Biochar combined application organic-inorganic fertilizer and method for improving salinized soil by using biochar combined application organic-inorganic fertilizer

The invention relates to the technical field of organic and inorganic fertilizers, and particularly discloses a biochar combined organic and inorganic fertilizer and a method for improving salinized soil thereof.The biochar combined organic and inorganic fertilizer is prepared from, by weight, 45-55 parts of animal waste, 25-30 parts of plant ash, 15-20 parts of urea, 8-12 parts of calcium superphosphate, 4-8 parts of monopotassium phosphate, 1-2 parts of humic acid and 0.5-1 part of amino acid. Animal waste is adopted as an organic raw material, plant ash, urea, monopotassium phosphate, calcium superphosphate and other raw materials are matched, through blending of the raw materials, rich organic matter, potassium, nitrogen, calcium and other elements can be provided for salinized soil, meanwhile, amino acid is added, rich organic acid substances are provided for the product, the physical properties and biochemical characteristics of the soil are improved, and the soil quality is improved. Meanwhile, organic