COMPARISON OF SOIL PROPERTIES FOR EUCALYPTUS FOREST AND PINUS YUNNANENSIS FOREST IN JIULONGDIAN WATER SOURCE AREA

By referring to the properties of local Secondary Pinus Yunnanensis forest soil,with system analysis on soil's physical properties of Eucalyptus forest,in the different growth stage,reveal the process of eucalyptus planting result in soil structure transformation.The determination results of analysis show that:relative to Secondary Pinus Yunnanensis forest,the bulk density、content of fine particles in different growth stag of eucalyptus forest soil showed higher values;However,the values of natural moisture content,saturated water content,total porosity,capillary porosity,organic matter content equivalents was small.So,the eucalyptus planting change the soil formed under native vegetation,resulted in deterioration of soil structure.