Dauciform roots affect functional traits of Carex filispica under nitrogen and phosphorus fertilization in alpine meadow.

TCD showed a decreasing trend with the increasing N:P ratio (Fig. 1 c), which had a significant difference among the treatments ( p = 0.001, Table 1 ), while the RCD of C. filispica showed a positive correlation and increased ( r = 0.363, Table 1 ).

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As the degradation intensified, the total root length and surface area showed an increasing trend, while volume tended to be stable, indicating that the root system increased its absorbing ability by decreasing diameter and increasing surface area 46 , which helps to adapt to the extreme environment 47 .

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