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Growth and yield responses of castor bean (Ricinus communis L.) at two enhanced CO2 levels

Author

Listed:
  • M. Vanaja

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • M. Jyothi

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • P. Ratnakumar

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • P. Vagheera

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • P. Raghuram Reddy

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • N. Jyothi Lakshmi

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • S.K. Yadav

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • M. Maheshwari

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

  • B. Venkateswarlu

    (Central Research Institute for Dryland Agriculture, Santhoshnagar, India)

Abstract

Growth and yield responses of castor bean (Ricinus communis L.) to two elevated CO2 levels (550 and 700 ppm) were evaluated up to the maturity of first order spikes in open top chambers (OTCs). The growth characteristics - root and shoot lengths, root volume, root:shoot ratios, leaf area, dry weights of different plant parts, leaf area duration and crop growth rate increased with 550 and 700 ppm of CO2 levels compared with ambient control. The spike length, pod and seed yield of first order spikes increased under enhanced CO2 levels over ambient control. Elevated CO2 levels significantly increased the total biomass and yield of castor bean, however enhanced CO2 levels per se did not changed the content and quality of the castor oil. A positive response of castor bean to increased CO2 concentrations is a good indication for its future existence in potentially changed climatic conditions.

Suggested Citation

  • M. Vanaja & M. Jyothi & P. Ratnakumar & P. Vagheera & P. Raghuram Reddy & N. Jyothi Lakshmi & S.K. Yadav & M. Maheshwari & B. Venkateswarlu, 2008. "Growth and yield responses of castor bean (Ricinus communis L.) at two enhanced CO2 levels," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 54(1), pages 38-46.
    • Handle: RePEc:caa:jnlpse:v:54:y:2008:i:1:id:386-pse
    DOI: 10.17221/386-PSE
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    References listed on IDEAS

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    1. M. Vanaja & P. Vagheera & P. Ratnakumar & N. Jyothi Lakshmi & P. Raghuram Reddy & S.K. Yadav & M. Maheswari & B. Venkateswarlu, 2006. "Evaluation of certain rainfed food and oil seed crops for their response to elevated CO2 at vegetative stage," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 52(4), pages 164-170.
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    Cited by:

    1. M. Vanaja & S.K. Yadav & G. Archana & N. Jyothi Lakshmi & P.R. Ram Reddy & P. Vagheera & S.K. Abdul Razak & M. Maheswari & B. Venkateswarlu, 2011. "Response of C4 (maize) and C3 (sunflower) crop plants to drought stress and enhanced carbon dioxide concentration," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(5), pages 207-215.

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