اثر سطوح مختلف برگ درخت عناب بر مصرف خوراک، متابولیتهای خون، تولید و ترکیبات شیر بزهای کرکی

Abstract

This Research was conducted to study the effect of different levels of Ziziphus jujube mill foliage on milk yield and composition, blood metabolites (glucose, BUN, triglyceride), dry matter intake and ruminal fermentation. For this purpose 27 heads multiparous southern Khorasan cross-bred goats (DIM of 60±12 and average BW of 28.59±3.18kg) were assigned to three groups as randomized complete design and housed in individual stalls. Treatments were: 1. without jujube leaves, 2. 7.5% jujube leaves/DM of diet and 3. 15% jujube leaves/DM of diet. The Goats were fed TMR diets twice a day (800 and 2000h) and water was available at all the times. For determination the milk composition, ruminal pH, NH3-N and blood parameters, samples were taken in days 30 and 60 and dry matter intake (DMI) and milk yield was measured daily. Dry matter intake between experimental treatments were significant difference (P<0.05). Ruminal fluid pH and NH3-N were not significantly different among treatments. Milk yield were higher for treatment containing 7.5% jujube leaves as compared to other groups, and between experimental treatments there was significant difference (P<0.05). There was no significant difference on milk compositions. The concentrations of glucose and blood urea were significantly different among treatments. It is concluded, using of Ziziphus jujube mill foliage as section of diet forage had positive effect on milk production and no effects on milk composition.