FIGURE 2. Response of aboveground biomass of Stipa
breviflora (a, b), Agropyron mongolicum (c, d),Cleistogenes squarrosa (e, f), and Chenopodium album (g,
h) to nitrogen addition (N) and phosphorus addition (P) in mycorrhizal
(black bars; non-benomyl addition) and mycorrhizal-suppressed (white
bars; benomyl addition) plots in 2019 (a, c, e and g) and 2020 (b, d f
and h). F, fungicide application. Data are presented as means + SE.
*p < 0.05; **p < 0.01; NS p> 0.05.