Carbon dioxide (CO2) emissions on highland peatland that has been planted with coffee in Humbang Hasundutan Regency, North Sumatra Province

Abstract

Peatlands in Indonesia are estimated at 26 millions ha. These peatlands are spread across Sumatra on of 8.9 million ha areas. Humbang Hasundutan is one of the area that spread peatlands in North Sumatra with an estimated area of around 1,042 hectares spread in Lintong Nihuta District, Pollung District and Dolok Sanggul District. Peat in this area is unique and rare because the general peat is founded in lowlands adjacent to the coast, but peat in Humbang Hasundutan area is a highland (topogenous) peat which lies at altitude 1000-1450 meters above sea level. The purpose of this study was to determined the amount of CO2 emissions on peatlands cultivated with coffee in Dolok Sanggul District, Humbang Hasundutan Regency. This study was conducted in Huta Bagasan Village, Dolok Sanggul District, Humbang Hasundutan Regency. This research method is a survey research of the amount of CO2 emissions on highland peatlands that are cultivated with coffee. CO2 sampling using a closed hood method. The sampling point is determined 75 cm from the plant. The sampling was taken 3 times a day, namely at 07.00 WIB, 12.00 WIB and 17.00 WIB. Based on the research was known that the highest CO2 emissions were found during the day at 8.12 mg/m2/day, followed by the afternoon at 7.67 mg/m2/day, and the lowest in the morning at 4.21 mg/m2/day.