FLUKS CO2 DARI ANDISOL PADA PENGGUNAAN LAHAN KEBUN TEH DAN TANAH BERA DI DESA TUGU UTARA KECAMATAN CISARUA KABUPATEN BOGOR

Abstract

Global warming is due to the increasing of greenhouse gases (GHG) concentration in the atmosphere. There are a lot of informations on CO2 fluxes from peat land, but those from soil mineral is very limited. 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.

Keywords: Andosol, CO2 flux, greenhouse gas, tea plantation, mineral soil