Variasi kadar karbon organik berdasarkan perbedaan kedalaman muka air pada lahan gambut yang diusahakan untuk komoditas perkebunan.
Variations of organic carbon content as related to the difference in water table levels of peatlands cultivated for plantation commodities.
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Date
2012Author
Frizdew, Rovanty
SABIHAM, SUPIANDI
SUDADI, UNTUNG
NUGROHO, BUDI
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Peatlands are important sinks for the atmospheric carbon (C) and play major roles in the global C cycle. In virgin forest, C sink and emission is balanced. During land reclamation, this balance is disturbed by drainage channel construction which affects water table level and other consequences. It is therefore important to study the effects of drainage channel construction on the distribution of soil C content and its dynamics. This research aimed at to evaluate: (1) the effects of distance to the drainage channel in water table level, (2) the effects of water table level on organic-C content, and (3) the relationships among organic-C content with the characteristics of peatland based on land use time for cultivation of plantation commodities. The research was conducted in Bengkalis District, Riau Province from January until June 2011. The characteristics of peatland observed were bulk density, ash content, peat thickness, and water table level. The results showed that the closer the distance from drainage channel, the deeper was the water table level. Two patterns of the relationship between water table level and organic-C content were observed. The first pattern at 50-100 cm layer was the increase in organic-C with the decrease in water table level up to water table level about -46.5 cm. The second at 0-50 cm layer was the opposite of first pattern up to water table level about -49 cm. Peatlands of the study area were characterized by organic-C content of 55.16-57.28%, bulk density of 0.04-0.11 g/cm3, ash content of 1.25-4.90%, water content of 492.54-1226.81%, and degree of peat maturity of fibric, hemic and sapric with fibre content of 11.67-35%. Generally, at 0-50 cm layer organic-C content was influenced significantly by ash content, with at 50- 100 cm layer was by ash content and water table level.
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- DT - Agriculture [732]