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plantationAbe, Yukiko*; Liang, N.*; Teramoto, Munemasa*; Koarashi, Jun; Atarashi-Andoh, Mariko; Hashimoto, Shoji*; Tange, Takeshi*
Geoderma Regional (Internet), 29, p.e00529_1 - e00529_11, 2022/06
Times Cited Count：1 Percentile：14.82(Soil Science)This study aimed to clarify the causes of spatial variation in soil respiration rate on volcanic ash soil. From January 2013 to August 2019, soil respiration rates were measured at 40 measuring points periodically at a 35-year-old plantation in Tokyo, Japan. In August 2019, the carbon content of the litter layer, total carbon content of soil organic matter (SOM), carbon content of the low-density fraction (LF-C) of SOM, fine root biomass, and bulk density of soil were measured at all measuring points. Results of the multiple regression analysis showed that the model with only the LF-C as an explanatory variable had the highest capability for predicting the respiration rate at a soil temperature of 20
C, indicating that LF-C, which is considered to be readily available to soil microorganisms, can be the main factor responsible for the spatial variation in soil respiration rate.
Abe, Yukiko*; Liang, N.*; Koarashi, Jun; Atarashi-Andoh, Mariko; Teramoto, Munemasa*; Hashimoto, Shoji*; Tange, Takeshi*
no journal, ,
We measured soil respiration rates (SR) at 21 points in a Cryptomeria japonica plantation of Tokyo University of Agriculture Okutama Forest, from January 2013 to August 2019, and examined temporal changes and factors of spatial variation. The observation showed that the measured points with higher SR in 2013 tended to have higher SR throughout the seven years. There was not significant correlation between the amount of organic carbon in the surface soil and SR. However, the amount of light fraction (
1.6 g cm
) of soil or fine root biomass in the surface soil had a significant positive correlation with SR. Since the light fraction of soil contains organic matter that is easily decomposed by microbes, the variation of the easily decomposable organic matter content was considered to be the cause of the spatial variation in SR.
plantationAbe, Yukiko; Liang, N.*; Teramoto, Munemasa*; Koarashi, Jun; Atarashi-Andoh, Mariko; Hashimoto, Shoji*; Tange, Takeshi*
no journal, ,
no abstracts in English
Abe, Yukiko; Nakayama, Masataka; Tange, Takeshi*; Atarashi-Andoh, Mariko; Koarashi, Jun
no journal, ,
Soil is the largest carbon pool in terrestrial ecosystems, and forest soils in particular play an important role as a C reservoir in the global C cycle. Organic matter in the soil is released to the atmosphere as carbon dioxide through microbial decomposition (heterotrophic respiration). Decomposition of organic matter accumulated in the subsoil may contribute significantly to heterotrophic respiration, but it is not clear. Therefore, the objective of this study was to determine the heterotrophic respiration rate from the surface to the lower layers of forest soils with different parent materials. This presentation will report on the relationship between soil physicochemical and organic matter properties and heterotrophic respiration.
