[Simulation of soil water dynamics in triploid Populus tomentosa root zone under subsurface drip irrigation].
Identifieur interne : 002C38 ( Main/Exploration ); précédent : 002C37; suivant : 002C39[Simulation of soil water dynamics in triploid Populus tomentosa root zone under subsurface drip irrigation].
Auteurs : Ben-Ye Xi [République populaire de Chine] ; Li-Ming Jia ; Ye Wang ; Guang-De LiSource :
- Ying yong sheng tai xue bao = The journal of applied ecology [ 1001-9332 ] ; 2011.
Descripteurs français
- KwdFr :
- MESH :
- analyse : Eau, Sol.
- croissance et développement : Populus, Racines de plante.
- méthodes : Irrigation agricole, Science forêt.
- Chine, Mouvements de l'eau, Simulation numérique, Écosystème.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Soil, Water.
- growth & development : Plant Roots, Populus.
- methods : Agricultural Irrigation, Forestry.
- China, Computer Simulation, Ecosystem, Water Movements.
Abstract
Based on the observed data of triploid Populus tomentosa root distribution, a one-dimensional root water uptake model was proposed. Taking the root water uptake into account, the soil water dynamics in triploid P. tomentosa root zone under subsurface drip irrigation was simulated by using HYDRUS model, and the results were validated with field experiment. Besides, the HYDRUS model was used to study the effects of various irrigation technique parameters on soil wetting patterns. The RMAE for the simulated soil water content by the end of irrigation and approximately 24 h later was 7.8% and 6.0%, and the RMSE was 0.036 and 0.026 cm3 x cm(-3), respectively, illustrating that the HYDRUS model performed well in simulating the short-term soil water dynamics in triploid P. tomentosa root zone under drip irrigation, and the root water uptake model was reasonable. Comparing with 2 and 4 L x h(-1) of drip discharge and continuous irrigation, both the 1 L x h(-1) of drip discharge and the pulsed irrigation with water applied intermittently in 30 min periods could increase the volume of wetted soil and reduce deep percolation. It was concluded that the combination of 1 L x h(-1) of drip discharge and pulsed irrigation should be the first choice when applying drip irrigation to triploid P. tomentosa root zone at the experiment site.
PubMed: 21548283
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<author><name sortKey="Xi, Ben Ye" sort="Xi, Ben Ye" uniqKey="Xi B" first="Ben-Ye" last="Xi">Ben-Ye Xi</name>
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<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Province-Ministry Co-construct Key Laboratory of Silviculture and Conservation of Education Ministry, Beijing Forestry University, Beijing 100083</wicri:regionArea>
<placeName><settlement type="city">Pékin</settlement>
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<author><name sortKey="Jia, Li Ming" sort="Jia, Li Ming" uniqKey="Jia L" first="Li-Ming" last="Jia">Li-Ming Jia</name>
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<author><name sortKey="Wang, Ye" sort="Wang, Ye" uniqKey="Wang Y" first="Ye" last="Wang">Ye Wang</name>
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<author><name sortKey="Li, Guang De" sort="Li, Guang De" uniqKey="Li G" first="Guang-De" last="Li">Guang-De Li</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agricultural Irrigation (methods)</term>
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<term>Ecosystem (MeSH)</term>
<term>Forestry (methods)</term>
<term>Plant Roots (growth & development)</term>
<term>Populus (growth & development)</term>
<term>Soil (analysis)</term>
<term>Water (analysis)</term>
<term>Water Movements (MeSH)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Chine (MeSH)</term>
<term>Eau (analyse)</term>
<term>Irrigation agricole (méthodes)</term>
<term>Mouvements de l'eau (MeSH)</term>
<term>Populus (croissance et développement)</term>
<term>Racines de plante (croissance et développement)</term>
<term>Science forêt (méthodes)</term>
<term>Simulation numérique (MeSH)</term>
<term>Sol (analyse)</term>
<term>Écosystème (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Soil</term>
<term>Water</term>
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<term>Racines de plante</term>
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<term>Populus</term>
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<term>Computer Simulation</term>
<term>Ecosystem</term>
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<front><div type="abstract" xml:lang="en">Based on the observed data of triploid Populus tomentosa root distribution, a one-dimensional root water uptake model was proposed. Taking the root water uptake into account, the soil water dynamics in triploid P. tomentosa root zone under subsurface drip irrigation was simulated by using HYDRUS model, and the results were validated with field experiment. Besides, the HYDRUS model was used to study the effects of various irrigation technique parameters on soil wetting patterns. The RMAE for the simulated soil water content by the end of irrigation and approximately 24 h later was 7.8% and 6.0%, and the RMSE was 0.036 and 0.026 cm3 x cm(-3), respectively, illustrating that the HYDRUS model performed well in simulating the short-term soil water dynamics in triploid P. tomentosa root zone under drip irrigation, and the root water uptake model was reasonable. Comparing with 2 and 4 L x h(-1) of drip discharge and continuous irrigation, both the 1 L x h(-1) of drip discharge and the pulsed irrigation with water applied intermittently in 30 min periods could increase the volume of wetted soil and reduce deep percolation. It was concluded that the combination of 1 L x h(-1) of drip discharge and pulsed irrigation should be the first choice when applying drip irrigation to triploid P. tomentosa root zone at the experiment site.</div>
</front>
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<Abstract><AbstractText>Based on the observed data of triploid Populus tomentosa root distribution, a one-dimensional root water uptake model was proposed. Taking the root water uptake into account, the soil water dynamics in triploid P. tomentosa root zone under subsurface drip irrigation was simulated by using HYDRUS model, and the results were validated with field experiment. Besides, the HYDRUS model was used to study the effects of various irrigation technique parameters on soil wetting patterns. The RMAE for the simulated soil water content by the end of irrigation and approximately 24 h later was 7.8% and 6.0%, and the RMSE was 0.036 and 0.026 cm3 x cm(-3), respectively, illustrating that the HYDRUS model performed well in simulating the short-term soil water dynamics in triploid P. tomentosa root zone under drip irrigation, and the root water uptake model was reasonable. Comparing with 2 and 4 L x h(-1) of drip discharge and continuous irrigation, both the 1 L x h(-1) of drip discharge and the pulsed irrigation with water applied intermittently in 30 min periods could increase the volume of wetted soil and reduce deep percolation. It was concluded that the combination of 1 L x h(-1) of drip discharge and pulsed irrigation should be the first choice when applying drip irrigation to triploid P. tomentosa root zone at the experiment site.</AbstractText>
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