Tratamento magnético e eletromagnético da solução nutritiva na produção hidropônica de rúcula

O cultivo hidropônico é relevante na produção de hortaliças devido ao uso eficiente de recursos, controle do desenvolvimento das plantas, elevada produtividade e boa qualidade dos produtos colhidos. Objetivou-se quantificar os efeitos de tratamentos magnético e eletromagnético na solução nutritiva sobre a produção de rúcula hidropônica. Os tratamentos incluíram exposição da solução nutritiva a magnetismo, eletromagnetismo e cultivo convencional (controle), com monitoramento ao longo de quatro períodos (7, 14, 21 e 28 dias após o transplante), e quatro repetições para cada tratamento. Utilizou-se delineamento inteiramente ao acaso, em esquema fatorial. O tratamento magnético proporciona ganhos no desenvolvimento e produtividade e reduz a presença de algas na raiz, bem como aumenta a concentração de magnésio, manganês e ferro no desenvolvimento da cultura de rúcula hidropônica, embora sem implicações diretas no desenvolvimento das plantas.

PALAVRAS-CHAVE:
Eruca sativa ; cultivo hidropônico; nutrição vegetal

Autoria

Hayver Olaya Téllez

Universidade Estadual Paulista “Júlio de Mesquita Filho”, College of Agricultural Sciences, Department of Rural Engineering, Botucatu, SP, Brazil. E-mail: hayver.olaya@unesp.br.Universidade Estadual Paulista “Júlio de Mesquita Filho”BrazilBotucatu, SP, BrazilUniversidade Estadual Paulista “Júlio de Mesquita Filho”, College of Agricultural Sciences, Department of Rural Engineering, Botucatu, SP, Brazil. E-mail: hayver.olaya@unesp.br.

https://orcid.org/0000-0001-7980-9758

Fernando Ferrari Putti

Universidade Estadual Paulista “Júlio de Mesquita Filho”, College of Agricultural Sciences, Department of Biosystem Engineering, Tupã, SP, Brazil. E-mail: fernando.putti@unesp.br.Universidade Estadual Paulista “Júlio de Mesquita Filho”BrazilTupã, SP, BrazilUniversidade Estadual Paulista “Júlio de Mesquita Filho”, College of Agricultural Sciences, Department of Biosystem Engineering, Tupã, SP, Brazil. E-mail: fernando.putti@unesp.br.

https://orcid.org/0000-0002-0555-9271

Roberto Lyra Villas Bôas

Universidade Estadual Paulista “Júlio de Mesquita Filho”, College of Agricultural Sciences, Department of Soils and Environmental Resources, Botucatu, SP, Brazil. E-mail: roberto.lyra@unesp.br.Universidade Estadual Paulista “Júlio de Mesquita Filho”BrazilBotucatu, SP, BrazilUniversidade Estadual Paulista “Júlio de Mesquita Filho”, College of Agricultural Sciences, Department of Soils and Environmental Resources, Botucatu, SP, Brazil. E-mail: roberto.lyra@unesp.br.

https://orcid.org/0000-0001-7516-4147

SCIMAGO INSTITUTIONS RANKINGS

Figuras

Figuras (7)

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Figure 1
Monitoring of the climate conditions (air relative humidity and temperature) within the greenhouse (A) and electric conductivity (EC) in the nutrient solution (B) during the experimental period. unw: untreated water; mw: magnetic water; wtvlf: water treated with very low-frequency electromagnetic resonance fields.

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Figure 2
Responses of biometric parameters in hydroponic arugula plants. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference (ns). UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields.

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Figure 3
Number of leaves and SPAD readings throughout the cultivation cycle of hydroponic arugula. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference. *** Linear regression significant at < 1 º/o. UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields; DAT: days after transplanting.

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Figure 4
Root dry mass and shoot fresh and dry masses throughout the cycle of hydroponic arugula cultivation. UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields; DAT: days after transplanting. *** Linear regression significant at < 1 %.

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Figure 5
Concentrations of macronutrients in arugula crop under hydroponic system. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference (ns). UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields.

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Figure 6
Concentrations of micronutrients in arugula crop under hydroponic system. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference (ns).UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields.

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Figure 7
Presence of algae in roots of arugula bunches. unw: untreated water; mw: magnetic water; wtvlf: water treated with very low-frequency electromagnetic resonance fields.

Figure 1 Monitoring of the climate conditions (air relative humidity and temperature) within the greenhouse (A) and electric conductivity (EC) in the nutrient solution (B) during the experimental period. unw: untreated water; mw: magnetic water; wtvlf: water treated with very low-frequency electromagnetic resonance fields.

Figure 2 Responses of biometric parameters in hydroponic arugula plants. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference (ns). UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields.

Figure 3 Number of leaves and SPAD readings throughout the cultivation cycle of hydroponic arugula. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference. *** Linear regression significant at < 1 º/o. UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields; DAT: days after transplanting.

Figure 4 Root dry mass and shoot fresh and dry masses throughout the cycle of hydroponic arugula cultivation. UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields; DAT: days after transplanting. *** Linear regression significant at < 1 %.

Figure 5 Concentrations of macronutrients in arugula crop under hydroponic system. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference (ns). UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields.

Figure 6 Concentrations of micronutrients in arugula crop under hydroponic system. Distinct uppercase letters indicate statistical differences among the treatments with significance of 5 %, while similar letters indicate lack of statistical difference (ns).UNW: untreated water; MW: magnetic water; WTVLF: water treated with very low-frequency electromagnetic resonance fields.

Figure 7 Presence of algae in roots of arugula bunches. unw: untreated water; mw: magnetic water; wtvlf: water treated with very low-frequency electromagnetic resonance fields.

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Tratamento magnético e eletromagnético da solução nutritiva na produção hidropônica de rúcula

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