Table 8.

Effect of CP levels in gestation diets on amino acid composition (g/100 g milk protein) in milk of primiparous sows at 21 d of lactation¹

Item	Protein level in gestation (%)				SEM2	p-value
	11.44	12.93	15.04	17.13		Linear	Quadratic
Essential amino acids
Arg	4.59	4.64	4.52	4.43	0.040	0.009	0.145
His	2.67	2.72	2.69	2.67	0.038	0.944	0.379
Ile	3.93	3.93	3.94	3.84	0.051	0.307	0.377
Leu	8.56	8.36	8.51	8.61	0.097	0.492	0.153
Lys	7.58	7.55	7.59	7.50	0.059	0.490	0.642
Met	2.54	2.02	2.22	1.84	0.101	0.002	0.505
Phe	3.84	3.78	3.80	3.84	0.038	0.847	0.188
Thr	4.26	4.13	4.23	4.23	0.040	0.751	0.119
Val	5.89	5.99	5.96	5.94	0.048	0.538	0.229
Non-essential amino acids
Ala	3.51	3.53	3.56	3.52	0.055	0.811	0.697
Asp	8.11	8.06	8.03	7.96	0.067	0.151	0.836
Cys	1.56	1.46	1.50	1.24	0.071	0.019	0.297
Glu	20.42	20.91	20.72	21.13	0.139	0.012	0.751
Gly	2.96	3.08	2.98	3.07	0.067	0.491	0.837
Pro	10.47	10.84	10.58	11.09	0.174	0.071	0.690
Ser	5.15	5.04	5.19	5.15	0.041	0.419	0.393
Tyr	3.98	3.98	3.99	3.90	0.081	0.575	0.637

¹Least squares means of 5 observations per treatment.

²Standard error of mean.