Effects of Different Land Use Patterns on Soil Organic Matter and Soil Cycle Process

Abstract

Soil organic matter is not only the condition for the survival and development of soil organisms, but also the product of the survival and development of soil organisms. Land use pattern is an important factor affecting the content and dynamic change of soil organic matter. There are significant differences in the spatial and temporal distribution and circulation of matter under different land use patterns, which interfere and adjust the cycle process of soil biochemistry, and the content of soil organic matter also changes. In this paper, the soils under four land use types, i.e., grassland, woodland, cultivated land and unused land, in the surrounding area of Yanshan Campus of Guilin University of Technology were selected as the research objects, and five samples of 10-20cm topsoil under different land use types were collected by diagonal method. The soil organic matter content was measured by hydration heat K2Cr2O7oxidation-colorimetry, and the differences and laws of soil organic matter content under different land use types were discussed. The results showed that soil organic matter content was closely related to land use patterns, and there were differences in organic matter content among different land use patterns, which was supported by F test of land use patterns. According to the average value of sample organic matter, the organic matter content of red soil under different land use patterns is cultivated land (3.89%) > unused land (3.02%) > grassland (1.25%) > forest land (1.12%). However, under the condition of α=0.01, there is no significant difference between woodland and grassland, while there is significant difference between woodland and cultivated land and unused land, while there is no significant difference between grassland and cultivated land and unused land.