3.1.2 Coarse fiber and ash
The coarse fibers content of L. chinensis showed an overall downward trend with N addition rates increasing (Fig.1C). Compared with the control, the coarse fibers content reduced by 1.0 % to 16.3 % with N addition increasing, but there was no significant differences between most test treatments (P >0.05).
It was different from the protein, fat and coarse fibers, there was almost no significant difference in the ash content of L. chinensis under different N addition treatments (Fig.1D). In MSSL, the ash content of L. chinensis was kept 4%-5%, and N addition had little effect on ash content of L. chinensis .