Perbandingan Efektivitas Biochar Dari Serbuk Kayu dan Ampas Sagu Dalam Penyerapan Emisi CO2 Dalam Tanah

Abstract

The increase in CO₂ gas occurs because more gas is produced than it absorbs. This results in the accumulation of CO₂ gas in the atmosphere and causes global warming. Biochar has a stable aromatic ring structure and is porous, so it can absorb and store soil carbon for a long period of time as soil amendment while also regenerating soil. Wood sawdust biochar (B1) and sagu pulp (B2) are pyrolyzed at 600 and 400 ^oC respectively for one and two hours. The CO₂ emission absorption process is carried out by incubating soil that has been mixed with biochar for 20 days. The results of the characterization test (moisture content and surface area) of both types of biochar show that B1 has a greater moisture content and surface area than B2. In the soil quality test, it was found that TB1 (soil + wood sawdust biochar) decreased C-organic (C-organic = 0.04%; control = 0.043%) and increased soil NPK, while TB2 (soil + sagu pulp biochar) increased C-organic and soil NPK. The results of the soil incubation test showed that the CO₂ flux increased in TB1 until the 5th day and decreased on the 10th day until the last day of incubation, while for TB2 CO₂ emissions continued to increase. The results of the pH test during incubation did not experience significant growth. Based on the results of this test, it can be concluded that Wood Sawdust is more effective in absorbing CO₂ emissions, while sago pulp is more effective in regenerating soil.