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Study about an application of Unified Soil Classification System of Japan aimed for the improvement of an estimation of forest soil carbon stook

应用日本统一土壤分类系统改进森林土壤碳储量估算的研究

基本信息

批准号：
17580056
负责人：
MURATA Tomoyoshi
金额：
$ 2.18万
依托单位：
National Institute for Environmental Studies
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17580056/
关键词：
Soil Science Phenomena of Soil Sphere GIS Land Conservation Analyses Evaluation Soil Classification Soil Organic Matter

项目摘要

Soil organic carbon (SOC) plays an important role in the global C dynamics and in the fertility of agricultural and forest soils. This study was performed to investigate i) the relationship between the stocks of SOC and the stocks of various soil constituents derived from volcanic ash materials, such as Al and Fe constituents extracted by acid oxalate and/or pyrophosphate, the effects of locational condition, such as altitude, slope gradient, and vegetation management on the stocks of various soil constituents derived from volcanic ash materials, to apply to some soil classification systems (Fundamental Land Classification Survey, Forest soil classification system, Unified Soil Classification Systems of Japan, World Reference Base for Soil Resources) and iv) to evaluate each characteristic on the estimation of soil C stock in Okuchichibu mountain zone based on soil survey and soil chemical analyses. As a result, large area classified into Brown Forest Soils by Fundamental Land Classification Survey was proved to be affected by volcanic ash as a soil parent material. Furthermore, soil C stock was apparently significant with soil parent materials and particularly, with the amount of materials derived from volcanic ash. Distribution pattern of volcanic ash soils and soil C stock considerably varied in areas of Okuchichibu mountain zone. That is because of large variation of surface geological characteristics, topographical characteristics and vegetation. In mountain zone composed by steep topographical features, the use of soil classification system that gives priority to the parent materials and detailed understanding of accumulation status of volcanic ash soil are thought to be important to estimate soil C stock.

土壤有机碳（SOC）在全球碳动态和农林土壤肥力中起着重要作用。本研究旨在探讨火山灰源土壤有机碳储量与各种土壤成分储量之间的关系，如酸性草酸盐和/或焦磷酸盐提取的Al和Fe成分，海拔、坡度和植被管理等区位条件对火山灰源土壤各种成分储量的影响，应用于土壤分类系统（基本土地分类调查、森林土壤分类系统、日本统一土壤分类系统、世界土壤资源参考库）;（4）在土壤调查和土壤化学分析的基础上，对奥七部山区土壤碳储量估算的各个特征进行评价。结果，被基本土地分类调查归类为棕色森林土的大面积地区被证明受到火山灰作为土壤母质的影响。此外，土壤C库存与土壤母质，特别是来自火山灰的材料的量显着。火山灰土壤和土壤碳储量的分布格局在奥七部山区有很大的差异。这是由于地表地质特征、地形特征和植被变化较大。在地形陡峭的山区，采用以成土母质为主的土壤分类体系，详细了解火山灰土壤的堆积状况，对估算土壤C储量具有重要意义。