Table 5.

Impact of feed level during the last week of gestation on blood biochemical variables of the piglets at birth (n = 8 sows/feed level)

	Feed level (FL), kg/d							Parity (P)			P-value
Item	1.8	2.4	3.1	3.7	4.3	5.0	SEM	Gilt	Sow	SEM	Trt	P	FL × P	Linear	Quadratic	Cubic
Glucose, mmol/L	2.20	2.56	2.55	2.80	2.94	2.48	0.23	2.65	2.53	0.11	0.15	0.59	0.79	0.10	0.08	0.38
Lactate, mmol/L	5.12	5.76	5.72	5.84	5.24	4.64	0.52	5.72	5.05	0.26	0.29	0.09	0.83	0.37	0.05	0.97
pH	7.36	7.34	7.32	7.33	7.35	7.34	0.02	7.35	7.33	0.01	0.34	0.10	0.50	0.66	0.13	0.40
O2, mmol/L	3.50	4.66	4.29	4.19	4.28	3.89	0.28	4.53a	3.74b	0.12	0.09	<0.001	0.28	0.62	0.008	0.11
CO2, mmol/L	29.7	28.1	28.6	29.3	28.9	30.5	1.26	28.8	29.6	0.59	0.60	0.19	0.64	0.48	0.19	0.77
Ca2+, mmol/L	1.42	1.43	1.42	1.44	1.43	1.43	0.02	1.40b	1.45a	0.01	0.93	<0.001	0.12	0.53	0.73	0.66
Na+, mmol/L	137	138	137	138	136	139	0.89	138	137	0.46	0.17	0.09	0.05	0.57	0.82	0.13
K+, mmol/L	4.43	4.54	4.38	4.27	4.58	3.85	0.18	4.25	4.43	0.09	0.06	0.06	0.28	0.05	0.12	0.22
Ca2+(7.4), mmol/L1	1.38	1.39	1.37	1.39	1.41	1.40	0.02	1.37b	1.41a	0.01	0.16	<0.001	0.42	0.10	0.69	0.65
Anion gap, mmol/L	13.1ab	14.1a	13.0ab	11.7b	12.5b	12.8ab	0.78	13.3a	12.4b	0.36	0.03	0.03	0.14	0.15	0.57	0.05
Hemoglobin, mmol/L	6.78	7.19	7.26	6.91	6.87	6.73	0.21	7.18	6.91	0.11	0.12	0.08	0.41	0.53	0.67	0.02
Oxyhemoglobin, %	50.9	62.5	59.8	59.7	62.1	51.9	3.42	62.2a	53.5b	1.71	0.06	<0.001	0.20	0.81	0.002	0.88
Deoxyhemoglobin, %	41.3	35.6	39.3	38.3	36.8	45.8	3.49	36.2b	42.9a	2.01	0.22	0.005	0.87	0.46	0.11	0.64
Oxygen saturation, %	53.1	61.5	59.4	60.9	60.2	52.5	3.79	63.0a	52.8b	1.70	0.11	<0.001	0.22	0.90	0.007	0.92
Hematocrit, %	32.3	34.8	34.3	32.8	32.6	34.9	1.03	34.3a	32.3b	0.53	0.08	0.05	0.19	0.56	0.86	0.004

¹Measured at pH of 7.4.

^a,bMeans within a row with different superscript differ (P < 0.05).