Uso de enraizadores sintéticos e natural para propagação da espécie Baraúna.

Abstract

Schinopsis brasiliensis Engl, popularly known as baraúna, is one of the largest trees in the Caatinga, reaching up to 12 meters in height and diameters between 20 and 60 cm.

Belonging to the Anacardiaceae family, it is called by different names, such as baraúna- do-sertão and uvacho. This species occurs in several Brazilian states, including Piauí,

Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia, Minas Gerais, Goiás, Mato Grosso and Rondônia. Native to Brazil, the baraúna is a characteristic species of the Caatinga and has great economic value for the northeast. In addition to its usefulness as wood, which has led to it being threatened with extinction, the baraúna is very important for the maintenance of local fauna as it provides food and shelter for various animals, also serving as a support for bird nests. The baraúna, therefore, plays a significant ecological and economic role in the region. Asexual propagation through cuttings is a viable option, but presents difficulties such as delays in rooting and the formation of the crown of the new tree. Cuttings often sprout but do not root. This study aims to analyze the performance of synthetic rooting agents, naphthaleneacetic acid and indolebutyric acid, in addition to the natural rooting agent, aloe vera extract, in the propagation of Schinopsis brasiliensis Engl, by cuttings. The experiment was carried out at the Federal University of Campina Grande, at the Education and Health Center in Cuité, Paraíba, from October 2023 to February 2024. 20 cm cuttings were used, the base of which was immersed for 1 minute in hydroalcoholic solutions of different concentrations of the mentioned acids, while the cuttings treated with aloe vera extract remained 24 hours with the base in contact with the extract. The variables analyzed were root emission, stem diameter, number of shoots and number of leaves. It was concluded that synthetic rooters did not influence the root formation of Schinopsis brasiliensis Engl, presenting satisfactory results only for the survival of the cuttings.