Table 2.

Effects of prepartum dietary supplementation of rumen-protected choline at 45 g/d (CHOL45, n = 22), 30 g/d (CHOL30, n = 20), or no supplementation (CON, n = 19) on colostrum yield and quality

Item	LSM			SE	P-value
	CHOL45	CHOL30	CON		Treatment	Parity
Colostrum yield (kg)	5.9a	6.3a	3.4b	0.83	0.01	NS
Fat (%)	4.5	4.6	3.8	0.66	0.29	NS
Protein (%)	11.5	12.0	11.4	0.61	0.76	0.04
Lactose (%)	3.1	3.2	2.9	0.12	0.21	NS
Fat yield (kg)	0.24ab	0.32a	0.15b	0.051	0.01	NS
Protein yield (kg)	0.68a	0.78a	0.38b	0.10	<0.01	NS
Lactose yield (kg)	0.18ab	0.21a	0.10b	0.027	<0.01	NS
SCS1	6.0	5.9	6.9	0.40	0.09	<0.01
Brix (%)	22.3	22.3	23.8	0.83	0.29	<0.01

^a,bWithin a row, means with different superscripts differ (P ≤ 0.05).

¹SCS: log₂(SCC/100,000) + 3.