The Impact of Sewage-Sludge- and Olive-Mill-Waste-Derived Biochar Amendments to Tomato Cultivation

This study elucidated the impact of sewage-sludge (SS) and olive-mill-waste (OMW) biochar amendments to soil using tomatoes as a test crop. Four treatments were evaluated: “control” with no amendment, two SS addition 10 t/ha 25 t/ha, respectively, an OMW treatment t/ha. Higher yields observed in both treatments, providing evidence that acts plant bio-stimulant. Biochar application had positive impacts on carbon sequestration structure. The uptake heavy metals by all parts was very low, indicating is appropriate product for land application. dose type induced changes composition due different unique species biodiversity microbial communities. Venn diagrams revealed majority identified taxa shared among only small proportion them bulk between treatments. In rhizosphere, OMW-biochar-treated plants showed higher number taxa. Microbiota structure plays major role stimulation growth; however, further research needed understand these shifts functioning agroecosystems.