Life cycle adjustments controlling the periodic variations in blueberry stem diameter

• Project/Area Number: 26450360
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Agricultural environmental engineering/Agricultural information engineering
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Chosa Tadashi 東京農工大学, (連合)農学研究科(研究院), 准教授 (10355597)
• Co-Investigator(Kenkyū-buntansha): 伴 琢也 東京農工大学, 農学部, 准教授 (20325046)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: ブルーベリー / 茎径計測 / 周期変動 / 環境制御 / モデル / 肥大成長 / モデル化 / 休眠期 / 萌芽期 / 個体管理 / 光環境

Outline of Final Research Achievements

This study investigated how an artificial light environment influenced changes in blueberry stem diameter from dormancy to the embryonic stage. Periodic changes in stem diameter not related to leaf development were confirmed. A model of the changes in stem diameter induced by environmental factors was developed. A cantilever-type displacement monitor with a strain gauge was used to obtain non-destructive continuous measurements of stem diameter, together with a pressure-sensitive conductive elastomer sensor. The findings also verified that this monitoring method is simpler to use than existing stem-diameter measuring devices.

Research Products

• [Presentation] Changes in stem diameter of blueberries from dormant period to bud opening (2016)
  • Author(s): Minoru Shimizu, Tadashi Chosa, Seishu Tojo
  • Organizer: CAFEi 2016 (3rd International Conference on Agricultural and Food Engineering)
  • Place of Presentation: Seri Pacific Hotel, Kuala Lumpur, Malaysia
  • Year and Date: 2016-08-23
  • Int'l Joint Research
• [Presentation] Development and evaluation of a simple sensor for measuring stem diameter using a rubber sheet and a strain gauge (2016)
  • Author(s): Minoru Shimizu, Tadashi Chosa, Seishu Tojo
  • Organizer: ISMAB (International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering) 2016
  • Place of Presentation: TOKI MESSE Niigata Convention Center, Niigata, Japan
  • Year and Date: 2016-05-23
  • Int'l Joint Research
• [Presentation] 萌芽期のブルーベリーの茎径変化 (2015)
  • Author(s): 清水稔・帖佐直・東城清秀
  • Organizer: 農業環境工学関連5学会2015年合同大会
  • Place of Presentation: 岩手大学教育学部（岩手県盛岡市）
  • Year and Date: 2015-09-14
• [Presentation] ブルーベリーの生育モニタリングに関する研究－ゴムシートを用いた茎周囲長計測－ (2015)
  • Author(s): 清水稔・帖佐直・東城清秀
  • Organizer: 農業食料工学会関東支部第51回年次大会
  • Place of Presentation: 日本大学生物資源学部（神奈川県藤沢市）
  • Year and Date: 2015-08-05
• [Presentation] Individual Control of Orchard Tree: Element Technology Targeting Blueberry Bushes (2014)
  • Author(s): Tadashi Chosa
  • Organizer: 2nd International Conference on Agricultural and Food Engineering
  • Place of Presentation: Kuala Lumpur, Malaysia
  • Year and Date: 2014-12-01 – 2014-12-03
  • Invited
• [Presentation] ブルーベリーの茎径周期変化のモニタリング (2014)
  • Author(s): 清水稔・帖佐直・東城清秀
  • Organizer: 電子情報通信学会技術研究報告
  • Place of Presentation: 機械振興会館，東京都港区
  • Year and Date: 2014-11-16 – 2014-11-17