The amount and seasonal changes of phenolic compounds leached from larch trees by rain
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概要
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We collected throughfalls and stemflows every month at larch forests in the Okutama Experimental Forest of the Tokyo University of Agriculture, from December 1996 to November 1998. The concentration and the amount of phenolic compounds were analyzed with the Folin-Denis method, ion-exchange chromatography method and so on. The concentration of total phenolics in stemflows was higher than that in throughfalls. On the other hand, the amount of total phenolics in throughfalls was larger than that at stemflows, because the amount of throughfall was larger than that of stemflow. The amount of dissolved total phenolics in both throughfalls and stemflows tended to be high with much rainfall, but not to be clearly related to the fluctuation of the amount of NO<SUB>3</SUB><SUP>-</SUP> and nss-SO<SUB>4</SUB><SUP>2-</SUP> deposition. The concentrations of fourteen kinds of phenolic compounds which were collected in June 1998 were investigated, and consequently six kinds of phenolic acid were found among them. The concentration of phenolic acid was very low around 10-7 M. It appears that even the low concentrations of acid lead to allelopathic effects in the larch forest ecosystem.
- 社団法人 環境科学会の論文
社団法人 環境科学会 | 論文
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