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

Soybean agronomic performance in narrow and wide row spacing associated with NPK fertilizer under no-tillage

Cedrick Brito Chaim Jardim Rosa
  • Cedrick Brito Chaim Jardim Rosa
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Marlene Estevao Marchetti
  • Marlene Estevao Marchetti
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Ademar Pereira Serra*
  • Ademar Pereira Serra*
  • Brazilian Agricultural Research Corporation (EMBRAPA), City of Campo Grande, State of Mato Grosso do Sul, Brazil.
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Luiz Carlos Ferreira de Souza
  • Luiz Carlos Ferreira de Souza
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Simone Candido Ensinas
  • Simone Candido Ensinas
  • Department of Agronomy, Universidade Estadual de Mato Grosso do Sul, City of Cassilândia, State of Mato Grosso do Sul, Brazil.
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Eulene Francisco da Silva
  • Eulene Francisco da Silva
  • Faculdade de Ciências Agrárias/Universidade Federal Rural do Semi-Árido (UFERSA), City of Mossoró, State of Rio Grande do Norte, Brazil.
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Elaine Reis Pinheiro Lourente
  • Elaine Reis Pinheiro Lourente
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Elisangela Dupas
  • Elisangela Dupas
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Eloise Mello Viana de Moraes
  • Eloise Mello Viana de Moraes
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Flavia Araujo Mattos
  • Flavia Araujo Mattos
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Matheus Andrade Martinez
  • Matheus Andrade Martinez
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Vanessa do Amaral Conrad
  • Vanessa do Amaral Conrad
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Tarik Cazeiro El Kadri
  • Tarik Cazeiro El Kadri
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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Maílson Vieira Jesus
  • Maílson Vieira Jesus
  • Universidade Federal da Grande Dourados (UFGD), Post-Graduation Program in Agronomy, City of Dourados, State of Mato Grosso do Sul, Brazil.
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  •  Received: 03 July 2016
  •  Accepted: 26 July 2016
  •  Published: 11 August 2016

Abstract

The purpose of this research was to evaluate soybean agronomic traits performance under row spacing associated with NPK fertilizer. The experimental design was set up in a randomized complete block and the treatments were arranged with factorial concept, consisting of four NPK (02-20-18%) fertilizer rates (0; 200; 400 and 600 kg ha-1) and five row spacing (0.35; 0.45; 0.50; 0.60 and 0.70 m), with three replications. The measurements were performed in two consecutive cropping seasons. The following variables were determined: time of canopy closure; plant height; the height of the first pod insertion; number of pods per plant; number of branches per plant; number of grains per pod; 1000-grain weight; and grain yield. The narrow row spacing (below than 0.40 m) may be a profitable alternative to reduce intraspecific plant competition resulting in improvement of soybean agronomic performance, resulting faster canopy closure and relative equidistance among soybean plants. Narrow rows promoted increase in soybean grain yield. The row spacing of 0.35 m associated with 600 kg ha-1 of NPK fertilizer was the profitable combination to achieve the highest soybean grain yield. The wide row spacing demand more fertilizer to remain the same performance than in 0.35 m spacing row.

Key words: Glycine max L., soil fertility, cropping season, soil science.

Abbreviation

NTS, No-tillage system; FS, final stand; TCC, time for canopy closure; PH, plant height; HFPI, height of the first pod insertion; NBP, number of branches per plant; NFPP, number of failed pods per plant; NGPl, number of grains per plant; GY, grain yield; 1000GW, 1000-grain weight.