Nutrient Digestibility and Retention of Potential Feed Ingredients for Rainbow Trout (Oncorhynchus mykiss W.) Aquaculture in Iran

Table 3

Chemical composition analysis in the test ingredients^† (g·kg⁻¹ dry matter).

Chemical composition	Run 1					Run 2	Run 3
	FeM			PBM	CM	FeM	PBM		PPCon	BM	IRSBM
	RegFeM	GoldFeM	IRFeM	_64		IRFeM^+	LA	_50
Dry matter	960	921	913	938	923	913	927	955	957	928	945
Crude protein	925	947	832	696	379	832	745	544	745	958	491
Crude lipid	69	49	16	118	110	16	120	147	96	19	41
Crude ash	25	19	132	143	74	132	120	334	106	32	92
Organic matter (OM)^⁋	975	981	868	857	926	868	880	666	894	968	908
Calcium^††	6	4	n.a.	54	7	n.a.	33	130	2	1	n.a.
Phosphorous^††	4	2	n.a.	30	13	n.a.	22	69	10	5	n.a.
pH	5.7	6.5	10.1	6.0	6.2	n.a.	n.a.	n.a.	n.a.	n.a.	n.a.
Amino acids^††
Alanine	41.0	39.1	39.6	50.0	18.2	39.6	38.0	29.3	36.2	55.3	n.a.
Arginine	61.6	72.8	42.5	54.3	24.5	42.5	54.3	40.2	43.6	50.0	n.a.
Aspartic acid/asparagine	63.0	68.5	57.9	64.1	27.6	57.9	70.7	46.7	52.1	100.0	n.a.
Cysteine (cystin)	50.1	51.1	19.9	6.5	10.3	19.9	26.1	4.3	6.4	12.8	n.a.
Glutamic acid/glutamine	102.1	110.9	94.3	97.8	73.4	94.3	101.1	71.7	98.9	102.1	n.a.
Glycine	67.7	89.1	70.3	97.8	19.8	70.3	63.0	79.3	94.7	37.2	n.a.
Histidine	9.9	7.6	10.3	10.9	11.4	10.3	19.6	10.9	10.6	57.4	n.a.
Isoleucine	41.5	47.8	39.2	28.3	14.7	39.2	38.0	18.5	19.1	43.6	n.a.
Loucine	75.0	82.6	69.3	50.0	27.7	69.3	75.0	33.7	36.2	119.1	n.a.
Lysine	17.0	18.5	11.9	47.8	23.9	11.9	47.8	33.7	37.2	95.7	n.a.
Methionine (methioninsulfon)	5.3	4.3	4.9	14.1	7.9	4.9	12.0	10.9	10.6	11.7	n.a.
Phenylalanine	45.7	48.9	42.2	30.4	15.8	42.2	40.2	18.5	19.1	57.4	n.a.
Proline	77.3	100.0	89.2	60.9	24.7	89.2	64.1	40.2	54.3	41.5	n.a.
Serine	106.3	126.1	61.2	25.0	17.7	61.2	56.5	17.4	27.7	37.2	n.a.
Threonine	44.4	43.5	22.8	25.0	16.8	22.8	35.9	18.5	22.3	46.8	n.a.
Tryptophan	5.2	9.8	6.2	n.a.	5.7	6.2	n.a.	n.a.	n.a.	n.a.	n.a.
Tyrosine	29.1	13.0	19.2	16.3	10.3	19.2	18.5	9.8	5.3	17.0	n.a.
Valine	59.1	39.1	65.7	35.9	18.8	65.7	58.7	21.7	23.4	70.2	n.a.

^†FeM, feather meal; RegFeM, regular feather meal; GoldFeM, GOLDMEHL® feather meal; IRFeM, Iranian feather meal; PBM_64, poultry by-product meal with minimum 64% crude protein; CM, canola meal; IRFeM⁺, Iranian feather meal diet treated with citric acid (dissolved 0.02 g citric acid, C₆H₁₂O₆, per 1 g Iranian feather meal and sprayed on IRFeM diet or 0.6% diet); PBM_LA, low-ash (<11%) poultry by-product meal; PBM_50, poultry by-product meal with minimum 50% crude protein; PPCon, poultry protein concentrate or AquaTrac® sol SD; BM, ultra-flash dried poultry blood meal; and IRSBM, Iranian soybean meal. ^⁋Calculated by subtracting the crude ash content from 1,000. ^††Adopted from producers’ specifications. n.a., not analyzed.