|| 要旨トップ | 目次 |||日本生態学会第65回全国大会 (2018年3月、札幌) 講演要旨
一般講演（口頭発表） B02-10 （Oral presentation）
Shifting cultivation is an important livelihood for people living around and within forested landscape in most developing countries including Myanmar. However, with population increase and land-use changes, fallow period has been reduced to some extent beyond sustainability of natural ecosystem. This study aims to examine the changes of vegetation and soil properties in various fallow periods after shifting cultivation comparing with other forest uses and old growth forest (OGF). Diameter and height measurement, and soil sampling were carried out in 6 each plots of 5-year, 8-year and 15-year fallow periods, village-used forests (VF), which were near to village and impacted by human disturbances and OGF in Bago Mountains, Myanmar. One-way ANOVA of SPSS was used to compare the results. This study found that 8-year fallow periods occupied the highest stem density and species richness although mean DBH and total basal area of that were the smallest among study sites. The concentration of total nitrogen (TN) and total carbon (TC) were higher in 15-year than in 5-year and 8-year fallow periods although there was no significant difference in ava. P among study sites. Soil fertility of 15-year fallow period can reach to that of OGF. Nevertheless, 15-year fallow period may require 46 years for its diameter and 25 years for its maximum height to recover to the vegetation status of OGF, if relying only on natural regeneration. The amount of TN and TC in VF were lower than fallow periods and thus it supposed that VF were considerably subjected to human disturbances, and so it needs to formulate the management plan for VF.