Xeav York Agricultural Experimbnt Station. 



73 



TOTAL ORGANIC NUTRIENTS. 



Groupings of the different records according to the amount of 

 the total digestible organic matter are first considered. The 

 term " total nutrients " or " nutrients," whenever used without 

 (lualification in the text or tables, refers to the total digestible 

 organic matter of the feeding standards without reference to 

 the mineral matter. The term " dry matter," however, includes 

 the ash. 



CHANGE IN RATIONS WITHOUT CHANGE EST NTJTRIEINTS. 



The average from 126 individual records in which very little 

 change was made in the amount of nutrients — no change on the 

 average — shows just about the shrinkage in milk flow that 

 would normally occur at tliis stage of lactation. The average 

 month of lactation was 6.2 and the average age of the cows 4.8 

 years. There was a moderate gain in weight, the rate tending 

 to increase after the change of ration. 



Table I. — A Change in Ration but Not in Amount of Total 



Nutrients. 



Average of 126 rec- 

 ords from cows 

 averaging 4.8 

 yis. old and 6.2 

 months in milk. 



<v 

 a 



o 



Before 

 After 



CO =" 



ei ^ Before 

 ^ After 



Per 1000 Lbs. Livb Weight. 



Total 

 digest- 

 ible or- 

 ganic 

 matter. 



Lbs. 

 15.0 



15.0 



DlRPSt- 



ible 

 pro- 

 tein. 



Lbs. 

 2.06 



1.98 



Fuel 

 value. 



Cal. 

 30,030 



30,135 



Nutri- 

 tive 

 ratio. 



1:7.2 

 1:7.5 



average Per 

 Day Per Cow. 



Milk 

 yield. 



Lbs. 



21.1 

 20.5 



Fat In 

 milk. 



Lbs. 

 .90 



.86 



Fat In 

 milk. 



Per ct. 

 4-2 



4.2 



Digest- 

 ible dry 

 matter in 

 food for 

 eaoli lb. 

 of milk 

 solids. 



Lbs. 



4.9 



5-2 



