Chemical Characteristics in Stemflow of Japanese Cedar in Japan.

Nakanishi, Asami; Shibata, Hideaki; Inokura, Yoji; Nakao, Toshio; Toda, Hiroto; Satoh, Fuyuki; Sasa, Kaichiro

To clarify the characteristics in stemflow of Japanese cedar (Cryptomeria japonica), we conducted the annual and extensive observation. We examined the chemistry of bulk and wet deposition, throughfall and stemflow at 26 forested sites in June and September 1998. The each sampling site was broadly distributed in all over the Japanese archipelago. The stemflow pH of Japanese cedar was significantly lower (p<0.01) than precipitation and stemflow of broad-leaved species in both months. There were significant anion deficits in stemflow of Japanese cedar, suggesting that organic anions derived from plant sources play an important role in the stemflow acidity. Our results suggested that the strong stemflow acidity in Japanese cedar was derived from an internal biological characteristic rather than influences of external acidic deposition.

JAPAN; CRYPTOMERIA japonica; TAXODIACEAE; CONIFERS; ANIONS; ACID deposition

Water, Air & Soil Pollution, 2001, Vol 130, Issue 1-4, p709

0049-6979

Academic Journal

10.1023/A:1013829401020