Table 10.

Lactation performance of dairy ewes ¹ fed diets with varying levels of rumen degraded (RDP) and undegraded (RUP) protein

	% RDP:%RUP
Trait	12:6	14:4	12:4	SEM
Test day milk yield, kg	2.05a	1.80b	1.79b	0.07
Milk fat,%	6.13	6.37	6.18	0.25
Milk protein,%	4.74	4.95	4.80	0.14
Milk urea nitrogen, mg/dL	26.3a,b	27.4a	23.4b	1.4

¹Third lactation crossbred ewes of East Friesian and Lacaune breeding, n = 6 pens of 3 ewes each per treatment in a Latin square design.

^a,bMeans within a row with no superscript in common are different (P < 0.05).