Impacts of elevated ozone and CO2 on growth and yield of double zero mustard (Brassica juncea)

Abstract

An experiment was conducted during 2020–21 and 2021–22 under FACE (Free air concentration enrichment) by growing PDZM 31 (Pusa Double Zero Mustard 31) genotype under different treatments (elevated ozone, carbon dioxide, their interaction, and ambient). The aim of the study was to assess the impact of elevated ozone and carbon dioxide interaction on the growth and yield of Indian mustard [Brassica juncea (L.) Czern.]. Growth characteristics (Crop growth rate, Absolute growth rate, Specific leaf area, Specific leaf weight, Dry weight of Biomass, Plant height, and no. of leaves) and yield attributes were negatively impacted under elevated ozone during different growth stages of Indian mustard followed by an increased growth under elevated CO2. In seed yield under interaction treatment, the elevated CO2 ameliorates the negative effects of elevated ozone by about 3.85% and 4.27% in both years.

Keywords

• Dry weight biomass, Elevated ozone, Elevated carbon dioxide, Growth rate, Yield