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Impact of ozone on grain sorghum yield

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Abstract

Grain sorghum (Sorghum vulgare Pers.) is an important animal feed crop, and it is sometimes planted as a substitute for field corn. Although sorghum is grown in areas of the central and southern U.S. where potentially damaging concentrations of O3 exist, no data are available regarding the sensitivity of grain sorghum to O3. Plants of grain sorghum (DeKalb A28+ ) were field-grown in open-top chambers and exposed to O3(7-hr day−1 seasonal mean concentrations of 0.016, 0.040, 0.059, 0.078, 0.102, and 0.129 ppm) for 85 days to determine the impact of O3 on grain yield. A randomized complete block design incorporated three replicates of all treatments. Foliar injury was noted at the two highest 03 treatments. Analysis of variance of the data indicated highly significant O3 effects on overall grain yield. There was a general decrease in yield as O3 increased, and the overall grain yield reductions were caused primarily by reductions in individual seed weight. Quadratic, Weibull, and plateau-linear models all adequately described the response of grain sorghum to O3. Yields were not markedly affected at O3 concentrations below the 0.10 ppm treatment, and the predicted yield loss of 15% at a seasonal 7-hr mean O3 concentration of 0.13 ppm indicates that grain sorghum exhibits considerable tolerance to O3.

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Authors and Affiliations

  1. Environmental Effects Research Program, Environmental Research Division, Argonne National Laboratory, 60439, Argonne, IL, U.S.A.

    L. W. Kress & J. E. Miller

Authors
  1. L. W. Kress
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  2. J. E. Miller
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Although the research described in this article has been funded (wholly or in part) by the United States Environmental Protection Agency through contract number AD-89-F2544 to Argonne National Laboratory, it has not been subjected to the Agency's peer and policy review and therefore does not necessarily reflect the views of the Agency and no official endorsement should be inferred.

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Kress, L.W., Miller, J.E. Impact of ozone on grain sorghum yield. Water Air Soil Pollut 25, 377–390 (1985). https://doi.org/10.1007/BF00283790

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  • DOI: https://doi.org/10.1007/BF00283790

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