI. 



Net energy values in 100 Ibs. of various feeding stuffs 



The last column of the table does not show the total energy in the 

 digestible portion of 100 Ibs. of the various feeding stuffs, but only the 

 net energy; i, e., that portion which is finally available to the animal 

 after deducting the losses occurring thru mastication, digestion and 

 assimilation. He expresses the net energy in therms in place of Kellner 's 



