Effects of the standardized ileal digestible lysine to metabolizable energy ratio on performance and carcass characteristics of growing-finishing pigs

Table 6 Effect of dietary increasing SID-Lys:ME ratio on performance of growing-finishing pigs (Experiments 4, 5 and 6)¹

Item	SID-Lys:ME ratio, g/Mcal					SEM	P value
							ANOVA	Linear	Quadratic
Experiment 4 (29 to 47 kg)	2.4	2.6	2.8	3.0	3.2
Weight gain, kg/d	0.62^a	0.64^ab	0.64^ab	0.68^b	0.66^b	0.01	0.04	0.09	0.22
Feed intake, kg/d	1.85	1.80	1.76	1.74	1.73	0.06	0.66	0.34	0.61
Feed efficiency	0.34	0.36	0.37	0.39	0.38	0.02	0.24	0.04	0.09
Experiment 5 (54 to 76 kg)	2.1	2.3	2.5	2.7	2.9
Weight gain, kg/d	0.73^a	0.77^b	0.80^b	0.80^b	0.79^b	0.01	< 0.01	0.01	0.01
Feed intake, g/d	2.44	2.44	2.38	2.35	2.34	0.08	0.86	0.49	0.79
Feed efficiency	0.30	0.32	0.34	0.34	0.34	0.01	0.16	0.05	0.10
Experiment 6 (84 to 109 kg)	1.8	2.0	2.2	2.4	2.6
Weight gain, kg/d	0.79^ab	0.76^a	0.88^c	0.86^c	0.84^bc	0.03	< 0.01	0.03	0.06
Feed intake, kg/d	3.26	3.20	3.34	3.35	3.15	0.10	0.24	0.86	0.57
Feed efficiency	0.24	0.24	0.26	0.26	0.27	0.01	0.07	0.02	0.08

^a-cMeans in the same row with different superscripts are significantly different (P < 0.05).
¹Value represent means of six pens with 11 to 15 pigs per pen during a 28-d period.

ISSN: 2049-1891