Carbon-based immobilized microbial agent soil conditioner and preparation method thereof

The invention discloses a carbon-based immobilized microbial agent soil conditioner and a preparation method thereof, and relates to the soil conditioner and the preparation method thereof. The invention aims to solve the problem that a soil repairing effect is poor because a current soil amelioration microbial agent is easy to inactivate. The soil conditioner includes straw-based biochar, sodiumalginate, bentonite, chitosan, calcium chloride, and bacillus subtilis. The method comprises the following steps: 1, crushing the bentonite, performing sieving to form bentonite powder, and mixing thesodium alginate, the bentonite powder, the chitosan and the calcium chloride to prepare an auxiliary material; and 2, adding the straw-based biochar and a bacillus subtilis fermentation liquid into the auxiliary material, and adding water to obtain the soil conditioner. The soil conditioner disclosed by the invention overcomes defects that a traditional microbial agent has small quantity, low activity and poor stability a