Traits mechanisms
Traits’ mechanisms were checked for each species under each treatment and their combinations within monoculture, give us some variable results (Fig. 5). F and N reduced the root weight ratio (RWR) of WT (-33.91%, -37.73%) and WC (-83.4%, -90.1%). F increased shoot weight ratio (SWR), relative growth rate of dry weight (RGRB) and relative growth rate of shoot (RGRS) of WT (33.9%, 87.2% and 94.2%) and WC (83.4%, 29.6%, and 10%). N reduced the RGRB, RGRS and RWR of WC(-59.9%, -18.1%, -90.2%). RGRB and RGRS increased in WT (79.3%, 94.5%). The combination of flooding and additional nitrogen (F.N, F.2N) decreased the RGRB of WC (-94.25%, -92.0%), but increased the RGRB of WT (42.0%, 33.9%) compared with CK (Fig. 5).