Different dietary methionine to lysine ratios in the lactation diet: effects on the performance of sows and their offspring and methionine metabolism in lactating sows

Table 4 Influence of dietary Met:Lys ratio in lactation diet on composition of colostrum and milk

Items		Met:Lys				SEM	P-value
Items		0.27	0.37	0.47	0.57	SEM	Linear	Quadratic	Feed
No. of sows^a
Fat, %	Colostrum	5.57	6.05	5.49	5.22	0.28	0.47	0.74	0.82
	Milk of day 7	7.02	7.86	7.48	7.98	0.23	0.20	0.41	0.45
	Milk of day 20	6.94	6.93	7.45	7.27	0.14	0.23	0.47	0.46
Protein, %	Colostrum	12.07	13.10	11.23	13.70	0.52	0.46	0.63	0.33
	Milk of day 7	6.31	7.09	6.49	6.96	0.14	0.27	0.51	0.2
	Milk of day 20	6.31	6.25	6.29	6.20	0.05	0.58	0.86	0.9
Lactose, %	Colostrum	4.90	4.59	5.17	4.65	0.09	0.82	0.74	0.1
	Milk of day 7	6.61	6.46	6.60	6.17	0.09	0.088	0.16	0.20
	Milk of day 20	6.73	6.68	6.54	6.85	0.07	0.71	0.40	0.45
Total solids content, %	Colostrum	30.01	31.19	29.30	30.91	0.47	0.83	0.92	0.49
	Milk of day 7	27.53	29.01	28.19	28.78	0.29	0.24	0.40	0.32
	Milk of day 20	27.48	27.38	27.87	27.85	0.15	0.27	0.54	0.6
Moisture, %	Colostrum	69.99	68.81	70.70	69.09	0.47	0.83	0.92	0.49
	Milk of day 7	72.47	70.99	71.81	71.22	0.29	0.24	0.40	0.32
	Milk of day 20	72.52	72.62	72.13	72.15	0.15	0.27	0.54	0.6
Solid not fat, %	Colostrum	20.75	21.41	20.09	22.11	0.44	0.42	0.59	0.38
	Milk of day 7	16.46	17.08	16.59	16.67	0.09	0.87	0.50	0.16
	Milk of day 20	16.50	16.37	16.31	16.48	0.06	0.84	0.32	0.61

^aThe number of samples of sows in each group was more than 9 but not equal; SEM, standard error of the mean