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

Title
In-situ partitioning of evaporation and transpiration components using a portable evapotranspiration dome-A case study in Tall Fescue (Festuca arundinacea)
Publication Date
2019-03
Author(s)
Alam, Muhammad Shahinur
Rahman, Muhammad Moshiur
( author )
OrcID: https://orcid.org/0000-0001-6430-0588
Email: mrahma37@une.edu.au
UNE Id une-id:mrahma37
Lamb, David W
( author )
OrcID: https://orcid.org/0000-0002-2917-2231
Email: dlamb@une.edu.au
UNE Id une-id:dlamb
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Elsevier BV
Place of publication
Netherlands
DOI
10.1016/j.agwat.2018.10.042
UNE publication id
une:1959.11/26764
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.
Link
Citation
Agricultural Water Management, v.213, p. 352-357
ISSN
1873-2283
0378-3774
Start page
352
End page
357

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