Study on mass transfer-storage characteristic of trees in soil-plant-atmosphere continuum using physical sensors

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06292
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 41030:Rural environmental engineering and planning-related
• Research Institution: Tottori University
• Principal Investigator: SAITO Tadaomi 鳥取大学, 農学部, 准教授 (70515824)
• Co-Investigator(Kenkyū-buntansha): 依田 清胤 石巻専修大学, 理工学部, 教授 (30254832) ; 猪迫 耕二 鳥取大学, 農学部, 教授 (60243383) ; 竹村 圭弘 鳥取大学, 農学部, 准教授 (70731545) ; 藤巻 晴行 鳥取大学, 乾燥地研究センター, 教授 (90323253)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 土壌・植物・大気連続系 / 樹木 / 樹体水分 / 樹液流速 / 水ポテンシャル / 電気伝導度 / 膨圧 / 幹直径

Outline of Final Research Achievements

The objective of this study was to elucidate the water use characteristics and mechanisms of trees and to obtain new knowledge on mass transfer and storage through comprehensive non-destructive and continuous observations of the "driving force," "flow," and "storage" of mass transfer inside and outside the tree body using newly developed sensors. Observations were conducted under natural and moisture stress conditions on a Japanese white oak (Quercus myrsinifolia) and Japanese peers (Pyrus pyrifolia). The results revealed the characteristics of diurnal and seasonal variations in various water status indices and mass transfer mechanisms in response to weather conditions and water stress.

Free Research Field

土壌水文

Academic Significance and Societal Importance of the Research Achievements

土壌・植物・大気連続系における物質移動の機構解明は重要な課題であるが，特に植物体を通じた物質移動については数多くの未解明点が存在している．樹木の水利用特性や物質移動機構の解明は，森林水文，生態系保全，気候変動応答といった多分野における発展性・実用性を有している．また，気象条件やストレスに対する各水分状態指標の変動特性が明らかとなり，これは各センサ類を用いた精密農業（効率的な灌漑，高品質果樹の生産）へと寄与すると期待される．