Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Goro Iwatsubo"'
Publikováno v:
Water, Air, and Soil Pollution. 130:649-654
To analyze the differences in the status and processes of nitrogen saturation in Japan and northeastern United States, we examined the hydrobiogeochemistry of nitrogen of forested watersheds in these regions. Two distinct differences were found betwe
Publikováno v:
Water, Air, and Soil Pollution. 130:715-720
We evaluated the element budgets in a forested watershed in Jiulianshan, southern China. The element input in bulk precipitation was characterized by high depositions of H+, NH4 +, Ca2+, and SO4 2−, i.e., 400, 351, 299, and 876 eq/ha/yr, respective
Publikováno v:
Ecological Research. 14:361-369
The plant–soil system was studied at different topographic levels (i.e. ridge, backslope and footslope) along a slope in a Cryptomeria plantation. Soil solution chemistry at each representative topographic plot was investigated. Tree height and dia
Autor:
Yasunori Nakagawa, Goro Iwatsubo
Publikováno v:
Journal of Forest Research. 4:115-123
The chemistry of runoff waters from 13 forested watersheds in six regions (four regions from Japan, one from southern China and one from northern Thailand) was evaluated. The Cl− concentrations in runoff waters were higher in those watersheds which
Autor:
Naoko Tokuchi, Goro Iwatsubo
Publikováno v:
Journal of Forest Research. 4:99-106
It is known that soil property varies along the slope. It suggests that soil solution chemistry also differs topographically. To determine the variation in soil solution chemistry within one watershed, soil solution chemistry at the different positio
Publikováno v:
European Journal of Soil Biology. 34:123-131
Spatial variability of soil nitrogen (N) transformation patterns was investigated along a slope of a Cryptomeria japonica plantation. The controlling factors of the soil N transformation patterns were examined by multivariate analysis. Net N minerali
Publikováno v:
ResearcherID
Because of measurement difficulties, only a few studies on natural ¹⁵N abundance (δ¹⁵N) of inorganic N in forest soil have been pursued despite its importance for interpretations of plant δ¹⁵N signatures. To investigate stable N isotope ra
Publikováno v:
Tropics. 8:81-92
Studies on hydrobiogeochemistry were carried out in a hill-evergreen forest in northern Thailand. In this study forest climate conditions are characterized by a clear seasonal pattern of precipitation with dry and rainy season. Chemical properties of
Publikováno v:
Geochimica et Cosmochimica Acta. 61:5043-5050
The 15N natural abundance method was used to assess the intermittent occurrence of denitrification in the Kiryu watershed in Shiga Prefecture, Japan. The concentration and isotopic composition (° 15N) of NO3− −N, as well as some physical and che
Publikováno v:
Forest Ecology and Management. 97:39-51
Nitrogen biogeochemistry of 24 forested sites in Japan was used in evaluating the status of ‘nitrogen saturation’ for this region. Bulk deposition of inorganic N ranged from 3.5 to 10.5 kg N ha −1 yr −1 and losses in drainage waters ranged fr