New York Agricultural Experiment Station. 



Ill 



A RISDUCTION OF PROTEIN WITH LITTLE CHANGE IN AMOUNT OF 



NUTRIENTS. 



One hundred records which cover periods when there was a 

 reduction of the protein with little change in amount of nutri- 

 ents give the average found in Table XXXIII. Following this 

 change there was just about the normal decrease in milk yield. 

 The moderate rate of increase in live weight was slightly 

 increased. 



Table XXXIII.— A Reduction of Protein with Little Change op 



NUTKIENTS. 



Average of 100 ree- 

 urds from cows 

 averaffing 4.7 

 yrs. old a)i<l 7.1 

 moutlis iu luilk. 





Before 

 After 



S-i 



a 



on 4) 

 ^^ 



03 



r 00 



2 1-1 



ci-3 Before 

 ^ After 



Per 1000 Lbs. Live Weight. 



Total 

 digest- 

 ible or- 

 ganic 

 matter. 



Lbs. 

 15.2 



15.1 



Digest- 

 ible 

 pro- 

 tein. 



Fuel 

 value. 



Lbs Cal. 



2.23 30,155 

 1.84 30,016 



Nutri- 

 tive 

 ratio. 



1:6.7 

 1:7.9 



Average Per 

 Day Per Cow. 



Milk 

 yield. 



Lbs. 

 19. 



18. 



Fat in 

 milk. 



Lbs 



.81 

 .81 



Fat in 



milk. 



Per ct. 

 4.2 



4.3 



Dry 



matter in 



food for 



one lb. 



of milk 



solids. 



Lbs. 

 8.4 



8.2 



Digest- 

 ible dry 

 maitcr in 

 food for 

 eaeh lb. 

 of milk 

 solids. 



Lbs. 



5.5 

 5.6 



A REDUCTION OF PROTEIN WITH SOME INCREASE IN AMOCNT OP 



NUTRIEINTS. 



The average for 58 records when this change in the ration 

 was made is shown in the following table. The accompanying 

 reduction in milk yield Avas slight, much less than would nor- 

 mally occur for a similar pcu'iod. The live weight increased 

 much faster after the change. 



