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| Author(s): | Hansen, G. K. |
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| Author Affiliation: | Hydrotechnical Laboratory, The Royal Veterinary and Agricultural University, Copenhagen, Denmark |
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| Title: | Resistance to water flow in soil and plants, plant water status, stomatal resistance and transpiration of Italian ryegrass, as influenced by transpiration demand and soil water depletion |
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| Source: | Acta Agriculturae Scandinavica. Vol. 24, No. 2, 1974, p. 83-92. |
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| # of Pages: | 10 |
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| Keywords: | TIC Keywords: Lolium multiflorum; Soil moisture; Transpiration; Soil water content
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| Geographic Terms: | Denmark |
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| Abstract/Contents: | In experiments using Italian ryegrass, soil resistance (Rs) to water flow determined from soil physical measurements showed no agreement with soil + plant resistance (Rs + Rp) determined by the difference in water potential between soil and leaves and transpiration rate. Correction for Rs for a soil-root interface resistance dependent on soil water content did not result in agreement with Rs + Rp. It was concluded that Rs was not limiting within the range of 0.1-15 bar soil water potential with 18 cm of roots/cm3. Rp was shown to decrease with increasing water flow rate. No unique relationship between Rp and leaf water potential was found. Stomatal resistance and transpiration rate decreased rapidly as soil-water potential decreased below -11 bar. |
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| Language: | English |
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| References: | 29 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hansen, G. K. 1974. Resistance to water flow in soil and plants, plant water status, stomatal resistance and transpiration of Italian ryegrass, as influenced by transpiration demand and soil water depletion. Acta Agriculturae Scandinavica. 24(2):p. 83-92. |
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