The effectiveness of methanotrophic bacteria and Ochrobactrum anthropi to reduce CH4 and N2O emissions and to promote paddy growth in lowland paddy fields
- Author:
Dalia Sukmawati
;
Iman Rusmana
;
Nisa Rachmania Mubarik
- Publication Type:Journal Article
- Keywords:
Methanotrophs;
Ochrobactrum anthropic;
CH4 emission;
N2O emission;
paddy field
- MeSH:
Ochrobactrum anthropi
- From:Malaysian Journal of Microbiology
2016;12(1):50-55
- CountryMalaysia
- Language:English
-
Abstract:
Aims: Paddy field is one of the sources of greenhouse gasses such as methane (CH4) and nitrous oxide (N2O), which
causes global warming and other negative effects in agricultural sector. An alternative to optimize paddy productivity and
reduce emissions of CH4 and N2O is by using methanotrophic bacteria and Ochrobactrum anthropi BL2.
Methodology and results: This study consisted of two parts, i.e. positive control and experimental treatments. Positive
control consisted of 250 kg/ha NPK inorganic fertilizer NPK (15:15:15) (100% of the recommended normal dose) without
any methanotrophic bacteria. Meanwhile the experimental treatment consisted of 50 kg/ha inorganic fertilizers NPK
(20% of the recommended normal dose) with methanotrophic bacteria (Methylocystis rosea BGM 1, M. parvus BGM 3,
Methylococcus capculatus BGM 9, Methylobacter sp. SKM 14) and N2O reducing bacteria (Ochrobactrum anthropi BL2).
Using weight indicator of 1000 grams, all the bacteria are capable of increasing paddy productivity by 42.07%, compared
to conventional method which can only increase the productivity by 2.51% (Cepy and Wangiyana, 2011). The increasing
productivity and growth of paddy plants were due to the nitrogen fixation activity of M. rosea BGM 1, M. capculatus BGM
9, and Methylobacter sp. SKM 14. In the experimental treatment using bacteria, the emission of CH4 and N2O was
reduced with the highest CH4 and N2O sinks of 24018.8 mol CH4/day/ha and 68.48 mol N2O/day/ha, respectively.
However, the positive control treatment with 100% of the recommended fertilizer dose showed the highest CH4 and N2O
emissions which were up to 74346.45 mol CH4/day/ha and 26.21 mol N2O/day/ha, respectively.
Conclusion, significance and impact study: All the methanotropic bacteria and O. anthropi BL2 are significantly
increase paddy production, compared to positive control treatment. The addition of bacteria in paddy fields results in CH4
and N2O sinks.
- Full text:P020160317467803710516.pdf
