INFLUENCE OF STAGE OF LACTATION. 
143 
TABLE LXIJ.—Shcwing Disposition Made of Nutriment Consumed During a 
Period of 77 days by Pride. 














Total Nutriment Nutriment Total | Lbs. of Net 
Week Nutriment for for Product Nutriment to 
Daily Maintenance] Product Daily st Tepes neta 
1st LARS 57, 6.607 5.250 Grodel 81 
2nd 12.000 6.435 5.565 6.553 .88 
3rd 12.962 6.412 6.550 6 380 1.02 
4th 13.086 6.279 6.807 6.404 | 1.06 
5th 13.086 6.100 6.286 6 250 | AAO. 
6th 13.426 6 006 7.420 Gul-2 Ohi eee 
7th 13.426 5.944 7.582 6 334 steals, 
8th 13.426 5.957 7.469 | 6.003 | 1.24 
9th 13.426 5.983 7.443 | 5.767 1.29 
10th 13.426 5.903 (ea! 5.724 1 SE 
11th 13.426 5.826 7.600 §.545 | AS 
| 
Average... 6.926 6.145 3 Loa PAT 




In the performance of Pride it can be again seen that 
cows do not take full rations in the early part of the lac- 
tation period, and that when a cow’s temperament is such 
that she does not decrease so rapidly in weight of body, she 
will more quickly reach a stage when she will take a full 
ration as did Pride the 6th week, but while she received a 
full ration the last six weeks, she had not milked down to 
her normal working weight by the 11th, and was then re- 
turning a pound of total product to 1.37 pounds of nutri- 
ment, while at the same stage of lactation Trust used 1.54 
pounds. By referring to table LII it will be seen that she 
decreased in weight of body more slowly and that she used 
more nutriment to a given product yielded, and that the rate 
of decrease in weight of body has a bearing on the amount 
of nutriment required in milk production. During the 77 
days she had 533.3 pounds of nutriment available for pro- 
duct which under normal conditions would have provided 
for a yield of 85.3 pounds of butter fat. But she lost 100 
pounds in body weight and produced 105.3 pounds of butter 
fat, being 20 pounds more than the nutriment provided for. 
She therefore sacrificed 5 pounds in live weight to each 
pound of butter fat yielded in excess of that provided for by 
the nutriment consumed. 
