A soil improvement material and its preparation method and application

Abstract

The present invention relates to the technical field of soil improvement, and discloses a soil improvement material, a preparation method thereof, and an application thereof. The soil improvement material comprises a ferrous phosphate mineral doped and modified with metal ions; the metal ions are selected from Mn 2+ Mg 2+ 、Ni 2+ , Ca 2+ 、Al 3+ At least one of the following. The soil improvement material provided by the present invention has the properties of slow-release phosphorus and soil organic carbon sequestration under both anaerobic and aerobic conditions. It can be used as a slow-release fertilizer in the soil to provide the phosphorus required for crop growth, and can also serve as a carbon sequestration material to enhance soil carbon sinks. The slow-release property of phosphorus in the material can extend the fertilizer effect period and improve the phosphorus utilization rate of crops. At the same time, trace elements such as manganese and magnesium in the material can also be slowly released and absorbed and utilized by crops, thereby improving the yield and quality of crops. While achieving slow-release phosphorus in both anaerobic and aerobic stages, it ensures the efficient, stable and long-term sequestration of soil organic carbon.

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