Photosynthetica 2005, 43(3):435-438 | DOI: 10.1007/s11099-005-0069-z

Seed yield of soybeans with daytime or continuous elevation of carbon dioxide under field conditions

J. A. Bunce1
1 Crop Systems and Global Change Laboratory, B-001 USDA, Beltsville Agricultural Research Center, Beltsville, USA

Some studies of responses of plants to elevated concentrations of carbon dioxide (EC) added CO2 only in the daytime, while others supplied CO2 continuously. I tested whether these two methods of EC treatments produced differences in the seed yield of soybeans. Tests were conducted for four growing seasons, using open top chambers, with soybeans rooted in the ground in field plots. One third of the chambers were flushed with air at the current ambient [CO2] (AC), one third had [CO2] 350 µmol mol-1 above ambient during the daytime (ECd), while one third had [CO2] 350 µmol mol-1 above ambient for 24 h per day (ECdn). ECdn increased seed yield by an average of 62 % over the four years compared with the AC treatment, while ECd increased seed yield by 34 %. Higher seed yield for ECdn compared with ECd occurred each year. In comparing years, the relative yield disadvantage of ECd decreased with increasing overall seed yield. On days with high water vapor pressure deficits, soybean canopies with ECd had smaller midday extinction coefficients for photosynthetically active radiation than canopies with ECdn, because of a more vertical leaf orientation. Hence the seed yield of soybean at EC varied depending on whether EC was also provided at night, with much greater yield stimulation for ECdn than for ECd in some years.

Additional key words: Glycine max; photosynthetically active radiation; precipitation; rainfall; stem; vapor pressure deficit

Received: November 16, 2004; Accepted: March 24, 2005; Published: September 1, 2005  Show citation

ACS AIP APA ASA Harvard Chicago Chicago Notes IEEE ISO690 MLA NLM Turabian Vancouver
Bunce, J.A. (2005). Seed yield of soybeans with daytime or continuous elevation of carbon dioxide under field conditions. Photosynthetica, 43(3), 435-438. doi: 10.1007/s11099-005-0069-z
Share...
Download citation
  • BibTeX (.bib)
  • Bookends (.ris)
  • EasyBib (.ris)
  • EndNote (.enw)
  • EndNote 8 (.xml)
  • ISI WoS (.isi)
  • Medlars (.medlars)
  • Mendeley (.ris)
  • MODS (.xml)
  • Papers (.ris)
  • RefWorks (.txt)
  • RefManager (.ris)
  • RIS (.ris)
  • MS Word (.xml)
  • Zotero (.ris)
    • Open full article

    References

    1. Ainsworth, E.A., Davey, P.A., Bernacchi, C.J., Dermody, O.C., Heaton, E.A., Moore, D.J., Morgan, P.B., Naidu, S.L., Yoo Ra, H.-S., Zhu, X.-G., Curtis, P.S., Long, S.P.: A meta-analysis of elevated [CO2] effects on soybean (Glycine max) physiology, growth and yield. - Global Change Biol. 8:695-709, 2002. Go to original source...
    2. Bunce, J.A.: The response of soybean seedling growth to carbon dioxide concentration at night in different thermal regimes. - Biotronics 30:15-26, 2001.
    3. Bunce, J.A.: Responses of seedling growth to daytime or continuous elevation of carbon dioxide. - Int. J. Plant Sci. 164: 377-382, 2003. Go to original source...
    4. Caemmerer, S. von, Ghannoum, O., Conroy, J.P., Clark, H., Newton, P.C.D.: Photosynthetic responses of temperate species to free air CO2 enrichment (FACE) in a grazed New Zealand pasture. - Aust. J. Plant Physiol. 28:439-450, 2001. Go to original source...
    5. Heagle, A.S., Booker, F.L., Miller, J.E., Pursley, W.A., Stefanski, L.A.: Influence of daily carbon dioxide exposure duration and root environment on soybean response to elevated carbon dioxide. - J. environ. Qual. 28:666-675, 1999. Go to original source...
    6. Leakey, A.D.B., Bernacchi, C.J., Dohleman, F.G., Ort, D.R., Long, S.P.: Will photosynthesis of maize (Zea mays) in the US Corn Belt increase in future [CO2] rich atmospheres? An analysis of diurnal courses of CO2 uptake under free-air concentration enrichment (FACE). - Global Change Biol. 10: 951-962, 2004. Go to original source...
    7. Lee, T.D., Tjoelker, M.G., Ellsworth, D.S., Reich, P.B.: Leaf gas exchange responses of 13 prairie grassland species to elevated CO2 and increased nitrogen supply. - New Phytol. 150: 405-418, 2001. Go to original source...
    8. Luscher, A., Hendrey, G.R., Nosberger, J.: Long-term responsiveness to free air CO2 enrichment of functional types, species and genotypes of plants from fertile permanent grassland. - Oecology 113:37-45, 1998. Go to original source...
    9. Reuveni, J., Gale, J., Zeroni, M.: Differentiating day from night effects of high ambient [CO2] on the gas exchange and growth of Xanthium strumarium L. exposed to salinity stress. - Ann. Bot. 79: 191-196, 1997. Go to original source...
    10. Takeuchi, Y., Kubiske, M.E., Isebrands, J.G., Pregitzer, K.S., Hendrey, G., Karnosky, D.F.: Photosynthesis, light and nitrogen relationships in a young deciduous forest canopy under open-air CO2 enrichment. - Plant Cell Environ. 24:1257-1268, 2001. Go to original source...
    11. Ziska, L.H., Ghannoum, O., Baker, J.T., Conroy, J., Bunce, J.A., Kobayashi, K., Okada, M.: A global perspective of ground level, 'ambient' carbon dioxide for assessing the response of plants to atmospheric CO2. - Global Change Biol. 7:789-796, 2001. Go to original source...

    Return to the content