Abstract
Diurnal and seasonal changes in CO2 exchange between flooding water and the atmosphere are reported in a rice (Oryza sativa) paddy field under ambient and free-air CO2 enrichment (FACE) conditions. Measurements of CO2 exchange were made in a randomized complete-block design experiment with two CO2 mole fractions (ambient; FACE, ambient +200 mmol mol-1) and four blocks. Evolution of CO2 from the flooding water occurred throughout the entire day under ambient CO2, although the rate decreased in the daytime. By contrast, under FACE, CO2 evolution from the flooding water was observed at night, and CO2 absorption from the atmosphere was observed in the daytime. The time course of CO2 exchange was similar to that of solar radiation. The diurnal pattern is similar to that for photosynthesis of terrestrial plant communities. This suggests that photosynthesis of the free-floating weeds and algae in the flooding water is related to the CO2 exchange between the flooding water and the atmosphere. In addition, the amplitude of the diurnal cycle of CO2 exchange was larger under the FACE than under ambient conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 231-239 |
| Number of pages | 9 |
| Journal | New Phytologist |
| Volume | 150 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2001 |
| Externally published | Yes |
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Keywords
- CO flux
- Diurnal change
- Lemna perpusilla
- Rice FACE
- Spirodela polyrhiza
- Spirogyra sp.
ASJC Scopus subject areas
- Plant Science
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
Cite this
Effect of free-air CO2 enrichment (FACE) on CO2 exchange at the flood-water surface in a rice paddy field. / Koizumi, Hiroshi; Kibe, Takeshi; Mariko, Shigeru; Ohtsuka, Toshiyuki; Nakadai, Toshie; Mo, Wenhong; Toda, Hideshige; Seiichi, Nishimura; Kobayashi, Kazuhiko.
In: New Phytologist, Vol. 150, No. 2, 2001, p. 231-239.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of free-air CO2 enrichment (FACE) on CO2 exchange at the flood-water surface in a rice paddy field
AU - Koizumi, Hiroshi
AU - Kibe, Takeshi
AU - Mariko, Shigeru
AU - Ohtsuka, Toshiyuki
AU - Nakadai, Toshie
AU - Mo, Wenhong
AU - Toda, Hideshige
AU - Seiichi, Nishimura
AU - Kobayashi, Kazuhiko
PY - 2001
Y1 - 2001
N2 - Diurnal and seasonal changes in CO2 exchange between flooding water and the atmosphere are reported in a rice (Oryza sativa) paddy field under ambient and free-air CO2 enrichment (FACE) conditions. Measurements of CO2 exchange were made in a randomized complete-block design experiment with two CO2 mole fractions (ambient; FACE, ambient +200 mmol mol-1) and four blocks. Evolution of CO2 from the flooding water occurred throughout the entire day under ambient CO2, although the rate decreased in the daytime. By contrast, under FACE, CO2 evolution from the flooding water was observed at night, and CO2 absorption from the atmosphere was observed in the daytime. The time course of CO2 exchange was similar to that of solar radiation. The diurnal pattern is similar to that for photosynthesis of terrestrial plant communities. This suggests that photosynthesis of the free-floating weeds and algae in the flooding water is related to the CO2 exchange between the flooding water and the atmosphere. In addition, the amplitude of the diurnal cycle of CO2 exchange was larger under the FACE than under ambient conditions.
AB - Diurnal and seasonal changes in CO2 exchange between flooding water and the atmosphere are reported in a rice (Oryza sativa) paddy field under ambient and free-air CO2 enrichment (FACE) conditions. Measurements of CO2 exchange were made in a randomized complete-block design experiment with two CO2 mole fractions (ambient; FACE, ambient +200 mmol mol-1) and four blocks. Evolution of CO2 from the flooding water occurred throughout the entire day under ambient CO2, although the rate decreased in the daytime. By contrast, under FACE, CO2 evolution from the flooding water was observed at night, and CO2 absorption from the atmosphere was observed in the daytime. The time course of CO2 exchange was similar to that of solar radiation. The diurnal pattern is similar to that for photosynthesis of terrestrial plant communities. This suggests that photosynthesis of the free-floating weeds and algae in the flooding water is related to the CO2 exchange between the flooding water and the atmosphere. In addition, the amplitude of the diurnal cycle of CO2 exchange was larger under the FACE than under ambient conditions.
KW - CO flux
KW - Diurnal change
KW - Lemna perpusilla
KW - Rice FACE
KW - Spirodela polyrhiza
KW - Spirogyra sp.
UR - http://www.scopus.com/inward/record.url?scp=0035042938&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035042938&partnerID=8YFLogxK
U2 - 10.1046/j.1469-8137.2001.00104.x
DO - 10.1046/j.1469-8137.2001.00104.x
M3 - Article
AN - SCOPUS:0035042938
VL - 150
SP - 231
EP - 239
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 2
ER -