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Table 2 Effects of in ovo feeding of L-arginine on growth performance of layer chicks

From: Dynamic alterations in early intestinal development, microbiota and metabolome induced by in ovo feeding of L-arginine in a layer chick model

Item3

  

Arg dosage (mg/egg)

Pooled SEM

P-value

NC1

SC2

2

6

10

ANOVA

Linear

Quadratic

d 0 to 14

 ADG, g

6.14

6.40

6.35

6.29

6.56

0.07

0.451

0.757

0.568

 ADFI, g

11.45

12.11

11.55

11.60

11.85

0.12

0.410

0.109

0.279

 F/G

1.87

1.90

1.82

1.82

1.87

0.02

0.500

0.442

0.714

d 15 to 21

 ADG, g

7.86b

7.62b

7.62b

7.70b

8.56a

0.10

0.011

0.021

0.032

 ADFI, g

19.42b

19.62b

19.19b

19.72b

20.82a

0.16

0.019

0.037

0.044

 F/G

2.53

2.58

2.49

2.50

2.41

0.02

0.213

0.622

0.535

d 0 to 21

 ADG, g

6.45b

6.71ab

6.69ab

6.72ab

7.00a

0.06

0.030

0.073

0.143

 ADFI, g

13.80b

14.61a

14.25ab

14.02ab

14.66a

0.11

0.021

0.847

0.075

 F/G

2.14a

2.14a

2.13a

2.08b

2.07b

0.01

0.016

0.047

0.032

d 22 to 42

 ADG, g

12.23

12.65

12.55

12.86

12.52

0.09

0.228

0.869

0.647

 ADFI, g

32.30

32.37

32.80

33.49

33.00

0.22

0.075

0.545

0.284

 F/G

2.62

2.61

2.62

2.61

2.64

0.01

0.957

0.581

0.833

d 0 to 42

 ADG, g

9.28

9.55

9.51

9.55

9.58

0.05

0.400

0.509

0.826

 ADFI, g

22.49

22.67

22.25

23.16

23.05

0.15

0.291

0.395

0.427

 F/G

2.45

2.42

2.40

2.41

2.41

0.01

0.564

0.717

0.935

  1. a–bMeans within a row with no common superscripts differ significantly (P < 0.05). Data are the mean of 8 replicates. 1NC, non-injected control group; 2SC, saline-injected control group. 3ADG, average daily gain; ADFI, average daily feed intake; F/G, feed conversion ratio (feed: gain, g: g). Orthogonal polynomial contrasts were used to determine the linear and quadratic effects of increasing concentrations of L-arginine solution