Legume Research - An International Journal

Web of Science
  • Year: 2017
  • Volume: 40
  • Issue: 3

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

  • Author:
  • Sumit Kumar Dey1,, B Chakrabarti1, R Prasanna2, SD Singh1, TJ Purakayastha3, A Datta4, H Pathak1
  • Total Page Count: 9
  • Page Number: 497 to 505

1Centre for Environment Science and Climate Resilient Agriculture, Indian Agricultural Research Institute, New Delhi 110 012, India

Centre for Environment Science and Climate Resilient Agriculture, ICAR-Indian Agricultural Research Institute, New Delhi-110 012, India

2Division of Microbiology, Indian Agricultural Research Institute, New Delhi 110 012, India

3Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi 110 012, India

4Division of Agricultural Statistics, Indian Agricultural Statistics Research Institute, New Delhi 110 012, India

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 of year 2014 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.

Keywords

Cyanobacteria, Elevated CO2 Mungbean, Phosphorus, Yield