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Effect of additive of Selenium and Iodine during pregnancy and lactation on milk yield, butterfat and milk protein secretion at ewes of Karakachan breed

Effect of additive of Selenium and Iodine during pregnancy and lactation on milk yield, butterfat and milk protein secretion at ewes of Karakachan breed

Zhivotnov"dni Nauki 1998(Suppl 2): 49-52

Influence of complex additive of Selenium (Se) and Iodine (J) was studied during pregnancy (4-5 month) and beginning of lactation (1-56 day) at 24 ewes of Karakachan breed split into two groups Ewes of control groups received per os an additive of 0.25 mg Se/day and 0.10 mg J/day as NaHSeO3 and KJ during the whole experimental period (116 days). Complete ration mixture contained 0.074 mg Se/kg dry matter (DM) and 0.123 mg J/kg DM. It was found Se-J additive influenced positively milk yield of ewes during all subperiods. Deficiency ewes produced average daily 14% less milk (P<0.01) compared to supplemented animals. Low degree of significance (P<0.05) was determined between the two groups for average daily butterfat yield due to higher fat percentage in the milk of ewes from deficiency group. Additive of Se and J affected highly significantly (P<0.001) average daily milk protein secretion (15%).

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