Energy balance components were determined in a pearl millet (Pennisetum americamum, Leek) crop, in Eldorado do Sul, at 30°05'22"S, 51°40'18"W and 40m altitude, during 1988/89 growing season. The evaporation latent heat flux used the highest fraction of energy balance in the sistem, and varied inversely to the soil water availability. The soil heat flux varied inversely to the leaf area index, and utilized the lowest fraction of the net radiation. In general, sensible heat flux in the air and soil were positive early in the morning and in late afternoon. Advective energy incoming was detected during the daytime, when the vertical temperature gradient was inverted near the canopy surface.
energy balance; millet; micrometeorology
