African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

The management of sowing density on yield and lodging in the main oat biotype grown in Brazil

Marcos Vinicios Romitti
  • Marcos Vinicios Romitti
  • Department of Physical and Engineering Sciences, Regional University of the Northwest of Rio Grande do Sul, 480 Lulu Ingelfritz Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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José Antonio Gonzalez da Silva
  • José Antonio Gonzalez da Silva
  • Department of Agrarian Studies, Regional University of the Northwest of Rio Grande do Sul, 3000 Comércio Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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Anderson Marolli
  • Anderson Marolli
  • Department of Physical and Engineering Sciences, Regional University of the Northwest of Rio Grande do Sul, 480 Lulu Ingelfritz Street, 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, 7712 Bento Gonçalves Avenue, Zip code: 91540-000, Porto Alegre, RS, Brazil.
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Ângela Teresinha Woschinski de Mamann
  • Ângela Teresinha Woschinski de Mamann
  • Department of Physical and Engineering Sciences, Regional University of the Northwest of Rio Grande do Sul, 480 Lulu Ingelfritz Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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Osmar Bruneslau Scremin
  • Osmar Bruneslau Scremin
  • Department of Physical and Engineering Sciences, Regional University of the Northwest of Rio Grande do Sul, 480 Lulu Ingelfritz Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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Osório Antonio Lucchese
  • Osório Antonio Lucchese
  • Department of Agrarian Studies, Regional University of the Northwest of Rio Grande do Sul, 3000 Comércio Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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Cleusa Adriane Menegassi Bianchi Krüger
  • Cleusa Adriane Menegassi Bianchi Krüger
  • Department of Agrarian Studies, Regional University of the Northwest of Rio Grande do Sul, 3000 Comércio Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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Lorenzo Ghisleni Arenhardt
  • Lorenzo Ghisleni Arenhardt
  • Department of Agrarian Studies, Regional University of the Northwest of Rio Grande do Sul, 3000 Comércio Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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Luis Michel Bandeira
  • Luis Michel Bandeira
  • Department of Agrarian Studies, Regional University of the Northwest of Rio Grande do Sul, 3000 Comércio Street, Zip code: 98700-000, Ijuí, RS, Brazil.
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  •  Received: 15 February 2016
  •  Accepted: 19 April 2016
  •  Published: 26 May 2016

Abstract

The sowing density management in the main oat biotype cultivated in Brazil can bring yield gains with reduced lodging. The aim of this study was to sow the density adjustment of early cycle oat cultivars and reduced stature to increase biomass and grain yield with reduced lodging, considering high and low N-residual release succession systems in different years. The study was carried out in 2011, 2012 and 2013 in randomized blocks experimental design with four replications in factorial scheme 4 × 2, for sowing density (100, 300, 600 and 900 seeds m-2) and oat cultivars (Brisasul and URS Taura) in the corn/oat and soybean/oat succession systems. In each succession system two experiments were conducted, one to quantify the biomass production rate, and the other, aimed at estimating the grain yield and lodging. Regardless of year and cultivar, the main oat biotype grown in Southern Brazil evidences optimal sowing density around 500 seeds m-2 in the biomass and grain expression yield in the corn/oat and soybean/oat succession systems. In the soybean/oat succession system, the use of optimal density can favor the plant lodging, especially in favorable cultivation years. The corn/oat succession system through lower release of N-residual proves to be efficient concerning the grain yield expression and reduced lodging in the use of adjusted density.
 
 
Key words: Avena sativa L., succession systems, climate change, biomass, regression.