Crescimento inicial de espécies arbóreas nativas em solos de área degradada da caatinga em condições de viveiro.

Abstract

Initial growth of native tree species in soils of a degraded area of the caatinga under nursery conditions. The increasing demand for land use, associated with irrational exploitation of natural resources are the main causes of land degradation. The recuperation using native tree species should be prioritized, since it shortens the process, and they are adapted to the environmental conditions. This study aims to determine the initial growth of five native tree species, jurema preta (Mimosa tenuiflora (Willd.) Poiret), faveleira (Cnidosculus quercifolius) and pereiro (Aspidosperma pyrifolium Mart.) (Pioneers) and aroeira (Myracrodrun urundeuva Allemão) and Tabebuia aurea (golden Tabebuia) (secondaries) in degraded soil area of Caatinga. We developed the study in the greenhouse environment at the Nursery Health Center in the Rural Health and Technology Center at the Federal University of Campina Grande for a period of 180 days. The experimental design was completely randomized with 5x6 factorial treatments (five species and six sampling dates), and three replications. We analyzed the emergency percentage average fall of the cotyledons, height and ratio of root / shoot species. The five species showed germination percentage higher than 90% and a different behavior regarding the average time of fall of cotyledons. The jurema preta grew faster and had the lowest growth was the faveleira. The secondary species (craibeira e aroeira) had a ratio of root / shoot growing, while the pioneers jurema preta and faveleira had higher growth of shoot and root, respectively.