ChileanJAR

The present study was conducted at the Neopolis Platou Fruticulture Project, located near the banks of San Francisco River, Sergipe State, Brazil, and had the objective to evaluate the effect of different doses of N and K, applied during one year through fertigation, on the leaf macro and micronutrients of the coconut (Cocos nucifera L.). The experimental design was a completely randomized block design with four replicates of ten combinations of N (urea) and K (KCl), treatments defined by the Plan Puebla III Matrix Model. Each treatment was repeated four times. The experimental plots were six coconut plants. The concentration of macro and micronutrients in the leaf, before and after the fertigation period were determined. With the exception of N, Na and Cl, the concentrations of macro and micronutrients were not influenced by the NK treatments. The concentrations of N, P, Ca and Mg in the leaf decreased and the Cu and Cl increased after a year of fertigation.