Weed interference factors that affect the growth of an atlantic forest tree species

Authors

DOI:

https://doi.org/10.14393/BJ-v35n2a20198-41820

Keywords:

Weeds, Reforestation, Urochloa brizantha, Schinus terebinthifolius

Abstract

The objective of this study was to assess the possible existence of allelopathy and competition for water and nutrients of the grass Urochloa brizantha (Hochst. ex A. Rich.) Stapf cv. Marandu grown together with Schinus terebinthifolius Raddi in a greenhouse. The experimental design was completely randomized in a factorial scheme with 3 factors and the following levels: (1) one individual of the forest species with and without the presence of U. brizantha at a density of 4 individuals per pot; (2) supply of nutrients in limiting or non-limiting dose; and (3) supply of a limiting or non-limiting amount of water. We measured the height and root collar diameter of the tree seedlings, as well as the shoot and root dry weights of both species. There was competition by the grass with the tree species. The coexistence reduced the height by 30.5 cm, the root collar diameter by 1.58 mm and the shoot and root dry weights by 22.7 g and 9.5 g, respectively, of S. terebinthifolius. The greater supply of water in the pots increased the height by 18.9 cm of the S. terebinthifolius seedlings compared to the plants grown with limited water supply. Evidence was also observed of competition for nutrients, principally at the largest nutrient addition level, where the presence of the grass caused an additional decrease in the root collar diameter and shoot dry weight of the tree species, while the shoot and root dry weights of the grass increased. The results did not allow evaluating the existence of allelopathy of U. brizantha on S. terebinthifolius.

terebinthifolius .

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Author Biographies

Thainá Alves dos Santos, Universidade Federal Rural do Rio de Janeiro

Mestrado pela Pós-Graduação de Ciências Ambientais e Florestais (PPGCAF) do Instituto de Florestas. Universidade Federal Rural do Rio de Janeiro.

Alexander Silva de Resende, Embrapa Agrobiologia

Pesquisador Embrapa Agrobiologia. Laboratório de Leguminosas Florestais.

Felipe Ferreira da Silva, Universidade Federal do Rio de Janeiro

Doutorando pelo Programa de Pós-Graduação em Ciências Ambientais e de Conservação da Universidade Federal do Rio de Janeiro. Núcleo em Ecologia e Desenvolvimento Ambiental de Macaé.

 

Aroldo Ferreira Lopes Machado, Universidade Federal Rural do Rio de Janeiro

Professor UFRRJ. Instituto de Agronomia. Departamento de Fitotecnia.

Guilherme Montandon Chaer, Embrapa Agrobiologia

Pesquisador Embrapa Agrobiologia. Laboratório de Leguminosas Florestais.

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Published

2019-04-12

How to Cite

SANTOS, T.A. dos, RESENDE, A.S. de, SILVA, F.F. da, MACHADO, A.F.L. and CHAER, G.M., 2019. Weed interference factors that affect the growth of an atlantic forest tree species. Bioscience Journal [online], vol. 35, no. 2, pp. 485–494. [Accessed27 May 2022]. DOI 10.14393/BJ-v35n2a20198-41820. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/41820.

Issue

Section

Agricultural Sciences