FEEDING STANDARDS 



B Per day and per head. 



139 



required to keep the animal alive, which is producing and do- 

 ing nothing, without a loss or gain in weight, is called the main- 

 tenance requirement. It is then the amount of nutrients re- 

 quired to maintain the animal body. The feeding standard for 

 "oxen at rest in stall" is an example of a maintenance require- 

 ment. 



Growth Requirements. In the composition of farm animals 

 we found that the young animal contains a larger percentage of 

 water than the mature animal, and a gain in weight of the young 

 animal shows less dry matter and more water than with the 

 mature animal. We also learned that the dry matter of the 

 young animal contains more protein and less fat than that of the 

 mature animal. Hence the requirements for growth show a 

 larger proportion of protein to carbohydrates than for the older 

 animals. The following standards per 1,000 Ibs. live weight, 

 illustrate this point. 



