EARLY DEVELOPMENT OF CASTOR BEANS GROWN UNDER SALINITY CONDITIONS (VARIETIES BRS ENERGIA, MPA 34 AND MPB 01)

Authors

  • Rafael Antônio Presotto Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
  • Guilherme Zolli Alves Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
  • Elisamara Caldeira do Nascimento Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
  • Glaucio da Cruz Genuncio Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
  • Everaldo Zonta Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ

DOI:

https://doi.org/10.1590/1983-21252016v29n404rc

Keywords:

Ricinus communis. Sodium sensitivity. Osmotic adjustment.

Abstract

Studies have shown that some plant species exhibit satisfactory production levels when grown under high salinity levels, whereas others exhibit decreased production due to sodium sensitivity even at low sodium concentrations. The castor bean is moderately sensitive to salinity. The aim of the present study was to evaluate the early growth of three castor bean varieties (BRS Energia, MPA 34 and MPB 01) grown in nutrient solution with increasing sodium concentrations (control, 25, 50, 75 and 100 mmol L-1). A completely randomized split-plot experimental design was used, with a 5x3 factorial scheme and three replicates per treatment. Salinity resulted in decreased dry weight of all castor bean varieties grown for 31 days under hydroponic conditions. The dry weight accumulation was less affected at the root than at the shoot level. Nevertheless, the shoot dry weight decreased with the increasing salinity. MPA 34 exhibited higher early growth than the remaining tested varieties. Salinity affected the early development of the tested castor bean varieties, and this effect was more pronounced at the shoot than at the root. Variety MPA 34 is promising for cultivation under moderate salinity levels.

Author Biographies

  • Rafael Antônio Presotto, Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
    Eng. Agrônomo, Mestre em Agronomia. Departamento de Solos, Instituto de Agronomia.
  • Guilherme Zolli Alves, Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
    Engenheiro Agrônomo Departamento de Solos, Instituto de Agronomia.
  • Elisamara Caldeira do Nascimento, Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
    Engenheiro Agrônomo Mestre em Fitotecnia Departamento de Solos, Instituto de Agronomia.
  • Glaucio da Cruz Genuncio, Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
    Engenheiro Agrônomo Dr. em Agronomia Departamento de Solos, Instituto de Agronomia.
  • Everaldo Zonta, Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ
    Engenheiro Agrônomo Dr. em Agronomia Professor de Fertilidade do Solo, do departamento de Solos, Instituto de Agronomia.

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Published

13-09-2016

Issue

Section

Agronomy