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Evaluation of yield loss in field sorghum from a C3 and C4 weed with increasing CO2

Abstract

Dwarf sorghum (C4) was grown at ambient and at projected levels of atmospheric carbon dioxide (250 mol mol−1 above ambient) with and without the presence of a C3 weed (velvetleaf) and a C4 weed (redroot pigweed), to quantify the potential effect of rising atmospheric carbon dioxide concentration [CO2] on weed–crop interactions and potential crop loss. In a weed-free environment, increased [CO2] resulted in a significant increase in leaf weight and leaf area of sorghum but no significant effect on seed yield or total aboveground biomass relative to the ambient CO2 condition. At ambient [CO2] the presence of velvetleaf had no significant effect on either sorghum seed yield or total aboveground biomass; however, at elevated [CO2], yield and biomass losses were significant. The additional loss in sorghum yield and biomass was associated with a significant (threefold) increase in velvetleaf biomass in response to increasing [CO2]. Redroot pigweed at ambient [CO2] resulted in significant losses in total aboveground biomass of sorghum but not in seed yield. However, as [CO2] increased, significant losses in both sorghum seed yield and total biomass were observed for sorghum–redroot pigweed competition. Increased [CO2] was not associated with a significant increase in redroot pigweed biomass (P = 0.17). These results indicate potentially greater yield loss in a widely grown C4 crop from weedy competition as atmospheric [CO2] increases.

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Corresponding author
Corresponding author. Alternate Crop and Systems Laboratory, Bldg 001, Baltimore Avenue, Beltsville, MD 20705; lziska@asrr.arsusda.gov
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A. M. Alberto , L. H. Ziska , C. R. Cervancia , and P. A. Manalo 1996. The influence of increasing carbon dioxide and temperature on competitive interactions between a C3 crop, rice (Oryza sativa) and a C4 weed (Echinochloa glabrescens). Austr. J. Plant Physiol 23:795802.

J. A. Bunce and L. H. Ziska 2000. Crop ecosystem responses to climatic change: crop/weed interactions. Pages 333352 in K. R. Reddy and H. F. Hodges eds. Climate Change and Global Crop Productivity. New York: CABI.

D. R. Carter and K. M. Peterson 1983. Effects of a CO2 enriched atmosphere on the growth and competitive interaction of a C3 and C4 grass. Oecology 58:188193.

R. H. Ellis , P. Q. Craufurd , R. J. Summerfield , and E. H. Roberts 1995. Linear relations between carbon dioxide concentration and rate of development towards flowering in sorghum, cowpea and soybean. Ann. Bot 75:194198.

J. Marc and R. M. Gifford 1984. Floral initiation in wheat, sunflower, and sorghum under carbon dioxide enrichment. Can. J Bot 62:914.

M. J. Ottman , B. A. Kimball , P. J. Pinter , G. W. Wall , R. L. Vanderlip , S. W. Leavitt , R. L. LaMorte , A. D. Matthias , and T. J. Brooks 2001. Elevated CO2 increases sorghum biomass under drought conditions. New Phytol 150:261273.

L. H. Ziska 2000. The impact of elevated CO2 on yield loss from a C3 and C4 weed in field-grown soybean. Glob. Change Biol 6:899905.

L. H. Ziska 2001. Changes in competitive ability between a C4 crop and a C3 weed with elevated carbon dioxide. Weed Sci 49:622627.

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Weed Science
  • ISSN: 0043-1745
  • EISSN: 1550-2759
  • URL: /core/journals/weed-science
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