Legume Research

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Research Article

Legume Research, volume 40 issue 3 (june 2017) : 497-505

Productivity of mungbean (Vigna radiata) with elevated carbon dioxide at various phosphorus levels and cyanobacteria inoculation

Sumit Kumar Dey*, B. Chakrabarti, R. Prasanna, S.D. Singh, T.J. Purakayastha, A. Datta, H. Pathak
1<p>Centre for Environment Science and Climate Resilient Agriculture,&nbsp;Indian Agricultural Research Institute, New Delhi-110 012, India.</p>
Cite article:- Dey* Kumar Sumit, Chakrabarti B., Prasanna R., Singh S.D., Purakayastha T.J., Datta A., Pathak H. (2016). Productivity of mungbean (Vigna radiata) with elevated carbon dioxideat various phosphorus levels and cyanobacteria inoculation . Legume Research. 40(3): 497-505. doi: 10.18805/lr.v0iOF.3765.

ABSTRACT

Increase in the concentration of atmospheric carbon dioxide (CO2) has significant impact on crop growth and productivity. A study was undertaken during the kharif season to study the impacts of elevated CO2 and cyanobacterial inoculation on growth and yield of mungbean crop under different doses of P using Free Air Carbon dioxide Enrichment (FACE) facility. The crop was grown under two CO2 levels i.e., ambient (400 µmol mol-1) and elevated (550 ± 20 µmol mol-1), with five levels of P (0, 8, 12, 16 and 20 mg P kg-1 soil) and 2 levels of calothrix sp. (with and without cyanobacteria) inoculation. Elevated CO2 level increased seed yield by 35.0% and biomass yield by 31.3%. Leaf area, photosynthesis rate and leaf chlorophyll content significantly increased at high CO2 level. Yield attributes such as number of pods plant-1, number of seeds pod-1 and test weight also increased at high CO2 level. Application of P and cyanobacterial inoculation further increased growth and yield of the crop. The study showed that application of P as well as cyanobacteria could help in improving productivity of legumes under elevated CO2 condition. 

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