Table 3.

Main effects of dietary factors on the performance of unchallenged chickens by phytohemagglutinin (PHA) calculated between d 9 and d 42.

Main	Final body	Feed intake,	FCR, kg feed ·
effect	weight, g	g	kg−1 BWG
Dietary PUFA n-6:n-3 ratio (D)1
High	2,855	3,918	1.48
Low	2,884	4,038	1.51
Vitamin E level (E)2
Basal	2,866	3,962	1.49
Increased	2,873	3,994	1.50
Pooled SEM	22.5	36.2	0.007
Probability (P-value)
D	0.54	0.11	0.13
E	0.89	0.66	0.58
D × E	0.66	0.88	0.23

¹High, diets with corn oil; Low, diets with a mixture of linseed and fish oils.

² Basal, 50 mg l-α-tocopheryl acetate kg⁻¹ of diet; Increased, 300 mg l-α-tocopheryl acetate kg⁻¹ of diet.