xt7h445hcc8s https://exploreuk.uky.edu/dips/xt7h445hcc8s/data/mets.xml   Kentucky Agricultural Experiment Station. 1954 journals 020 English Lexington : Agricultural Experiment Station, University of Kentucky Contact the Special Collections Research Center for information regarding rights and use of this collection. Kentucky Agricultural Experiment Station Progress report (Kentucky Agricultural Experiment Station) n.20 text Progress report (Kentucky Agricultural Experiment Station) n.20 1954 2014 true xt7h445hcc8s section xt7h445hcc8s Progress Report 20 May, 1954
THE VALUE OF A COMBINATION OF ANTIBIOTICS VS. SINGLE ANTIBIOTICS
FOR YOUNG DAIRY CALVES 5
C. A. .Lassiter, T. W. Denton and J. W. Rust
Thirty-two Jersey and Holstein calves (20 Jerseys and 12 Holsteins) 2 to 3 W
days old were raised on a limited milk—starter—hay system to evaluate a combination
of aureomycin and terramycin versus the single antibiotics for young dairy calves.
Milk was fed at the daily rate of 8 per cent of body weight for the first 21 days of
life; thereafter, the amount of milk fed was gradually reduced until the calves were
completely off of milk at 49 days of age. ·
The calves had all they wanted to eat of an excellent quality alfalfa hay, and
one of the four calf starters shown in table l was fed up to a maximum of 4 pound
daily beginning at 1 week of age. The antibiotic feeding supplements were fed at a
rate to furnish 75 milligrams of crystalline antibiotic per calf daily for the first 49
days. The supplements were placed in the starters thereafter.
The results are given in the following tables.
Table 1.
Composition of Experimental Starters
l 2 3 4
(1b1 (lb) (lb)  )
Soybean oil meal ·L~¢— 50 50 50 50
Crimped oats ··;··- 120 120 120 120
Ground yellow corn A - - 80 80 80 80
Wheat Bran . · · A · · 50 50 50 50
Distillers solub1es(72% corn) 100 100 100 100
Steamed bonemeal ···· 5 5 5 5
Vitamin A and D feed (grams) 200 200 200 200
Aurofac ZA (grams/lb.) · I — 3 - 1. 5
TM- (grams/lb.) · · · - - - 2.5 1.25
Analysis in percent .—
Dry matter eis·»·· 92.8 91.3 91.8 91.9
Crude protein -··s·Ve 21.5 20.6 21.7 21.8
Ether extract . ..... 5.0 5.0 5.0 5.0
Crude fiber. . . . . . 6.0 5.9 5. 8 6.0
Nitrogen—free extract . . . 53.1 53.0 52.1 51. 8
. Ash. . . . . . . 7.2 6.8 7.2 7.3
Kentucky Agricultural Experiment Station
University of Kentucky
Lexington

 Table 2.
Effect of Antibiotics Upon the Daily Rate of Gain, Skeletal Growth
and the Incidence of Scours in Young Dairy Calves
 
Group Average Height Heart Incidence
_ _ Daily g in at withers girth of  co rs p
(lb. IZ 1 (in. (in.) days group)
O. ll »
1 (Basal) 1.03 p _ 4. 53 7. 66 6
2 (Basal plus Aurofac) 1.18/0.11 4; 97 9. O3 13 ·‘
3 (Basal plus TM-5) 1.15/ O. O9 4_.(Dg 7. 22 8
4 (Basal plus Aurofac 1.13/ 0.11 4. 78 9.06 5 .
plus TM—5) _
 
1 Standard error of the mean
None of the differences in growth rate were statistically significant. A
Table 3.
Summary of Feed Consumption and Utilization Data
Average total consumption
Group Milk Starter Hay Feed/gain
zlbl (lb) Zibj (1b)
l 202.0 150.0 54.8 2.67
2 195.8 163.8 . 62.7 2.53
3 206.6 164.5 51.4 2.51
4 187.5 153.6 69.2 2.59