Leaf concentration of macronutrients in oil palm plants fertilized with phosphorus, potassium and magnesium in the Eastern Amazon

The concentrations of nutrients in the leaves allow a better understanding nutritional status oil palm plants, making it tool for diagnosing origins problems and assisting fertilizer recommendations. In this sense, objective current research was to evaluate leaf N, P, K, Ca, Mg S under fertilization with phosphate, potassium magnesium edaphoclimatic conditions Eastern Amazon. experiment conducted at AGROPALMA® Company municipality Tailândia, state Pará, Brazil. experimental design used randomized blocks factorial scheme 4 x 2 3 2, four levels phosphorus, two sources phosphorus (natural phosphate triple superphosphate), three magnesium. Phosphorus increased Ca Mg, providing higher when superphosphate applied. However, adult plants (12 years old), there different on K between aphid. Potassium only respectively. Fertilization promotes adequate e grown