The ever-increasing human population associated with high rate of waste generation may pose serious threats to soil ecosystem. Nevertheless, conversion of agricultural and food wastes to biochar has been shown as a beneficial approach in sustainable soil management. However, our understanding on how integration of biochar obtained from different wastes and mineral fertilizers impact soil microbiological indicators is limited. Therefore, in the present study the effects of agricultural (AB) and food waste derived (FWB) biochars with and without mineral fertilizer (MF) on crop growth and soil health indicators were compared in a pot experiment. In particular, the impacts of applied amendments on soil microbiological health indicators those related to microbial extracellular (C, N and P acquiring) enzymes, soil basal as well as different substrate induced respirations along with crop's agronomic performance were explored. The results showed that compared to the control, the amendment with AB combined with MF enhanced the crop growth as revealed by higher above and below ground biomass accumulation. Moreover, both the biochars (FWB and AB) modified soil chemical properties (pH and electric conductivity) in the presence or absence of MF as compared to control. However, with the sole application of MF was most influential strategy to improve soil basal and arginin-induced respiration as well as most of the soil extracellular enzymes, those related to C, N and P cycling. Use of FWB resulted in enhanced urease activity. This suggested the role of MF and FWB in nutrient cycling and plant nutrition. Thus, integration of biochar and mineral fertilizers is recommended as an efficient and climate smart package for sustainable soil management and crop production.

AdMaS Research Centre Faculty of Civil Engineering Brno University of Technology Brno Czechia

Agricultural Research Ltd Troubsko Czechia

Agrovyzkum Rapotin Ltd Rapotin Czechia

Department of Agrochemistry Soil Science Microbiology and Plant Nutrition Faculty of AgriSciences Mendel University in Brno Brno Czechia

Institute for Environmental Studies Faculty of Science Charles University Prague Praha Czechia

Institute of Chemistry and Technology of Environmental Protection Faculty of Chemistry Brno University of Technology Brno Czechia

Institute of Soil and Environmental Science University of Agriculture Faisalabad Faisalabad Pakistan

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