Examination of the method for measuring soil respiration in cultivated land: Effect of carbon dioxide concentration on soil respiration

Toshie Nakadai, Hiroshi Koizumi, Youzou Usami, Mitsumasa Satoh, Takehisa Oikawa

研究成果: Article

42 引用 (Scopus)

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An acceleration of soil respiration with decreasing CO2 concentration was suggested in the field measurements. The result supporrs that obtained in laboratory experiments in our previous study. The CO2 concentrations in a chamber of the alkali absorption method (the AA-method) were about 150-250 parts/106 lower than that in the atmosphere (about 350 parts/106), while those observed in the open-flow IRGA method (the OF-method) were nearly equal to the soil surface CO2 levels. The AA-method at such low CO2 levels in the chamber appears to overestimate the soil respiration. Our results showed that the rates obtained by the AA-method were about twice as large as those by the OF-method in field and laboratory measurements. This finding has important consequences with respect to the validity of the existing data obtained by the AA-method and the estimation of changes in the terrestrial carbon flow with elevated CO2

元の言語English
ページ(範囲)65-71
ページ数7
ジャーナルEcological Research
8
発行部数1
DOI
出版物ステータスPublished - 1993 4
外部発表Yes

ASJC Scopus subject areas

  • Ecology

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