Fluks CO2 dari Andosol pada Penggunaan Lahan Kebun Teh dan Tanah Bera di Desa Tugu Utara Kecamatan Cisarua Kabupaten Bogor

Abstract

Global warming has became a critical environmental issue in the last years. This phenomenon is thought due to the increasing of greenhouse gases (GHG) concentration in the atmosphere. Carbon dioxide (CO2) is the major greenhouse gases generated by human activity that comes from the use fossil fuels for industrial activities, transportation, and household. Along with the increasing strength of is issue, agriculture is considered to be one of the sources of GHG emissions. There are already a lot of researches and publications regarding GHG emissions, particularly CO2 flux from agricultural land. There are a lot of informations on CO2 fluxes from peat land, but those from soil mineral is very limited. Therefore, a research needs to be done to measure flux of CO2 from mineral soil, especially that has high organic matter as in Andosol. The purposes of this study are to measure and compare CO2 flux of Andosol used for tea plantation and bare land, and to compare CO2 flux from mineral soils and peat soils. The method used for gas sampling is the closed chamber method and Infra- Red Gas Analyzer (IRGA) was used to measured CO2 concentration. The results showed that CO2 flux in the land used two lands on Andosol is about of 1.00 to 8.00 g C-CO2 m-2 day-1. Daily mean of CO2 fluxes were obtained from 25 weeks are 2.01 g C-CO2 m-2 day-1 (bare land) and 2.81 g C-CO2 m-2 day-1 (tea plantation). Mean daily CO2 flux of tea plantation was a higher than that of CO2 flux from bare land. These results are resembled by the data of microbial populations in the soil of tea plantation that was higher than that of the bare land. That facts indicate that the amount of CO2 flux are more originated from respiration activity that depend on the plant condition and the microbe activity. Andosol’s, Latosol’s and Peat soil’s CO2 fluxes in bare condition are almost the same. It shows that the CO2 flux from soil is not directly proportional to the content of soil organic matter.