Eficiência da adubação foliar suplementar de nitrogênio na cultura da cana-de-açúcar

Abstract

Sugarcane is considered nationally and internationally as one of the most important energy crops for the biofuels sector. The economic yield of the crop is given by sugar and ethanol production. The cane plant has shown low response to nitrogen fertilization and the possible explanations for this are not sufficiently clarified. The objective of this work was to evaluate the effect of adding nitrogen (N) doses applied to the planting furrows and in the leaf in the culture of cane plant. The experiment was carried out at Denusa under field conditions in a C production environment. The experimental design was randomized blocks in a 5 x 5 factorial scheme with 4 replications, with 5 doses of N-soil (0, 50, 100, 150 and 200 kg ha-1) using ammonium nitrate and 5 doses as source of N-leaf (0; 1.5; 3, 6 and 9 L ha-1) using the commercial product N32 from Ubyfol. The variables analyzed were: number of stems per meter, average stem diameter, stem height in meters, TCH (Tons of Stems per Hectare), ATR, ° Brix, POL and Fiber. For statistical analysis, analysis of variance and regression was performed. There was no positive effect of the treatments in relation to the growth and development variables of the culture, productivity and technological quality of the raw material.