Effects of nitrogen addition on Eucalyptus globulus growth and carbon sequestration potential under various CO2 climatic conditions

Abstract

ABSTRACTThe catastrophic and enormous increase in atmospheric greenhouse gas levels leads to global climate change, and an immediate need to investigate the effects of increased CO2 levels on natural vegetation is complex. The goal of this study was to see how nitrogen addition affected Eucalyptus globulus Labill. species development in both ambient (408 ppm) and different elevated (450 ppm, 500 ppm, 550 ppm, and 600 ppm) carbon dioxide environments with OSC S-1000 L plant growth chamber. In this investigation, nitrogen was added in the form of potassium nitrate in various amounts (0, 25, 50, 100, and 200 mg/kg of soil). The plant’s growth responses (leaf length, leaf width, and shoot length) were investigated. To calculate the carbon content, a multiple regression equation was employed to fit the model. The maximum carbon content value 52.37 ± 0.03% was recorded at 200 mg/kg nitrogen addition level for an elevated CO2 condition of 600 ppm. The results of this study conclude that the nitrogen addition had a positive impact on the plant growth and carbon sequestration potential of Eucalyptus globulus under ambient as well as elevated CO2 conditions.

Keywords

• Agroforestry
• climate change
• plant growth
• model fit equation
• carbon content