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In-situ partitioning of evaporation and transpiration components using a portable evapotranspiration dome : A case study in Tall Fescue (Festuca arundinacea)

Citation

Alam, MS and Lamb, DW and Rahman, MM, In-situ partitioning of evaporation and transpiration components using a portable evapotranspiration dome : A case study in Tall Fescue (Festuca arundinacea), Agricultural Water Management: An International Journal, 213 pp. 352-357. ISSN 0378-3774 (2019) [Refereed Article]


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Copyright Statement

Copyright (2018) Elsevier B.V. All rights reserved. This article is distributed under the Creative Commons CC BY-NC-ND 4.04.0 license (https://creativecommons.org/licenses/by-nc-nd/4.0/).

DOI: doi:10.1016/j.agwat.2018.10.042

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.

Item Details

Item Type:Refereed Article
Keywords:Evapotranspiration, Stomatal Conductance, Crop coefficient
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Agriculture, land and farm management
Research Field:Agricultural hydrology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the agricultural, food and veterinary sciences
UTAS Author:Alam, MS (Mr Muhammad Shahinur Alam)
ID Code:154543
Year Published:2019
Web of Science® Times Cited:4
Deposited By:TIA - Research Institute
Deposited On:2022-12-12
Last Modified:2023-01-13
Downloads:1 View Download Statistics

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