RECUPERAÇÃO DE ÁREAS DEGRADADAS: SUBSTRATO PARA PRODUÇÃO DE MUDAS E TÉCNICAS DE REVEGETAÇÃO DE BASE DE POÇO EM ECOSSISTEMA DE RESTINGA

• Autor(a) principal: Barros, Bianca de
• Data de Publicação: 2021
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/14762
• topic: Agronomia; Espécies nativas; manejo do solo; áreas impactadas; subject.br-rjbn

Degraded area recovery programs have become essential to minimize the environmental impacts caused by the exploitation of natural resources. In this sense, it is necessary that new techniques are promoted to create opportunities for the production of quality seedlings and also to enable the establishment of native species, in the field, in these disturbed areas. Two experiments were carried out. In the first, the objective was to evaluate the initial development and quality of cedar (Cedrela odorata L.) seedlings on different substrates, differentiated by the proportion of materials used in their composition: soil, commercial substrate, cattle manure and sand, with addition of slow-release fertilizer, aiming to use them in the revegetation of degraded areas. The experimental design used was randomized blocks with nine treatments and four replications. The results indicated that the substrate T0, with 100% soil, is not suitable for the production of seedlings of this species, therefore, the substrate T5 (60% soil + 20% cattle manure + 20% commercial substrate + fertilizer) is the most suitable , as it presented higher means in all studied variables. In the second experiment, the objective was to evaluate the growth of two native species, guava (Psidium cattleyanum) and ingazinho (Inga laurina), in a restinga area, in a deactivated oil exploration well base, in the north of the state of Espírito Santo . The experimental design was randomized blocks - DBC, in a 2x3 factorial scheme with two substrates (sandy - removing the clayey base, and clayey - keeping the clayey base and cultivating on it) and three planting techniques: species native intercropped with bromeliad; native with chemical and organic fertilization in the pit; and native without fertilization and without bromeliad (control), with five repetitions. The two species evaluated showed expressive growth in both types of substrate, being therefore indicated for revegetation in restinga areas. The clayey substrate showed better results of vegetative growth of the species and higher concentrations vi of nutrients Ca, Mg, K, and P. The technique of planting with fertilization was the one that most contributed to plant growth.