Data are presented as mean ± SD (depth and slope positon n = 9, forest
type n = 12). Different lowercase letters in the same column represent
significant differences at P ≤ 0.05, and different uppercase
letters represent significant differences at P ≤ 0.01. One-way
ANOVA was used for the statistical test. NA, Camellia oleiferanew afforestation; GLF, Gardenia jasminoides in a low-yieldingC. oleifera forest; LF, low-yielding C. oleifera forest;
GNA, G. jasminoides in C. oleifera new afforestation.
NH4–N, soil ammonia nitrogen; NO3–N,
soil nitrate nitrogen; NO2–N, soil nitrate nitrogen;
AN, alkaline hydrolysable nitrogen; AK, available potassium; AP,
available phosphorus.