2007•DOAJ (DOAJ: Directory of Open Access Journals)Requires access
EFFECT OF ZINC SOURCE AND SUPPLEMENTATION LEVEL ON PRODUCTIVE INDICES IN BROILER CHICKENS
Calin Julean, Dan Drinceanu, Ioan Luca, Lavinia Ştef, Ducu Sandu Stef, C. Medrea
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Abstract
In this experiment we have studied the effect of zinc provided from concentrated chelated glasses and inorganic substance (ZnO) on nutritive and bioproductive indices in broiler chickens. The experiment was carried out on 120 broiler chickens divided into four experimental groups (CL, EL1, EL2 and EL3), with 30 broiler chickens in each experimental lot. The used hybrid was Ross 308. Zinc was provided by concentrated phosphatic glass with zinc (G 300) at following levels: at CL, 20 mg Zn, at EL1, 10 mg Zn, at EL2 40 mg Zn. At EL3 20 mg Zn was provided by inorganic substance (Zn O). Zinc assurance by G 300, at 20 mg/kg combined feed, determined superior bioproductive indices comparative with zinc assurance by Zn O at the same level.