Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors
Macropores can be important conduits for surface-derived nutrients to reach subsurface receptors. Accordingly, nutrient reactive transport processes in macroporous soils need to be well understood. In this study, steady-state two-dimensional reactive transport simulations with MIN3P-THCm (version 1....
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-06-01
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| Series: | Vadose Zone Journal |
| Online Access: | https://dl.sciencesocieties.org/publications/vzj/articles/18/1/190002 |
| _version_ | 1818293151928942592 |
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| author | Syed I. Hussain Steven K. Frey David W. Blowes Carol J. Ptacek David Wilson K. Ulrich Mayer Danyang Su Natalie Gottschall Mark Edwards David R. Lapen |
| author_facet | Syed I. Hussain Steven K. Frey David W. Blowes Carol J. Ptacek David Wilson K. Ulrich Mayer Danyang Su Natalie Gottschall Mark Edwards David R. Lapen |
| author_sort | Syed I. Hussain |
| collection | DOAJ |
| description | Macropores can be important conduits for surface-derived nutrients to reach subsurface receptors. Accordingly, nutrient reactive transport processes in macroporous soils need to be well understood. In this study, steady-state two-dimensional reactive transport simulations with MIN3P-THCm (version 1.0.519.0) were used to elucidate how soil macropore connectivity to tile drains can influence N transformations following liquid swine manure (LSM) applications to soil. Four different soil scenarios were considered: homogeneous sand, homogeneous clay loam, and clay loam with discrete macropores connected to or disconnected from the bottom boundary used to represent tile drain outflow. In relation to the homogeneous soils, macropores, overall, facilitated chemical diffusion into the adjacent soil matrix along their length and broadly augmented O ingress into the soil profile. These processes combined to critically control the spatial distribution of NH oxidation reaction products. When used in transient simulation mode with field data observed at experimental tile-drained plots that received LSM application, the model showed that simulated nitrate mass losses to tile are considerably higher and most realistic under the connected macropore scenario compared with the homogeneous or disconnected macropore scenarios. |
| first_indexed | 2024-12-13T03:11:18Z |
| format | Article |
| id | doaj.art-ee05c3ee0179428db5cff1326c86fcb2 |
| institution | Directory Open Access Journal |
| issn | 1539-1663 |
| language | English |
| last_indexed | 2024-12-13T03:11:18Z |
| publishDate | 2019-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Vadose Zone Journal |
| spelling | doaj.art-ee05c3ee0179428db5cff1326c86fcb22022-12-22T00:01:36ZengWileyVadose Zone Journal1539-16632019-06-0118110.2136/vzj2019.01.0002Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface ReceptorsSyed I. HussainSteven K. FreyDavid W. BlowesCarol J. PtacekDavid WilsonK. Ulrich MayerDanyang SuNatalie GottschallMark EdwardsDavid R. LapenMacropores can be important conduits for surface-derived nutrients to reach subsurface receptors. Accordingly, nutrient reactive transport processes in macroporous soils need to be well understood. In this study, steady-state two-dimensional reactive transport simulations with MIN3P-THCm (version 1.0.519.0) were used to elucidate how soil macropore connectivity to tile drains can influence N transformations following liquid swine manure (LSM) applications to soil. Four different soil scenarios were considered: homogeneous sand, homogeneous clay loam, and clay loam with discrete macropores connected to or disconnected from the bottom boundary used to represent tile drain outflow. In relation to the homogeneous soils, macropores, overall, facilitated chemical diffusion into the adjacent soil matrix along their length and broadly augmented O ingress into the soil profile. These processes combined to critically control the spatial distribution of NH oxidation reaction products. When used in transient simulation mode with field data observed at experimental tile-drained plots that received LSM application, the model showed that simulated nitrate mass losses to tile are considerably higher and most realistic under the connected macropore scenario compared with the homogeneous or disconnected macropore scenarios.https://dl.sciencesocieties.org/publications/vzj/articles/18/1/190002 |
| spellingShingle | Syed I. Hussain Steven K. Frey David W. Blowes Carol J. Ptacek David Wilson K. Ulrich Mayer Danyang Su Natalie Gottschall Mark Edwards David R. Lapen Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors Vadose Zone Journal |
| title | Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors |
| title_full | Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors |
| title_fullStr | Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors |
| title_full_unstemmed | Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors |
| title_short | Reactive Transport of Manure-Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors |
| title_sort | reactive transport of manure derived nitrogen in the vadose zone consideration of macropore connectivity to subsurface receptors |
| url | https://dl.sciencesocieties.org/publications/vzj/articles/18/1/190002 |
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