Doses and methods of simple superphosphate application on the micronutrient content in rangpour lime nursery

Abstract

This study was carried out to evaluate the effects of superphosphate doses and application methods on rootstock Rangpour lime micronutrient levels until graft stage. The study was carried out at the Fruit Science sector of Escola Superior de Agricultura in Lavras, MG, Brazil, from August/90 to June/91. The experimental design used was in randomized blocks in factorial scheme 4 X 8, with two replications and 24 plants per plot. The combination of four doses (0,66, 1,33, 5,33 and 10,66 g P₂O₅/plant) with eight allocation methods (in furrow; mixed in furrow; on surface of planting line; on total area of surface plots; 20% in furrow and 80% on total area of surface plots; 20% mixed in furrow and 80% on total area of surface plots; 20% on planting line and 80% on total area of surface plots; and in four replications on plots' surface) gave 32 treatments. The doses and allocation methods didn't affect the micronutrients levels of Rangpour lime. Superphosphate doses bigger than the superior standarts doses didn't affect Rangpour lime.