Apr. 1. 1918 Basal Kataholism of Cattle and Other Species 



49 



The data of Table III also show a positive correlation between the 

 basal katabolism per square meter of body surface and the live weight, 

 especially for the lying position, as appears from Table V. In other 

 words, the basal katabolism tended to increase more rapidly than the 

 body surface. 



Table V. — Coefficients of correlation with live weight 



Lying 24 hours . . . 

 Standing 12 hours 

 Standing 24 hours 



Basal katabolism per 

 square meter. 



o- 5375±0- 0923 

 • 3666± . 1124 

 .2405± . 1223 



9000 



MAINTENANCE REQUIREMENT OF CATTLE 



In studying the results of feeding experiments it is often desirable to 



be able to estimate the maintenance requirements of animals. As already 



pointed out, this is not fixed 



by the basal katabolism in 



the narrower sense, but 



includes also the energy 



expended in a variety of 



incidental activities, more or 



less variable in amoimt, and 



corresponding to what we 



have here called the 24-hour 



basal katabolism. Our re- 

 sults demonstrate anew the 



marked influence of stand- 

 ing upon the metabolism of 

 cattle, the mean 24-hour 

 basal katabolism lying, 

 standing 12 hours and 

 standing 24 hours being 

 in the proportion of 



100:121:141, the difference 

 largely exceeding the prob- 

 able errors. For expressing 

 the actual maintenance re- 

 quirement we have custom- 

 arily employed the results computed for 12 hours' standing, although 

 this choice is purely arbitrary and any other ratio of standing to lying 

 could be computed from the data of Table IV. If our previous practice 

 be followed, the 24-hour basal katabolism — that is, the maintenance 

 requirement — of an unfattened steer weighing 1,000 pounds (453.6 

 kgm.), equivalent to 403.7 kgm. empty weight, and standing half the 

 time may be calculated by multiplying the basal katabolism per square 



?00 aOO 400"" 500 600 



LIVE WEIGHT (KILOGRAMS) 

 Fig. 3.— Graph of the basal katabolism of cattle per 24 hours' 

 standing. 



