Evapotranspiration Rate of Lettuce (Lactuca sativa L., Asteraceae) in a Non-Circulating Hydroponics System

Vivencio A. Pelesco, Feliciano B. Alagao


This paper analyzed how the evapotranspiration (ETc) of lettuce in a non-circulating hydroponics system correlates with the reference crop evapotranspiration (ETo) and the age of the plant. Regression analysis was carried out to determine the relationship between ETc with the ETo and the age of the plant. Fully developed and mature lettuce plants consumed much water, and the changes in climatic conditions also caused a significant change in water consumption during this stage of growth. The ETc of lettuce in non-circulating hydroponics correlates with the climatic condition and the age of the plant. Water demand for lettuce in non-circulating hydroponics is high at higher reference evapotranspiration and for mature plants.


water demand; reference evapotranspiration; climatic condition; vegetable


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