The mechanized harvesting is best performed in shallow furrows. The straw promotes greater retention of water, reduces evaporation from the surface, but affects the budding. The polymers modify the physiology providing water and nutrients. The objective of this study was to understand the relationship of form of planting, straw and polymers with bioenergy (of the stalk, straw and system), productivity (stalks, straw and biomass), fiber and total recoverable sugar (TRS). The sugarcane ratoon has been used in plots (2 x 4), that is, two depths and four doses of the polymer. The plots were subdivided into treatments with four doses of dry matter and three repetitions. The use of dose of 5 t ha-1 as top dressing was detrimental to the productivity of sugarcane, biomass and bioenergy. The form of planting and the use of polymer did not affect the studied variables. There is a linear relationship between productivity and bioenergy stalk, straw and bioenergy productivity of trash. The bioenergy system has a linear relationship with biomass, fiber and TRS. The bioenergy is divided into 82.6% in stalk and 17.4% in straw.
Saccharum; bionergy; calorific power
