Variação da umidade e da densidade do solo sob diferentes coberturas vegetais

The watershed regarded as a natural landscape, has been showing increasing its natural condition of spatial definition of an ecosystem, within which it is possible the detailed study of the interactions among the attributes that involve the properties of the soil. This study aimed to analyze the variability of moisture and density of soil under different vegetation covers a watershed, located in the municipality of Alegre - ES. The depth was analyzed 15-20 cm, a Latosol Red-yellow. The physical tests were carried out in accordance with routine laboratory methods of soil science. Through physical, we can see that the moisture influence on the values of linear density of the soil. There are considerable differences of soil moisture, showing that the soil under eucalyptus plantation (Site 2) is almost always more moist the soil of other sites. In profile analysis, you can probably see fluctuations due to higher rates of evaporation direct soil. The vegetation cover and soil use also showed an influence on the soil density, generating different values for this attribute, getting more value on the site 3 (pasture) and lower value on the site 5 (initial regeneration). The method of the ring volume, to determine the soil density, can generate faults, is highly influenced by the state of soil moisture.