Response characteristics of organic carbon storage in sandy soil to sandstone

Abstract

The soil structure and quality can be improved by the improvement of the sand by using the weathered material of the sandstone. In this study, four kinds of mixed soils with mixed sandstone and sand ratios of 0: 1 (CK), 1: 5 (C1), 1: 2 (C2), and 1: 1 (C3) were selected as research objects. The results showed that the soil organic carbon showed a difference only in the 10-20 cm soil layer. Compared with the CK treatment, the content of organic carbon in the sandstone treatment was significantly reduced by 30.06% -46.36%. The bulk density in each soil layer increases with the increase of the proportion of sandstone. There was no significant difference in soil organic carbon storage in each soil layer. The organic carbon storage in C1 treatment was 13.87% lower than that in CK treatment, and the organic carbon storage in C2 and C3 treatments increased by 4.40% and 3.22% respectively compared to CK treatment. Therefore, when the mixed ratio of sandstone and sand is 1: 2, the improvement effect on sandy soil is better.