Concentrate superphosphate for citrus rootstocks in different soil types

Abstract

Concentrate superphosphate was applied to five different types of soils, in which tour types of citrus rootstocks were planted. The experiment design used was subsubplots in randomised blocks with three replications. The 'Rangpur' lime presented the highest growth followed by 'Caipira' orange, Poncirus trifoliataand 'Cleopatra' mandarin. Regarding the type of soil, the best responses to the concentrate superphosphate were obtained in decreasing order, from Dark-Red Latosol, purple Latosol, Red-Yellow Latosol, Reddish Brown Laterite soil and Red-Yellow Podzolic. The rootstock presented better growth when 3,5kg of concentrate superphosphate was applied/m³ of the substrate.