MILK PRODUCTION 



513 



for the several grades of milk have been increased by 5 per cent, 

 giving the following results, which may be used provisionally 

 to compute from the figures of Table VII of the Appendix 

 the rations required for the production of milk of different 

 grades. 



TABLE 145. EQUIVALENT ENERGY VALUES FOR FATTENING 



606. Concurrent fattening. Were all the surplus feed above 

 the maintenance requirement applied to milk production, it 

 would be a comparatively simple matter to compute the amount 

 of feed energy required in a daily ration. Thus, if a cow weigh- 

 ing 1000 pounds were capable of producing 25 pounds of 4.5 

 per cent milk daily, the net energy required in her ration would 

 be computed as follows : - 



For milk production 25 Ib. of milk 291 Cals. 

 For maintenance 



7.275 Therms 



6.000 Therms 



13.275 Therms 



Attention has been called several times, however, to the 

 fact that in the milking animal at least two forms of production 

 are possible, viz., milk and increase of body tissue (fattening), 

 only the former of which is usually desired. To these may 

 perhaps be added, as a third form of production, a possible 

 stimulation of the incidental muscular activity of the animal 

 by heavy feeding (609). Evidently if conditions are such that 



1 Including 5 per cent allowance for difference in digestibility. 

 2 L 



