Efetividade e custos de diferentes métodos de controle de plantas daninhas visando à restauração florestal

Lucas Rafael de Souza; Alessandra Nascimento Souza; Soraya Alvarenga Botelho; Lucas Amaral de Melo; Aldenir Teixeira da Gama; Rodolfo Soares de Almeida

doi:10.53661/1806-9088202650263937

Authors

Lucas Rafael de Souza Universidade Federal de Lavras, Programa de Pós-Graduação em Engenharia Florestal, Lavras, Minas Gerais, Brasil https://orcid.org/0009-0001-0929-0185
Alessandra Nascimento Souza Universidade Federal de Lavras, Programa de Pós-Graduação em Engenharia Florestal, Lavras, Minas Gerais, Brasil https://orcid.org/0009-0003-7023-6959
Soraya Alvarenga Botelho Universidade Federal de Lavras, Departamento de Ciências Florestais, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0003-4178-465X
Lucas Amaral de Melo Universidade Federal de Lavras, Departamento de Ciências Florestais, Lavras, Minas Gerais, Brasil https://orcid.org/0000-0001-5219-9179
Aldenir Teixeira da Gama Universidade Federal de Minas Gerais, Doutorado em Produção Vegetal, Montes Claros, Minas Gerais, Brasil https://orcid.org/0000-0002-5146-7351
Rodolfo Soares de Almeida Universidade Federal de Viçosa, Departamento de Engenharia Florestal, Viçosa, Minas Gerais, Brasil https://orcid.org/0000-0003-1952-2266

DOI:

https://doi.org/10.53661/1806-9088202650263937

Keywords:

Weed competition, Recovery, Degraded area

Abstract

Weeds in forest restoration projects can pose significant obstacles to the development of native species seedlings due to their high competitive potential, jeopardizing the success of restoration efforts. In this context, the present study aimed to evaluate the effectiveness of different weed control methods in the seedling vicinity as well as the associated costs of maintaining areas undergoing forest restoration. Six control methods were tested: chemical control using glyphosate herbicide, manual weeding, and three physical control methods using mulch, cardboard, and fiber mats, in addition to a no-intervention control treatment. The experiment was conducted in a randomized block design with five blocks, using the native species Peltophorum dubium and Guazuma ulmifolia. The analyzed variables included total height and stem diameter of the seedlings at 11 and 24 months after planting as well as the maintenance costs of the area and the control efficiency of each method. The absence of weed control negatively impacted the development of the tested species, both in terms of height and diameter. All control methods proved effective in managing weeds, with no statistically significant differences between treatments for height and diameter increments at 11 and 24 months after planting. Regarding maintenance costs over 24 months for a one-hectare area, the straw mulch method had the lowest cost at R$ 2,200.00, followed by chemical control (R$ 2,304.75), manual weeding (R$ 4,652.16), treated cardboard (R$ 6,489.80), and fiber bags (R$ 14,434.80).

Keywords: Weed competition; Recovery; Degraded area