A Summary of the Impact of Land Degradation on Soil Carbon Sequestration

Soil carbon pools have a great impact on global climate change, and land degradation caused by natural conditions or human activities is one of the important causes of soil carbon sequestration changes. In order to explore the impact of different types of land degradation on soil carbon sequestration and its mechanisms, this paper reviews the effects of different types of land degradation on soil carbon sequestration, such as desertification, soil erosion, soil salinization, nutrient loss and soil impoverishment. It is pointed out that various types of land degradation will increase the rate of CO2 release from soil to the atmosphere to varying degrees, which will increase the function of soil carbon source and weaken the function of carbon sink. However, the impact of land degradation on soil carbon stocks is likely to be reversed. In the future, the dynamic changes of soil carbon sequestration and deep soil carbon pools in different types of land degradation processes should be strengthened in order to further study the effects of soil carbon cycling in land degradation. And lay a foundation for enhancing the function of soil carbon sources.