The amount of each ration fed and the amount of protein and energy 

 gained by the animal body is given in Table 7. The amount of protein 

 and energy stored from the hay, citrus pulp, and grain ration was not sig- 

 nificantly different from that stored on the hay and grain ration. The 

 storage of protein and energy from the hay, citrus, and grain ration was 

 greater than that on the hay and citrus ration with the difference for pro- 

 tein being significant at the 1 percent level and the difference for energy 

 I)eing significant at the 5 percent level. 



Table 7. Average Daily Feed Intake and Gain in Protein and Energy on Each Ration 



* Represents a loss 



The chemical analyses indicate that dried citrus pulp is relatively low 

 in crude protein, higher than grain in ether extract, intermediate in crude 

 fiber, and high in nitrogen-free extract. This would indicate that it might 

 be a good source of energy. The digestion coefficients for the entire rations 

 indicate that when the hay-dried citrus pulp ration was fed, the mixture 

 was digested more efficiently than hay with respect to energ}^, ether extract 

 and nitrogen-free extract, about the same with respect to protein and more 

 poorly with respect to crude fiber. When grain was added to the hay-citrus 

 pulp ration, however, this ration was digested just as efficiently as the 

 hay-grain mixture with respect to all constituents except crude protein. 

 This indicates a supplementing effect between the energy constituents of 

 grain and citrus pulp. 



The calculated digestibility values for grain and citrus pulp actually 

 credit all the differences due to the supplementing effect to the value of 

 the grain or the citrus pulp. While this is not correct, there is no satis- 

 factory method of getting around this problem. The digestion coefficients 

 for citrus pulp fed with grain make it appear to be superior to grain with 

 respect to energy, ether extract, crude fiber, and nitrogen-free extract. This 

 is probably not the case. The truth of the situation probably is that grain, 

 citrus pulp, and hay when combined are all digested more efficiently than 

 when fed in the other mixtures. It is interesting to note that the calculated 

 value of 76.1 percent total digestible nutrients for dried citrus pulp is 

 very close to the value of 76.0 percent for dried grapefruit as obtained by 

 Neal and co-workers. Digestible protein values obtained in this experi- 

 ment, however, were somewhat higher than those reported by the Florida 

 workers. 



