講演詳細

造林部門[Silviculture]

日付	2026年3月18日
開始時刻	10:30
会場名	中ホール200
講演番号	E-6
発表題目	Changes in Soil Nitrogen Dynamics after Clearcutting and Reforestation at the Hitachi Ota Experimental Site Changes in Soil Nitrogen Dynamics after Clearcutting and Reforestation at the Hitachi Ota Experimental Site
所属	Kyoto University
要旨本文	Clear-cutting can strongly influence nitrogen cycling, while atmospheric nitrogen deposition further alters nitrogen dynamics. Several studies in Japan have reported nitrogen saturation in forest ecosystems. However, nitrogen dynamics associated with logging in nitrogen-saturated watersheds remain poorly understood. This study aims to investigate changes in soil physical properties and nitrogen-related characteristics in a nitrogen-saturated watershed at the Hitachi-Ota Experimental Forest, Ibaraki Prefecture, Japan. In February 2024, a mature Japanese cedar (Cryptomeria japonica) plantation was clear-cut, and an adjacent uncut plantation served as a control. Soil samples were collected before clear-cutting and during the first year and second years after clear-cutting. Samples were collected separately from upper, middle, and lower slope positions. Soil water content, pH, nitrogen-related properties, and C/N ratio were measured using standard incubation and extraction methods.
著者氏名	○MYO LINN TIN1 ・ Tomoki Oda3 ・ Yusei Morohashi1 ・ Sosuke Kitahara2 ・ Tomohiro Yokobe4 ・ Mitsuki Fujimura1 ・ Sho Iwagami3 ・ Naoko Tokuchi4
著者所属	1Graduate school of Agriculture, Kyoto University ・ 2Graduate School of Global Environmental Studies, Kyoto University ・ 3Forestry and Forest Products Research Institute ・ 4Field Science Education and Research Center, Kyoto University (FSERC)
キーワード	Nitrogen Dynamics, Clearcutting, Reforestation, Soil, Hitachi Ota Experimental Site
Key word	Nitrogen Dynamics, Clearcutting, Reforestation, Soil, Hitachi Ota Experimental Site