Impact of Elevated CO2 and Temperature on Greengram (Vigna radiata L.) and Cowpea (Vigna unguiculata L.) under Soil Plant Atmospheric Research (SPAR)

Abstract

The experiment was carried out during 2022 to assess the effect of elevated temperature and elevated CO₂  on growth and yield parameters of Greengram and cowpea under Soil Plant Atmospheric Research (SPAR) at Agro Climate Research Centre, Tamil Nadu Agricultural University, Coimbatore with four treatments viz.,T₁-(aG): Ambient Greengram , T₂ - (eG): +3°C elevated temperature and CO₂ (600 ppm) Greengram, T₃ - (aC): Ambient Cowpea, T₄ - (eC): +3°C elevated temperature and CO₂ 600 ppm in Cowpea which was replicated four times. Results revealed that cowpea recorded maximum plant height, leaf area under elevated temperature cum elevated CO₂ which were significantly higher than other treatments and Greengram CO 8 variety recorded maximum yield attributes under elevated temperature cum elevated CO₂ which were found significantly higher than other treatments. Elevated CO₂ and elevated temperature shown a positive effect on greengram and cowpea plant growth and yield attributes.