What is mechanism involved when mixed Biochar and Urea?
How its absorbed by Nitrogen by Biochar and slow release of N.
Pls clarify my doughts
The use of biochar based N fertilizers has been considered among the most effective strategy for reducing nitrogen loss and improving nitrogen use efficiency (NUE). And slow release of nitrogen.BCU is manufactured by coating biochar outside urea with a coating machine. Te percent of biochar in BCU is about 22.56%.
The reduction of nitrogen loss and improvement of NUE could be attributed to the porosity, large specific surface area, surface charges, variety of surface functional groups and a small amount of active carbon present in Biochar. These properties of biochar could increase soil water holding capacity, adsorb inorganic nitrogen, influence nitrification and denitrification of nitrogen in soil, increase microbial biomass, and change soil structure of bacterial community .
Biochar used for BCU can be prepared based on pyrolysis of vinasse in a fixed-bed heating furnace. The pyrolysis temperature was 600 °C and the pyrolysis time is about 90 min. The pH, specific surface area, ash content, C content, H content, N content, O content, O/C molar ratio, and H/C molar ratio of biochar are 8.88, 172.48 g/m2, 29.89%, 61.32%, 1.62%, 2.79%, 1.66%, 0.02, 0.32, respectively.
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