Carbon dynamics and budget in a Miscanthus sinensis grassland in Japan

Yukihiro Yazaki*, Shigeru Mariko, Hiroshi Koizumi

*この研究の対応する著者

研究成果: Article査読

63 被引用数 (Scopus)

抄録

We investigated the carbon dynamics and budget in a grassland of Miscanthus sinensis, which is widely distributed in Japan, over a 2-year period (2000-2001). Plant biomass began to increase from May and peaked in September, then decreased towards the end of the growing season (October). Soil respiration rates also exhibited seasonal fluctuations that reflected seasonal changes in soil temperature and root respiration. The contribution of root respiration to total soil respiration was 22-41% in spring and summer, but increased to 52-53% in September. To determine the net ecosystem production (carbon budget), we estimated annual net primary production, soil respiration, and root respiration. Net primary production was 1207 and 1140 g C m-2 in 2000 and 2001, respectively. Annual soil respiration was 1387 g C m-2 in 2000 and 1408 g C m-2 in 2001; root respiration was 649 and 695 g C m -2 in 2000 and 2001, respectively. Moreover, some of the carbon fixed as net production (457-459 g C m-2) is removed by mowing in autumn in this grassland. Therefore, the annual carbon budget was estimated to be -56 g C m-2 in 2000 and -100 g C m-2 in 2001. These results suggest that the Miscanthus sinensis grassland in Japan can act as a source of CO2.

本文言語English
ページ(範囲)511-520
ページ数10
ジャーナルEcological Research
19
5
DOI
出版ステータスPublished - 2004 9月
外部発表はい

ASJC Scopus subject areas

  • 生態学

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