hrvatski

Aktivnost enzima i hormona štitnjače u krvi za procjenu opskrbljenosti ovaca selenom

The aim of this investigation is to determine whether the activity of enzymes and thyroid hormones in the blood of sheep and lamb can be used as a reliable criterion in assessing their supply with selenium. Research was conducted with 30 nongravid sheep and 30 lamb Dubrovnik sheep, during the summer season of nutrition. Control group of sheep consumed pasture, hay and forage mixture (200 g / day), while the control group of lamb dishes mixture ad libitum. In the experimental group of sheep and lamb in a mixture of fodder has been added inorganic (sodium selenite) or organic source (Sel-San) selenium in the amount of 0.03% dry matter. It is not found significant deviation in the activities of most enzymes in the blood of sheep and lamb, depending on the group, but it is visible trend of increasing activity of enzymes in the control group compared to the experimental group. Statistically significant (P<0.01) higher activity of GSH-PX in full blood was found in sheep and lamb that are consumed fodder mixture with the addition of organic selenium in relation to the groups that were fed fodder mixture of inorganic selenium and control group. It is determined statistically significant (P< 0.05) lower activity of T4 in the blood of sheep that are consumed added selenium in relation to the control group of sheep. These changes in activity GSH-PX suggest better use of organic in comparison to the inorganic form of selenium. Significantly higher (P<0.05) activity of ALT and LDH (on upper limit physiological values) was found in the blood of the control group lamb in relation to the group that had consumed the mixture with the addition of organic selenium. Mentioned changes activity of enzymes and thyroid hormones in the blood of sheep and lamb show the justification of adding selenium, especially organic selenium in food lamb, with regard to increased need for selenium in many metabolic processes that follow their intensive growth. The activity of enzymes and thyroid hormones in the blood of sheep and lamb can be taken as a reliable criterion in assessing their supply with selenium.

ovce ; janjad ; selen ; enzimi ; hormoni štitnjače ; krv

Rad je kao poster prezentiran na skupu XVI. Međunarodno savjetovanje Krmiva 2009, održanom od 01.-03.06. 2009., Opatija, Hrvatska.