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Elucidation of Soil Factors Supporting Safe and High-Quality Production of Special Local Tea in Northern Vietnam

Research Project

Project/Area Number 16H05809
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Environmental agriculture(including landscape science)
Research InstitutionKochi University

Principal Investigator

IWASAKI Kozo  高知大学, 教育研究部総合科学系生命環境医学部門, 教授 (40193718)

Co-Investigator(Kenkyū-buntansha) 田中 壮太  高知大学, 教育研究部総合科学系黒潮圏科学部門, 教授 (10304669)
島村 智子  高知大学, 教育研究部総合科学系生命環境医学部門, 准教授 (50350179)
康 峪梅  高知大学, 教育研究部総合科学系生命環境医学部門, 教授 (70284429)
上野 大勢  高知大学, 教育研究部総合科学系生命環境医学部門, 准教授 (90581299)
Research Collaborator MINH dang van  タイグエン大学, 農学部, 教授
CHIEN hoang huu  愛媛大学, 連合農学研究科
OHTOMO risa  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
OKUMURA kaho  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
YAMANE kana  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
SHIBAHARA kazuo  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
TOKUDA maho  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
MURATA keiichiro  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
NAGASAWA momoko  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
NAKASHIMA moe  高知大学, 農学部, 土佐さきがけプログラム, 学士課程学生
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords土壌学 / 植物生育環境学 / 食品化学 / 農林水産物 / ベトナム / 緑茶 / Camellia sinensis / 茶園 / 植物栄養学 / 茶 / 茶葉
Outline of Final Research Achievements

At special local tea production areas in Thai Nguyen Province, Vietnam, tea gardens were selected from the areas where the tea leaves have received high and low market valuation (Tan Cuong and Song Cau), respectively. Soil survey was conducted at each tea garden and the soil physicochemical properties were analyzed. Tea leaves were collected at the same time, and focusing on the Trung Du cultivar, quality of the tea leaves was evaluated by the mineral composition, concentrations of total polyphenols, catechins and theanine, and antioxidative activity in the infusion. Based on the analyses of the relationships between the geographical conditions and soil properties of the tea garden and the tea quality, some measures for soil amelioration and for improvement of tea quality in the area of low market valuation were proposed.

Academic Significance and Societal Importance of the Research Achievements

Tan Cuong茶はベトナムの特産緑茶であるが,良質な特産茶葉が生産される地域は限られており,周辺地域で同じ品種の茶樹を同様に栽培・管理しても品質が劣ると言われている。この理由を明らかにするために,市場評価の異なる茶葉生産地の茶園における土壌の理化学性および茶葉の各種元素含有率,機能性成分の濃度等を調査した。本研究は,土壌環境要因と生産物である茶葉の品質の関係を明らかにしようとした点で学術的意義がある。また,得られた結果に基づき,品質が劣る生産地域に対する土壌改良指針等を提示することで,ベトナム・Thai Nguyen省における茶産業の振興に寄与することができる.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (8 results)

All 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Thai Nguyen University(ベトナム)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] タイグエン大学(ベトナム)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] タイグエン大学/ハノイ科学大学(ベトナム)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Soil physicochemical properties in a high-quality tea production area of Thai Nguyen province in northern region, Vietnam2018

    • Author(s)
      Huu Chien Hoang、Tokuda Maho、Van Minh Dang、Kang Yumei、Iwasaki Kozo、Tanaka Sota
    • Journal Title

      Soil Science and Plant Nutrition

      Volume: 65 Issue: 1 Pages: 73-81

    • DOI

      10.1080/00380768.2018.1539310

    • NAID

      210000012051

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ベトナム北部タイグエン省の茶園で栽培された茶葉の品質と茶園土壌の性質2019

    • Author(s)
      大友理佐,奥村夏帆,山根佳奈,Hoang Huu Chien,Dang Van Minh,島村智子,田中壮太,岩崎貢三
    • Organizer
      日本土壌肥料学会2019年度静岡大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Soil chemical properties in a high quality tea-production area of Thai Nguyen province, Vietnam2018

    • Author(s)
      Chien, H.H., M. Tokuda, D.V. Minh, Y. Kang, K. Iwasaki, and S. Tanaka
    • Organizer
      International Symposium on Plant-Soil Interactions at Low pH
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ベトナム・タイグエン省 Tan Cuong村周辺の茶園において採取した茶葉中の各種養分含有率2017

    • Author(s)
      長澤桃子・中嶋萌絵・Hoang Huu Chien・Dang Van Minh・上野大勢・康 峪梅・田中壮太・岩崎貢三
    • Organizer
      日本土壌肥料学会関西支部会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Basic information on soil morphological and chemical properties in special-tea-production gardens, Thai Nguyen Vietnam2017

    • Author(s)
      Hoang Huu Chien, Maho Tokuda, Dang Van Minh, Yumei Kang, Kozo Iwasaki, Sota Tanaka
    • Organizer
      日本土壌肥料学会関西支部会
    • Related Report
      2017 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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