Balanço energético da produção de sorgo sacarino em cultivo irrigado e sequeiro

Abstract

Aimed to evaluate the productivity and the energy balance of four sorghum genotypes grown in irrigated and rainfed condition. The experiment was conducted in the irrigation and drainage of the Federal University of Grande Dourados (UFGD) area located in the city of Dourados Mato Grosso do Sul. Experimental design was a randomized complete block in a split-plot, with and without irrigation (plots ) with four genotypes - BRS 506, CV 007, CV 147 and EJ 7281 (subplots) and four replications, composing 32 plots. Irrigation resulted in an increase in productivity of the four genotypes, and the best response was observed for the 506 variety BRS Irrigation increased the operating cost of crop production of sweet sorghum, but this does not disqualify the activity, and an increase in productivity of 85.89%, 71.82%, 64.28% and 63.36% for EJ 7281, BRS 506, CV 147 and CV 007 genotypes respectively. The energy balance of the crop of sweet sorghum was lower in the absence of irrigation, equal to 3.07; 2.49; 2.96; 2.28; under irrigation while the value was 3.89; 3.29; 3.44; 3.39 to BRS 506, RC 007, RC 147 and 7281 respectively EJ genotypes.