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An exponential root-water-uptake model
Canadian Journal of Soil Science, 1999Macroscopic root-water-extraction models often do not adequately account for the non-uniform distribution of roots in the soil profile. We developed an exponential root-water-uptake model, which was derived from a measured root density distribution function. The model, incorporated in the Soil-Water-Atmosphere-Plant (SWAP) simulation model, was tested
K. Y. Li, J. B. Boisvert, R. De Jong
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Water Uptake and Flow in Roots
1982The loss of water by evaporation from the leaves of plants (transpiration) is an inevitable accompaniment of the photosynthetic absorption of carbon dioxide from the atmosphere. Water is absorbed from the soil by the roots to make good this transpirational loss.
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A linear root water uptake model
Journal of Hydrology, 1988A model of root water extraction is proposed, in which a linear variation of extraction rate with depth is assumed. Five crops are chosen for simulation studies of the model, and soil moisture depletion under optimal conditions from different layers for each crop is calculated. Similar calculations are also made using the constant extraction rate model.
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Uptake of water from a Kandosol subsoil. II. Control of water uptake by roots
Plant and Soil, 2013To test for the presence of an impediment to water flow at the soil-root interface. Wheat plants were grown in repacked and undisturbed field soil. Their transpiration rate, E, was varied in several steps from low to high and then back to low again, while the hydrostatic pressure in the leaf xylem, ψ xylem, was measured non ...
David M. Deery +3 more
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Modeling soil water movement with water uptake by roots
Plant and Soil, 1999Soil water movement with root water uptake is a key process for plant growth and transport of water and chemicals in the soil-plant system. In this study, a root water extraction model was developed to incorporate the effect of soil water deficit and plant root distributions on plant transpiration of annual crops.
Jinquan Wu, Renduo Zhang, Shengxiang Gui
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Root water uptake and profile soil water as affected by vertical root distribution
Plant Ecology, 2006Water uptake by plant roots is a main process controlling water balance in field profiles and vital for agro-ecosystem management. Based on the sap flow measurements for maize plants (Zea mays L.) in a field under natural wet- and dry-soil conditions, we studied the effect of vertical root distribution on root water uptake and the resulted changes of ...
Gui-Rui Yu +3 more
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Modeling root water uptake: root water compensation and hydraulic redistribution
2017Root water uptake by plants mediates the exchange of water, carbon and energy between land surface and atmosphere and is important in hydrological, climatological, agricultural and ecological studies. Field measurements show that root water uptake could be significantly affected by root water compensation and hydraulic redistribution.
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Modeling Root Water Uptake in Hydrological and Climate Models
Bulletin of the American Meteorological Society, 2001Abstract From 30 September to 2 October 1999 a workshop was held in Gif–sur–Yvette, France, with the central objective to develop a research strategy for the next 3–5 years, aiming at a systematic description of root functioning, rooting depth, and root distribution for modeling root water uptake from local and regional to global scales.
Feddes, R.A. +10 more
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Sprinkler Irrigation, Roots and the Uptake of Water
1990Clearer perception and better modelling of soil water and chemical flow will be aided by improved measurement of the appropriate saturated and unsaturated flow characteristics of field soil. In situ measurements, at and near saturation are presented for two contrasting soils: the herbicided, coarse soil of an apple orchard, and a biologically-active ...
Clothier, B.E. +2 more
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Calibration of a Two‐Dimensional Root Water Uptake Model
Soil Science Society of America Journal, 2001Although solutions of multidimensional transient water flow can be obtained by numerical modeling, their application may be limited in part as root water uptake is generally considered to be one‐dimensional only. The objective of this study was to develop and test a two‐dimensional root water uptake model, which can be incorporated
Vrugt, J.A., Hopmans, J.W., Simunek, J.
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