Short communication: Estimation of the dietary standardized ileal digestible valine to lysine ratio required for 40 to 130 kg pigs during the finisher periods

Table 1 Ingredient, calculated and analyzed nutrient composition of the diets (g kg^− 1 as-fed)

Item	Exp.1(40–75 kg)		Exp.2(75–100 kg)	Exp.3(100–130 kg)
Ingredients
Corn	797		823	786
Soybean meal (43.9% CP)	111		48.1	21.2
Wheat bran	56.1		95.9	61.2
Corn Starch	0		0	100
Limestone	7.66		7.74	6.84
Dicalcium phosphate	11.3		8.37	8.22
Salt	4.00		4.00	4.00
Choline chloride	0.70		0.70	0.70
Vitamin-mineral premix^†	5.00		5.00	5.00
L-Lys sulfate 70.0%	5.63		5.87	5.24
L-Thr 98.5%	1.11		1.14	1.14
DL-Met 99.0%	0.24		0	0
L-Trp 98.0%	0.29	0.34		0.34
L-Val 99.0%^‡	Variable		Variable	Variable
L-Ile 99.0%	0.03		0.29	0.37
Calculated composition
CP	128		109	88.7
NE, MJ	10.4		10.4	10.4
SID-Lys	7.50		6.30	5.10
SID-(Met + Cys): Lys	0.57		0.59	0.60
SID-Thr: Lys	0.62		0.63	0.66
SID-Trp: Lys	0.18		0.18	0.18
SID-Val: Lys	0.61		0.61	0.61
SID-Ile: Lys	0.53		0.53	0.54
SID-Leu: Lys	1.37		1.40	1.48
SID-His: Lys	0.39		0.39	0.39
Analyzed composition^§
Dry matter	881		872	871
CP	132		114	92.8
Total Lys	8.25		6.93	5.61
Total Met + Cys	4.95		4.42	4.24
Total Thr	5.49		4.68	3.92
Total Trp	1.71		1.51	1.35
Total Val	5.32		4.46	3.64
Total Ile	5.33		5.07	3.78
Total Leu	11.55		8.85	8.53

Abbreviations: SID = standardized ileal digestible; CP = crude protein; NE = net energy
^†Premix provided the following per kilogram of complete diet in Exp.1: vitamin A, 9,000 IU; vitamin D₃, 2,400 IU; vitamin E, 20 IU; vitamin K₃, 3 mg; thiamine, 1.4 mg; riboflavin, 4 mg; pyridoxine, 3 mg; vitamin B12, 12 µg; nicotinic acid, 30 mg; pantothenic acid, 14 mg; folic acid, 0.8 mg; biotin, 44 µg; Fe, 76 mg; Cu, 240 mg; Zn, 76 mg; Mn, 20 mg; I, 0.48 mg; Se, 0.4 mg; Premix provided the following per kilogram of complete diet in Exp.2 and Exp.3: vitamin A, 6,000 IU; vitamin D₃, 2,400 IU; vitamin E, 20 IU; vitamin K₃, 2 mg; thiamine, 0.96 mg; riboflavin, 5.3 mg; pyridoxine, 2 mg; vitamin B12, 12 µg; nicotinic acid, 22 mg; pantothenic acid, 11.2 mg; folic acid, 0.4 mg; biotin, 40 µg; Fe, 76 mg; Cu, 120 mg; Zn, 76 mg; Mn, 12 mg; I, 0.24 mg; Se, 0.4 mg
^‡L-valine added at 0, 0.30, 0.61, 0.91, and 1.21 g kg^− 1 to the basal diet in Exp.1; L-valine added at 0, 0.25, 0.51, 0.76, and 1.02 g kg^− 1 to the basal diet in Exp.2; L-valine added at 0, 0.21, 0.41, 0.62, and 0.82 g kg^− 1 to the basal diet in Exp.3
^§Three samples of each diet were analyzed (n = 3)

ISSN: 2055-5660