African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Water excess in different phenological stages of canola cultivars

Francilene de Lima Tartaglia
  • Francilene de Lima Tartaglia
  • Rural Science Center, Department of Plant Science, Federal University of Santa Maria, Rio Grande do Sul, Brazil.
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Evandro Zanini Righi
  • Evandro Zanini Righi
  • Rural Science Center, Department of Plant Science, Federal University of Santa Maria, Rio Grande do Sul, Brazil.
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Leidiana Rocha
  • Leidiana Rocha
  • Rural Science Center, Department of Plant Science, Federal University of Santa Maria, Rio Grande do Sul, Brazil.
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Ivan Carlos Maldaner
  • Ivan Carlos Maldaner
  • Federal Institute Farroupilha, Campus São Vicente do Sul, Rio Grande do Sul, Brazil.
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Elizandro Salbego
  • Elizandro Salbego
  • Federal Institute Farroupilha, Campus São Vicente do Sul, Rio Grande do Sul, Brazil.
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Arno Bernardo Heldwein
  • Arno Bernardo Heldwein
  • Rural Science Center, Department of Plant Science, Federal University of Santa Maria, Rio Grande do Sul, Brazil.
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  •  Received: 11 August 2018
  •  Accepted: 05 September 2018
  •  Published: 08 November 2018

Abstract

The objective of this study was to determine the stage of development with greater sensitivity to water excess and the period of time required to compromise the emergence and grain yield components of canola. The experiments were performed in a greenhouse at the Federal University of Santa Maria and at the Farroupilha Federal Institute, Campus of São Vicente do Sul, RS during the 2015 agricultural year. The completely randomized experimental design was utilized to investigate phenological stages and periods of continuous water excess in the soil. Also, factors like percentage of emergence, emergence speed index, grain yield, number of siliques per plant, one hundred grains weight, dry matter of aerial part, silique length, number of grains per silique, and weight of 20 siliques were determined. The stages of rosette leaf formation and beginning of anthesis are the most sensitive to water excess in the soil. Water excess for 24 h is enough to reduce the emergence speed index. However, the percentage of emergence is not compromised by water excess up to 192 continuous hours. 24 h of water excess reduces the number of siliques per plant, dry matter of aerial part and grain yield of canola.

Key words: Brassica napus, grain yield, lowland cultivation, waterlogging.