講演詳細

造林部門[Silviculture]

日付	2025年3月22日
開始時刻	15:45
会場名	N11
講演番号	E-18
発表題目	Impacts of Planting Density on Carbon Cycling in Early-stage Larix kaempferi Plantations Impacts of Planting Density on Carbon Cycling in Early-stage Larix kaempferi Plantations
所属	Kangwon National University
要旨本文	This study examined the effects of planting density on net ecosystem production (NEP) in 7-year-old plantations of larch (Larix kaempferi) in Korea. The plantations were treated with three different planting densities: LD (2,000 trees ha-1), MD (2,500 trees ha-1), and HD (3,000 trees ha-1). Soil respiration, soil temperature, soil water content, and sapling growth were measured monthly. In HD, net primary production (NPP) was the highest among treatments at 0.90 t C ha-1 y-1, whereas NEP was the lowest at -4.08 t C ha-1 y-1. NEP in LD and MD were -2.95 and -2.36 t C ha-1 y-1, respectively. We found that, in high planting density treatments, increased litterfall may stimulate soil heterotrophic respiration, leading to a decrease in NEP. This study offers important guidance for determining optimal planting densities to enhance carbon uptake in early-stage larch plantations.
著者氏名	○Kyu Hong Song1 ・ Park Min Woo1 ・ Lim Seung Won1 ・ Lee Sang Tae2 ・ Chung Sang Hoon2 ・ Noh Nam Jin3
著者所属	1Department of Forestry and Environmental Systems, Kangwon National University ・ 2Forest Technology and Management Research Center, National Institute of Forest Science, Republic of Korea ・ 3Division of Forest Science, Kangwon National University
キーワード	biomass, carbon uptake, ecosystem production, larch, soil respiration
Key word	biomass, carbon uptake, ecosystem production, larch, soil respiration