Figure 4. Plant N status at the species level for eight dominant species in response to nitrogen and water addition in a semi-arid grassland of northern China.

C3 grasses: A.c., A.s., S.g., and P.a.; C3 sedge: C.k.; C4 grass: C.s.; C3 forb: P.b. and A.t. Error bars represent 1 SE. Repeated measurement ANOVA P values are reported when P ≤ 0.05.