520 



STATE BOARD OF AGRICULTURE. 



SUMMARY OF THE NITROGEN PRODUCTS OF METABOLISM IN THE FECES. 



Second experiment.' 



Cow 1. 



% 



Cow 2. 



% 



First period. 



Loss on drying , 



Total metabolic nitrogen. 



Second pcriud. 



Loss on drying 



Total metabolic nitrogen. 



Third period. 



Loss on drying 



Total metabolic nitrogen. 



Fourth period. 



IjOSs on drying 



Total metabolic nitrogen. 



6.1 

 15.6 



2.3 

 13.1 



0.3 

 10.2 



4.3 

 15.4 



4.2 



14.8 



2.4 

 13.1 



0.9 

 11.9 



4.2 

 14.4 



It is to be noted in this experiment that in period two with eiich anim.nl there is a remarkable lowering of the percentage 

 of both total and volitile nitrogen of metabolism on the introduction of wet beet pulp into the ration. This lowering continues 

 in period tliree in spite of the fact that the animals were getting more dry matter while in period four in which the dry matter 

 was the same as in periods one and two but dry beet pulp was substituted for wet pulp, the percentage of metabolic nitrogen 

 is practirally the same as in period one. This certainly indicates the influence of the succulent factor in the wet pulp. 



The same results were indicated in the first experiment as to the total nitrogen and partially so as to vohitile nitrogen with 

 cow number one, but in this experiment the matter was not under such perfect control and the figures for volatile nitrogen are 

 not of great value. 



*ln referring to balance table for period three, first experiment it is noticeable that wliile the nitrogen of the urine is nearly 

 the same for both animals, the nitrogen in the feces is much greater for cow number two than for cow number one. This seems 

 to indicate digestive disturbances of some nature and may account for the abnormal amount of nitrogen products of metabolism 

 in this period. 



DISCUSSION. 



It is very noticeable that foods are utilized differently by different individuals. 

 Two cows, although both are healthy and normal in every respect, will not 

 utilize the same amount of nutrients in a given feed. 



In the first experiment both cows showed a slight increase in digestibility when 

 beet pulp wet was added to the ration. In the second experiment one cow gave 

 a slight increase, while the other showed practically no change. These figures 

 are, however, so slight when an average is taken that they cannot be said to 

 prove an increase of digestibility due to the succulent feed. 



In all of the experiments a consideration of digestibility based on the nitrogen 

 as found in the feces before drying, shows that former figures of digestibility of 

 succulent feeds are given at least 5 per cent too high. Different feeds show vary- 



