Paper
A Physically Based Microscopic Model of Root-Water Uptake
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Authors:
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Manoj K. Trivedi; Deepak Kashyap; Ajay Gairola
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Abstract
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The present study involves development of a microscopic numerical model for simulating radial and vertical moisture flow towards plant root, root-water uptake and finally flow through the plant to the atmosphere. The model essentially comprises a numerical solution of the Richard’s equation in axis-symmetric polar co-ordinate system by finite difference method. The simulation of the subsequent water movement (from root to canopy and from canopy to atmosphere) is accomplished indirectly through a boundary condition at the root-soil interface. This boundary condition is derived by invoking the meteorological conditions prevailing over the plant leaf surface, and a plant conductivity parameter (plant transmissivity) is defined herein. The model provides distribution of soil moisture content, and the root-water uptake at discrete times. The plant transmissivity has been estimated for wheat crop.
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Keywords
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Root-Water Uptake; Microscopic Model; Richard’s Equation; Transpiration
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StartPage
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54
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EndPage
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67
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Doi
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10.18005/JAEB0103002