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Title: In-situ partitioning of evaporation and transpiration components using a portable evapotranspiration dome-A case study in Tall Fescue (Festuca arundinacea)
Contributor(s): Alam, Muhammad Shahinur (author); Rahman, Muhammad Moshiur  (author)orcid ; Lamb, David W  (author)orcid 
Publication Date: 2019-03
Early Online Version: 2018-11-05
DOI: 10.1016/j.agwat.2018.10.042
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Abstract: Understanding the components of water consumption of a crop or pasture through evapotranspiration is important for improving water management. In this study the FAO dual crop coefficient methodology has been used in conjunction with a portable evapotranspiration chamber in-situ, to quantify the basal crop (Kcb ) and soil evaporation (Ke ) coefficients of a pasture as a function of leaf area index and a widely used spectro-optical reflectance index, NDVI. To facilitate the measurement of soil evaporation component, small segments of the green biomass of a target pasture canopy, Tall Fescue (Festuca arundinacea var. Dovey) were allowed to rapidly senesce by applying a commercial herbicide while preserving the soil moisture and canopy structure. The ratio between the transpiration and evapotranspiration components (Kcb/Kc) increased from 0.03 to 0.46 for zero to highest available vegetation cover (LAI from 0 to 4.22). A significant linear relationship was observed between Kcb and NDVI (R² = 0.88) suggesting the possibility of using the latter, for example through remote sensing technologies, to determine the former.
Publication Type: Journal Article
Source of Publication: Agricultural Water Management, v.213, p. 352-357
Publisher: Elsevier BV
Place of Publication: Netherlands
ISSN: 1873-2283
Fields of Research (FoR) 2008: 070304 Crop and Pasture Biomass and Bioproducts
070104 Agricultural Spatial Analysis and Modelling
Fields of Research (FoR) 2020: 300405 Crop and pasture biomass and bioproducts
300206 Agricultural spatial analysis and modelling
Socio-Economic Objective (SEO) 2008: 829805 Management of Water Consumption by Plant Production
830403 Native and Residual Pastures
Socio-Economic Objective (SEO) 2020: 260104 Management of water consumption by plant production
100503 Native and residual pastures
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Science and Technology

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