We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Development, calibration and validation of weighing lysimeters for measurement of evapotranspiration of crops.
- Authors
Fenner, William; Dallacort, Rivanildo; Faria Junior, Cleonir A.; de Freitas, Paulo S. L.; de Queiroz, Tadeu M.; Santi, Adalberto
- Abstract
The evapotranspiration process is critical to studies on the water balance and water demand of crops and can be determined by several methods. A widely-used method, despite its high installation costs, is weighing lysimeters, which consists of a box over a balance connected to a load cell that monitors variations in the soil-water-plant-atmosphere system. The aim of this study was to develop and calibrate six weighing lysimeters (with dimensions of 1.5 x 1.5 x 1.2 m each) by high precision load cells, testing their ability to measure water mass changes in field conditions and cultivated with common bean (Phaseolus vulgaris L.), in the city of Tangará da Serra, in the state of Mato Grosso, Brazil. All lysimeters showed coefficients of determination higher than 0.99, as well as Willmott indexes, correlation and high confidence indexes, indicating that the equipment is suitable for measuring mass variations in water balance and evapotranspiration studies, representing the reality which occurred in the field.
- Subjects
MATO Grosso (Brazil : State); BRAZIL; COMMON bean; EVAPOTRANSPIRATION measurement; CROPS
- Publication
Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi, 2019, Vol 23, Issue 4, p297
- ISSN
1807-1929
- Publication type
Article
- DOI
10.1590/1807-1929/agriambi.v23n4p297-302