Table 3.

Effect of dietary Met:Lys ratio in the lactation diet on growth performance of piglets

Items	Met:Lys				SEM	P-value
	0.27	0.37	0.47	0.57		Linear	Quadratic	Feed
No. of sows	27	30	28	31
Litter size, number/litter
After cross-fostering	11.26	11.5	11.18	11.42	0.09	0.85	0.98	0.58
At day 7	10.63	10.87	10.14	10.45	0.12	0.24	0.49	0.15
At day 14	10.22	10.47	9.68	10.13	0.12	0.34	0.56	0.11
Pigs weaned	9.89	10.13	9.36	9.97	0.13	0.68	0.68	0.15
Survival rate of piglets, %	87.91	88.20	84.29	87.45	1.02	0.62	0.65	0.53
Piglet mean BW, kge
After cross-fostering	1.78	1.78	1.74	1.76	0.01	0.24	0.41	0.60
At day 7c	2.78B	3.13A	3.01AB	3.04A	0.02	0.15	0.33	< 0.0001
At day 14	4.78	5.11	5.07	5.07	0.03	0.26	0.49	0.12
At day 21d	6.85b	7.07ab	7.55a	7.25ab	0.04	0.06	0.08	0.02
Piglet ADG, g/de
Week 1c	143B	191A	174AB	179A	2	< 0.01	< 0.001	< 0.001
Week 2	280	288	289	285	2	0.83	0.98	0.94
Week 3	289	300	294	307	2	< 0.001	< 0.001	0.60
Days 1–21	243	261	256	260	1	0.01	< 0.01	0.25
Litter weight, kge
After cross-fostering	20.48	20.34	19.46	20.04	0.33	0.47	0.66	0.71
At day 7	31.54	32.13	31.25	31.54	0.52	0.47	0.75	0.88
At day 14	51.6	51.63	50.11	50.86	0.76	0.38	0.60	0.84
At day 21	70.53	71.24	69.10	71.23	1.02	0.80	0.84	0.85

SEM standard error of the mean, BW body weight, ADG average daily gain

^{c, d}Means in the same row with different letters differ significantly; the different lowercase letters represent P < 0.05, and the different capital letters represent P < 0.01

^eThe results of piglet mean BW, ADG and litter weight are expressed as Lsmeans