Fungal N_2O production in an arable peat soil in Central Kalimantan, Indonesia(Environment)

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概要

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• To clarify the microbiological factors that explain high N_2O emission in an arable peat soil in Central Kalimantan, Indonesia, a substrate-induced respiration-inhibition experiment was conducted for N_2O production. The N_2O emission rate decreased by 31% with the addition of streptomycin, whereas it decreased by 81% with the addition of cycloheximide, compared with a non-antibiotic-added control. This result revealed a greater contribution of the fungal community than bacterial community to the production of N_2O in the soil. The population density of fungi in the soil, determined using the dilution plate method, was 5.5log c.f.u. g^<-1> soil and 4.9log c.f.u. g^<-1> soil in the non-selective medium (rose bengal) and the selective medium for Fusarium, respectively. The N_2O-producing potential was randomly examined in each of these isolates by inoculation onto Czapek agar medium (pH 4.3) and incubation at 28℃ for 14 days. Significant N_2O-producing potential was found in six out of 19 strains and in five out of seven strains isolated from the non-selective and selective media, respectively. Twenty-three out of 26 strains produced more than 20% CO_2 during the 14-day incubation period, suggesting the presence of facultative fungi in the soil. These strains were identified to be Fusarium oxysporum and Neocosmospora vasinfecta based on the sequence of 18S rDNA, irrespective of the N_2O-producing potential and the growth potential in conditions of low O_2 concentration.

• 社団法人日本土壌肥料学会の論文

著者

• LIMIN Suwido

  Faculty of Agriculture, University of Palangka Raya

• DOHONG Salampak

  パランカラヤ大農

• Darung Untung

  UNPAR

• Dohong Salampak

  Faculty Of Agriculture University Of Palangka Raya

• Takakai Fumiaki

  北大院農

• Hatano Ryusuke

  北大院農

• Limin Suwido

  Fac. Of Agriculture Palangkaraya Univ.

• Hatano Ryusuke

  Soil Science Laboratory Graduate School Of Agriculture Hokkaido University

• HATANO Ryusuke

  Research Faculty of Agriculture, Hokkaido University

• Hatano Ryusuke

  Research Faculty Of Agriculture Hokkaido University

• Darung Untung

  Faculty Of Agriculture The University Of Palangkaraya

• Takakai Fumiaki

  Akita Prefectural Univ. Akita

• MORISHITA Tomoaki

  Forestry and Forest Products Research Institute

• Morishita Tomoaki

  Inst. Biological Problems Of Cryolithzone Russian Acad. Sci. Yakutsk Rus

• YANAI Yosuke

  Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology

• TOYOTA Koki

  Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology

• TAKAKAI Fumiaki

  Research Faculty of Agriculture, Hokkaido University

• Yanai Yosuke

  Institute Of Symbiotic Science And Technology Tokyo University Of Agriculture And Technology

• Limin Suwido

  Faculty Of Agriculture Palangka Raya University

• Darung Untung

  Faculty Of Agriculture Palangka Raya University

• Toyota Koki

  Tokyo Univ. Agriculture And Technol. Tokyo Jpn

• Toyota Koki

  Institute Of Symbiotic Science And Technology Tokyo University Of Agriculture And Technology

• Hatano Ryusuke

  北大 大学院

• Mizoguchi Takeo

  Forestry And Forest Products Res. Inst. Kyoto Jpn

• Morishita Tomoaki

  Forest Ecosystem Dynamics Group Shikoku Research Center Forestry And Forest Products Research Institute (ffpri)

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