Growth, Yield and Quality of Maize under Ozone and Carbon Dioxide Interaction in North West India

Maize is an important C4 crop and how it will respond to elevated atmospheric carbon dioxide ozone levels not well documented. To understand the growth nutritional quality of maize be affected under (CO2) tropospheric (O3) interaction, a field experiment was conducted free air O3 CO2 enrichment rings (FAOCE) growing HQPM-1 PMH-1 cultivars at New Delhi, India. Each cultivar exposed ambient (559 ppm) alone along with (71.8 ppb) throughout period. Elevated (EC) significantly increased leaf area index (10.8–22.5%), chlorophyll (11.2–17.3%) photosynthetic rate (12.1–16.5%) in two over ambient. exposure 27 ppm hr (AOT4O) (EO) treatment led significant decline yield (p < 0.01) by 9.2% 9.8% PMH-1. Under increase grain higher (25.4%) as compared (9.04%). The protein content EO (8.1–12.5%) decreased EC (13.4–13.6%) due dilution effect. Lysine, phosphorus potassium both CO2. Carbohydrate amylose concentrations grains (9.9–15.5%) (10.8–16.7%) EO, however, no change yield, protein, amylase, carbohydrate, lysine, observed interaction ECO After years study we could conclude that able offset negative effect (71 on 11.2% 18.8% without affecting cultivars.