Table 5.

The effect of increasing SID CP on sow body composition and body mobilization (n = 72)¹

	Dietary treatment, SID CP g/kg2							P-value3,4
	92	107	116	125	135	149
Item	1	2	3	4	5	6	SEM	Trt	Lin	Quad
Body fat day 3, kg	60.8	59.3	62.8	57.4	59.5	59.8	1.77	0.20	NS	NS
Body protein day 3, kg	44.0	44.3	43.7	44.6	44.2	44.2	0.30	0.23	NS	NS
Body fat change (days 3–26), kg	−14.0	−12.3	−14.2	−14.1	−13.3	−15.8	2.10	0.77	NS	NS
Body protein change (days 3–26), kg	−0.40b	1.11ab	1.12ab	0.89ab	1.71a	1.02ab	0.52	<0.05	*	*
Response	Model5	BP6		Equation					P-value7
Body protein change (days 3–26), kg	LB	106 ± 7.3		Yi = 1.15 − 0.1 × (106 − Xi) for Xi < 106					0.14

^abWithin a row, values without common superscript letters, differ (P < 0.05).

¹For changes in pools of body fat and protein, sow BW and back fat thickness was used as a covariate in the model, respectively.

²Treatment 1 through 6: The calculated mean SID CP content for the dietary treatment fed to sows in the given treatment group.

³ P-values for the dietary treatment (Trt) are from the ANOVA test using the MIXED procedure of SAS.

⁴Orthogonal polynomial contrasts were used to evaluate linear (lin) and quadratic (quad) effects of SID CP: NS = not significant, *<0.05.

⁵Best fitting model, L = linear line, LB = linear broken-line.

⁶BP = breakpoint for the linear broken-line.

⁷The P-value for the slope where P-values below 0.15 were accepted.