Published On Oct 26, 2012 | Issue 1 | Volume 17 2011

POPULASI DAN AKTIVITAS DENITRIFIKASI SERTA EMISI GAS N2 O PADA LAHAN PERTANIAN ORGANIK PERTANIAN INTENSIF DAN HUTAN

Dwi Agustiyani
Bidang Mikrobiologi, Pusat Penelitian Biologi-LIPI Jl Raya Bogor-Jakarta Km 46 Cibinong 16911, Telp. 021-8765066, Fax. 8765062
Nur Laili
Hartati Imamuddin
Bidang Mikrobiologi, Pusat Penelitian Biologi-LIPI Jl Raya Bogor-Jakarta Km 46 Cibinong 16911, Telp. 021-8765066, Fax. 8765062
Nunik Sulistinah
Bidang Mikrobiologi, Pusat Penelitian Biologi-LIPI Jl Raya Bogor-Jakarta Km 46 Cibinong 16911, Telp. 021-8765066, Fax. 8765062
Abstract

This research investigate the population and potentials denitrification activity from three different soils, organically farmed soil,  intensive farmed soil and forest soil. Our objectives were to explore spatial gradients in denitrifier populations, examine whether  populations density and its potential activity was related to soil chemical properties (C and N content), and determine the potential  emission of gas N2O. Results indicated biological functional differences between these three different soil ecosystems. Forest soil had  the highest population density of denitrifying bacteria and also had significant potential denitrifying activities. The highest potentials  denitrifying activity in the soil affected to the lowest emission of N2O gas. The lowest population and potential denitrifying activity was  measured in the intensive farmed soil. Those conditions might be promoted the potentials emission of N2O.

Key words: denitrifiers, potential denitrification activity, potential emission of N2O

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