Abstract:
The effect of burnt on structure and component (calsium, magnesium, sulphate and total C/N) in peat swamp soil was investigated in the Pakning Asal of Bengkalis. The analysis were conducted on the burnt and unburnt soil in the last five years. The content of available calsium and magnesium were determined using complexometry titration method, sulphate content was determined by turbidimetry method and the C/N was by visible spectrophotometry method that for carbon, while for total of nitrogen was by titrimetric method. Based on the results, the fires could change the content of available calsium, magnesium, sulphate and total of C/N. The contain of calsium 0,27-0,30% in unburnt soil and increased to 0,34-0,42% in burnt soil. The magnesium content was 0,06-0,08% in burnt soil and increased to 0,11-0,15%. While to sulphate contain was decreased from 0,23-0,24% in unburnt soil to 0,10-0,11% in burnt soil. The C/N also increased from 16,67 on the unburnt soil to 25,31 in burnt soil.
