Extrusion Enhances Metabolizable Energy and Ileal Amino Acids Digestibility of Canola Meal for Broiler Chickens

Figures & data

Table 1. Feed composition of experimental diets.

	Basal diet^°	Assay diets
Ingredients, %		CM	ECM
Corn	54.97	-	-
Soybean meal (44%)	4.10	-	-
Palm oil	5.00	-	-
Corn gluten	1.00	-	-
DCP	2.50	0.60	0.60
Calcium carbonate	0.50	0.60	0.60
Premix	1.00	1.00	1.00
Salt	0.30	0.30	0.30
L-lysine	0.30	-	-
Choline chloride	0.08	-	-
Sodium bicarbonate	0.05	-	-
DL-methionine	0.20	-	-
Canola meal	30.00	97.00	97.00
Titanium dioxide	-	0.50	0.50

°The basal diet was fed to all birds for 4 d before introduction of the assay diet. CM, canola meal; ECM, extruded canola meal. Premix provided the following (per kilogram of diet): vitamin A, 2300 U; vitamin D₃, 400 U; vitamin E, 1.8 mg; vitamin B₁₂, 3.5 mg; riboflavin, 1.4 mg; panthotenic acid, 2 mg; nicotinic acid, 7 mg; pyridoxine, 0.25 mg; folic acid, 0.15 mg; menadione, 0.3 mg; thiamin, 0.15 mg; manganese oxide, 35 mg; ferrous sulfate 35 mg; zinc oxide, 30 mg; copper sulfate, 60 mg; cobalt carbonate, 5 mg; potassium iodine, 0.6 mg; selenium vanadate, 0.09 mg.

Table 2. Analyzed composition (DM basis) of canola meal and extruded canola meal.

	CM	ECM
Analyzed composition
Dry matter, %	93.21	92.13
Gross energy, MJ/kg DM	18.47	18.97
Ash, % DM	6.58	6.24
Crude protein, % DM	39.96	39.36
Crude fibre, % DM	12.42	9.82
Ether extract, % DM	3.03	3.11
Glucosinolate, µmol/g DM	23.28	22.68
Amino acids, % DM
Aspartic acid	2.66	3.00
Serine	1.69	1.84
Glutamic acid	6.36	7.12
Glycine	2.04	2.02
Histidine	1.01	1.22
Arginine	2.18	2.26
Threonine	1.67	1.82
Alanine	1.61	1.78
Proline	2.31	2.55
Cysteine	0.94	0.95
Tyrosine	0.90	0.91
Valine	1.98	2.20
Methionine	0.68	0.70
Lysine	2.04	2.19
Isoleucine	1.48	1.70
Leucine	2.70	3.01
Phenylalanine	1.58	1.73
Tryptophan	0.47	0.47

CM, canola meal; ECM, extruded canola meal.

Table 3. Apparent ileal digestibility of nutrients and amino acids of canola meal and extruded canola meal for broiler chickens.

	CM	ECM	SEM	P
Analyzed composition
AME, MJ/kg DM	9.39	10.87	0.17	<0.001
GE, MJ/kg DM	65.9	73.4	0.4	<0.0001
DM, %	62.2	71.1	0.1	<0.0001
CP, % DM	69.3	75.3	1.7	0.027
Amino acids, % DM
Aspartic acid	69.6	79.1	1.3	0.001
Serine	67.9	78.3	3.1	0.027
Glutamic acid	73.8	84.5	2.6	0.013
Glycine	69.7	73.5	7.5	0.644
Histidine	72.3	81.3	2.4	0.066
Arginine	69.5	75.6	6.1	0.376
Threonine	56.9	70.6	3.1	0.012
Alanine	69.1	75.6	4.2	0.198
Proline	73.0	78.4	7.6	0.516
Cysteine	64.3	73.8	3.7	0.060
Tyrosine	73.0	85.3	5.2	0.136
Valine	63.7	72.4	6.0	0.218
Methionine	86.6	88.1	1.6	0.440
Lysine	71.3	79.4	3.4	0.070
Isoleucine	65.4	71.3	7.3	0.461
Leucine	73.5	78.3	6.0	0.474
Phenylalanine	73.9	80.1	4.6	0.255
Tryptophan	61.0	71.7	2.7	0.015

CM, canola meal; ECM, extruded canola meal; AME, apparent metabolizable energy; GE, gross energy; DM, dry matter; CP, crude protein.