Figure 3

Random Forest to rank the relative importance of influence factors on NRE (a and b) and PRE (c and d) in two dominant species. Sb: Stipa breviflora; Cs: Cleistogenes songorica. SM: soil moisture; STN: soil total nitrogen; STP: soil total phosphorus; TNg: green leaf nitrogen; TPg: green leaf phosphorus; TNs: senesced leaf nitrogen; TPs: senesced leaf phosphorus.