I.M. Pop


EFFECTS INDUCED BY A SOURCE OF ORGANIC SELENIUM AND E VITAMIN USAGE IN DAIRY CATTLE FEEDING

I.M. Pop, Cristina Radu-Rusu, D. Simeanu, Cecilia Pop, N. Fleancu

Abstract
The study aimed to establish the effects given by the feed supplementation of dairy cattle having Se deficiency, with a product containing organic selenium (selenite yeast) and E vitamin. Thus, two experimental groups have been set up (LC and LE), each of the comprising 10 BNR lactating cows. Besides LC group cows diet, every animal from LE group received, through daily ration, a dose of 4g Se and 500 I.U. of E vitamin, throughout a period of 8 months. Studied traits were represented by: selenium content in milk, blood serum, hair as well as the activity of gluthatione peroxidase, as an indicator of the antioxidative status. Analysis of acquired data at certain moments - 1, 2, 4, 7 and 8 months after study onset revealed that Se slowly and progressively accumulated into the body of animals belonging to LE group, compared to those in LM treatment. Since the Se supplementation has been arrested, the values for the studied microelement were double in blood serum and milk, comparing with those detected in control group (blood serum: 0.026 ppm Se in LE group vs. 0.013 ppm Se in LM group; milk: 0.018 ppm Se in LE group vs. 0.008 ppm Se in LM group). Glutathione peroxidase activity, as detected in blood samples, was higher in LE group, compared to the control one (10.075 µmol/ml vs. 4.069 µmol/ml, distinguished significant differences), revealing thus an increased antioxidative protection in the dairy cows whose diet was supplemented with organic Se and E vitamin.

Key words: dairy cows, feeding, organic selenium


EFECTELE UTILIZĂRII UNEI SURSE ORGANICE DE SELENIU ŞI VITAMINA E ĪN ALIMENTAŢIA VACILOR DE LAPTE

I.M. Pop, Cristina Radu-Rusu, D. Simeanu, Cecilia Pop, N. Fleancu

Rezumat
Studiul a avut ca scop stabilirea efectelor suplimentarii alimentatiei vacilor de lapte la care s-a evidentiat carenta de Se, cu un preparat pe baza de Se organic (drojdie selenita) si vitamina E. Astfel, s-au alcatuit 2 loturi experimentale (LC si LE), a cāte 10 vaci de lapte din rasa BNR. Fiecare animal din lotul LE a primit īn ratia zilnica de hrana, suplimentar fata de vacile din lotul LC, o doza de 4 g Se si 500 U.I. vit. E, pe o durata de 8 luni. Parametrii urmariti au fost: continutul īn Se din lapte, ser sanguin, par si activitatea glutation-peroxidazei, ca indicator al statusului antioxidativ. Din analiza datelor obtinute īn urma prelevarii probelor biologice la intervalele de 1, 2, 4, 7 si 8 luni de la initierea studiului, s-a constatat ca Se s-a acumulat lent dar progresiv īn organismul animalelor din lotul LE, comparativ cu cele din lotul LM. Dupa īntreruperea administrarii suplimentului de Se, valorile determinate īn serul sanguin si īn lapte pentru acest microelement au fost duble fata de cele de la lotul martor (0,028 ppm Se la lotul LE fata de 0,016 ppm Se īn ser si 0,005 ppm Se īn lapte la lotul LM). Activitatea glutation-peroxidazei din probele de sānge a fost mai intensa la lotul LE fata de lotul martor (6,28 µmol/ml vs. 2,47 µmol/ml, diferente distinct semnificative), relevānd o protectie antioxidanta marita īn cazul suplimentarii cu Se organic si vitamina E a vacilor de lapte.

Cuvinte cheie: vaci de lapte, alimentatie, seleniu organic