モンゴルの半乾燥ステップにおける禁牧が地上部バイオマスと植生の構成および日中の総一次生産へ与える影響

DOI 日本農学文献記事索引 Web Site Web Site 被引用文献2件 参考文献19件
  • URANO Tadaaki
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • HIROTA Mitsuru
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • ISHGALDAN Byambakhuu
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • LI Sheng-Gong
    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
  • ASANUMA Jun
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • MARIKO Shigeru
    Faculty of Social Sciences, Hosei University
  • SUGITA Michiaki
    Graduate School of Life and Environmental Sciences, University of Tsukuba
  • OIKAWA Takehisa
    Graduate School of Life and Environmental Sciences, University of Tsukuba

書誌事項

タイトル別名
  • Effects of exclosure on aboveground biomass, vegetation constitution, and midday gross primary productivity in semi-arid Mongolian steppe

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We examined the effects of grazing on aboveground biomass (AGB), vegetation constitution, and gross primary productivity (GPP) at midday in midsummer on a Mongolian steppe with mixed vegetation consisting of C3 and C4 plants. A grazed area (GA) and a nongrazed area (NGA) created by an exclosure were established in 2002 on land with a history of conventional grazing management. AGB of the mixed C3-C4 vegetation was determined in the GA and NGA from 2003 to 2006. Nongrazing resulted in increased AGB and a decreased ratio of C4 AGB to total AGB. In 2003 and 2006 a dynamic closed-chamber method was used to measure midday GPP; there was no significant difference between the GA and NGA in either year. Partitioning analysis of midday GPP to C3 and C4 photosynthesis indicated that exclosure exerted little influence on the midday GPP in midsummer, because the enhancement of GPP by increased AGB was offset by the reduced AGB of C4 plants.

収録刊行物

  • 農業気象

    農業気象 66 (4), 227-236, 2010

    日本農業気象学会

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