Influence of Selenium and Iodine Supplementation on the Daily Milk, Fat and Protein Production During the Grazing Period of Sheep

Ts. ODJAKOVA

Complex Experimental Station, BG-4700 Smoljan, Bulgaria

Abstract

ODJAKOVA, Ts., 1999. Influence of selenium and iodine supplementation on the daily milk, fat and protein production during the grazing period of sheep. Bul. J. Agric. Sci., 5: 901-905

The supplementation of the lactating sheep during the grazing period with 0.26 mg Se/day as NaHSeO3 and 0.10 mg I/day as KI had a positive effect on the milk yield and the milk composition. The unsupplemented ewe's produced about 11% less milk with higher percentage of fat an lower percentage of protein. The daily fat and protein production have been negatively influenced. For a normal milk production and milk performance was needed a correction on Se and I offer in the ration of lactating sheep in some endemic region Bulgaria.

Key words: sheep, selenium-iodine deficiency, milk production and composition