Table 7 Effects of Qiamagu polysaccharides on the immune organ index of yellow feathered broilers

21 days old

Thymus index(%)

2.46 ± 1.66

3.68 ± 1.24

2.27 ± 1.06

3.46 ± 0.57

0.412

Spleen index(%)

0.96 ± 0.24^b

2.07 ± 0.46^a

1.26 ± 0.46^a

1.48 ± 0.49^ab

0.031

Bursa index(%)

2.68 ± 0.94

3.46 ± 0.95

3.50 ± 0.75

2.78 ± 0.33

0.292

42 days old

Thymus index(%)

4.21 ± 1.87

5.03 ± 1.48

5.59 ± 1.87

5.18 ± 2.00

0.703

Spleen index(%)

1.47 ± 0.31

1.72 ± 0.67

1.67 ± 1.08

1.49 ± 0.37

0.525

Bursa index(%)

1.52 ± 0.58^b

2.98 ± 1.58^a

1.92 ± 0.79^ab

2.24 ± 0.59^ab

0.028

63 days old

Thymus index(%)

2.82 ± 0.88^b

3.34 ± 0.48^ab

4.05 ± 1.09^a

3.68 ± 0.68^ab

0.013

Spleen index(%)

1.94 ± 0.34

1.92 ± 0.44

2.02 ± 0.66

2.42 ± 1.74

0.331

Bursa index(%)

1.07 ± 0.21^b

1.58 ± 0.32^a

1.63 ± 0.46^a

1.46 ± 0.30^ab

0.017