90 Rkport op Dbpahtmbnt of Animal Husbandry of the 



Table XVI. — Thk Amount of Nutrients Reduckd with an Increase of 



Pkotein. 



Average of 72 rec- 

 ords from cows 

 averaging 5.2 

 yrs. old and o.3 

 mouths in milk. 



to 

 a 



o 



,-1 =0 



^-3 



Before 



Alter 



I- 



« -3 Before 



rt 



Eti After 



Pbb 1000 Lbs. Livb Weight. 



Total 

 digest- 

 ible or- 

 ganic 

 matter. 



Lbs. 

 1.16 



14.6 



Fattn 

 milk. 



Per ct. 

 4.0 



4.1 



Dlpest- 

 Ible 

 pro- 

 tein. 



Lbs. 

 2.10 



2.54 



Fuel 

 value. 



Cal. 

 32,494 



29,02.3 



Nutri- 

 tive 

 ratio. 



1:7.5 

 1:5.2 



AVHRAGE Per 

 Day Per Cow. 



Milk 

 yield. 



Lbs 

 22.6 



21.6 



Fat In 

 milk. 



7.6s. 



.90 

 .88 



Dry 

 matter In 

 food for 

 one lb. 

 of milk 

 eollds. 



illspsf- 

 ible dr.y 

 matter In 

 food for 

 ca.-h II). 

 of milk 

 solids. 





Lbs. 

 7.8 



7-5 



Lis. 



4.9 



A REDUCTION IN AMOUNT OF TOTAL NUTRIENTS AND OF PROTEIN. 



Ill Table XVII are the average data from 109 records, eacli of 

 which covered periods when this reduction was made. The 

 diminution in millc vield was about twice as much as woukl uor- 

 mally occur under ample unchanged rations. The rate of gain 

 in live weight, which was over one-half pound per day, became 

 very slow after the change of ration. 



