PROCESS FOR MANUFACTURING SLOW-RELEASE SOIL IMPROVEMENT FERTILIZER FROM BIOCARCOAL

Abstract

The invention relates to a process for manufacturing slow-release soil conditioner fertilizer from biochar derived from rice husks, which includes the following steps: a) Material processing; b) Mixing rice husk raw materials with macro and microelements; c) Manufacturing modified biochar; d) Manufacturing slow-release soil conditioner fertilizer from modified biochar. The process according to the invention is capable of manufacturing a slow-release soil conditioner fertilizer with a yield of 500 kg of material / ton of dry rice husks. The composition of the slow-release fertilizer is determined to include rice husk: N : P : K : Ca = 75 : 10 : 7 : 7 : 1. The release capacity of the fertilizer in a pH = 6.5 environment indicates that 5-10% of N, P, and K have been released after 7 days, and after 60 days, the remaining N, P, and K content is > 40% of the initial content.