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Photosynthesis and dry matter production in Tibet of China, and the effect of CO_2 enrichment for them

Research Project

Project/Area Number 12575018
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field 作物学
Research InstitutionHokkaido University

Principal Investigator

IWAMA Kazuto  Hokkaido Univ., Grad. School of Agri., Prof., 大学院・農学研究科, 教授 (70144219)

Co-Investigator(Kenkyū-buntansha) OH Shuho  Hokkaido Univ., Grad. School of Agri., Associate Prof., 大学院・農学研究科, 講師 (30301873)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥9,900,000 (Direct Cost: ¥9,900,000)
Fiscal Year 2001: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2000: ¥5,700,000 (Direct Cost: ¥5,700,000)
KeywordsChina / CO_2 enrichment / dry matter production / grain yield / open top chamber / photosynthesis / Tibet / wheat / 気孔 / 光合成速度 / CO_2増加 / 窒素濃度 / チベット高原 / 蒸散速度 / 二酸化炭素濃度 / バレイショ
Research Abstract

Climatic condition of Tibet plateau (3500-4000 m in sea level) holds a unique position for agriculture. Contents of CO_2 and O_2 are 60 to 70 % relative to flats of 0 m sea level, the solar radiation in summer is very high usually beyond 2000 μ mol m^<-2> sec^<-1> and the temperature difference between day and night is often beyond 20℃. The aim of the present research was to clarify these particular conditions for the photosynthesis and dry matter production of crops cultivated in this area in the present and the future. The experiment was conducted at the experimental farm in Lhasa (3700 m in sea level), located by Chinese Academy of Science, with open top chambers of enriched (1.55 times higher) and control (normal air) CO2 content growing a local variety of spring wheat. Mean net photosynthetic rate during the growing season was increased by CO2 enrichment, 19.5μ mol m^<-2> sec^<-1> in the control chamber and 26.9μ mol m^<-2> sec^<-1> in the enriched chamber. However, the total dry weight at the heading stage and the grain yield at the harvesting stage were almost the same in the two chambers, 1401〜1472 g m^<-2> and 610〜702 g m^<-2>, respectively. It was mainly due to higher rate of blighted tillers before heading stage in the enriched CO_2 plants relative to the control plants. The results indicated that main limiting factor for grain yield in this region was not low CO_2 content, but low soil nutrient condition.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 藤村恵人: "CO_2倍増が中国チベット高原における春コムギの光合成速度に及ぼす影響"育種・作物学会北海道談話会会報. 42. 77-78 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 藤村恵人: "中国チベット高原における春コムギの光合成と物質生産に及ぼすCO_2増加の影響 1.圃場に設置したCO_2付加装置の概略"日本作物学会紀事. 71(別1). 66-67 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 藤村恵人: "中国チベット高原における春コムギの光合成と物質生産に及ぼすCO_2増加の影響 2.純光合成速度と収量に及ぼす影響"日本作物学会紀事. 71(別1). 68-69 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 藤村恵人: "春播きコムギの北海道品種とチベット品種における収量ポテンシャルの比較"育種・作物学会北海道談話会会報. 43. 63-64 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 藤村恵人: "春播コムギの北海道品種とチベット品種における収量ポテンシャルの比較"日本作物学会紀事. 72(別1)(印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fujimura S., K. Iwama, S.O., T. Hasegawa and Y. Jitsuyama: "Effect of CO_2 doubling on the photosynthesis of spring wheat in Tibet plateau"Report of the Hokkaido Branch, The Japanese Society of Breeding and Hokkaido Branch, The Crop Science Society of Japan. Vol.42. 77-78 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fujimura S., P. Shi, K. Iwama, X. Zhang, J. Yamaguchi, Y. Liu, X. Wang, Z. Zhong and T. Ebisawa: "Effects of CO_2 enrichment on photosynthesis and dry matter production of spring wheat in Tibet plateau 1. Equipment for CO_2 enrichment"Japanese Journal of Crop Science. Vol.71(Extra 1). 66-67 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fujimura S., P. Shi, K. Iwama, X. Zhang, J. Yamaguchi, Y. Liu, X. Wang and Z. Zhong: "Effects of CO_2 enrichment on photosynthesis and dry matter production of spring wheat in Tibet plateau 2. Effects on net photosynthetic rate and yield"Japanese Journal of Crop Science. Vol.71(Extra 1). 68-69 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fujimura S., K. Iwama, H. Kotani and T. Hasegawa: "Comparison of yield potential between Hokkaido variety and Tibet variety in spring wheat"Report of the Hokkaido Branch, The Japanese Society of Breeding and Hokkaido Branch, The Crop Science Socitey of Japan. Vol.43. 63-64 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fujimura S., K. Iwama, H. Kotani and T. Hasegawa: "Comparison of yield potential between Hokkaido variety and Tibet variety in spring wheat"Japanese Journal of Crop Science. Vol.70(Extra 2)(In press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 岩間 和人: "チベット高原南部における冬コムギの成育と収量"日本作物学会紀事. 70・別2. 187-188 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 藤村 恵人: "CO_2倍増が中国チベット高原における春コムギの光合成速度におよぼす影響"日本育種学会・日本作物学会北海道談話会会報. 42. 77-78 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 藤村 恵人: "チベット高原における春コムギの光合成と物質生産に及ぼすCO_2増加の影響 1.圃場に設置したCO_2付加装置の概略"日本作物学会紀事. 71・別1(印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 藤村 恵人: "チベット高原における春コムギの光合成と物質生産に及ぼすCO_2増加の影響 2.純光合成速度と収量に及ぼす影響"日本作物学会紀事. 71・別1(印刷中). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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