Clarification of the mechanisms of variations in radial growth and wood properties of Cryptomeria japonica and Chamaecyparis obtusa due to climate change

2017 Fiscal Year Final Research Report

• Project/Area Number: 26292092
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Wood science
• Research Institution: Shinshu University
• Principal Investigator: Yasue Koh 信州大学, 学術研究院農学系, 准教授 (00324236)
• Co-Investigator(Kenkyū-buntansha): 桃井 尊央 東京農業大学, 地域環境科学部, 助教 (00445694) ; 小林 元 信州大学, 学術研究院農学系, 准教授 (40325494) ; 斎藤 琢 岐阜大学, 流域圏科学研究センター, 助教 (50420352)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 気候変動 / 年輪年代学 / スギ・ヒノキ / フラックス / 温暖化 / 光合成 / フェノロジー / 同位体ラベリング

Outline of Final Research Achievements

To clarify the mechanisms of variations in radial growth of Cryptomeria japonica and Chamaecyparis obtusa due to climate change, we conducted three experiments. The seasonal changes in photosynthesis parameters and in radial growths were observed and photosynthesis models were developed for every months. Seasonal changes in translocation of photosynthate to xylem were observed by stable isotope tracing techniques. The changes in Gross Primary Production (GPP) by temperature changes were estimated by a carbon balance model which based on forest carbon flux measurement at TKC site. The results revealed good synchronization between GPP and radial growth that were mainly affected by temperature from winter to spring. The physiological observations on photosynthesis and translocation of photosynthate also consistent with the statistical results. The carbon balance model and observed physiological parameters have potential development of a forecasting model of radial growth changes.

Free Research Field

木質科学