Chemical characteristics of secondary forest and mixed garden soils on inceptisols with the addition of rice husk biochar

• Main Authors: Herviyanti, Herviyanti, Prasetyo, Teguh Budi, Harianti, Mimien, Maulana, Amsar, Lita, Arestha Leo, Ryswaldi, Ridho
• Format: Conference Proceeding
• Language: English
• Subjects: Deforestation; Equivalence; Rice; Soil chemistry; Soil contamination; Soil fertility
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0127756

This study aims to determine the effect of rice husk (RH) biochar on the chemical characteristics of Inceptisols developed on two different land uses, namely secondary forest and mixed gardens (land contaminated with pesticides) which was carried out from April to June 2021 in the Chemistry and Soil Fertility Laboratory, Soil Department, Faculty of Agriculture, Andalas University, Padang. Soil samples were taken from Nagari Sariak, Sungai Pua District, Agam Regency. This study used a completely randomized design (CRD) with 5 treatments and 3 replications. The treatment was a dose of RH biochar consisting of 5 doses, namely: B1=0% (control); B2=0.5% (2.5 g/500 g soil) equivalent to 10 tons ha−1; B3=1% (5 g/500 g soil) equivalent to 20 tons ha−1; B4=1.5% (7.5 g/500 g soil) equivalent to 30 tons ha-1 and B5=2% (10 g/500 g soil) equivalent to 40 tons ha-1. From the research, it was concluded that the addition of RH biochar of 40 tons ha−1 was the best dose in improving the chemical characteristics of Inceptisol soils where the pH increased 0.93 and 0.70 unit; EC 0.05 and 0.04 ds/m; organic-C 1.75 and 1.25 %; P-available 10.89 and 23.79 ppm; Total-N 0.19 and 0.26 % and CEC 34.81 and 18.64 cmol kg−1; each for secondary forest and mixed garden.