A Biochar-based Fertilizer Synergist and a Preparation Method

Abstract The present invention discloses a biochar-based fertilizer synergist with low cost, high efficiency and wide application. It uses granular biochar, which is prepared from corn cob, peanut hull, rice husk, edible fungi substrate and other agricultural and forestry waste biomass, as the matrix material. At the same time, it comprises a urease inhibitor, a nitrification inhibitor, humic acid and trace elements. This synergist can be applied alone or in combination with other fertilizers at a ratio of 1-5 : 100. The biochar is produced by incomplete combustion of biomass under low oxygen N conditions. It has a variety of properties similar to those of soil humus (acid); the N ability to absorb and retain nitrogen, phosphorus, potassium and other nutrients is strong; and the effect of water and soil retention is remarkable. The fertilizer synergist prepared by this method has the characteristics of soil structure improvement, water and fertilizer retention, temperature increase, high efficiency and environmental protection. Therefore, it has broad application prospects.