Table 1 Eggshell quality test results

Eggshell color

blunt pole

L-value

58.72 ± 0.64^a

51.04 ± 0.52^b

58.19 ± 0.73^a

a-value

18.59 ± 0.17^b

20.14 ± 0.26^a

17.95 ± 0.16^c

b-value

28.57 ± 0.22^a

27.25 ± 0.33^b

28.67 ± 0.33^a

equator

L-value

59.95 ± 0.89^a

52.35 ± 0.67^c

58.77 ± 0.76^b

a-value

18.44 ± 0.17^b

20.02 ± 0.21^a

18.50 ± 0.13^b

b-value

28.48 ± 0.20^a

26.94 ± 0.28^b

28.78 ± 0.21^a

sharp pole

L-value

60.13 ± 0.84^a

52.11 ± 0.52^b

58.67 ± 0.76^a

a-value

18.58 ± 0.16^b

19.68 ± 0.20^a

18.53 ± 0.15^b

b-value

28.61 ± 0.22^a

26.90 ± 0.31^b

28.9 ± 0.21^a

Eggshell thickness

blunt pole

0.41 ± 0.00^b

0.44 ± 0.01^a

0.42 ± 0.01^b

equator

0.43 ± 0.00

0.44 ± 0.01

0.43 ± 0.01

sharp pole

0.44 ± 0.00

0.45 ± 0.00

0.43 ± 0.01

Transverse diameter of an egg

44.59 ± 0.23

44.58 ± 0.33

Longitudinal diameter of an egg

58.16 ± 0.51

57.78 ± 0.94