Germinação e influência do sombreamento e substratos na produção de mudas de baru (Dipteryx alata Vogel)

Abstract

Dipteryx alata Vogel is a species found in several regions of the Brazilian Savana. It has several benefits such as the commercialization of almonds, the use of tea, oil, in construction, and the recovery of degraded areas. The aim of this study was to evaluate the influence of dipteryx alata growth under shading and full sun conditions in a nursery. The experimental design used was completely randomized, in a 4 x 2 factorial scheme (4 substrates and 2 environments). The substrates were: Sand (S1); Soil (S2); Sand + Manure 3:1 v/v (3) and Soil + Manure 3:1 v/v (S4). The characteristics evaluated in the work were: number of leaves (NF); collar diameter (DC); shoot length (CPA); longest root length (CR), shoot dry matter (MSA), root dry matter (MSR) and Dickson quality index (IQD). The method, without seed scarification, showed 92% of seed emergence in an average time of 15.5 days. D. alata seedlings were produced in substrates that contained sand; soil or the mixture of sand + manure 3:1 (v/v) or soil + manure 3:1 (v/v). Treatments promoted greater response in full sun, while treatments (S2), (S3), (S4) were not favorable due to waterlogging in 70% shading.