Table 1 Effects of Nc dry powder and water extract on growth performance of yellow-feathered broilers (n = 6)

BW

1 d

41.22 ± 0.18

41.75 ± 0.86

41.53 ± 0.62

41.90 ± 0.53

41.27 ± 0.26

41.68 ± 0.18

21 d

337.36 ± 2.87^ab

351.57 ± 2.78^a

335.56 ± 4.47^ab

329.86 ± 4.86^b

342.92 ± 6.86^ab

334.44 ± 7.85^b

35 d

731.00 ± 7.24^ab

758.96 ± 3.45^a

733.35 ± 5.96^ab

716.30 ± 6.88^b

724.17 ± 8.44^ab

723.17 ± 15.3^ab

63 d

1689.67 ± 14.50^bc

1753.67 ± 14.67^a

1726.13 ± 15.35^ab

1670.73 ± 29.72^bc

1695.59 ± 12.29^bc

1657.17 ± 18.73^c

ADG

1–21 d

14.10 ± 0.14^ab

14.76 ± 0.13^a

14.00 ± 0.21^ab

13.71 ± 0.23^b

14.36 ± 0.33^ab

13.94 ± 0.37^b

22–35 d

28.12 ± 0.62

29.10 ± 0.29

28.41 ± 0.34

27.61 ± 0.78

27.23 ± 0.57

27.77 ± 1.42

36–63 d

34.24 ± 0.57^ab

35.52 ± 0.47^a

35.46 ± 0.38^a

34.09 ± 1.09^ab

34.70 ± 0.21^ab

33.36 ± 0.33^b

1–63 d

26.17 ± 0.23^bc

27.17 ± 0.23^a

26.74 ± 0.24^ab

25.86 ± 0.47^bc

26.26 ± 0.20^bc

25.64 ± 0.30^c

ADFI

1–21 d

23.11 ± 0.37

24.12 ± 0.17

23.69 ± 0.21

23.38 ± 0.23

23.46 ± 0.24

23.46 ± 0.35

22–35 d

55.43 ± 0.25^ab

57.22 ± 0.68^a

56.00 ± 0.84^ab

55.15 ± 0.55^ab

54.74 ± 0.64^b

54.42 ± 0.92^b

36–63 d

88.26 ± 0.63^ab

88.57 ± 0.66^ab

89.58 ± 0.80^a

89.32 ± 1.09^a

89.90 ± 0.29^a

86.91 ± 0.81^b

1–63 d

59.54 ± 0.38^ab

60.00 ± 0.33^a

60.15 ± 0.55^a

59.75 ± 0.56^ab

59.76 ± 0.20^ab

58.54 ± 0.37^b

FCR

1–21 d

1.64 ± 0.01^ab

1.63 ± 0.01^b

1.69 ± 0.02^ab

1.71 ± 0.03^a

1.64 ± 0.03^b

1.68 ± 0.02^ab

22–35 d

1.98 ± 0.04

1.97 ± 0.02

1.97 ± 0.03

2.01 ± 0.06

2.01 ± 0.03

1.99 ± 0.13

36–63 d

2.58 ± 0.04

2.53 ± 0.02

2.53 ± 0.01

2.63 ± 0.08

2.55 ± 0.01

2.61 ± 0.02

1–63 d

2.27 ± 0.01

2.23 ± 0.01

2.25 ± 0.01

2.32 ± 0.04

2.27 ± 0.02

2.29 ± 0.02