1997 Fiscal Year Final Research Report Summary

Quantitative Evaluation and Modeling about Forest Floor Effects on Soil Acidification Induced by Acid Precipitation

Research Project

Project/Area Number	08650648
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Civil and environmental engineering
Research Institution	KYOTO UNIVERSITY
Principal Investigator	HORIUCHI Masato KYOTO UNIVERSITY Faculty of Engineering Instructor, 工学研究科, 助手 (00157059)
Project Period (FY)	1996 – 1997
Keywords	acid precipitation / forest floor / humic substances / forest ecosystem process / aluminum desolution / aluminum speciation / model simulation / future prediction
Research Abstract	Referring to the SMART model, the organic layr model was developed to describe acidification of forest organic layr. The organic layr model and the modified SMART model were combined to evaluate forest soil acidification more properly. This new model is called two layr model. Considering ecosystem processes concerned to acidification or neutralization, ex. nitrogen mineralization, nitrification, nutrient uptake and creation of organic acid, forest soil acidification was predicted for 100years using the two layr model. Model prediction revealed that nitrogen mineralization rates and nitrification rates had strong effects on forest soil acidification and that organic layr neutralized acid deposition. The study for the these three years was summarized and published as the book-style report.