Table 2.

Effect of CP levels in gestation diets on BW, backfat thickness and weaning to estrus interval of gilts in gestation and lactation

Item	Protein level in gestation (%)				SEM1	p-value
	11.44	12.93	15.04	17.13		Linear	Quadratic
No. of sows	5	7	6	6
BW (kg)
At mating	140.5	139.1	139.7	139.8	3.00	0.902	0.813
110 d of gestation	201.9	207.1	204.0	205.3	3.77	0.694	0.610
Gestation gain (d 0 to 110)	61.4	67.9	64.3	65.5	2.08	0.377	0.213
24 h postpartum	179.6	189.3	186.7	189.7	3.40	0.095	0.338
21 d of lactation	174.1	175.2	177.6	177.8	5.67	0.611	0.940
Lactation change (d 0 to 21)	−5.5	−14.1	−9.1	−11.8	4.32	0.492	0.509
Backfat thickness (mm)
At mating	20.8	21.5	19.7	20.5	1.48	0.694	0.965
110 d of gestation	25.2	27.4	24.6	27.7	1.86	0.603	0.821
Gestation gain (d 0 to 110)	4.4	5.9	4.9	7.2	1.31	0.243	0.786
24 h postpartum	22.8	25.4	22.6	24.6	1.97	0.762	0.879
21 d of lactation	19.2	20.9	19.9	22.2	1.72	0.333	0.881
Lactation change (d 0 to 21)	−3.6	−4.4	−2.7	−2.4	0.92	0.224	0.563
Lactation feed intake (kg/d)	3.75	4.11	4.17	4.08	0.457	0.626	0.626
Weaning to estrus interval (d)	5.2	5.1	5.3	5.0	0.42	0.836	0.746

¹Standard error of the mean.