Cultivation of colored cotton irrigated with saline water under potassium and nitrate/ammonium fertilization

Geovani Soares de Lima; Luan Dantas de Oliveira; Hans Raj Gheyi; Lauriane Almeida dos Anjos Soares; Claudivan Feitosa de Lacerda; JoÃ£o Batista dos Santos; BenÃ­cio Medeiros de AraÃºjo

doi:10.5897/AJAR2015.10540

African Journal of
Agricultural Research

Abbreviation: Afr. J. Agric. Res.
Language: English
ISSN: 1991-637X
DOI: 10.5897/AJAR
Start Year: 2006
Published Articles: 6860

Full Length Research Paper

Cultivation of colored cotton irrigated with saline water under potassium and nitrate/ammonium fertilization

Geovani Soares de Lima

Geovani Soares de Lima
Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, ParaÃba, Brazil.
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Luan Dantas de Oliveira

Luan Dantas de Oliveira
Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, ParaÃba, Brazil.
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Hans Raj Gheyi

Hans Raj Gheyi
Nucleus for Soil and Water Engineering, Federal University of RecÃ´ncavo of Bahia, Cruz das Almas, CEP 44.380-000, Bahia, Brazil.
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Lauriane Almeida dos Anjos Soares

Lauriane Almeida dos Anjos Soares
Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, ParaÃba, Brazil.
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Claudivan Feitosa de Lacerda

Claudivan Feitosa de Lacerda
Department of Agricultural Engineering, Federal University of CearÃ¡, Fortaleza, CEP 60.450-760, CearÃ¡, Brazil.
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JoÃ£o Batista dos Santos

JoÃ£o Batista dos Santos
Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, ParaÃba, Brazil.
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BenÃcio Medeiros de AraÃºjo

BenÃcio Medeiros de AraÃºjo
Academic Unit of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, CEP 58.109-970, ParaÃba, Brazil.
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Article Number - 08AEB0D56667
Vol.11(1), pp. 32-39 , January 2016
https://doi.org/10.5897/AJAR2015.10540

Received: 18 October 2015
Accepted: 12 November 2015
Published: 07 January 2016

Abstract

This study aimed to evaluate growth and production components of the colored cotton cultivar ‘BRS Topázio’ irrigated with saline water as a function of dose of potassium and proportions of nitrate and ammonium. The study was conducted in drainage lysimeters under greenhouse conditions, in a eutrophic Gray Argisol of sandy clay loam texture, in the municipality of Campina Grande, Brazil, from November 2014 to March 2015. A randomized block design was used to test five doses of potassium-DK (50, 75, 100, 125 and 150% of the recommendation for pot experiments) and five proportions of nitrate and ammonium-PNA (100/0, 75/25, 50/50, 25/75 and 0/100 mg of N kg^-1of soil). The K dose referring to 100% corresponded to 150 mg of K₂O kg^-1of soil. N supply in NO₃^-/NH₄⁺ proportion of 25/75, promoted increase in growth variables (plant height, stem diameter and leaf area) and mass of cotton bolls. The K dose of 145.5 mg of K₂O kg^-1of soil promoted the formation of higher number of bolls plant^-1. The application of K in the doses of 112.5 and 187.5 mg of K₂O combined with 25/75 and 0/100 mg of NO₃^-/NH₄⁺ promoted increment in cottonseed mass and the dose of 187.5 mg of K₂O associated with 25/75 mg of NO₃^-/NH₄⁺increased the number of days for flower bud opening.