The important influence of soil structure on fertility
Research on soil has started since we began to engage in agriculture. The contents of soil research include soil nutrients, fertility, and water moisture. The appearance of soil analyzers has greatly facilitated soil research, and soil analyzers can be easily implemented. The analysis and testing of soil conditions are suitable for soil conditions in most parts of China. They are widely used and are good helpers for agricultural workers.
In the study of soil fertility, more and more studies have described soil structure and fertility characteristics. Some studies have shown that the fractal dimension of soil particles and the fractal dimension of aggregates can be used as erosion indicators, and the former is related to soil erodibility factors. Significant, while the latter can reflect the characteristics of soil structure, but also as indicators of infiltration of water. The fractal dimension of the soil is also significantly associated with the soil organic matter content that characterizes sandy desertification and the important value of the indicator plant, and can be used to characterize the degree of sandy desertification.
Desertification is the main form of land degradation in the Southwest. The soil in the area is thin, and the direct contact between the soil layer and the bedrock makes the soil's adhesion poor. Once the vegetation is destroyed, the rain will wash the surface and water and soil loss will occur. Vegetation restoration is very important to improve the regional ecological environment and promote economic development. Studying the fractal dimension of soil can help to evaluate the effect of vegetation on soil and the role of vegetation in soil and water conservation. So far, the research on the fractal dimension of soil has been mainly concentrated in the Loess Plateau region. There are few studies on the karst ecologically fragile areas in Southwest China, especially the reports on the relationship between soil fractal characteristics and soil properties.
In the mountainous area, research on the change of soil fractal dimension in the process of vegetation restoration to explore the characteristics of soil structure in the process of vegetation restoration has certain practical significance for vegetation restoration and soil and water conservation in the region. Using the “spatial-temporal intergenerational approachâ€, the recovery stages of different vegetations were studied in Guizhou Province. The fractal dimension of soil particles, aggregates and microaggregates at each recovery stage was calculated, and the fractal dimension of the soil during vegetation restoration was preliminarily explored. The main factors affecting the fractal dimension of the soil are analyzed, and the theoretical basis for the reconstruction of degraded ecosystems and soil and water conservation is provided.
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