Abstract
Soil 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. For several annual crops, normalized root density distribution functions were established to characterize the relative distributions of root density at different growth stages. The ratio of actual to potential cumulative transpiration was used to determine plant leaf area index under water stress from measurements of plant leaf area index at optimal soil water condition. The root water uptake model was implemented in a numerical model. The numerical model was applied to simulate soil water movement with root water uptake and simulation results were compared with field experimental data. The simulated soil matric potential, soil water content and cumulative evapotranspiration had reasonable agreement with the measured data. Potentially the numerical model implemented with the root water extraction model is a useful tool to study various problems related to flow transport with plant water uptake in variably saturated soils.
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References
Feddes R A, Bresler E and Neuman S P 1974 Field test of a modified numerical model forwater uptake by root systems. Water Res. Res. 10, 1199–1206.
Feddes R A, Kowalik P J and Zaradny H 1978Water uptake by plant roots. InSimulation of Field Water Use and Crop Yield. Eds RA Feddes, PJ Kowalik and H Zaradny. pp 16–30. John Wiley & Sons, Inc., New York.
Gardner W R 1960 Dynamic aspects of water availability to plants. Soil Sci. 89, 63–73.
Gardner WR 1983 Soil properties and efficient water use: A review. InLimitations to Efficient Water Use in Crop Production. Eds HM Taylor, WR Jordan and TR Sinclair. pp 45–64. SSSA, 677 South Segoe Road, Madison.
Gardner F P, Pearce R B and Mitchell R L 1985 Physiology of crop plants. The Iowa State University Press, Ames, Iowa 50010.
Heichel G H 1983 Alfalfa. In Crop-water Relations. Eds ID Teare and MM Peet. pp 127–155. John Wiley & Sons, Inc., New York.
Hillel D, Talpaz H and Van Keulen H 1976 A macroscopic-scale model of water uptake by a nonuniform root system and of water and salt movement in the soil profile. Soil Sci. 121, 242–255.
Hopkins W G 1999 Water relations of the whole plant. In Introduction to Plant Physiology. Ed.WG Hopkins. pp 37–59. JohnWiley & Sons, Inc., New York.
Jordan W R 1983 Cotton. InCrop-Water Relations. Eds. ID Teare and MM Peet. pp 213–253. John Wiley & Sons, Inc., New York.
Jury W A, Gardner W R and Gardner W H 1991 Soil physics. John Wiley & Sons, Inc., New York. 328 p.
Kramer P J and Boyer J S 1995 The absorption of water and root and stem pressures. InWater Relations of Plants and Soils. Eds PJ Kramer and JS Boyer. pp 167–200. Academic Press, Inc., San Diego.
Mayaki W C, Teare I D and Stone L R 1976 Top and root growth of irrigated and nonirrigated soybeans. Crop Sci. 16, 92–94.
Merrill S D 1992Pressurized-wall minirhizotron for field observation of root growth dynamics. Agron. J. 84, 755–758.
Merrill S D, Doering E J and Reichman G A 1987 Application of a minirhizotron with flexible, pressurized walls to a study of corn root growth, Minirhizotron Observation Tubes: Methods and applications for measuring rhizosphere dynamics. ASA special publication. ASA, 677 Segoe Road, Madison. 50, 131–143.
Molz F J 1981 Models of water transport in the soil-plant system: A review. Water Res. Res. 17, 1245–1260.
Molz F J and Remson I 1970 Extraction term models of soil moisture use by transpiring plants. Water Res. Res. 6, 1346–1356.
Monteith J L 1965 Evaporation and environment. Proc. Symp. Soc. Exp. Biol. 19, 205–234.
Nimah M N and Hanks R J 1973 Model for estimating soil water, plant and atmospheric interrelations: I. Description and Sensitivity. Soil Sci. Soc. Am. Proc. 37, 522–532.
Prasad R 1988 A linear root water uptake model. J. Hydrol. 99, 297–306.
Raats P A C 1976 Analytical solutions of a simplified flow equation. Trans. ASAE. 19, 683–689.
Ritchie J T 1972 A model for predicting evaporation from a row crop with incomplete cover. Water Res. Res. 8, 1204–1213.
Rowse H R, Stone D A and Gerwitz A 1978 Simulation of the water distribution in soil, II. The model for cropped soil and its comparison with experiment. Plant Soil. 49, 533–550.
Schmidhalter U, Selim H M and Oertli J J 1994Measuring and modeling root water uptake based on chloride discrimination in a silt loam soil affected by groundwater. Soil Sci. 158, 97–105.
Simunek J, Vogel T and Van Genuchten MTh 1992 The SWMS_2D code for simulating water flow and solute transport in twodimensional variably saturated media, V.1.1, Research Report No. 126, U.S. Salinity Lab, ARS USDA, Riverside.
Stibbe E and Hadas A 1977 Response of dryland cotton plant growth, soil-water uptake and lint yield to two extreme types of tillage. Agron. J. 69, 447–451.
Tanner C B and Sinclair T R 1983 Efficient water use in crop production: Research or re-search? In Limitations to Efficient Water Use in Crop Production. Eds HM Taylor, WR Jordan and TR Sinclair. pp 1–27. SSSA, 677 South Segoe Road, Madison.
Upchurch D R and Ritchie J T 1984 Battery-operated color video camera for root observations in minirhizotrons. Agron. J. 76, 1015–1017.
Van Genuchten M Th 1980 A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44, 892–897.
Vogel T, K Huang, R Zhang and Van Genuchten M Th 1992 The HYDRUS code for simulating one-dimensional water flow, solute transport and heat movement in variably saturated media, V.5.0, Research Report No. 140, U.S. Salinity Lab, ARS USDA, Riverside.
Vos J and Groenwold J 1987 The relation between root growth along observation tubes and in bulk soil. Minirhizotron Observation Tubes: Methods and applications for measuring rhizosphere Dynamics. ASA special publication. ASA, 677 Segoe Road, Madison 50, 39–49.
Wallach R 1990 Soil water distribution in a nonuniformly irrigated field with root extraction. J. Hydrol. 119, 137–150.
Wu J, Zhang R and Yang J 1996 Analysis of rainfall-recharge relationships.J. Hydrol. 177, 143–160.
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Wu, J., Zhang, R. & Gui, S. Modeling soil water movement with water uptake by roots. Plant and Soil 215, 7–17 (1999). https://doi.org/10.1023/A:1004702807951
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DOI: https://doi.org/10.1023/A:1004702807951