Macronutrient contents in rose crops under salinity levels and nitrogen:potassium ratios

Authors

  • Everaldo Moreira da Silva Universidade Federal do Piauí-Campus Professora Cinobelina Elvas
  • Carlos José Gonçalves Souza Lima Universidade Federal do Piauí,
  • Jarbas Honorio de Miranda Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz,
  • Aureliano Albuquerque Ribeiro Universidade Federal do Piauí-Campus Professora Cinobelina Elvas
  • Sérgio Nascimento Duarte Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz.

DOI:

https://doi.org/10.14295/cs.v8i2.1016

Keywords:

chemical fertilizers, electrical conductivity, Rosa SP

Abstract

Rose crops under fertigation in a protected environment is an alternative for production increase. However, the high dosages of fertilizers can lead to the salinization of soils in this environment. The aim of this study was to evaluate the effect of salinity caused by the excess of fertilizer application through fertigation associated with different nitrogen: potassium (N: K) ratios on macronutrient contents in rose crops. The study was performed in a randomized block design, arranged in a factorial scheme (5 x 3 + 1), with four repetitions, totaling 64 plots. The treatments were formed by combination of five initial levels of electrical conductivity (EC: 1.2; 2.3; 3.3; 4.3 e 5.5 dS m-1), three nitrogen: potassium (N: K) ratios (2:1; 1:2 and 1:3) and a control with N: K ratio (1: 1). Contents of N, K, Ca, Mg and S were evaluated in the stem, leaves and flowers. The levels of N, K, P, Ca and Mg in plant tissues are affected by the treatments at 245 days after transplanting. Leaves presented the highest levels of macronutrients, mainly nitrogen. TDR probe is a satisfactory tool in the management of fertigation.

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Author Biographies

Everaldo Moreira da Silva, Universidade Federal do Piauí-Campus Professora Cinobelina Elvas

Professor da Universidade Federal do Piauí- Campus Professora Elvas (CPCE), Bom Jesus, Piauí

Carlos José Gonçalves Souza Lima, Universidade Federal do Piauí,

Professor da Universidade Federal do Piauí, Centro de Ciências Agrárias (CCA), Teresina, Piauí.

Jarbas Honorio de Miranda, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz,

Professor da Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, São Paulo.

Aureliano Albuquerque Ribeiro, Universidade Federal do Piauí-Campus Professora Cinobelina Elvas

Mestrando em Agronomia:Solos e Nutrição de Plantas pela Universidade Federal do Piauí, Campus Professora Cinobelina Elvas (CPCE), Bom Jesus, Piauí

Sérgio Nascimento Duarte, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz.

Professor da Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, São Paulo.

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Published

2018-02-01

How to Cite

da Silva, E. M., Souza Lima, C. J. G., de Miranda, J. H., Ribeiro, A. A., & Duarte, S. N. (2018). Macronutrient contents in rose crops under salinity levels and nitrogen:potassium ratios. Comunicata Scientiae, 8(2), 326–336. https://doi.org/10.14295/cs.v8i2.1016

Issue

Vol. 8 No. 2 (2017)

Section

Original Article

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