Comparative Characterization of Trends and Patterns of Physical and Chemical Attributes of Optimal and Traditional Processed Cowpea Leaves
Table 7
AIC model selection criterion for independent factors affecting nutrient and antinutrient composition of cowpea leaves harvested at different maturity stages.
Response variables
Delta values for models prediction (AIC weight %)
Model_1
Model_2
Model_3
Model_4
Model_5
Moisture content
5.9 (5)
0.0 (92)
8 (2)
7.9 (2)
15.8 (0)
Crude protein
2.4 (17)
0.0 (55)
4.9 (5)
1.69 (23)
17.3 (0)
Crude fat
0 (65)
7.5 (2)
12.0 (0)
1.4 (33)
17.5 (0)
Crude ash
5.78 (0)
0.1 (47)
0.8 (3)
0.0 (47)
0.9 (3)
Crude fibre
6.9 (2)
6.0 (4)
7.5 (2)
2.6 (20)
0.0 (73)
Beta-carotene
3.1 (18)
0.0 (82)
21.9 (0)
20.8 (0)
20.6 (0)
Vitamin C
5.7 (0.0)
0.0 (43)
1.1 (25)
0.7 (30)
21.6 (0)
Zinc
11.6 (0)
11.2 (0)
13.05 (0)
7.52 (2)
0.0 (97)
Iron
5.7 (0.02)
0.7 (35)
5.8 (0)
0.0 (65)
3.0 (0)
Sodium
0.0 (87)
9.4 (1)
66.7 (0)
64.6 (0)
4.0 (12)
Calcium
0 (92)
13.1 (0)
19.6 (0)
6.6 (3)
6.2 (5)
Total phenolics
0 (1)
58.1 (0)
61.6 (0)
22.1 (0)
9.0 (1)
Flavonoids
0.0 (56)
31.4 (0)
32.9 (0)
0.47 (44)
16.4 (0)
Nitrates
2.9 (11)
8.6 (1)
10.6 (0)
0.0 (89)
12.1 (0)
Oxalates
6.0 (1)
0 (65)
2.9 (15)
2.8 (16)
23.4 (0)
Antioxidant activity
5.4 (3)
0.0 (44)
1.08 (24)
0.42 (33)
16.4 (0)
Independent variable for Model_1 is the main effect of type of variety, season and period of harvesting in weeks after emergence; Model_2 is main effect of type of variety; Model_3 is main effect of season; Model_4 is main effect of period of harvesting in weeks after emergence; and Model_5 is interaction factors of type of variety, season and period of harvesting in weeks after emergence.
