Growth and yield responses of castor bean (Ricinus communis L.) at two enhanced CO2 levels
2008
Vanaja, M.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Jyothi, M.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Ratnakumar, P.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Vagheera, P.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Raghuram Reddy, P.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Jyothi Lakshmi, N.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Yadav, S.K.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Maheshwari, M.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India) | Venkateswarlu, B.,Central Research Inst. for Dryland Agriculture, Santhoshnagar (India)
Growth and yield responses of Ricinus communis 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 both CO2 levels compared with ambient control. The spike length, pod and seed yield of first order spikes also increased. 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.
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