African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6863

Full Length Research Paper

The sowing density on oat productivity indicators

Marcos Vinicios Romitti
  • Marcos Vinicios Romitti
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Eldair Fabricio Dornelles*
  • Eldair Fabricio Dornelles*
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Jose Antonio Gonzalez da Silva
  • Jose Antonio Gonzalez da Silva
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Zip Code: 98700-000 Ijuí, RS, Brazil.
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Anderson Marolli
  • Anderson Marolli
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Rubia Diana Mantai
  • Rubia Diana Mantai
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Osmar Bruneslau Scremin
  • Osmar Bruneslau Scremin
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Emilio Ghisleni Arenhardt
  • Emilio Ghisleni Arenhardt
  • Department of Crop Plants, Federal University of Rio Grande do Sul, Avenue Bento Gonçalves 7712, Zip code: 91540-000, Porto Alegre, RS, Brazil.
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Ana Paula Brezolin
  • Ana Paula Brezolin
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Douglas Cezar Reginatto
  • Douglas Cezar Reginatto
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Ari Higino Scremin
  • Ari Higino Scremin
  • Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul, Street Lulu Ingelfritz 480, Zip code: 98700-000, Ijuí, RS, Brazil.
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Andressa Raquel Cyzeski de Lima
  • Andressa Raquel Cyzeski de Lima
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Zip Code: 98700-000 Ijuí, RS, Brazil.
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Dionatas Rodrigues da Silva
  • Dionatas Rodrigues da Silva
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Zip Code: 98700-000 Ijuí, RS, Brazil.
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  •  Received: 21 December 2016
  •  Accepted: 16 February 2017
  •  Published: 16 March 2017

Abstract

The sowing density adjustment in oat can maximize the productivity expression. The aim of this study is to define the behavior of productivity expression of biomass, grains, straw and harvest index through increasing sowing density in the main biotype cultivated in Southern Brazil. It proposes the possibility of indicating higher sowing density to the productivity maximization of biomass and grains. With the density adjusted to the grain productivity to simulate the reflexes on the biological and straw productivity and harvest index compared to recommended density, considering high and reduced tillering cultivars in different succession systems. The study was carried out in 2013, 2014 and  2015 in randomized block design with four replications in a 4 × 2 factorial scheme, for sowing density (100, 200, 300, 600 and 900 m-2) and oat cultivars (Brisasul and URS Taura), respectively, in the corn/oat and soybean/oat succession system. With the increase in sowing density, the biological and straw productivity evidence a linear behavior and the grain productivity and harvest index of quadratic behavior, regardless of the cultivar, agricultural year and succession system. It is possible to indicate a higher sowing density to the biomass and grain productivity maximization with sowing density close to 500 seeds m-2 in the main succession systems. In high and reduced tillering cultivars, the adjusted density compared to the recommended increased the biological and straw productivity, regardless of agricultural year and succession systems.

Key words: Avena sativa, succession system, weather condition, regression.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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