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Science 22 April 1983:
Vol. 220. no. 4595, pp. 428 - 429
DOI: 10.1126/science.220.4595.428
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Articles

Response of Agronomic and Forest Species to Elevated Atmospheric Carbon Dioxide

HUGO H. ROGERS 1, JUDITH F. THOMAS 2, and GAIL E. BINGHAM 3

1 Agricultural Research Service, U.S. Department of Agriculture, and Department of Botany, North Carolina State University, Raleigh 27650
2 Phytotron, Department of Botany, North Carolina State University
3 Biomedical and Environmental Research Division, Lawrence Livermore National Laboratory, Livermore, California 94550

The effects of atmospheric carbon dioxide on corn, soybeans, loblolly pine, and sweetgum were studied in the field during a growing season. The plants were exposed to a range of concentrations of carbon dioxide day and night in open-topped, flow-through chambers. At a mean daytime carbon dioxide concentration of 910 parts per million, increases in total biomass ranged from 157 to 186 percent of the control values. Seed yield and wood volume increased and there were changes in plant anatomy and form. Net photosynthesis increased with increasing carbon dioxide concentration in soybeans and sweetgum, but was unaffected in corn. Water use efficiency also increased in corn, soybeans, and sweetgum.

Submitted on November 8, 1982
Revised on January 11, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Science. ISSN 0036-8075 (print), 1095-9203 (online)