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An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)

Nitrogen plays a key role in crop yields. Hence, farmers may apply excessive N fertilizers to crop fields, inducing environmental pollution. Crop N monitoring methods have been developed to improve N fertilizer management, most of them based on leaf or canopy optical-property measurements. However,...

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Autores principales: Muñoz-Huerta, Rafael F., de J. Ortiz-Melendez, Antonio, Guevara-Gonzalez, Ramon G., Torres-Pacheco, Irineo, Herrera-Ruiz, Gilberto, Contreras-Medina, Luis M., Prado-Olivarez, Juan, Ocampo-Velazquez, Rosalia V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4168502/
https://www.ncbi.nlm.nih.gov/pubmed/25057134
http://dx.doi.org/10.3390/s140711492
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author Muñoz-Huerta, Rafael F.
de J. Ortiz-Melendez, Antonio
Guevara-Gonzalez, Ramon G.
Torres-Pacheco, Irineo
Herrera-Ruiz, Gilberto
Contreras-Medina, Luis M.
Prado-Olivarez, Juan
Ocampo-Velazquez, Rosalia V.
author_facet Muñoz-Huerta, Rafael F.
de J. Ortiz-Melendez, Antonio
Guevara-Gonzalez, Ramon G.
Torres-Pacheco, Irineo
Herrera-Ruiz, Gilberto
Contreras-Medina, Luis M.
Prado-Olivarez, Juan
Ocampo-Velazquez, Rosalia V.
author_sort Muñoz-Huerta, Rafael F.
collection PubMed
description Nitrogen plays a key role in crop yields. Hence, farmers may apply excessive N fertilizers to crop fields, inducing environmental pollution. Crop N monitoring methods have been developed to improve N fertilizer management, most of them based on leaf or canopy optical-property measurements. However, sensitivity to environmental interference remains an important drawback. Electrical impedance has been applied to determine the physiological and nutritional status of plant tissue, but no studies related to plant-N contents are reported. The objective of this article is to analyze how the electrical impedance response of plants is affected by their N status. Four sets of lettuce (Lactuca sativa L.) with a different N-source concentrations per set were used. Total nitrogen and electrical impedance spectra (in a 1 to 100 kHz frequency range) were measured five times per set, three times every other day. Minimum phase angles of impedance spectra were detected and analyzed, together with the frequency value in which they occurred, and their magnitude at that frequency. High and positive correlation was observed between plant N content and frequency values at minimum phase angle with no significant variations detected between days of measurement. These results suggest that electrical impedance can be sensitive to plant N status.
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spelling pubmed-41685022014-09-19 An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa) Muñoz-Huerta, Rafael F. de J. Ortiz-Melendez, Antonio Guevara-Gonzalez, Ramon G. Torres-Pacheco, Irineo Herrera-Ruiz, Gilberto Contreras-Medina, Luis M. Prado-Olivarez, Juan Ocampo-Velazquez, Rosalia V. Sensors (Basel) Article Nitrogen plays a key role in crop yields. Hence, farmers may apply excessive N fertilizers to crop fields, inducing environmental pollution. Crop N monitoring methods have been developed to improve N fertilizer management, most of them based on leaf or canopy optical-property measurements. However, sensitivity to environmental interference remains an important drawback. Electrical impedance has been applied to determine the physiological and nutritional status of plant tissue, but no studies related to plant-N contents are reported. The objective of this article is to analyze how the electrical impedance response of plants is affected by their N status. Four sets of lettuce (Lactuca sativa L.) with a different N-source concentrations per set were used. Total nitrogen and electrical impedance spectra (in a 1 to 100 kHz frequency range) were measured five times per set, three times every other day. Minimum phase angles of impedance spectra were detected and analyzed, together with the frequency value in which they occurred, and their magnitude at that frequency. High and positive correlation was observed between plant N content and frequency values at minimum phase angle with no significant variations detected between days of measurement. These results suggest that electrical impedance can be sensitive to plant N status. MDPI 2014-06-27 /pmc/articles/PMC4168502/ /pubmed/25057134 http://dx.doi.org/10.3390/s140711492 Text en © 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Muñoz-Huerta, Rafael F.
de J. Ortiz-Melendez, Antonio
Guevara-Gonzalez, Ramon G.
Torres-Pacheco, Irineo
Herrera-Ruiz, Gilberto
Contreras-Medina, Luis M.
Prado-Olivarez, Juan
Ocampo-Velazquez, Rosalia V.
An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)
title An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)
title_full An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)
title_fullStr An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)
title_full_unstemmed An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)
title_short An Analysis of Electrical Impedance Measurements Applied for Plant N Status Estimation in Lettuce (Lactuca sativa)
title_sort analysis of electrical impedance measurements applied for plant n status estimation in lettuce (lactuca sativa)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4168502/
https://www.ncbi.nlm.nih.gov/pubmed/25057134
http://dx.doi.org/10.3390/s140711492
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