CD Tesis
Pemulihan Alami Biota Tanah Gambut Satu Setengah Tahun Setelah Terbakar Di Pt. Sumber Sawit Sejahtera Kabupaten Pelalawan
Peatlands are land resources that play an important role for human life. This is related to the very large role, function and benefits of peat in the ecosystem. In the last decades, peatlands have experienced frequent fires. This has an impact on soil biota damage. The aim of this study was to assess the differences on peat soil biota one and a half years after burning compared to non-burning in PT. SSS Pelalawan Regency. In addition, it was also assessing the recovery of damage to peat soil biota by comparing the population and diversity of macrofauna and mesofauna as well as total microbes, total fungi and respiration of microorganisms between one and a half years burnt peatlands and unburnt one in PT. SSS. The recovery assessment refers to Government Regulation No. 4 of 2001 on controlling environmental damage and pollution related to forest and land fires.
This research was conducted on a plantation owned by PT. Sumber Sawit Sejahtera (PT. SSS) in Kuala Panduk village, Teluk Meranti District, Pelalawan Regency and the Soil Laboratory of Agriculture Faculty, Riau University, Riau Province. Survey was used as research method and the location of the study was determined by using purposive sampling method (both burnt and unburnt working area of PT. SSS). Burnt area was approximately 60 Ha, where there were 6 observed points on burnt, as well as 6 points on unburnt one representing 10 Ha per observation point. Observation points were chosen by systematic method and applied for both land.
Soil sampling for macrofauna and mesofauna analysis was carried out using 50 cm x 50 cm x 15 cm sampling box immersed in the soil while using soil sampler for microorganism observation. Macrofauna was collected by hand-sorting method while mesofauna was collected by Barlesse tullgreen tool. After being collected, the identification process was carried out up to family level.
Parameters observed for macrofauna and mesofauna were number of families & individuals, population & relative density, and diversity index. Microorganisms amount were counted by the total of microorganisms. Supporting data measured were soil temperature, soil pH, and vegetation data. The data obtained to determine the diversity of macrofauna, mesofauna, and the total numbers of soil microbes were analyzed using 5% level of t-test.
The results showed that the observed parameters for the number of families & individuals, population density, and the diversity index of macrofauna and mesofauna between peatlands one and a half years after burning and not burning were not significantly different, as were the total respiration of fungi and microorganisms. The condition of growing vegetation and better micro-climatic conditions means that soil biota is no longer damaged (macrofauna, mesofauna, and microorganisms) or has recovered even though the total microbes have not fully recovered.
Keywords: Recovery, Damage, Biota, Peatland Fires
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