Search

In wintertime 7 nonpregnant cows (3 nonlactating and 4 milk secreting less than 3 liter/day) and 3 heifers were treated:day 1 cloprostenol (530 microgram); day 2 progesterone capronate (0,25/Kg); days 3 to 5 progesterone (0,25 mg/Kg)+ estradiol valerianate (0,01 mg/Kg) and reserpine (0,01 mg/Kg); days 6 to 8 progesterone (0,25 mg/Kg) + estradiol (0,2 mg/Kg) and reserpine (0,01 mg/Kg); day 9 betametasone acetate (0,2 mg/Kg) and phosphate (0,55 mg/Kg); days 9 to 16 estradiol (0,0075 mg/Kg). 9 days later the treatment started again. In all the period (5/12-25/2) the animals where machine milked. 2 lactating nonpregnant cows where kept as control. The milk secretion started in nonlactating animals but the peak daily milk yield was 3 liter about only. In lactating animals the yield no increased. The second treatment (and the first in lactating cows) induced secreting less milk with more fat and protein. The low milk yields was associated to a season's negative effect.

In 8 nonpregnant, nonlactating sheep the milk secretion was hormone-induced injecting: day 1 estradiol (2 mg), day 2 progesterone (10 mg, days 3 to 8 progesterone (10 mg) and estradiol (1-2 mg), days 9 to 12 estradiol (0,1 mg) and reserpine (1 mg). The estradiol-reserpine were given few more days to 3 sheep. The animals were machine-milked. In a 127 period the yeld was 41,9 - 130,5 liters. The protein and fat content was normal. The least milk production was economically adequate.