Objective:The objective of this research was to evaluate the effect of biosolids in an area of recent deforestation.Theoretical framework: Biosolids correspond to a type of organic waste resulting from different treatment processes.Method:The evaluation was carried out in 6 plots, in different sites in the same area and evaluated the growth of species height and laboratory analysis of microbiological, physical-chemical and heavy metal parameters for the soil; this to be compared with national and international regulations that regulate the use of biosolids.Results and conclusion:The growth of tree species, nutrient supply and toxicity of some parameters such as heavy metals and pathogens were identified according to treatment; as a result, the best growth in total height was obtained in plot P3, which had application of the biosolid with 26 tree species of the 124 species sampled. As for...