Effect of supplementation of Oregano or nigella sativa seeds to diets of lactating Zaraibi goats on milk yield and some physiological functions during summer season [electronic resource].

Includes references.

Twenty one Zaraibi goats, in their 3rd lactation averaging three years of age and 38 :!: 3 kg weight were divided into three groups. The experiment continued for 25 weeks from May until October to examine the effect of Oregano /Origanum vulgare (Or) or Nigel/a /Nigella sativa seeds (NSS) as nutritive supplement under hot conditions on milk yield, milk composition, milk physical and chemical properties of curd (the rennet coagulation time "RCT"; cured tension "CT" and whey syneresis), blood Ht%, Hg, REC's and WEC's and to estimate immunity, kidney functions, energy metabolites cholesterol and heart healthy indicators in plasma and some blood minerals and blood serum liver enzymes. Does were fed the control ration without additives in the 1st group (Control) or with crushed 100 mg / kg live body weight of does from OV or NSS in the rand 3rd groups, respectively. The control ration consisted of 60% concentrate feed mixture (CFM) plus 40% rice straw (RS) on DM basis. The results showed that supplementing (suppl.) diets of lactating Zaraibi goats during the summer season with OV and NSS improved (P<0.05) significantly milk yield by 32.1% and 42.0 %, respectively without any adverse effect on milk quality. Milk total, solids, protein, fat, lactose and ash percentages were not affected (P<0.05) significantly by suppl. with NSS or OV. The rennet coagulation time, CT and whey syneresis of goats milk raw or pasteurized were not affected by NSS or OV additives. Supplemented diets of lactating goats increased (P<0.05) significantly the Hg values and REC'S count, respectively, by 21.3% and 25.1% for OV and 34.4 and 25.3% for NSS. Diets supplemented with NSS increased significantly blood concentrations of Na, K. Ca, P and Zn of lactating goats. Liver and kidney functions were not affected negatively by either OV or NSS. Moreover. suppl. improved the immunity function i.e. total protein and globulin concentrations and decreased total cholesterol as well as glucose level in the blood plasma.

Summary in Arabic.

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