The surface lime application in rubber tree (Hevea brasiliensis) during the productive phase can improve the fertility of the soil and the dry rubber yield. The objective of this work was to evaluate the effect of soil surface lime application on the dry rubber yield. The experiment was installed in mature rubber tree (15 years), in a Typic Kandiuldult with saturation for bases (V) of 39%. The treatments were constituted by doses of calcined liming: zero, half of the recommended dose, a time the recommended dose and two times the recommended dose, corresponding to 0, 0.21, 0.42 and 0.84 t ha-1, respectively. The doses were calculated considering the base saturation for the culture (V = 50%) in São Paulo State. Lime application neutralized the soil acidity and increased the base saturation until the layer of 0.20 m and increased dry rubber yield. The maximum yield was associated with base saturation of 57% and with foliar Ca content of 8 g kg-1.
Hevea brasiliensis; liming; soil pH; nutrition; dry rubber
