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

Table 3 Protein and amino acids flow at the ileum level, in terms of dry matter intake (g/kg)

g CP/kg feed	80	160	240	SEM¹	P value²
Protein^C	17.67^a	22.10^b	22.72^b	0.77	0.05
Essential amino acids
Arginine	1.25	1.56	1.47	0.06	NS
Histidine^B	0.36°	0.52^b	0.74^b	0.04	0.001
Lysine	0.61	0.74	0.71	0.04	NS
Isoleucine^B	0.65°	0.88^b	0.93^b	0.03	0.01
Leucine^E	0.91	1.17	1.11	0.04	NS
Valine^B	0.81°	1.08^b	1.11^b	0.04	0.05
Methionine	0.30	0.31	0.25	0.02	NS
Phenylalanine^E	0.55	0.67	0.60	0.03	NS
Threonine^B	1.01°	1.34^b	1.43^b	0.05	0.05
Non essential amino acids
Alanine^D	0.97	1.24	1.22	0.05	NS
Aspartic acid^C	1.26°	1.77^b	1.73^b	0.08	0.05
Cystine	0.32	0.37	0.39	0.05	NS
Glutamic acid^C	2.33°	3.65^b	3.76^b	0.21	0.05
Glycine	0.94	0.97	1.02	0.04	NS
Proline^D	1.03	1.37	1.40	0.08	NS
Serine^A	1.04°	1.49^b	1.69^b	0.06	0.01
Tyrosine^E	0.49	0.61	0.55	0.03	NS

¹ Standard error of the mean.
^2ab Means with different superscript differ at probability level show in the fifth column.
NS non significant.
^A Linear effect (P < 0.001), ^B Linear effect (P < 0.01), ^C Linear effect (P < 0.05), ^D Linear effect (P < 0.10), ^E Quadratic effect (P < 0.10).

ISSN: 2049-1891