Accumulation rate of tropical peat soils under different types of forest

Faustina E. Sangok, Yuki Sugiura, Nagamitsu Maie, Lulie Melling, and Akira Watanabe

Proceedings of the 15th International Peat Congress


accumulation, tropical-peat, vegetation




In recent years, conversion of peatland to oil palm plantation has increased in Malaysia due to the higher demand on palm oil. Although it is considered that the land use change from primary forest to agricultural land accelerates the rate of peat decomposition, the strength of impact may vary among the different types of forests. The difference in the rate of peat accumulation may also be related to the decomposability of peat. The objective of the present study is to compare the rate of peat accumulation among the representative types of forests in the Maludam National Park, Sarawak, Malaysia. Soil samples were collected from three forests of Mixed Peat Swamp (MPS), Alan Batu (ABt), and Alan Bunga (ABg), which are located at the edge, middle, and centre parts of peatland in the dome shape. 14C age, infrared and 13C nuclear magnetic resonance spectra, and physicochemical properties were analysed for 5?6samples from each soil profile, between 100?450 cm depth (MPS), 200?700 cm depth (ABt), and 200?800 cm depth…