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Because of the irrigation potential of subsurface drip, coupled with the need for research on the sugarcane cultivation with this system, there has been growing demand for information on this technique, especially with respect to the soil solution distribution available to plants. Thus, this work aimed to study, in the greenhouse, the soil solution distribution in the irrigated sugarcane with subsurface drip for two flow rates: 1.6 and 3.5 L h-1. For the test there were four PVC containers (500L) for each application rate assessed, filled with sandy soil, and a mesh of 36 TDR probes. The drippers were installed at a depth of 0.30 m. Irrigation management was made from data collected daily through TDR technique, thus maintaining soil moisture in the root system area at field capacity. The sugarcane variety used was RB 845210 and it was fertigated according soil chemical analysis. It was observed that solution distribution in different layers became stable during the applications for each flow, showing that there is a relationship with solution storage within wetted soil volume. It was possible to verify that flow rate did not influence the water and nutrients distribution in the soil profile and also there was no significant statistical difference in productivity, technological quality and root density for two flow rates studied.

SOIL SOLUTION DISTRIBUTION IN SUBSURFACE DRIP IRRIGATION IN SUGARCANE