CD Skripsi
Dampak Paska Abrasi Terhadap Aktivitas Dan Fungsi Komunitas Mikroba Tanah Gambut Di Pesisir Pulau Bengkalis
Bengkalis district is one of the area dominated by peatlands. Most of peatland areas are found along the coast and influenced by tides and low tides. Bengkalis district is an area that is prone to abrasion because it is directly adjacent to the Malacca Strait, one of which is peat on Sesai Panjang Beach, Simpang Ayam Village. This research aimed to analyze the impact of post-abrasion of peat soil on the coast of Bengkalis Island on the physicochemical character of the soil, the rate of FDA hydrolysis and microbial community function. Soil samples were taken from shrubs (SM), peat boulder (BK), peatball (BG) and sesai (SS). Soil physicochemical characters were observed including pH, temperature, salinity, soil volume, soil water content, organik carbon (C) content, total nitrogen, C/N ratio, available phosphorus, exchangeable K and Mg content of soil ranged from 4,63-5,40; 28,86°C-32,10°C; 0,06-13,20; 0,08-0,14 gr/cm3; 362-733 %; 53,00-57,00 %; 0,69-1,01 %; 56,75-82,45 %; 47,95-177,3 ppm; 0,48-4,05 cmol/kg dan 9,88-84,7 cmol/kg. FDA hydrolysis activity ranged from 112,35-245,63 μg fluorescein/g soil dry weight /hour. The highest activity of the microbial community in carbon source degradation was found in sesai. Overall microbial activity in substrate degradation in each sample tends to fluctuate. The bacterial cells number ranged from 2,1-14,1 x105 CFU/g soil. The fungi cells number ranged from 0,4-6,6 x104 CFU/g soil. The microbial cells number in locations that have not been affected by abrasion is higher than that of post-abrasion areas. Based on the result, it can be concluded that abrasion affects physicochemistry of the soil, the rate of FDA hydrolysis and microbial community function and microbial population.
Keywords: abrasion, FDA hydrolysis, microbial community function, microbial population, peat
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