Exchange of Proton and Major Elements in Two‐Layer Canopies Under Acid Rain in a Subtropical Evergreen Forest in Central‐South China

Canopy exchanges of H+ and N (NH4+‐N, NO3−‐N) and other major ions were evaluated and quantified in two‐layer canopies based on throughfall measurements in Shaoshan Forest during the period 2000–2002, central‐south China. The collected annual rainfall, throughfall, and sub‐throughfall were 1401,1191, and 1 084 mm/year, respectively. Fifteen percent and 8% of rainfall (or 9% of throughfall) were intercepted by the top canopy and sub‐canopy …