Table 5.

Effects of DDGS withdrawal periods on overall growth performance and carcass characteristics, Exp. 1^1,2,3

	DDGS withdrawal period, day before marketing				Probability, P
Item4	28	21	14	0	Linear	Quadratic
Growth performance
ADG, kg	1.07	1.04	1.02	1.02	0.022	0.202
	0.014	0.014	0.014	0.014
ADFI, kg	2.96	2.92	2.90	2.87	0.112	0.729
	0.041	0.041	0.043	0.041
G:F	0.361	0.357	0.354	0.357	0.479	0.248
	0.0037	0.0037	0.0039	0.0037
Final BW, kg	127.1	126.5	125.6	125.8	0.328	0.476
	0.941	0.941	0.982	0.941
Carcass characteristics
HCW, kg	95.3	94.6	94.1	93.7	0.166	0.702
	0.81	080	0.83	0.81
Carcass yield, %	75.8	75.5	75.6	74.7	0.001	0.377
	0.18	0.18	0.19	0.18
Backfat, mm5	14.8	15.2	15.6	15.1	0.430	0.019
	0.19	0.19	0.20	0.20
Loin depth, mm5	63.3	62.4	62.9	62.5	0.106	0.388
	0.27	0.27	0.28	0.27
Lean, %5	54.9	54.6	54.5	54.7	0.214	0.033
	0.11	0.11	0.11	0.11

¹A total of 985 finishing pigs (initially 99 ± 2.5 kg BW) were used in a 28-d experiment to evaluate the effects of DDGS withdrawal periods.

²Pigs were fed diets containing 30% DDGS until the start of the trial. Diets with DDGS during the trial also contained 30%.

³Pens of pigs were topped according to a typical summer marketing strategy with one top prior to final barn marketing. All pens were topped by removing the 17% heaviest pigs 21 days before final marketing, resulting in a final barn marketing of approximately 83% of starting barn inventor.

⁴Standard error of the means are reported below the treatment means.

⁵ HCW was used as a covariate.