As shown in Table 4, no significant differences (P >
0.05) occurred in BW gain and FI among the treatments
in the periods of 1 to 21 d, 22 to 42 d, and the
overall period of 1 to 42 d. With regard to F:G, there
was no significant difference (P > 0.05) among treatment
groups in the period of 1 to 21 d; however, lower
(P < 0.05) F:G in the FR2 group was observed than
that of the control and NF groups in the period of 22
to 42 d and the overall period of 1 to 42 d.