Crescimento inicial Alibertia edulis (Rich) A. Rich. ex DC cultivada com resíduos orgânicos

Abstract

Alibertia edulis (Cerrado quince, Rubiaceae) is commonly used for its medicinal properties, such as glucose-lowering, diuretic, soothing, and antihypertensive activities. However, there are few studies on the agronomic aspects of the species. Therefore, the aim of this study was to evaluate the effect of the use of different organic residues, with and without bokashi, on the initial growth and development of Cerrado quince. The experiments were carried out in pots in a protected environment with 50% shade. The tested treatments used soil in combination with the following organic residues: semidecomposed poultry manure with rice husk base (4.16 g kg-1); semi-decomposed poultry manure with wood shavings base (4.16 g kg-1); Organosuper® (4.16 g kg-1); and castor bean meal (0.83 g kg-1); in addition to a control with only soil. All treatments were assessed with and without the addition of Garden Bokashi®. The experimental arrangement was a 5 × 2 factorial scheme in a randomized block design with four replicates. The experimental unit comprised four pots of substrate (4.2 dm3) with one plant per pot. The greatest plant height (27.33 cm) was observed when the plants were cultivated in soil and poultry manure with rice husk base and Bokashi, at 150 days after transplant. The pigment contents and photochemical efficiency of photosystem II were higher in the leaves of plants cultivated in soil and poultry manure or Organosuper®, both with Bokashi. The highest yields of fresh biomasses from leaves (7.57 g), stem (3.17 g), and roots (6.56 g) were observed in plants cultivated in soil and Organosuper® with Bokashi. The highest values of the dry biomasses from leaves (2.31 and 2.83 g) and roots (1.26 and 1.38 g) were observed in soil and poultry manure with rice husk base and Organosuper®, respectively, both with Bokashi. Thereby, the use of organic residues and Bokashi influenced the initial growth and biomass production of Cerrado quince.