This research was accomplished in the Capim Farm of the Distillery Miriri located in the municipality of Capim city in Paraíba state, Brazil, with the objective of identifying the behavior of sugarcane crop, second leaf, for different irrigation water depths and levels of topdressing manuring with a mixture containing N and K2O in 1:0.94 proportion. With this purpose, an experiment was conducted using the variety SP79-1011, in completely randomized blocks in a factorial scheme of 4 x 2 (four irrigation depths and two levels of topdressing manuring), with three replications. The total water applied in the respective treatments was 807, 986, 1164 and 1343 mm and the levels of topdressing manuring were 85 and 305 kg ha-1. The growth, quality and yield parameters of sugarcane were analyzed. The irrigations prevailed in the initial growth phase of the second leaf and at the beginning of maximum development. The manuring dose influenced more the analyzed parameters than the water depth. The water depth influenced significantly, according to a positive linear behavior, the parameters of growth; while the sucrose (POL) of the cane showed a quadratic behavior.
productivity; sugar yield; alcohol yield
