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vol. 18, nr. 2 (2011)
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Use of porous tubes for measuring water extraction by roots and simultaneous maintaining of soil water potential in growth chamber experiments
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Artur Nosalewicz1, Morio Iijima2, Jerzy Lipiec1, Anna Król1
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1 Institute of Agrophysics PAS, Doświadczalna 4, 20-290 Lublin, Poland |
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2 Crop Science Lab. Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan |
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vol. 18 (2011), nr. 2,
pp. 347-354
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abstract:
The efficiency of a system based on porous tubes in maintaining soil water potential during water extraction by plants in growth chamber experiment was evaluated. The effect of porous tubes area, soil type and density on water flow through porous tubes as induced by various water potentials was evaluated. The rate of change of soil water potential in response to pressure change depends strongly on the area of ceramic tubes per soil volume. If rapid changes or precise control of soil water potential are needed, the area of ceramic tubes per soil volume should be large. Experiments in which porous tubes are used for maintaining water potential should reach a compromise between plant water demands and permissible disturbance caused by the presence of porous tubes in the soil environment.
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keywords:
porous tubes, soil water potential, root water extraction, watering
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original in:
English
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