Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model
The main purpose of this paper is to compare the actual transpiration rates from tomato crop, as measured at leaf scale and estimated by a macroscopic approach in an agro-hydrological model, named FLOWS-HAGES, under variable soil properties and water availability. To this aim, sixteen plots were cul...
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| Format: | Article |
| Language: | English |
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PAGEPress Publications
2023-06-01
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| Series: | Journal of Agricultural Engineering |
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| Online Access: | https://www.agroengineering.it/index.php/jae/article/view/1527 |
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| author | Ameneh Sobhani Shawkat B.M. Hassan Giovanna Dragonetti Raffaella Balestrini Mauro Centritto Antonio Coppola Alessandro Comegna |
| author_facet | Ameneh Sobhani Shawkat B.M. Hassan Giovanna Dragonetti Raffaella Balestrini Mauro Centritto Antonio Coppola Alessandro Comegna |
| author_sort | Ameneh Sobhani |
| collection | DOAJ |
| description | The main purpose of this paper is to compare the actual transpiration rates from tomato crop, as measured at leaf scale and estimated by a macroscopic approach in an agro-hydrological model, named FLOWS-HAGES, under variable soil properties and water availability. To this aim, sixteen plots were cultivated with tomatoes in Metaponto, Southern Italy. Soil hydraulic properties (SHP) were obtained using a fast in-situ characterization method. Leaf-area index (LAI) was measured using a leaf-area meter. SHP and LAI were then used in the physically-based FLOWS-HAGES which allowed calculating the macroscopic transpiration rates, Ta,m. Single-leaf transpiration rates, Ta,l, and stomatal conductance, gs,l, were measured in situ. For comparing with Ta,m, gs,l was upscaled by Big-Leaf approach to canopy scale stomatal conductance, gs,c, which was applied to Penman-Monteith model to obtain the canopy-scale transpiration, Ta,c. Finally, multiple linear regression (MLR) was used to find the statistical relationship between Ta,m and Ta,c, and the SHP and gs,c. Results showed that the macroscopic approach smooths the spatial variability of transpiration rates. Ta,c increased with the saturated water content, θs, and the slope of the water retention curve, n, while Ta,m decreased with increasing θs and n. MLR improved significantly by introducing gs,c to predict Ta,m.
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| format | Article |
| id | doaj.art-a7e6a8ce84ea4a3a905f0a66b1949e6d |
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| issn | 1974-7071 2239-6268 |
| language | English |
| last_indexed | 2024-03-13T04:18:00Z |
| publishDate | 2023-06-01 |
| publisher | PAGEPress Publications |
| record_format | Article |
| series | Journal of Agricultural Engineering |
| spelling | doaj.art-a7e6a8ce84ea4a3a905f0a66b1949e6d2023-06-20T19:11:19ZengPAGEPress PublicationsJournal of Agricultural Engineering1974-70712239-62682023-06-0110.4081/jae.2023.1527Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological modelAmeneh Sobhani0Shawkat B.M. Hassan1Giovanna Dragonetti2Raffaella Balestrini3Mauro Centritto4Antonio Coppola5Alessandro Comegna6School of Agricultural, Forestry, Food and Environmental Sciences (SAFE), University of Basilicata, PotenzaSchool of Agricultural, Forestry, Food and Environmental Sciences (SAFE), University of Basilicata, PotenzaMediterranean Agronomic Institute of Bari, Land and Water Resources Management Division, Valenzano (BA)Institute for Sustainable Plant Protection (IPSP), National Research Council (CNR), TurinInstitute for Sustainable Plant Protection (IPSP), National Research Council (CNR), TurinSchool of Agricultural, Forestry, Food and Environmental Sciences (SAFE), University of Basilicata, Potenza; Department of Chemical and Geological Sciences, University of Cagliari, Monserrato (CA)School of Agricultural, Forestry, Food and Environmental Sciences (SAFE), University of Basilicata, PotenzaThe main purpose of this paper is to compare the actual transpiration rates from tomato crop, as measured at leaf scale and estimated by a macroscopic approach in an agro-hydrological model, named FLOWS-HAGES, under variable soil properties and water availability. To this aim, sixteen plots were cultivated with tomatoes in Metaponto, Southern Italy. Soil hydraulic properties (SHP) were obtained using a fast in-situ characterization method. Leaf-area index (LAI) was measured using a leaf-area meter. SHP and LAI were then used in the physically-based FLOWS-HAGES which allowed calculating the macroscopic transpiration rates, Ta,m. Single-leaf transpiration rates, Ta,l, and stomatal conductance, gs,l, were measured in situ. For comparing with Ta,m, gs,l was upscaled by Big-Leaf approach to canopy scale stomatal conductance, gs,c, which was applied to Penman-Monteith model to obtain the canopy-scale transpiration, Ta,c. Finally, multiple linear regression (MLR) was used to find the statistical relationship between Ta,m and Ta,c, and the SHP and gs,c. Results showed that the macroscopic approach smooths the spatial variability of transpiration rates. Ta,c increased with the saturated water content, θs, and the slope of the water retention curve, n, while Ta,m decreased with increasing θs and n. MLR improved significantly by introducing gs,c to predict Ta,m. https://www.agroengineering.it/index.php/jae/article/view/1527Agro-hydrological modellingcanopy-scale transpirationleaf-scale transpirationsoil hydraulic properties |
| spellingShingle | Ameneh Sobhani Shawkat B.M. Hassan Giovanna Dragonetti Raffaella Balestrini Mauro Centritto Antonio Coppola Alessandro Comegna Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model Journal of Agricultural Engineering Agro-hydrological modelling canopy-scale transpiration leaf-scale transpiration soil hydraulic properties |
| title | Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model |
| title_full | Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model |
| title_fullStr | Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model |
| title_full_unstemmed | Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model |
| title_short | Comparing actual transpiration fluxes as measured at leaf-scale and calculated by a physically based agro-hydrological model |
| title_sort | comparing actual transpiration fluxes as measured at leaf scale and calculated by a physically based agro hydrological model |
| topic | Agro-hydrological modelling canopy-scale transpiration leaf-scale transpiration soil hydraulic properties |
| url | https://www.agroengineering.it/index.php/jae/article/view/1527 |
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