. 2012 Jan 4;8:1. doi: 10.1186/1746-6148-8-1

Table 6.

Effect of concentrate supplementation for 26 d pre-weaning on plasma metabolites in abruptly weaned and housed beef calves


		Days post-weaning					P-values¹

Metabolite		0	2	7	14	Pooled s.e.m.	T	S	T×S

Total protein, g/L	CS	70.3^a	73.9^{b, x}	72.8^a	70.6^a	0.98	*	†	NS
	NCS	68.3^a	70.9^b.y	72.0^b	67.6^a
Albumin, g/L	CS	34.0^a	33.9^a	35.4^a	31.6^b	0.45	†	*	NS
	NCS	33.2^a	33.4^a	33.4^a	31.0^b
Globulin, g/L	CS	36.6^a	38.9^{b, x}	37.7^a	38.9^b	0.80	NS	**	*
	NCS	35.1^a	37.6^{b, y}	38.4^b	36.6^a
Creatine kinase,U/L	CS	295	304	359	317	42.7	NS	NS	NS
	NCS	307	297	324	350
Urea, mmol/L	CS	4.2^a	3.1^b	3.1^b	2.5^c	0.17	NS	***	NS
	NCS	4.3^a	3.3^b	3.0^b	2.5^c
Glucose, mmol/L	CS	4.5	4.6	4.3	4.3	0.08	NS	NS	NS
	NCS	4.5	4.8	4.3	4.3
βHB², mmol/L	CS	0.19^a	0.27^b	0.25^a	0.30^b	0.014	NS	*	NS
	NCS	0.17^a	0.24^b	0.23^a	0.28^c
NEFA³, mmol/L	CS	0.17	0.24	0.17	0.13	0.023	NS	*	NS
	NCS	0.13^a	0.33^b	0.20^ab	0.09^a

¹Levels of significance: NS = P > 0.05, † = P = 0.06, * = P < 0.05, ** = P < 0.01, *** = P < 0.001. ^{a, b, c}Within a row, least squares means without a common superscript differ (P <0.05). ^{x, y}Within a column (day) for each variable, least squares means without a common superscript differ (P <0.05). T = treatment, S = sampling time, T × S = treatment × sampling time interaction. ²βHB = β-hydroxybutyrate, ³NEFA = non-esterified fatty acids.

CS = concentrate supplement prior to abrupt weaning (n = 10), NCS = no concentrate supplement prior to abrupt weaning (n = 10).