Determination of Energy and Protein Requirements of Sheep in Indonesia using a Meta-analytical Approach
Abstract: The objective of
this study was to determine energy and protein requirements, for both
maintenance and gain, of sheep in Indonesia by using a meta-analysis method. A
database was developed from various in vivo experiments involving sheep as the
experimental animals in which energy intake, protein intake and average daily
weight gain (ADG) were reported. A total of 38 articles consisting of 137 data
points were integrated into the database. Different breeds (Priangan,
fat-tailed and local) and sexes (male and female) were specified in the
database. Maintenance and gain requirements of dry matter, energy and protein
were determined by regressing ADG with dry matter intake (DMI), total
digestible nutrient intake (TDNI) and crude protein intake (CPI), respectively.
An intercept (where ADG= 0 g/kg MBW/d) and a slope (required nutrient intake
per unit ADG) were taken as maintenance and gain requirements, respectively.
Results revealed that all sheep breeds had similar energy requirement for
maintenance (TDNm). Energy requirement for gain (TDNg) of Priangan breed was
lower than other breeds; the breed required 0.860 g TDN for 1 g ADG. Fat-tailed
and local breeds required 1.22 and 2.75 g TDN for 1 g ADG, respectively. All
breeds also revealed relatively similar protein requirement for maintenance
(CPm), i.e. 6.27-6.47 g/kg MBW/d. Priangan breed required less CP for 1 g ADG
(CPg), i.e. 0.295 g. Requirements of CPg for fat-tailed and local breeds were
0.336 and 0.497 g/g ADG, respectively. It was concluded that each sheep breed
in Indonesia had specific TDN and CP requirements for gain, but similar
requirements for maintenance.
Keywords: nutrient requirement;
energy; protein; sheep; meta-analysis
Author: A. Jayanegara, M.
Ridla, D. A. Astuti, K. G. Wiryawan, E. B. Laconi, Nahrowi
Journal Code: jppeternakangg170063