Table 2 Effects of PPL on basic physiological indexes

Daily gain

D1

0.33_e^b

0.32_d^b

0.32_e^b

0.84^a

0.027

D2

0.47_d^b

0.50_c^b

0.50_d^b

0.87^a

0.031

D3

0.51_d^c

0.63_b^b

0.64_c^b

0.86^a

0.022

D4

0.55_c,d^c

0.65_b^b

0.69_b,c^b

0.86^a

0.019

D5

0.62_b,c^c

0.71_a,b^b

0.70_b,c^b

0.82^a

0.021

D6

0.64_a,b^c

0.76_a^b

0.75_a,b^b

0.84^a

0.024

D7

0.71_a^b

0.79_a^a,b

0.80_a^a,b

0.85^a

0.030

P (dose)

 < 0.001

P (time)

 < 0.001

P (dose × time)

 < 0.001