Table 5 Effects of dietary Fe on hematological indices of broilers on d 21

Control¹

0

78.1

30.7

1.05*

3.62

30.1*

FeSO₄∙7H₂O ¹

20

76.8

29.8

1.10

3.19

34.2

40

78.1

30.6

1.23

3.58

36.0

60

79.9

31.1

1.30

3.23

41.8

Fe-Prot ES¹

20

81.5

31.9

1.03

3.57

28.5

40

80.7

31.2

1.15

3.22

38.3

60

79.4

31.0

1.34

3.42

40.5

Feed grade NaFeEDTA¹

20

78.5

31.2

1.09

3.40

32.9

40

80.5

31.3

1.20

3.18

37.6

60

78.2

30.3

1.44

3.49

42.9

Food grade

NaFeEDTA¹

20

77.0

30.0

1.14

3.68

31.3

40

78.6

30.9

1.27

3.37

38.2

60

80.7

31.6

1.49

3.40

45.3

Pooled SE

0.94

0.37

0.06

0.29

2.50

Fe source²

FeSO₄∙7H₂O

78.3

30.6

1.21

3.33

37.3

Fe-Prot ES

80.5

31.4

1.18

3.40

35.8

Feed grade NaFeEDTA

79.1

30.9

1.24

3.36

37.8

Food grade NaFeEDTA

78.8

30.8

1.30

3.48

38.3

Pooled SE

0.82

0.32

0.04

0.18

1.57

Added Fe level³, mg/kg

20

78.5

30.7

1.09^c

3.46

31.7^c

40

79.4

31.0

1.21^b

3.34

37.5^b

60

79.6

31.1

1.39^a

3.39

42.6^a

Pooled SE

1.63

0.64

0.03

0.16

1.33

P-value

Fe source

0.3894

0.4786

0.0935

0.9434

0.7114

Added Fe level

0.5756

0.7336

< 0.0001

0.8595

< 0.0001

Fe Source × added Fe level

0.5201

0.2347

0.8045

0.8857

0.7945

Linear effect⁴

–

–

< 0.0001

–

< 0.0001