Comportamento da umidade do solo em floresta de cambará e pastagem no Pantanal Mato-Grossense

Abstract

The present work aimed to investigate the water behavior in ground profile through soil moisture sensors in areas of cambará forest and pasture within the dry and rainy seasons on Pantanal of Mato-Grosso State. The data was obtained from soil moisture sensors connected to micrometeorological stations which were installed during the Julian days 68 to 88 of year 2010 and 326 to 34 of 2010/2011 on pasture and 210 to 270 of 2010 on cambará forest. Among the pasture area, on dry and rainy seasons, the profile of 30cm deep was who showed the highest variations on soil moisture, due to being the shallowest profile it suffers from wind conditions, precipitation and also from high incidence of solar radiation, which presented the maximum of 750 Wm-2

, the soil moisture on profiles of 50 and 70 cm deep varied 2% in the dry season and in the rainy season presented average of 45.7% and 45.3%, respectively. On the cambará forest, due to the clayey soil and to the solar radiation which is attenuated when passes through the canopy, the soil moisture concentrations presented were higher then presented in the pasture, even on the rainy season, and the profile who presented the highest variation was the 50cm deep, which varied 10% and the profile with lowest variation was the 90 cm deep, which varied only 2.2% during the study.