Variations in Amount, pH, EC and Anions of Stemflow in Pinus koraiensis and Larix leptolepis, Korea

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The amount, pH, EC and anions of stemflow in Pinus koraiensis and Larix leptolepis are surveyed and analyzed in order to examine the relationships between watershed conservation function and flood control function of forest in quality and quantity in the Experiment Forests, College of Forest Sciences, Kangwon National University in Korea. Amount and flow rate of stemflow in P. koraiensis have high correlation with rainfall. The pH values of stemflow are much lower than those of rainfall, and EC values of stemflow and throughfall are much higher than those of rainfall. The pH and EC values of throughfall and stemflow are not different between tree species. However, the pH and EC values of rainfall have some influence on those of stemflow. Cl^-, NO_3^- and SO_4^<2-> concentrations of rainfall and throughfall are from 1 to 5ppm, PO_4^<2-> concentrations show 0.57ppm and 0.23ppm in rainfall, 0.12ppm in L. leptolepis. Also, Cl^-, NO_3^- and SO_4^<2-> concentrations of stemflow are relatively higher than those of rainfall, and show differences among seasons. Because these variations indicate that nutrients accumulate in the phloem and that dry depositions of stem or crown are leached and washed off, further study is required to investigate the damaged structure and buffering capacity of trees to acid rain, in order to suggest some strategies for methods of forest reforestation and hydrologic maintenance.
日本雨水資源化システム学会の論文