. 2018 Summer;19(3):225–228.

Table 3.

Milk yield, milk composition and plasma concentrations of some blood parameters of experimental treatments

Parameters ¹	Days post calving	Treatments ²				SEM ³	P-value
Parameters ¹	Days post calving	Control	LG	MG	HG	SEM ³	P-value
DMI (kg/day)	0	7.5	7.7	7.5	7.4	0.95	0.62
	+7	10.0^b	13.3^a ^b	14.0^a ^b	15.8^a	1.48	0.02
	+14	13.0^b	16.4^a ^b	18.5^a	19.6^a	1.31	0.01
	+21	18.0^b	20.0^a ^b	21.7^a	21.1^a	0.81	0.04
Milk yield (kg/day)	0	14.5	13.9	14.4	14.0	1.17	0.81
	+7	19.5^b	22.5^a ^b	23.5^a ^b	24.1^a	1.52	0.01
	+14	31.5^b	32.7ab	33.3^a ^b	34.5^a	0.95	0.02
	+21	35.0^b	38.0ab	38.5^a	39.2^a	1.04	0.01
Milk fat (%)	+7	3.68	3.49	3.61	3.72	0.32	0.58
	+14	3.66	3.43	3.55	3.72	0.33	0.62
	+21	3.54	3.42	3.49	3.62	0.24	0.74
Milk protein (%)	+7	3.30	3.31	3.38	3.36	0.07	0.47
	+14	3.28	3.24	3.38	3.35	0.08	0.36
	+21	3.28	3.29	3.41	3.38	0.06	0.22
SCC (*10³/ml)	+14	231^a	145^b	139^b	141^b	46.8	0.03
	+21	482^a	161^b	184^b	178^b	58.9	0.02
Blood metabolites
Glucose (mg/dl)	0	46.50	46.00	45.60	46.20	1.02	0.63
	+7	47.40^b	51.32^a ^b	53.53^a	54.30^a	1.34	0.02
	+14	48.00^b	53.52^a	55.86^a	56.84^a	1.51	0.01
	+21	48.80^c	55.00^b	59.20^a ^b	60.50^a	1.68	<0.01
Total protein (g/dl)	0	5.66	5.77	5.45	5.52	0.29	0.78
	+7	5.20^b	5.81^a ^b	5.93^a ^b	6.21^a	0.21	0.03
	+14	5.11^c	5.84^b	6.82^a	6.87^a	0.19	0.01
	+21	5.02^c	5.98^b	7.10^a	7.20^a	0.17	<0.01
Albumin (g/dl)	0	3.56	3.47	3.54	3.44	0.08	0.34
	+7	3.38^b	3.46^b	3.85^a	3.87^a	0.05	<0.01
	+14	3.34^b	3.40^b	3.67^a	3.82^a	0.07	0.02
	+21	3.54^b	3.62^b	3.96^a	3.98^a	0.06	<0.01
Urea-N (mg/dl)	0	10.20	10.70	10.52	10.10	0.42	0.49
	+7	10.30	11.43	11.83	12.24	0.68	0.24
	+14	10.62	12.11	12.74	13.43	1.02	0.18
	+21	10.94	13.23	13.94	14.72	1.31	0.12
AST (U/L)	0	110.0	107.2	114.7	113.1	1.72	0.49
	+7	114.2^a	98.3^b	97.5^b	96.4^b	3.57	0.01
	+14	121.7^a	89.4^b	84.1^b	82.8^b	4.91	<0.01
	+21	132.5^a	82.1^b	73.3^b	71.3^b	6.32	<0.01
BHBA (mmol/L)	+21	1.22^a	0.85^b	0.78^b	0.75^b	0.083	<0.01
NEFA (mmol/L)	+21	0.93^a	0.62^b	0.51^b	0.49^b	0.048	<0.01

DMI: Dry matter intake, SCC: Somatic cell count, AST: Aspartate amino transferase, BHBA: β-Hydoxybutyrate, NEFA: Non-esterified fatty acids.

Control: Cows fed basal diet; LG: Low Gln, cows fed basal diet supplemented with 150 g protected Gln/d; MG: Medium Gln, cows fed basal diet supplemented with 250 g protected Gln/d; HG: High Gln, cows fed basal diet supplemented with 350 g protected Gln/d.

SEM: Stand error of means.

^{a, b, c}

Means within a row with different superscripts differ (P<0.05)