A aviação agrícola na adubação da cana-de-açúcar, aspectos da tecnologia utilizada.

Abstract

Sugar cane is oultivated in a large área extends and expe_ riments actually a continous expansion, tends to be an impor tant market for the Brasilian agricultuval aviation industry.Aga viation was first introduoed in the season 1975/76 in an area of 10.000 ha and the aerial application of fertilizers at São Jo sé Sugar Mill, in Macatuba, State of São Paulo, was considered both agronomioally effiaient and economioally viable. In the sea son 1978/79, only in the region of Lençóis Paulista (State of São Paulo), more than 140.000 ha were fertilized by ais, the to tal aost being approximately 22 millions of cruzeiros (roughly half nrillin dollars). Application to corret Nitrogen were made with urea appli ed from 50 to 70 kilos per hectare. Corrections for Potash have been made with potash chloride at the dosages of 70 to 100 kilos per hectare. For multiple corrections,mixtures are formulated of both fertilizers in accordance with the demands. bue to the difficulties to furnish Phosphorus by ground applications this correction is made by foliar application with the liquid fertili zer formulations 10-08-08 and 12-10-08. Applications timing is guided by the diagnosis made by the Foliar Analysis Laboratory, the diagnosis and recomendations are made by a team of experts. The application of fertilizers both granular and liquids are madeby following basical parameters established for the cheriri cais and for the different dosages. These parameters compose the APPLICATIONS SYSTEMS, developed by AVAL - Aviação Agrícola Lençóis Ltda. Application of solid fertilizers are made accor ding with the Systems AV-S-70 and AV-S-100 and of liquid fertili_ zers according with the System AV-M-50.