ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS
Askar, A., Rahman, K., Taie, H., Kewan, K., Badawy, H., Fayed, F. (2020). ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS. EKB Journal Management System, 4(6), 87-102. doi: 10.21608/mjapfp.2020.171542
A.R. Askar; K.M. Abdel- Rahman; H.T. Taie; K.Z. Kewan; H.S. Badawy; F.F. Fayed. "ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS". EKB Journal Management System, 4, 6, 2020, 87-102. doi: 10.21608/mjapfp.2020.171542
Askar, A., Rahman, K., Taie, H., Kewan, K., Badawy, H., Fayed, F. (2020). 'ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS', EKB Journal Management System, 4(6), pp. 87-102. doi: 10.21608/mjapfp.2020.171542
Askar, A., Rahman, K., Taie, H., Kewan, K., Badawy, H., Fayed, F. ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS. EKB Journal Management System, 2020; 4(6): 87-102. doi: 10.21608/mjapfp.2020.171542

ENERGY AND NITROGEN BALANCES AS AFFECTED BY ANIMAL SPECIES AND INTAKE LEVEL UNDER DESERT CONDITIONS

Menoufia Journal of Animal Poultry and Fish Production
Article 1, Volume 4, Issue 6, October 2020, Page 87-102  XML PDF (462.41 K)
Document Type: Original Article
DOI: 10.21608/mjapfp.2020.171542
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Authors
A.R. Askar1; K.M. Abdel- Rahman2; H.T. Taie2; K.Z. Kewan1; H.S. Badawy1; F.F. Fayed1
1Department of Animal and Poultry Nutrition, Desert Research Center, P.O. BOX 11753, Egypt
2Department of Animal Production, Faculty of Agriculture, Menoufia University, Egypt
Abstract
Thirty-two adult dry females, age 4-5 yrs.; Balady goats (n= 16 and average body weight 31.11 ± 1.63 kg) and Barki sheep (n= 16 and average body weight 34.53 ±1.56 kg) were used to study effects of long-term restricted feeding regime on body weight changes and balance of energy and protein. Animals of each species were allocated to two levels of feed intake; control feeding treatment (CON) where animals were fed a diet at a level of feeding to meet approximately the metabolizable energy for maintenance requirement (MEm), while those on the other dietary treatment was fed almost 50% of these quantities on a BW basis, termed as the restricted treatment (restricted; RES). Alfalfa hay and concentrate feed mixture (50:50% as DM basis) were given based on requirement recommendations. The results could be summarized as follows:
The ADG was not affected (P<0.05) by animal species (BG vs. SH), however, it was affected (P<0.01) by feed intake level where the RES animal group showed a negative ADG (-65.6 g/d) compared with the CON group that achieved positive ADG (36.4 g/d).
Both of SH and BG had similar negative energy balance (EB) values (67.0 vs. 61.4 KJ/ kg0.75/d, for BG and SH respectively).
Nitrogen balance (NB) was greater (P<0.01) for SH (107.64 mg/kg0.75/d ) vs. BG (89.47 mg/kg0.75/d) and was greater (P<0.01) for animals fed on CON intake (251.47 vs. 208.55 mg/kg0.75/d, respectively) than those fed on RES intake (-36.18 vs. -29.62 mg/kg0.75/d, respectively), which gave a negative NB.
It could be concluded that with desert conditions, sheep may have an advantage in a decreasing Metabolizable energy for maintenance (MEm) requirement and reduction in heat production of a magnitude adequate to maintain body weight. There is a similar rate of using the energy between sheep and goats with moderate or limited nutrition planes
Keywords
Barki sheep; Balady goats; Feed intake level; digestibility; Energy balance; Nitrogen balance
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