Table 8.

Effects of increasing lysine in lactation on litter performance of high-performing gilts and sows under commercial conditions, Exp. 2¹

	Standardized ileal digestible Lys, %					Probability, P <
Item	0.75	0.90	1.05	1.20	SEM	Linear	Quadratic
Total born	15.9	15.4	15.4	16.4	0.38	0.497	0.255
Litter size2, n
d 2	13.6	13.7	13.7	13.7	0.07	0.950	0.965
d 17	12.6	12.7	12.7	12.7	0.11	0.896	0.945
Litter weight, kg
d 2	21.5	21.8	22.2	21.2	0.34	0.835	0.016
d 17	61.3	61.5	64.1	60.2	0.64	0.807	0.001
Litter gain d 2 to 17, kg	39.7	39.8	42.5	38.6	0.64	0.807	0.001
Litter ADG d 2 to 17, g	2,695	2,704	2,887	2,619	43.4	0.807	0.001
Subsequent performance3
Total born per sow farrowed, n	15.9	16.0	16.3	15.1	0.41	0.482	0.310
Born alive, %	92.0	93.0	92.0	92.4	0.78	0.863	0.666
Stillborns, %	4.3	3.3	4.2	5.1	0.63	0.150	0.065
Mummies, %	3.5	3.6	3.7	2.4	0.51	0.158	0.110

¹A total of 710 sows (DNA 241, DNA Genetics, Columbus, NE) and litters were used in a lactation study from d 112 of gestation until weaning.

²Litters were cross-fostered to equalize litter size up to 48-h post-farrowing.

³Number of sows included in subsequent performance are 161, 149, 140, 108 for dietary treatments of 0.75, 0.90, 1.05 and 1.20% SID Lys, respectively.