Effect of Supplementing Common Reed (Phragmites australis) with Urea on Intake, Apparent Digestibility and Blood Metabolites of Baluchi Sheep
الموضوعات :
ا. مختارپور
1
(پژوهشکده دام های خاص، پژوهشگاه دانشگاه زابل، زابل، ایران)
م. جهان تیغ
2
(Department of Clinical Science, Faculty of Veterinary Medicine, University of Zabol, Zabol, Iran)
الکلمات المفتاحية: Sheep, Urea, common reed,
ملخص المقالة :
To evaluate the effects of treating or supplementing common reed (Phragmites australis) with 2% urea on intake, nutrient apparent digestibility, and blood metabolites, fifteen Baluchi rams (35.4±2.3 kg body weight) were used in a completely randomized design. Treatments were as follows: 1) common reed, 2) common reed supplemented with 2% urea solution at feeding, and 3) common reed treated with 2% urea solution and stored for 21 d. Results showed that crude protein (CP) content increased with addition or treatment of urea (P<0.05). The contents of dry matter (DM) and nutrients were not affected by urea. The CP intake significantly increased in sheep fed urea whereas intake of DM, organic matter (OM), neutral detergent fiber (NDF), acid detergent fiber (ADF) and estimated energy intake (MJ/d) were not affected by supplementing with urea. Apparent digestibility of CP increased (P<0.05) in urea fed sheep and also a trend (P<0.10) for more DM and NDF digestibilities was observed in sheep fed urea treated common reed compared to control group. Blood serum urea nitrogen (BUN) concentration was higher in sheep fed urea compared with control (P<0.05), however, the other blood metabolites were not affected by supplementing or treating with urea. It can be concluded that with the exception of slight increase in DM and NDF digestibilities, no significant advantage of treating common reed with urea compared with supplementing with urea was observed. However, compared to untreated and un-supplemented common reed, urea at 2% of DM increased feed efficiency and hence can be used in Baluchi sheep diet.
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