Impact of Elevated CO₂ on Growth and Yield of Wheat Crop: A Review

In this manuscript, 19 research studies with 79 experiments from 9 countries of the world based on growth, yield and their components of Wheat (Tritium aestivum L.), under various CO₂ levels was analyzed. Only the recently published research studies (excluding models and mathematical tools based research) were considered in the study. Most of the selected experiment confirmed that elevated CO₂ have positive impact on growth, yield and its components. Majority of the observations confirm that the elevated CO₂ improved the growth & development processes as well as the yield & yield attributes of Wheat crop. No doubt elevated CO₂ have positive impact on various growth and yield parameters but when we consider the impact of climate change (elevated temperature, drought, and increasing concentration of anthropogenic gases like SO₂, CO, CH₄ etc.) the response of CO₂ will become negative. Even though elevated levels of CO₂ has potential to compensate the impact of other changes in climate and may create a path in future to meet the demand of burgeoning world population.

Total 19 field studies with 79 experiments from 9 countries of the world based on growth, yield and their components of Wheat (Tritium aestivum L.), under elevated CO₂ levels were used for analysis.

Elevated CO₂ shows positive response on growth and yield of wheat crop.

When other factors like elevated temperature, drought, and other pollutant gases like Ozone or SO₂ combines with elevated CO₂ the response will become lesser or some time negative.