Table 9.

The effect of dietary SID-Lys:ME ratio on sow feed intake in lactation (Exp. 2)

Item	Parity	No.	SID-Lys:ME ratio, g/Mcal							P-value
			2.1	2.4	2.7	3.0	3.3	Mean2	SEM	Treat	Linear	Quadratic
Feed intake, kg/d	1	31	5.40	5.42	5.43	5.36	5.41	5.40x	0.12	1.00	0.89	0.98
	2	32	5.53	5.51	5.50	5.48	5.49	5.50x	0.12	1.00	0.80	0.90
	3+	87	5.75	5.62	5.66	5.74	5.78	5.71y	0.07	0.42	0.38	0.19
	Total1	150	5.67	5.60	5.61	5.64	5.67	5.64	0.06	0.80	0.58	0.33
Lysine intake, g/d	1	31	42.68d	48.20c	54.29b	57.86b	65.41a	53.70x	3.32	< 0.01	< 0.01	0.85
	2	32	43.67e	49.00d	54.96c	59.20b	66.39a	54.64x	3.42	< 0.01	< 0.01	0.89
	3+	87	45.44e	50.03d	56.62c	62.03b	69.91a	56.81y	2.19	< 0.01	< 0.01	0.39
	Total1	150	44.95e	49.88d	56.14c	60.91b	68.54a	56.08	1.64	< 0.01	< 0.01	0.62

¹Parity effect was included in the model

²Parity effect and treatment effect was included in the model

^{a, b, c, d, e}Within a row, values with no common superscript differ significantly (P < 0.05)

^{x, y}Within a column, values with no common superscript differ significantly (P < 0.05)