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

Soil moisture and water use efficiency in cotton plants grown in different spacings in the Brazilian Cerrado Region

Tonny José Araújo da Silva
  • Tonny José Araújo da Silva
  • Department of Agricultural Engineering, Federal University of Mato Grosso, Rondonópolis-MT, Brazil.
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Thiago Franco Duarte
  • Thiago Franco Duarte
  • Department of Agricultural Engineering, Federal University of Mato Grosso, Rondonópolis-MT, Brazil.
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Jackelinne Valéria Rodrigues Sousa
  • Jackelinne Valéria Rodrigues Sousa
  • Department of Agricultural Engineering, Federal University of Mato Grosso, Rondonópolis-MT, Brazil.
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Edna Maria Bonfim-Silva
  • Edna Maria Bonfim-Silva
  • Department of Agricultural Engineering, Federal University of Mato Grosso, Rondonópolis-MT, Brazil.
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Adriano Bicioni Pacheco
  • Adriano Bicioni Pacheco
  • Department of Agricultural Engineering, Federal University of Mato Grosso, Rondonópolis-MT, Brazil.
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Helon Hébano Freitas de Sousa
  • Helon Hébano Freitas de Sousa
  • Department of Agricultural Engineering, Federal University of Mato Grosso, Rondonópolis-MT, Brazil.
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  •  Received: 18 January 2015
  •  Accepted: 10 February 2016
  •  Published: 25 February 2016

Abstract

The aim of this study was to assess soil moisture and water use efficiency in cotton plants (Gossypium hirsutum L.) grown in different row spacing in the Cerrado, Brazil. The crop was irrigated by drip irrigation, and the amount of supplied water was equal to 90% of crop evapotranspiration (ETc). Spacing of 0.4, 0.7 and 1.0 m between rows were assessed. Soil moisture was assessed up to 1.0 m deep, and water use efficiency for seed cotton and shoot dry matter yield was assessed based on the total water supplied to the crop (rain + irrigation). Soil moisture variations were minimal from 0.6 m deep, regardless of the spacing used. From this same depth, the soil cultivated under the denser system (0.4 m) was drier than the other spacing. In traditional planting (1.0 m), the cotton plant has lower water use efficiency for both seed and shoot dry matter yield. Water use efficiency is optimized in 0.6 m spacing, although the nitrogen dose applied should be observed.

Key words: Gossypium hirsutum L., drip irrigation (SDI), moisture profile.