Estimation of endogenous protein and amino acid ileal losses in weaned piglets by regression analysis using diets with graded levels of casein

Table 5 Apparent ileal digestibility

g CP/kg feed	80	160	240	SEM¹	P value²
Protein^A	82.8°	86.5^b	90.4^c	0.06	0.001
Essential amino acids
Arginine^A	62.3°	73.5^b	84.1^c	1.17	0.001
Histidine^A	85.5°	89.0^b	89.8^b	0.71	0.05
Lysine^A	93.4°	94.5^ab	96.1^b	0.35	0.05
Isoleucine^A	85.6°	89.3^b	92.6^c	0.39	0.001
Leucine^A	88.7°	92.0^b	95.1^c	0.35	0.001
Valine^A	85.7°	90.7^b	93.1^c	0.39	0.001
Methionine^A	89.7^a	93.3^b	96.9^c	0.42	0.001
Phenylalanine^A	88.0°	92.0^b	95.6^c	0.38	0.001
Threonine^A	76.7°	80.2^b	86.9^b	0.78	0.001
Non essential amino acids
Alanine^A	65.5°	74.9^b	84.0^c	1.09	0.001
Aspartic acid^A	79.5°	83.9^b	90.0^c	0.72	0.001
Cystine^A	51.4^a	72.3^b	79.5^b	4.26	0.01
Glutamic acid^A	88.1°	89.8^a	93.4^b	0.55	0.01
Glycine^A	47.7^a	69.7^b	79.3^c	1.23	0.001
Proline^A	87.1^a	91.7^b	93.6^b	0.49	0.001
Serine^A	78.1°	82.5^b	87.5^c	0.73	0.001
Tyrosine^A	88.8^a	92.1^b	95.7^c	0.37	0.001

¹ Standard Error of the Mean.
^2abc Means with different superscript differ at probability level show in the fifth column.
^A Linear effect (P < 0.001).

ISSN: 2049-1891