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Effect of the nature of the nitrogen source on the urea content of milk from the Sicilo–Sarde dairy ewes

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Author(s): Houcine Selmi, | Boulbaba Rekik | Hamadi Rouissi

Journal: Research Opinions in Animal & Veterinary Sciences
ISSN 2221-1896

Volume: 1;
Issue: 3;
Start page: 133;
Date: 2011;
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Keywords: Milk | Nitrogen | Source | Sicilo-Sarde Dairy Ewes | Urea

ABSTRACT
Twenty (20) Sicilo-Sarde ewes were divided into two homogeneous batches according to age (5.3±1.25 years and 5.7±1.15 years), litter size (1.1±0.31), lactation number (4.3±1.25 and 4.6±0.96) and weight (33.83±5.63 and 33.95±5.58 kg). Ewes housed in two identical boxes with an area of 10.14 m2 each (1.01 m2/brebis) received a ration of common base (oat hay) at 1.5 kg DM/ewe/day supplemented per 500g/ewe/day of a standard concentrate diet composed of corn, barley, wheat bran, soybean and vitamins and minerals supplement sheep (control group: CC), and a concentrated feed composed of local white sorghum, horse beans and a sheep vitamin and mineral supplement (experimental group: CS). A weekly milk recording took place to determine the concentration of urea in milk during the ten (10) weeks of the first phase of trafficking. The average grade of urea was 53.5±8.76 for the lot and 35CC, 5±3.4 mg/dl for the outcome of the sheep milk fed the CS with significant difference (p
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