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島根大学生物資源科学部研究報告 16 巻
2011-09-30 発行
島根大学三瓶演習林に植栽されたスギの個体サイズと樹幹流の水量および水質の関係
Relationships between tree?size parameters and stemflow properties of Japanese red cedar (Cryptomeria japonica D.Don)planted in the Sambe Forest, Shimane University
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We investigated the amount of stemflow and its water chemistry of Japanese red cedar trees planted in the Sambe Forest, Shimane University. Stemflow properties were related to the several tree?size parameters, i.e., DBH, tree crown projection area, tree crown surface area, tree crown volume and plant biomass. Of tree?size parameters, crown surface area showed the highest correlation with the stemflow amount. The electric conductivity (EC) and pH values of the stemflow water were also related to tree?size. EC of stemflow water increased with tree diameter. On the other hand, pH of stemflow decreased with tree diameter. The stemflow chemistry of trees with thinner diameter reflected the condition of precipitation outside forest. This is due to the difference in the water volume, which passed through the crown of cedar trees. Crown of the thinner trees collected more water than that of the thicker trees.
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