Distribuição da evaporação no interior de um ambiente protegido.

Abstract

This work aimed to study evaporation measurement alternatives in protected environment. The experiment was set up in polyethylene greenhouse at winter 2005 period. 132 microevaprimeters (13.7 cm diameter) at three heights, 0.40, 0.80 and 1.20 cm from the soil surface were distributed at 44 equidistant points. The greenhouse, tunnel type, with 7.5 m width, 27.5 m length and 3.20 m height at the center received “sombrite” at the laterals. The orientation was southeast /northwest, based on true north. For data evaluation, Geostatistic was used with βGS+ program. The following conclusions were obtained: - there was spatial variability at different regions and heights of the microevaporimeters with larger values next to soil surface in July; the evaporation values obtained from microevaporimeters were not statistical different from those obtained from Class “A” Pan installed at the center of the greenhouse; the Class “A” Pan installed out of the greenhouse can be used to evaluated the internal evaporation.