According to the World Health Organization, the world population will reach 11.2 billion in 2100, an increase of 53 percent. To supply the food demand of these people, driving sustainable agriculture is the challenge for the century. The addition of biochar, a component that has a high capacity to retain nutrients and water, with fertilizers in the soil, can be a viable alternative to solve this challenge. The biochars used in this work were produced through pyrolysis, at three different temperatures. These biochars were characterized in order to evaluate their physical and chemical properties. These samples were used to produce six phosphate fertilizers based on biochar, using the commercial fertilizers MAP and Thermophosphate. These fertilizers were applied to the soil, previously characterized, to evaluate the amount of P available after pre-established times of its application. The experimental design used was randomized blocks, with three repetitions, using the same dosege of phosphorus, in addition to the control (without addition of fertilizer), in 7 different times, resulting in a total of 189 experiments. The results indicate that in relation to the available P content in the soil, the fertilizer with pyrolyzed biochar at 500 celsius degrees (BC500) and Thermophosphate (63,63 mg kg-1) and BC500 and MAP (146,59 mg kg-1) showed the best results compared to MAP and Thermophosphate commercial fertilizers. Therefore, the additions of biochar to fertilizers promoted a slow release of P over time, when compared to MAP and Thermophosphate commercial fertilizers. The kinetic study of P release showed that the model that best represents the process is the pseudo-second order, with a correlation coefficient of 0.99.