The improvement of paddy soil chemical properties following the application of rice husk derived biocharin the Regency of Sijunjung

Hermansah, Hermansah and Sandi, Nofrita and Naspendra, Zuldadan The improvement of paddy soil chemical properties following the application of rice husk derived biocharin the Regency of Sijunjung. IOP Conference Series: Earth and Environmental Science. ISSN doi:10.1088/issn.1755-1315 Online ISSN: 1755-1315 Print ISSN: 1755-1307

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Abstract

Abstract. The district of Dharmasraya, Sijunjung and Pasaman Barat are the three main locations of illegal gold mining in West Sumatra. This kind of activity triggers a lot of land-use changes and the loss of agricultural land within those areas and creates environmental problems as well. Decreasing agricultural land will bring a significant impact on food availability within the region. To protect the scarcity of food, we conducted remediation of ex-gold mining land on those three locations by using biochar made from rice husk. This study was carried on at Batu Manjulur village, Kupitan sub-district in Sijunjung for four months, where soil sample was analyzed at Soil Science Department, Faculty of Agriculture, Andalas University. The experiment use 6 level of biochar application, run from A [without biochar]; B [fulfil of 2% soil organic matter content [SOM]]; C [fulfil 3% SOM]; D [fulfil 4% SOM], E [fulfil 5% SOM] and F [fulfil 6% SOM] with three replication. The result shows the application of rice husk-derived biochar increased soil quality including the chemical properties of the soil and improving nutrient retention and land productivity. Keywords: ex-gold mining land, rice husk biochar, nutrient retention

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