Environmental effect on nitrogen metabolism and its effect on protein requirement of Egyptian oasis sheep
Abstract: The effect of season on nitrogen metabolism and protein requirements for maintenance of Egyptian Oasis sheep was determined through two nitrogen metabolism trials carried out in summer and in winter using the same four Egyptian Frafra rams. They were fed isocaloric ration (72 TDN) to cover the maintenance energy requirement at the level of 2.0 % DM of live body weight, however with different crude protein content (6.13, 7.93, 9.70 and 15.07 % CP for R1, R2, R3 and R4 rations respectively). Temperature humidity index value (THI), plasma total protein (TP), albumin (ALB), urea (UR), cereatinine (CR) and plasma globulin (GLB) were determined. Nitrogen balance was calculated by the difference between nitrogen intake and nitrogen outgo in feces and urine. Crude protein and ether extract digestibility values were significantly higher in winter than in summer, while increasing dietary protein significantly improved the digestibility of CP and crude fiber (CF). Nitrogen balance was significantly higher in summer than in winter. Total water intake was significantly higher in summer and increasing dietary protein level increased total water intake. Season and level of dietary protein significantly insignificant affected blood nitrogen metabolites. The study showed that the protein requirement for maintenance of Egyptian Oasis sheep was higher during winter than in summer by 31.0 %. It was found to be 3.83 g CP/ kgWO.75 during winter season, and 2.57 g CP/ kgWO.75 during summer.
Publication year 2008
Pages 675-682
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City الاسكندرية
serial title 9th International Conference on Drylamd Development Sustainable Development in Drylands- Meeting the Challenge of Global Climate Change
Author(s) from ARC
Agris Categories Animal physiology - Nutrition
AGROVOC
TERMS		 Nitrogen metabolism. Nutritional requirements. Proteins. Seasons. Sheep.
Publication Type Conference/Workshop
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