Efeito da adubação na rosa-do-deserto, Adenium obesum (forssk.) (apocynaceae) pós poda apical

Abstract

The present study aimed to evaluate the effect of different types of fertilization on the development of desert rose, Adenium obesum (Forssk.) (Apocynaceae), after apical pruning. This plant, appreciated for its ornamental value and adaptation to arid climates, has unique characteristics, such as the caudex, a structure that allows the storage of water and nutrients. Apical pruning is a technique commonly used to stimulate branching and, consequently, the aesthetic value of the plant. In this experiment, five treatments with different fertilizations were applied: commercial substrate without fertilization (control), chemical fertilizers Osmocote Plus, Forth Cote and Forth Desert Rose, and the organic fertilizer TaeGold Mix. The impact of fertilizations was evaluated based on variables such as stem and caudex diameter, number of shoots and leaves, in addition to a cost-benefit analysis to guide producers on best practices to maximize the ornamental value and sustainability of the crop. The results indicated that fertilization is crucial for the growth and aesthetics of Adenium obesum. Forth Desert Rose, with a balanced phosphorus formulation, proved to be advantageous in stimulating sprouting, being a cost-effective option. The treatment with Osmocote Plus was the most effective in increasing the number of leaves and sprouts, characteristics valued by the ornamental market. The organic fertilizer TaeGold Mix, in turn, was especially efficient in increasing the diameter of the caudex, giving greater robustness to the plant, an important aspect for consumers seeking ecologically sustainable alternatives.