Effects of Elevated Temperature and CO2 on Biomass and Sucrose Accumulation of Selected Sugarcane Genotypes

Global warming cause due by increasing atmospheric CO 2 concentration, and the resulting increase in air temperature is a considerable challenge in crop production. Hence, the objectives of this study were to determine the: (a) responses of biomass and sucrose accumulation of sugarcane to elevated CO 2 (ECO 2 ) and elevated temperature (ET a ), both individually and together, and (b) genotypic variation of these responses. A three-factor factorial experiment considering the combination of CO 2 concentrations and temperatures as the main-plot factor and eight sugarcane varieties as the sub-plot factor arranged in a split-plot design in open-top chambers. Plots in open field conditions were the negative control. The main plot factor had four levels, combinations of ambient/elevated CO 2 concentrations (344-351/777-779 ppm) and ambient/elevated temperatures (34.9-35.6/36.6-38.4