Study on soil fractal and nutrient characteristics under forests of Quercus variabilis Bl.of different ages
In order to describe the fractal characteristics of soil particle-size under the influence of Quercus variabilis which is in different age of growth in the semi-arid area of Taihang Mountain,this paper,using the principle of soil particle distribution and fractal theory,through field investigation and laboratory analysis,studied the fractal characteristics and nutrient characteristics of soil particle-size under four different ages of Quercus variabilis in Taihang Mountain.The results showed that,1) The distribution of soil particle-size in different ages was significantly different,and the content of clay granules increased with the increase of age,and the content of sand grains decreased with the increase of age;2) The fractal dimension ranged from 1.35 ～ 2.61,and the mean value was 2.14.The fractal dimension was positively correlated with the soil clay content and negatively correlated with the sand content;3) The soil physical and chemical properties were also significantly different.The content of available phosphorus and organic matter of 40-year-old Quercus was significantly higher than that of the 10-year-old,and the content of total nitrogen was not significant.The contents of total N,available phosphorus and organic matter were all positively correlated with the fractal dimension D.
soil particle-sizefractal dimensionnutrient characteristicsdifferent age
国家科技期刊平台
NSTL
万方数据
维普
