Figure 7.Redundancy analysis of fine root
traits and soil properties along
rock fragment content gradient in second and third year. The proportion
explained of Axis 1 and Axis 2 are 26.17% and 0.97%, respectively.
Solid blue lines indicate fine
root traits in each soil depth. Solid red lines indicate soil properties
in each soil depth. Abbreviations for root traits are as follow: FRB,
fine root biomass; RLD, fine root length density; SRL, specific fine
root length; RD, fine root diameter; RTD, fine root tissue density; RFC,
rock fragment content; SWC, soil water content; TC, total soil carbon;
TN, total soil nitrogen; TP, total soil phosphorus; DOC, soil soluble
carbon; NH4-N, soil ammonium nitrogen;
NO3-N, soil nitrate nitrogen; aP, soil available
phosphorus.