Abstract
Solute input and output budgets were evaluated for an evergreen broadJeaved forest in southem China. Inputs and outputs varied with season, and were linked to water flux pattems. During spring to early summer with high water flow, solute output increased especially for base cations, HCO3-, and Si. The sulfur that accumulated in the watershed (723 eqlhaly) were probably derived from atmospheric sources in the urban and industrial areas in the southwestern part of China. Considering internal cycling, nitrogen was highly retained in the soil (409 eqlha/y). Loss of K was inhibited by internal cycling. Sodium was not held tightly in this ecosystem. For Mg, content in vegetation was high, but production by weathering was also important. Atmospheric Ca input contribute to higher output of Ca.
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