Nutritional diagnosis and yield of sugarcane varieties in Urtisols/ Diagnose nutricional de variedades de cana-de-acucar em argissolos

Leaf diagnosis is one of the methods used to evaluate the demand of fertilizers in sugarcane, thus contributing for a better fertilizer management. The objective of this study was to evaluate the nutritional status of sugarcane varieties through the leaf analysis and mensuration of macro and micronutrients. The following sugarcane varieties were studied: RB92579, RB867515, SP81-3250, VAT90-212, VAT90-61, SP83-2847, RB863129, RB931011, RB931566 and RB855113, on two types of Urtisols: Dystrocohesive Yellow Argisol (PAdx1) and Dystrocohesive Abruptic Yellow Argisol (PAdx2) at Cansancao de Sinimbu Plant, Alagoas, Brazil. The experimental design was a randomized block design, arranged in a 2 x 10 factorial, consisting of ten varieties and four repetitions for each soil, where the following nutrients were evaluated: N, P, K, Ca, Mg, S, Zn, Fe, Mn, Cu and B. The PAdx2 was the soil that provided the highest amount of nutrients for plants (N, P, K, Ca, Mg, S, Zn, Fe, Mn, Cu and B). The SP8132-50 variety showed the best performance regarding the concentration of nutrient in leaf (K, S, Fe, Mn and Cu), followed by RB931011, VAT90-61 and RB867515.