▎ 摘　　要

NOVELTY - Pseudoalteromonas sp. A4-2 is preserved in the China Center for Type Culture Collection on January 20, 2021 under biological preservation number (CCTCCNO: M2021119). USE - Pseudoalteromonas sp. A4-2 in agricultural production field, where the application comprises but not limited to for preparing soil repairing product, biologicalfertilizer, the application mode comprisesproviding a salt washing method of saline-alkali soil,the method comprises the strain, microbial inoculum and/or soil modifying agent is applied to saline-alkalisoil for 4-8 days, irrigating fresh water for washing salt (all claimed). ADVANTAGE - Pseudoalteromonas sp. A4-2 has simple preparation process,environment-friendly and harmless and high productefficiency, has important application in the field ofsaline-alkali soil treatment and sewage treatment. DETAILED DESCRIPTION - Pseudoalteromonas sp. A4-2 is preserved in the China Center for Type Culture Collection on January 20, 2021 under biological preservation number (CCTCCNO: M2021119). INDEPENDENT CLAIMS are included for the following: (1) a soil modifying agent, which comprises an inoculating strain of the immobilized carrier, the strain is Pseudoalteromonas (Pseudoalteromonas sp.) A4-2, the immobilized carrier comprises corn strawand/or wheat straw; and (2) a biological reducing graphene aerogel, which comprises Pseudoalteromonas (Pseudoalteromonas sp.) A4-2.