Amino acid digestibility of heat damaged distillers dried grains with solubles fed to pigs

Table 1 Chemical composition of distillers dried grains with solubles

	Distillers dried grains with solubles
		Autoclaved at 130°C
Item	Non-autoclaved	10 min	20 min	30 min
Dry matter, %	93.21	92.43	90.91	94.47
Ash, %	5.25	5.08	5.17	5.06
Crude protein (CP), %	27.91	27.44	26.51	27.05
AEE,¹ %	10.20	12.73	12.83	9.25
Lysine: CP ratio²	2.94	2.37	2.75	2.51
Furosine, %	0.015	0.009	0.006	0.008
Reactive Lysine³	0.80	0.64	0.72	0.67
Acid detergent fibre, %	7.96	11.05	9.85	10.89
Neutral detergent fibre, %	31.29	33.23	33.32	32.40
Acid detergent lignin, %	0.88	2.06	1.73	2.57
Acid detergent insoluble N,⁴ %	0.12	0.53	0.42	0.55
Reducing sugars, %	0.78	0.60	0.88	0.65
Indispensable AA, %
Arginine	1.24	1.10	1.19	1.10
Histidine	0.71	0.67	0.70	0.67
Isoleucine	0.97	0.91	0.96	0.93
Leucine	2.92	2.82	2.89	2.78
Lysine	0.82	0.65	0.73	0.68
Methionine	0.53	0.49	0.52	0.50
Phenylalanine	1.24	1.17	1.21	1.17
Threonine	1.02	0.98	1.01	0.98
Tryptophan	0.22	0.20	0.20	0.20
Valine	1.26	1.19	1.26	1.23
Dispensable AA, %
Alanine	1.90	1.83	1.87	1.82
Aspartic acid	1.75	1.66	1.73	1.66
Cysteine	0.55	0.50	0.52	0.50
Glutamine	4.43	4.31	4.41	4.26
Glycine	1.08	1.04	1.09	1.04
Proline	2.21	2.06	2.13	2.04
Serine	1.31	1.26	1.29	1.23

¹AEE = acid hydrolyzed ether extract.
²Calculated by expressing the concentration of Lysine in each ingredient as a percentage of the concentration of CP[23].
³Reactive Lysine (%) = [Lysine (%) – (Furosine (%) ÷ 0.32 × 0.40)];[2].
⁴ADIN, acid detergent insoluble nitrogen.

ISSN: 2049-1891