RELATION OF VITAMIN-D TO CALCIUM AND PHOSPHORUS RETENTION IN CATTLE 189

                                                                            TABLE IV

The results of mineral balance trials showing the calcium and phosphorus retention of calves, receiving beet pulp as
                                    roughage, with and without mineral and vitamin-D supplements

Animal

Age at
Begin-
ning

Weight

Supplements

Blood Plasma

Mineral Balance (10-Day Period)

Mineral

Vitamin-D

Total
Ca

Inorganic
P

Ca

P

Intake

Outgo

Balance

Intake

Outgo

Balance

days

lbs.

mgm. per
100 c.c.

mgm. per
100 cc.

gms.

gms.

gms.

gms.

gms.

gms.

E-201 . .

...

527

None . .

None . .

6.42

3.56

71.7

57.2

+ 14.5

83.8

72.8

+11.0

E-201] . .

...

539

None . .

Viosterol1 .

10.09

6.87

96.4

28.2

+ 68.2

83.8

57.0

+26.8

E-201 . .

...

775

None . .

None2 . .

6.12

5.05

85.8

79.7

+6.1

122.2

116.5

+5.7

E-201 . .

...

786

None . .

Viosterol3 .

9.29

7.94

102.9

50.1

+52.8

119.8

96.4

+ 23.4

E-185 . .

475

485

CaCO3

None . .

8.41

3.13

271.2

292.0

—20.8

38.5

48.8

—10.3

E-185 . .

538

461

CaCO2

Viosterol4 .

11.15

4.98

240.4

184.0

+56.4

38.9

21.5

+17.4

E-194] . .

430

575

CaCO3 . .

None . .

8.30

3.40

356.2

335.5

+ 20.7

48.8

45.6

+3.2

E-194 . .

462

625

CaCO3 . .

Viosterol5 .

11.11

6.41

456.0

333.0

+122.4

72.1

32.3

+39.8

            1 Started feeding 5 cc. of viosterol daily 33 days previous to this trial.
            2 Viosterol feeding discontinued approximately 3½ months previous to this trial.
            3 Started feeding 5 cc. of viosterol daily 40 days previous to this trial.
            4 Started feeding 5 cc. of viosterol daily 53 days previous to this trial.
            5 Started feeding 5 cc. of viosterol daily 23 days previous to this trial.