Controle químico de plantas daninhas em povoamentos de restauração florestal

Flávio Augusto Monteiro dos Santos; Paulo Sérgio dos Santos Leles; João Elves da Silva Santana; Daniel Ferreira do Nascimento; Aroldo Ferreira Lopes Machado

doi:10.4336/2018.pfb.38e201701524

Chemical weed control in forest restoration stands

Authors

Flávio Augusto Monteiro dos Santos Federal Rural University of Rio de Janeiro https://orcid.org/0000-0001-8757-5082
Paulo Sérgio dos Santos Leles Federal Rural University of Rio de Janeiro https://orcid.org/0000-0002-8393-6095
João Elves da Silva Santana Federal Rural University of Rio de Janeiro http://orcid.org/0000-0003-1363-0370
Daniel Ferreira do Nascimento PCH Santa Rosa II https://orcid.org/0000-0002-6122-2091
Aroldo Ferreira Lopes Machado Federal Rural University of Rio de Janeiro https://orcid.org/0000-0001-6506-9728

DOI:

https://doi.org/10.4336/2018.pfb.38e201701524

Keywords:

Glyphosate, Native species, Forest conservation

Abstract

This paper aimed to assess the herbicide glyphosate effectiveness in areas dominated by signal grass in forest restoration stands compared to mechanical control. The chemical control consisted in hoeing 1.2 m row, before planting, and when brachiaria achieved medium height of 30 cm applied glyphosate herbicide inter-row in 1,44 kg ha-1. Mechanical control consisted in hoeing 1.2 m row in planting lines and inter-row mowing. Ten different tree species were planted in a 3.2 x 1.7 m spacing. Survival and height growth were evaluated at 6, 12, 18 and 30 months after planting and the collar diameter at 30 months. Implementation and maintenance costs for each treatment were also evaluated at 30 months after planting. Survival rate had little influence from control method. Treatment with glyphosate resulted under all evaluations in superior height growth to all evaluated tree species. The mowing maintenance cost approximately three times the chemical method.

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Published

2018-12-29

Issue

Vol. 38 (2018)

Section

Articles

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