ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME

A system to measure the transpiration of herbaceous plants in real time was designed and evaluated. The proposed system includes a sap flow sensor, an electronic interface card and a computational C++ code. The system uses a transducer based on thermocouples and an interface designed to process the...

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Autores principales:	Reyes,José F, Esquivel,Wilson D, Franco,Américo O
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2010
Materias:	Sap flow plant transpiration flow transducer thermocouples
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292010000300002
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spelling	oai:scielo:S0718-342920100003000022011-03-23ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIMEReyes,José FEsquivel,Wilson DFranco,Américo O Sap flow plant transpiration flow transducer thermocouples A system to measure the transpiration of herbaceous plants in real time was designed and evaluated. The proposed system includes a sap flow sensor, an electronic interface card and a computational C++ code. The system uses a transducer based on thermocouples and an interface designed to process the data from the transducer through the parallel port of a personal computer (PC). In order to evaluate the performance of the system, eleven weeks old maize plants (Zea mays L.), growing in a greenhouse were used. The PC based system was calibrated with respect to data from the data logger and evaluated by comparison with results obtained by differential plant weighting. Error of the system to estimate sap was lower than 8%, which is similar to the accuracy of the data logger methods. The evaluated methodology offers a real time possibility to determine water losses due to transpiration and it can be implemented mainly for crops growing in greenhouses to optimize productivity and minimize plant diseases. The PC based method is an option to design a commercial irrigation control system at a relatively low overall cost, since a conventional computer and cheap electronic devices are utilized.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.28 n.3 20102010-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292010000300002en10.4067/S0718-34292010000300002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Sap flow plant transpiration flow transducer thermocouples
spellingShingle	Sap flow plant transpiration flow transducer thermocouples Reyes,José F Esquivel,Wilson D Franco,Américo O ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME
description	A system to measure the transpiration of herbaceous plants in real time was designed and evaluated. The proposed system includes a sap flow sensor, an electronic interface card and a computational C++ code. The system uses a transducer based on thermocouples and an interface designed to process the data from the transducer through the parallel port of a personal computer (PC). In order to evaluate the performance of the system, eleven weeks old maize plants (Zea mays L.), growing in a greenhouse were used. The PC based system was calibrated with respect to data from the data logger and evaluated by comparison with results obtained by differential plant weighting. Error of the system to estimate sap was lower than 8%, which is similar to the accuracy of the data logger methods. The evaluated methodology offers a real time possibility to determine water losses due to transpiration and it can be implemented mainly for crops growing in greenhouses to optimize productivity and minimize plant diseases. The PC based method is an option to design a commercial irrigation control system at a relatively low overall cost, since a conventional computer and cheap electronic devices are utilized.
author	Reyes,José F Esquivel,Wilson D Franco,Américo O
author_facet	Reyes,José F Esquivel,Wilson D Franco,Américo O
author_sort	Reyes,José F
title	ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME
title_short	ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME
title_full	ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME
title_fullStr	ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME
title_full_unstemmed	ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME
title_sort	assessment of a pc based system to measure sap flow in herbaceous plants in real time
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292010000300002
work_keys_str_mv	AT reyesjosef assessmentofapcbasedsystemtomeasuresapflowinherbaceousplantsinrealtime AT esquivelwilsond assessmentofapcbasedsystemtomeasuresapflowinherbaceousplantsinrealtime AT francoamericoo assessmentofapcbasedsystemtomeasuresapflowinherbaceousplantsinrealtime
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ASSESSMENT OF A PC BASED SYSTEM TO MEASURE SAP FLOW IN HERBACEOUS PLANTS IN REAL TIME

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