124 



FEEDS AND FEEDING 



173. Standards for growing animals. The requirements for growing 

 cattle, sheep, and swine, according to Armsby, are as follows. No data 

 have as yet been given for horses. These figures include the amounts 

 of digestible protein and net energy required for mere maintenance. 



Requirements for growth, including maintenance, per head daily 



(1) Cattle 



Sheep 



(3) Swine 



These tables show that a 6-months-old beef calf, weighing 350 Ibs., 

 requires 1.15 Ibs. digestible protein and 5.0 therms net energy daily. 

 When it reaches the weight of 1,000 Ibs., or three times as much, it 

 requires but 0.15 Ib. more digestible protein and only about twice as 

 much net energy. This relative lessening in feed requirement as the 

 animal grows older is due to the fact that it is gaining less rapidly per 

 unit of body weight and that as it becomes larger it requires relatively 

 less for maintenance, as has been pointed out before. (90, 114) 



