ABSTRACT
ABSTRACT: According to the fractal theory, this thesis attempts to study the soil structure and its physic-chemical properties of the five different forests (Chestnut forest, glauca forest, Christmas tree plantation, mixed forest, Chinese fir forest) in Dongfeng reservoir of Yuxi, so as to establish a correlation formula between soil volume percentage content and its fractal dimension of those forests, as well as the regression model of fractal dimension of soil volume percentage content and corresponding index of soil’s physic-chemical properties. The result shows that fractal dimension of different soil granularity is between 2.358 to 2.442, that significant linear correlation exists between soil volume percentage content, whose particle size is less than 0.02 mm, and fractal dimension. Also the result tells us that soil volume fractal dimension is significantly positively correlated with density, total porosity, total nitrogen, available phosphorus, available potassium, total phosphorus, total potassium and hydrolysable nitrogen respectively. Thus it is so clear that the application of fractal theory in studying the forest soil’s physic-chemical properties provides a new method for woodland evaluation.
