A17. Feeding and Nutrition of Ewes and Rams

Question 1

Yearly cycle

Optimal: BCS 3;

Answer 1

Sheep are seasonally polyoestrous.
• Duration of pregnancy: 136-155 days
• Duration of lactation: 3-4 months

Question 2

protein, energy,

Answer 2

Maintenance requirement („extended” requirement in sheeps):

Question 3

DMI

Answer 3

Dry matter intake:
2.5-6.0 kg/100 kg BW (in average 3-5 kg);
(2-3% of BW)

Question 4

Energy requirement: maintanence

wool, or gain

Answer 4

NEm, MJ = 0.31 MJ × W0.75 for adult ewes grazed
(in stall: 0.2846 MJ × W 0.75). (lower, less activity)

Energy demand of lambs and growing sheep: NEm +NEg

Question 5

Protein

Answer 5

Maintenance: MP , g = 2.60 × W0.75 (daily protein requirement

Extended requirement  (maintenance + wool production)  (from microbial +UDP)
	Wool production: protein quantity produced daily/0.4

Question 6

And fibre requirements, flushing, feeds.)

Answer 6

• Ca = 4.4 g per 100 kg BW,
• P = 3.4 g per 100 kg BW.
• Na: 2.0 g per kg feed (acid-alkali balance; milk production, plants rich of potassium)
• S: wool production → keratine, cystine (methionine);