Effects of phosphorus on content of macronutrients of rangpur lime growing in pots

Abstract

The objective of this study was to evaluate the effects of phosphorus on content of macronutients of Rangpur lime (Citrus limonia Osbeck) growing in pots until transplanting time. The experiment was conducted in a greenhouse at the Escola Superior de Agricultura de Lavras, MG, Brazil. Seventeen treatments were used with six replications. The treatments were four phosphorus sources: ordinary superphosphate (OS), concentrated superphosphate (CS), phosphoric acid (PA), and a rock phosphate (RP). Each one used 0.08, 0.16, 0.32 and 1.28 mg/ml P₂O₅ of soil. Macronutrients content (N, P, K, Ca, Mg and S) was determined on a dry matter basis, six months after sowing. Among the four levels, the level of 1.28 mg P₂O₅ /ml of soil decreased the content of N and increased the contents of P, Ca, Mg and S.