Response of gerbera inflorescences in function of electrical conductivity and pH solution in substrates

Francielly Torres dos Santos; Luiz Antonio de Mendonça Costa; Mônica Sarolli Silva de Mendonça Costa; Dercio Pereira Ceri

doi:10.15361/1984-5529.2018v46n2p187-193

Authors

Francielly Torres dos Santos Universidade estadual do Oeste do Paraná
Luiz Antonio de Mendonça Costa Universidade Estadual do Oeste do Paraná
Mônica Sarolli Silva de Mendonça Costa Universidade Estadual do Oeste do Paraná.
Dercio Pereira Ceri Universidade Estadual do Oeste do Paraná.

DOI:

https://doi.org/10.15361/1984-5529.2018v46n2p187-193

Abstract

The objective of this work was to evaluate the production of gerbera inflorescences under the influence of pH and the electrical conductivity of the solution of the substrates irrigated with liquid organic fertilizers. The experimental design was of randomized blocks, with four replications and five treatments. Treatments were defined according to fertilization source, which were mineral (NPK) and organic. Organic fertilization was obtained by diluting four organic compounds from agroindustry residue (reproductive poultry bedding, hatchery waste, flotation sludge, sausage skins, coal from boilers, truck wash residue solid fraction and sugar cane bagasse) in composting process in water. After compounds obtainment, water dilution was performed, adjusting nutritive solution electrical conductivity values. Substrate solution electrical conductivity (EC) and pH determination was held at 1, 14, 28, 42, and 56 days after acclimatization in a 1:5 dilution (m/v). Potted gerberas inflorescences were evaluated at 56 days after acclimatization. Number of inflorescences (NI), inflorescence dry matter (IDM), stem height (SH), head diameter (HD), and stem diameter (SD) were determined. The electrical conductivity of the solution of the substrate in the mineral fertilizer is above indicated for gerbera culture, reflecting the lower inflorescence stem height. The pH values obtained from the solution of the substrates are within the range for the development of potted gerberas.

Author Biographies

Francielly Torres dos Santos, Universidade estadual do Oeste do Paraná

Tecnologa em Gestão ambiental. Doutora em engenharia agrícola - Recursos Hídricos e saneamento ambiental. Universidade Estadual do Oeste do Paraná.

Luiz Antonio de Mendonça Costa, Universidade Estadual do Oeste do Paraná

Engenheiro Agronomico pela Universidade Federal de Mato Grosso. Doutor em Agronomia pela Universidade Estadual Paulista Júlio de Mesquita Filho e Pós-doutorado pelo Instituto Superior de Agronomia Lisboa-Portugal.

Mônica Sarolli Silva de Mendonça Costa, Universidade Estadual do Oeste do Paraná.

Engenheira Agrícola pela Universidade estadual do Oeste do Paraná. Doutora em Agronomia pela Universidade Estadual Paulista Júlio de Mesquita Filho e Pós-doutorado pelo Instituto Superior de Agronomia Lisboa-Portugal.