African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6200

Full Length Research Paper

Aries Guineagrass (Megathyrsus maximus Jacq cv. Aries) pasture establishment without chemical control in an environmentally protected area

Carlos H. G. Coimbra
  • Carlos H. G. Coimbra
  • Unidade de Ensino Superior Vale do Iguaçú, Rua Padre Saporiti, 717 - Nossa Senhora do Rocio, 84600-904, União da Vitória, Paraná, Brazil.
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Sebastião B. C. Lustosa
  • Sebastião B. C. Lustosa
  • Universidade Estadual do Centro-Oeste, Guarapuava Universidade Estadual do Centro-Oeste, Rua Simeão Camargo Varela de Sá, n. 03, Bairro Cascavel CEP 85040-080, Guarapuava, Paraná, Brazil.
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Leonardo Deiss
  • Leonardo Deiss
  • School of Environment and Natural Resources, The Ohio State University, 414 Kottman Hall 2021 Coffey Road, Columbus, Ohio 43210, USA.
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Anibal de Moraes
  • Anibal de Moraes
  • Programa de Pós-Graduação em Agronomia, Universidade Federal do Paraná, Rua dos Funcionários, n. 1540 – Juvevê, Curitiba, Paraná, Brazil.
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Edilson B. de Oliveira
  • Edilson B. de Oliveira
  • Empresa Brasileira de Pesquisa Agropecuária, Estrada da Ribeira, Km 111 - Parque Monte Castelo, 83411-000, Colombo, Paraná, Brazil.
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Alda L. G. Monteiro
  • Alda L. G. Monteiro
  • Programa de Pós-Graduação em Agronomia, Universidade Federal do Paraná, Rua dos Funcionários, n. 1540 – Juvevê, Curitiba, Paraná, Brazil.
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  •  Received: 11 December 2018
  •  Accepted: 04 March 2019
  •  Published: 21 March 2019

Abstract

This study aimed to evaluate the Aries Guineagrass (Megathyrsus maximus sin. Panicum maximum Jacq. cv. Aries) and the weed community dynamics under different soil tillage and sowing methods in Southern Brazil, to create alternatives for sustainable farming in areas where weed chemical control is restricted. The experiment was carried out in split-plot design with randomized blocks and four replications; the main plots were three tillage methods: I) conventional, II) reduced tillage with moldboard plow, and III) reduced tillage with harrow plow; and the split-plots included two sowing methods: in line, (a) with seeds placed into the drill and (b) with seeds deposited on the soil surface. Aries Guineagrass and weeds were analyzed for phytosociological parameters during the pasture establishment. Lower weed densities and relative frequencies were found where the Aries Guineagrass was established under reduced tillage with moldboard plow and seeding on the soil surface. The Guineagrass establishment was effective as verified by the high plant survival rates (>75%) in the summer following the one that the pasture was sown. The results showed that, adequate soil tillage and sowing methods can further promote Aries Guineagrass development in areas where chemical control with herbicides is not allowed.

Key words: Perennial pastures, phytosociology, tillage, weeds.