. 2022 Aug 4;9:954675. doi: 10.3389/fvets.2022.954675

Table 5.

Effects of forage type and guanidine acetic acid (GAA) addition on blood metabolites in feedlotting lambs at different feeding stages (stage 1, 60 day; stage 2, 120 day).

Items	Forage	GAA addition			S.E.M	P -value
		Control	UGAA	CGAA		Forage	GAA	Interaction
Stage 1 (60 d)
TP (g/L)	OH	63.22^b	71.17^a	69.26^a	0.907	0.114	<0.001	0.136
	OHWS	63.57^b	67.90^a	68.58^a
ALB (g/L)	OH	38.07	38.04	38.12	0.846	0.974	0.316	0.230
	OHWS	38.14	38.49	39.07
urea N (mmol/L)	OH	13.09^a	11.67^b	11.82^b	0.397	0.371	<0.001	0.749
	OHWS	13.08^a	11.05^b	11.57^b
TG (mmol/L)	OH	0.44^a	0.40^b	0.40^b	0.009	0.672	<0.001	0.938
	OHWS	0.44^a	0.41^b	0.41^b
glucose (mmol/L)	OH	4.90^a	4.50^b	4.30^b	0.282	0.745	<0.001	0.453
	OHWS	4.92^a	4.36^b	4.36^b
IGF-1 (ng/ml)	OH	42.34^b	44.13^a	44.38^a	0.498	0.915	0.004	0.778
	OHWS	42.70	44.01	43.99
Stage 2 (120 d)
TP (g/L)	OH	65.03^b	67.68^a	67.18^a	0.783	0.697	0.002	0.585
	OHWS	65.02^b	67.27^a	68.35^a
ALB (g/L)	OH	39.16	41.10	40.90	1.096	0.178	0.373	0.826
	OHWS	38.57	39.14	39.75
urea N (mmol/L)	OH	11.43^a	9.84^b	9.65^b	0.453	0.267	0.005	0.573
	OHWS	10.51	9.90	9.25
TG (mmol/L)	OH	0.50^a	0.42^b	0.43^b	0.017	0.052	0.004	0.176
	OHWS	0.44^a	0.43^ab	0.40^b
Glucose (mmol/L)	OH	4.61^a	4.06^b	4.38^b	0.227	0.850	0.018	0.450
	OHWS	4.83^a	4.10^b	4.03^b
IGF-1 (ng/ml)	OH	40.18^b	44.20^a	44.18^a	0.791	0.624	<0.001	0.993
	OHWS	40.60^b	44.43^a	44.49^a

OH, the rations with the forage type of oaten hay; OHWS, the rations with the forage type of oaten hay plus wheat silage; UGAA, the rations added with 1 g/kg of uncoated GAA product; the rations added with 1 g/kg of coated GAA product.

ALB, albumin; IGF-1, insulin-like growth factor 1; TG, triglycerides; TP, total protein; S.E.M, standard error of least square means.

^{a, b}

In the same row with different superscript letters indicates the significantly different values of P < 0.05.