Table 3.

Lactation performance over a 28-day lactation period of sows fed increasing dietary SID CP levels

	Treatment, % SID CP							Parity			P-value1
	11.8	12.8	13.4	14	14.7	15.6
Item	1	2	3	4	5	6	SEM	First	Multi	SEM	Trt2	Parity
No. sows	11	12	12	11	12	12	-	12	60	-	-	-
Mean parity	3.2	3.2	3.2	3.3	3.2	3.2	-	1	3.6	-	-	-
Total FI day 2–27, kg	169a	160ab	172a	165ab	147b	170a	4.85	139	169	4.64	<0.01	<0.001
Sow BW day 2, kg	266	255	269	269	262	263	8.37	227	272	8.54	0.52	<0.001
Sow BW loss day 2–28, %	6.4	8.6	8.9	8.0	7.0	7.3	1.63	9.1	7.4	1.56	0.89	0.32
Body protein day 4, kg3	42.2	39.7	42.3	42.3	41.3	42.1	1.61	35.8	42.9	1.64	0.27	<0.001
Protein mobilization day 4–18, %	1.6	-0.2	0.7	3.0	0.0	0.6	1.56	0.8	1.0	1.58	0.53	0.92
Body fat day 4, kg3	68.3	67.9	72.4	71.4	66.6	66.7	2.35	60.7	70.5	2.25	0.36	<0.001
Fat mobilization day 4–18, %	16.3	14.0	15.5	14.9	10.6	17.0	3.95	23.4	12.9	3.99	0.82	0.01
Total milk yield day 2–27, kg4	344ab	333ab	357a	337ab	307b	340ab	11.4	319	339	11.3	0.03	0.09
Piglets
Piglets per litter day 2	14	14	14	14	14	14	-	14	14	-	-	-
Mortality day 2–28, %	8.4	7.0	5.1	8.1	13.2	7.9	-	8.3	7.6	-	0.19	0.81
95% CI	[4.7–14.6]	[3.8–12.5]	[2.4–10.3]	[4.5–14.0]	[8.3–20.2]	[4.5–13.7]		[4.5–14.9]	[5.8–10.0]
Litter weight day 2, kg	23.5	23.9	22.7	25.2	23.1	21.9	1.04	20.5	23.9	1.04	0.24	<0.01
Litter weight day 28, kg	105ab	101ab	113a	104ab	89.0b	103ab	5.39	84.1	106	5.42	0.04	<0.001
Litter weight gain day 2–27, kg/d	3.26ab	3.15ab	3.53a	3.32ab	2.84b	3.39ab	0.16	2.63	3.37	0.16	0.04	<0.001

^a,bTreatment means with different superscript letters differ significantly (P < 0.05).

¹No linear, quadratic and cubic effects of dietary treatments were observed P > 0.05.

²Dietary treatment.

³Body fat and protein pool is calculated from Rozeboom et al. (1994).

⁴Milk yield estimated by equations from Hansen et al. (2012).