Method for improving tobacco leaf planting soil by using magnetic biochar

The invention discloses a method for improving tobacco leaf planting soil by using magnetic biochar, which comprises the following steps: by using the magnetic biochar prepared by pyrolyzing a smoke cartridge containing an electromagnetic particle material as a raw material, directly adding the magnetic biochar into the tobacco leaf planting soil, or preparing a spherical or granular fertilizer, and applying the spherical or granular fertilizer into the soil together with other fertilizers. And the fertility of the soil and the structure of the soil can be improved by irrigating water containing the magnetic biochar. The magnetic biochar has certain magnetic capacity, also has high porosity and specific surface area, can adsorb and store moisture and nutrients in soil, improves soil fertility, and is helpful for inhibiting occurrence of soil diseases, and the method can effectively improve the quality of the tobacco planting soil, improve the yield and quality of tobacco, and is suitable for popularization an