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Agronomy Journal Abstract -

Evapotranspiration by Bermudagrass Sod, Cynodon dactylon L. Pers., in Hawaii1


This article in AJ

  1. Vol. 58 No. 4, p. 387-390
    Received: Dec 15, 1965

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  1. Paul C. Ekern2



Evapotranspiration by bermudagrass sod planted in Wahiawa Low Humic Latosol was measured in percolate and hydraulic lysimeters on Oahu. Under high potential evaporation rates, the consumptive use of water by sod was essentially the same as class A pan evaporation when soil moisture stress was small. As the soil moisture stress increased, the grass sod maintained high rates of water use until the soil moisture stress exceeded 1 bar, but was unable to maintain these rates as the soil moisture stress increased toward the 15-bar point. This action was in decided contrast to the self-mulching action of bare Low Humic Latosol for which low evaporation rates developed for moisture stress of 0.15 bar (field capacity). Dew distillation rather than dew fall was a consistent pattern for water transfer at night.

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