Table 4.

Apparent ileal digestibility (%) of crude protein and amino acids in fish meal, spray-dried porcine plasma, porcine red blood cells, and blood meal fed to growing pigs¹⁾

Item	FM	SDPP	PRBC	BM	SEM	p-value
Crude protein	72.8a	72.8a	76.0a	35.8b	3.43	<0.001
Indispensable amino acid
Arginine	84.1a	80.9a	78.7a	43.5b	3.71	<0.001
Histidine	79.5a	83.2a	88.8a	44.3b	3.38	<0.001
Isoleucine	83.5a	79.9a	39.7b	43.5b	4.43	<0.001
Leucine	83.8a	82.8a	87.0a	43.1b	3.18	<0.001
Lysine	81.5a	81.3a	85.9a	48.0b	3.14	<0.001
Methionine	86.9a	75.1b	80.9ab	55.0c	3.03	<0.001
Phenylalanine	81.2a	82.6a	86.7a	42.2b	3.33	<0.001
Threonine	75.9a	72.4a	69.0a	40.4b	3.76	<0.001
Tryptophan	84.3a	81.8a	85.3a	44.3b	3.74	<0.001
Valine	79.7a	75.3a	84.6a	37.8b	3.37	<0.001
Dispensable amino acid
Alanine	81.1a	78.1a	86.0a	41.6b	3.34	<0.001
Aspartic acid	70.9a	74.3a	83.8a	35.6b	3.45	<0.001
Cysteine	57.2ab	74.4a	51.3b	24.4c	4.91	<0.001
Glutamic acid	81.3a	76.6a	77.1a	42.3b	3.51	<0.001
Glycine	70.0a	57.1a	68.6a	20.5b	5.46	<0.001
Proline	25.9a	42.3a	28.4a	−73.9b	22.56	0.003
Serine	73.5a	71.8a	77.3a	40.7b	3.42	<0.001
Tyrosine	80.4a	81.4a	75.3a	44.5b	3.93	<0.001

FM, fish meal; SDPP, spray-dried porcine plasma; PRBC, porcine red blood cells; BM, blood meal; SEM, standard error of the mean.

¹⁾Each least squares mean represents 8 observations except for pigs fed PRBC (7 observations).

^a–cWithin a row, means with different superscripts differ (p<0.05).