N absorption capacity of the degraded alpine meadow
Plant N absorption in the degraded alpine meadow was significantly
greater than that the undegraded alpine meadow. 15N
absorption showed the same pattern; in the degraded alpine meadow, the
plant 15N concentration was significantly higher than
those in the undegraded alpine meadow. These results are consistent with
those of previous studies (Lilles et al. 2014; Zhou et al. 2021),
indicating that plant in the degraded alpine meadows underwent
directional selection of high N absorption in low N environments,
resulting in a significantly greater N absorption capacity in these
habitats than that in undegraded alpine meadows.