Full TGIF Record # 69326
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Web URL(s):https://link.springer.com/article/10.1023/A%3A1004820418099
    Last checked: 09/27/2017
    Access conditions: Item is within a limited-access website
    Notes: Guide page
Publication Type:
i
Refereed
Author(s):Eymar, Enrique; Oki, Lorence R.; Lieth, J. Heinrich
Author Affiliation:Eymar: Departamento de Quimica Agricol, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain; Oki and Lieth: Department of Environmental Horticulture, University of California, Davis, California
Title:Continuous measurements of electical conductivity in growing media using a modified suction probe: Initial calibration and potential usefulness
Section:Regular articles
Other records with the "Regular articles" Section
Source:Plant and Soil. Vol. 230, No. 1, March 2001, p. 67-75.
# of Pages:9
Publishing Information:Dordrecht, Netherlands: Kluwer Academic Publishers
Keywords:TIC Keywords: Electrical conductivity; Growing media; Pots; Pot culture; Water; Salts; Measurement; Greenhouse crops; Nutrient uptake
Abstract/Contents:"A electrical conductivity (EC) cell introduced into a porous ceramic cup was developed to continuously sample the solution and measure EC from different growing media. Application of pressure head creates a continuous recording of solution from the growing media tested, into the ceramic cup, and through the EC cell. Continuous recording of the EC was achieved by connecting the EC meter to a data logger. Using two different pressure heads (-5 and -15 kPa) allowed us to observe differences in the EC of the solution extracted that resulted from different growing retention of each growing media. After a maximum period of 24 h extracting the solution from different growing media, EC values obtained with the probe were compared with those obtained using paste extracts, saturated with either deionized water or nutrient solution. Results show EC values obtained using the probe with a -15 kPa pressure head were closer to values of EC measured in saturated extracts made with nutrient solution. Using a -5 kPa pressure head, EC values with probe were lower than those obtained by extracts done with nutrient solution, but higher than EC values from saturated extracts made with deionized water. Simultaneous measurements of matric tension and EC show the effect of pressure heads applied with the probe on the water content of growing media. This technique is not destructive (the sampling of growing media is not necessary) and its possible to obtain EC measurements of solutions continuously. This method of measuring water and salt content of the root environment has potential applications in the greenhouse produciton of pot plants. Measurements obtained with this method may lead to new information on nutrient uptake by plants and the development of new strategies of managing fertility and irrigation of horticultural crops."
Language:English
References:24
Note:Figures
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Eymar, E., L. R. Oki, and J. H. Lieth. 2001. Continuous measurements of electical conductivity in growing media using a modified suction probe: Initial calibration and potential usefulness. Plant Soil. 230(1):p. 67-75.
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Web URL(s):
https://link.springer.com/article/10.1023/A%3A1004820418099
    Last checked: 09/27/2017
    Access conditions: Item is within a limited-access website
    Notes: Guide page
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MSU catalog number: SB 13 .P55
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