3.2.1 Herb plants communities
There were 33 species of herb plants were investigated in this experiment (Table 2). N addition significantly altered the dominance of the first five plants in Table 2 (P <0.05), which were Chrysosplenium sinicum, Aegopodium alpestre, Dryopteris crassirhizoma, Eranthis stellata andPhryma leptostachya . Compared with CK, 9.1% of the species were not detected in the LN treatment, 27.3% in the MN treatment, and 33.3% in the HN treatment.