Modeling tomato root water uptake influenced by soil salinity under drip irrigation with an inverse method

A variance-based global sensitivity analysis (extended Fourier amplitude sensitivity test, EFAST) was applied to the Feddes module of the HYDRUS-1D model, and the sensitivity indices including both main and total effects of actual root water uptake (RWUa) to seven Feddes parameters were quantified at different growth stages of sunflower (Helianthus annuus L.): seedling, bud, flowering and maturity. The effects of soil salinity, climate conditions, and crop root growth on parameter sensitivity were explored by analysing three precipitation frequencies and two maximum root depths across four field locations with different soil salinity levels in China’s sunflower-growing regions. Uncertainties for RWUa were evaluated at four stages with varying Feddes parameters for different field locations, precipitation frequencies and maximum root depths. We found that the water stress factor concerning ceasing root water uptake (h4), and two salt stress factors ht and Sp, indicating the salinity threshold and the slope of the curve determining the fractional decline in root water uptake per unit increase in salinity below the threshold, respectively, were three most important Feddes parameters for RWUa estimation in HYDRUS-1D. In addition, the effects of soil salinity and precipitation frequencies were stronger than maximum root depth on the order of the parameters’ impacts on RWUa. Our study suggested that h1, h2, h3h, and h3l might be determined by an economical method (e.g. literature review) in saline soils with limited observations, but it is better to calibrate wilting point (h4) and salt stress parameters (ht and Sp) based on local measurements.

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Simulation of soil water dynamics in structured heavy soils with respect to root water uptake

Biologia ◽

10.2478/s11756-006-0181-y ◽

2006 ◽

Vol 61 (19) ◽

Cited By ~ 3

Author(s):

David Zumr ◽

Michal Dohnal ◽

Miroslav Hrnčíř ◽

Milena Císlerová ◽

Tomáš Vogel ◽

...

Keyword(s):

Water Uptake ◽

Nitrogen Fertilization ◽

Drip Irrigation ◽

Soil Profile ◽

Water Regime ◽

Root Zone ◽

Root Water Uptake ◽

Water Dynamics ◽

Preferential Pathways ◽

The Impact

AbstractIn agricultural lands has the soil moisture uptake from the root system a significant effect on the water regime of the soil profile. In texturally heavy soils, where preferential pathways are present, infiltrated precipitation and irrigation water with diluted fertilizers quickly penetrate to a significant depth and often reach an under-root zone or even the ground-water level. Such a scenario is likely to happen during long summer periods without rain followed by heavy precipitation events, when a part of the water may flow through desiccated cracks.Since 2001 the effects of drip irrigation and nitrogen fertilization of potatoes (Solanum tuberosum L., cultivar Agria) have been monitored within the frame of a research project at the experimental site Valecov (Czech Republic). Based upon the measured data an attempt has been made to simulate the water regime of the soil profile at a selected experimental plot, considering the impact of preferential flow and root water uptake. The dual-permeability simulation model S_1D_Dual (VOGEL et al., 2000) was used for the simulation. The soil hydraulic parameters were inversely determined using Levenberg-Marquardt method. Measured and simulated pressure heads were utilized in the optimization criterion. The scaling approach was applied to simplify the description of the spatial variability of the soil profile.The results of simulations demonstrate that during particular rainfall events the water reaches significant depths of the soil profile via preferential pathways. The effect of the root zone is dominant during dry periods, when capillary water uptake from the layers below roots becomes important. This should be taken in account into the optimization of the drip irrigation and nitrogen fertilization schedule.

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The effects of rainfall and irrigation on cherry root water uptake under drip irrigation

Agricultural Water Management ◽

10.1016/j.agwat.2017.10.021 ◽

2018 ◽

Vol 197 ◽

pp. 9-18 ◽

Cited By ~ 10

Author(s):

Xiaoqing Cao ◽

Peiling Yang ◽

Bernard A. Engel ◽

Pingfeng Li

Keyword(s):

Water Uptake ◽

Drip Irrigation ◽

Root Water Uptake

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ESTIMATING ROOT-WATER-UPTAKE USING AN INVERSE METHOD

Soil Science ◽

10.1097/00010694-200209000-00001 ◽

2002 ◽

Vol 167 (9) ◽

pp. 561-571 ◽

Cited By ~ 30

Author(s):

Qiang Zuo ◽

Renduo Zhang

Keyword(s):

Water Uptake ◽

Inverse Method ◽

Root Water Uptake

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Impact of Drought and Changing Water Sources on Water Use and Soil Salinity of Almond and Pistachio Orchards: 2. Modeling

Soil Systems ◽

10.3390/soilsystems5040058 ◽

2021 ◽

Vol 5 (4) ◽

pp. 58

Author(s):

Sarah A. Helalia ◽

Ray G. Anderson ◽

Todd H. Skaggs ◽

Jirka Šimůnek

Keyword(s):

Water Uptake ◽

Soil Salinity ◽

Irrigation Water ◽

Root Zone ◽

Root Water Uptake ◽

Water Salinity ◽

Saline Irrigation ◽

Secondary Salinization ◽

Irrigation Water Salinity ◽

Soil Hydraulic

California is increasingly experiencing drought conditions that restrict irrigation deliveries to perennial nut crops such as almonds and pistachios. During drought, poorer quality groundwater is often used to maintain these crops, but this use often results in secondary salinization that requires skilled management. Process-based models can help improve management guidelines under these challenging circumstances. The main objective of this work was to assess seasonal soil salinity and root water uptake as a function of irrigation water salinity and annual rain amounts. The manuscript presents a comparison of three-year experimental and numerically simulated root zone salinities in and below the root zone of almond and pistachio drip-irrigated orchards at multiple locations in the San Joaquin Valley (SJV), California, with different meteorological characteristics. The HYDRUS-1D numerical model was calibrated and validated using field measurements of soil water contents and soil solute bulk electrical conductivities at four root zone depths and measured soil hydraulic conductivities. The remaining soil hydraulic parameters were estimated inversely. Observations and simulations showed that the effects of rain on root zone salinity were higher in fields with initially low salinities than in fields with high salinities. The maximum reduction in simulated root water uptake (7%) occurred in response to initially high soil salinity conditions and saline irrigation water. The minimum reduction in simulated water uptake (2.5%) occurred in response to initially low soil salinity conditions and a wet rain year. Simulated water uptake reductions and leaching fractions varied at early and late times of the growing season, depending on irrigation water salinity. Root water uptake reduction was highly correlated with the cumulative effects of using saline waters in prior years, more than salt leaching during a particular season, even when rain was sufficient to leach salts during a wet year.

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An Inverse Method to Estimate the Root Water Uptake Source-Sink Term in Soil Water Transport Equation under the Effect of Superabsorbent Polymer

PLoS ONE ◽

10.1371/journal.pone.0159936 ◽

2016 ◽

Vol 11 (8) ◽

pp. e0159936 ◽

Cited By ~ 6

Author(s):

Renkuan Liao ◽

Peiling Yang ◽

Wenyong Wu ◽

Shumei Ren

Keyword(s):

Transport Equation ◽

Soil Water ◽

Water Transport ◽

Water Uptake ◽

Inverse Method ◽

Root Water Uptake ◽

Superabsorbent Polymer ◽

Sink Term ◽

Source Sink ◽

Soil Water Transport

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Lateral stress induced due root-water-uptake in unsaturated soils

International Journal of Geomate ◽

10.21660/2013.7.2165 ◽

2013 ◽

Author(s):

Mu’azu Mohammed Abdullahi

Keyword(s):

Water Uptake ◽

Unsaturated Soils ◽

Root Water Uptake ◽

Lateral Stress

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Determining deep root water uptake patterns with tree age in the Chinese loess area

Agricultural Water Management ◽

10.1016/j.agwat.2021.106810 ◽

2021 ◽

Vol 249 ◽

pp. 106810

Author(s):

Ze Tao ◽

Eric Neil ◽

Bingcheng Si

Keyword(s):

Water Uptake ◽

Root Water Uptake ◽

Tree Age ◽

Chinese Loess ◽

Loess Area ◽

Deep Root ◽

Water Uptake Patterns

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Analysis of Soil Water Response to Grass Transpiration

Soil and Water Research ◽

10.17221/6510-swr ◽

2013 ◽

Vol 1 (No. 3) ◽

pp. 85-98

Author(s):

Dohnal Michal ◽

Dušek Jaromír ◽

Vogel Tomáš ◽

Herza Jiří

Keyword(s):

Soil Water ◽

Water Uptake ◽

Preferential Flow ◽

Water Movement ◽

Control Volume ◽

Water Pressure ◽

Lower Boundary ◽

Root Water Uptake ◽

Water Dynamics ◽

Soil Water Dynamics

This paper focuses on numerical modelling of soil water movement in response to the root water uptake that is driven by transpiration. The flow of water in a lysimeter, installed at a grass covered hillslope site in a small headwater catchment, is analysed by means of numerical simulation. The lysimeter system provides a well defined control volume with boundary fluxes measured and soil water pressure continuously monitored. The evapotranspiration intensity is estimated by the Penman-Monteith method and compared with the measured lysimeter soil water loss and the simulated root water uptake. Variably saturated flow of water in the lysimeter is simulated using one-dimensional dual-permeability model based on the numerical solution of the Richards’ equation. The availability of water for the root water uptake is determined by the evaluation of the plant water stress function, integrated in the soil water flow model. Different lower boundary conditions are tested to compare the soil water dynamics inside and outside the lysimeter. Special attention is paid to the possible influence of the preferential flow effects on the lysimeter soil water balance. The adopted modelling approach provides a useful and flexible framework for numerical analysis of soil water dynamics in response to the plant transpiration.

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