POTASSIUM FERTILIZATION AND SOIL MANAGEMENT SYSTEMS FOR COTTON CROPS

Authors

  • Vitor Marques Vidal Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
  • Frederico Antonio Loureiro Soares Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
  • Marconi Batista Teixeira Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
  • Antonio Evami Cavalcante Sousa Department of Hydraulics and Irrigation, Instituto Federal Goiano, Ceres, GO
  • Fernando Nobre Cunha Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO

DOI:

https://doi.org/10.1590/1983-21252017v30n304rc

Keywords:

Gossypium hirsutum L. KCl. No-till. Conventional tillage. Boll production.

Abstract

Cotton has great socio-economic importance due to its use in textile industry, edible oil and biodiesel production and animal feed. Thus, the objective of this work was to identify the best potassium rate and soil management for cotton crops and select among cultivars, the one that better develops in the climatic conditions of the Cerrado biome in the State of Goiás, Brazil. Thus, the effect of five potassium rates (100, 150, 200, 250 and 300 kg ha-1 of K2O) and two soil management systems (no-till and conventional tillage) on the growth, development and reproduction of four cotton cultivars (BRS-371, BRS-372, BRS-286 and BRS-201) was evaluated. The data on cotton growth and development were subjected to analysis of variance; the data on potassium rates were subjected to regression analysis; and the data on cultivars and soil management to mean test. The correlation between the vegetative and reproductive variables was also assessed. The conventional tillage system provides the best results for the herbaceous cotton, regardless of the others factors evaluated. The cultivar BRS-286 has the best results in the conditions evaluated. The cultivar BRS-371 under no-till system present the highest number of fruiting branches at a potassium rate of 105.5% and highest number of floral buds at a potassium rate of 96.16%. The specific leaf area was positively correlated with the number of bolls per plant at 120 days after emergence of the herbaceous cotton.

Author Biographies

  • Vitor Marques Vidal, Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
    Departamento de Irrigação e Hidráulica; Engenheiro Agrícola; Mestre em Ciências Agrárias – Agronomia - Área de Concentração Tecnologias sustentáveis em sistemas de produção e uso do solo e água
  • Frederico Antonio Loureiro Soares, Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
    Departamento de Irrigação e Hidráulica; Ciências Agrárias
  • Marconi Batista Teixeira, Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
    Departamento de Irrigação e Hidráulica; Ciências Agrárias
  • Antonio Evami Cavalcante Sousa, Department of Hydraulics and Irrigation, Instituto Federal Goiano, Ceres, GO
    Departamento de Irrigação e Hidráulica; Ciências Agrárias
  • Fernando Nobre Cunha, Department of Hydraulics and Irrigation, Instituto Federal Goiano, Rio Verde, GO
    Departamento de Irrigação e Hidráulica; Ciências Agrárias

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Published

21-03-2017

Issue

Section

Agronomy