EMISI METANA PADA LAHAN PADI SAWAH ORGANIK DI SRAGEN
| Main Authors: | , Mujiyo, , Prof. Dr. Ir. Bambang Hendro S., SU |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2013
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/126234/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=66441 |
Daftar Isi:
- Organic paddy system absolutely uses organic fertilizer which assessed can increase the methane (CH4) production. Azolla is organic fertilizer source and affects to reduce CH4 emission from paddy field. This research aimed to: (1) Know the differences of soil properties and CH4 production potential in organic paddy field, semi-organic and conventional, and to know the soil property which most influences CH4 emission potential, (2) Know the influence of cow manure, Azolla fertilizer (incorporated into the soil), Azolla inoculum (dual cropping with the rice plant) and its combination to the soil properties, the growth and yield of rice plant, and CH4 emission, and (3) Decide recommendation and the way to applicate cow manure and Azolla which can improve soil properties, increase rice yield, and reduce CH4 emission. This research was conducted into 3 steps: (1) Field characterization and analyzing of CH4 production potential in laboratory. Soil properties in organic paddy field were compared to semi-organic and conventional paddy field. CH4 production potential was determined by measuring CH4 by means of soil which incubated with puddle, (2) Greenhouse experiment for planting organic paddy using various treatments. Treatments using cow manure, Azolla fertilizer, Azolla inoculum, and its combination based on requirement of 120 kg N ha-1, and (3) Field experiment for planting paddy in organic field using some treatments as in greenhouse experiment. The result of the research showed that soil properties of organic paddy field were different from the soil of semi-organic and conventional. Soil in the organic paddy field had darker matrix color, and C-organic, humus mass concentration, microbial biomass C and N, and CH4 production potential were higher than the soil in semi-organic and conventional paddy field. Soil property which most influences CH4 emission was C-organic content. Cow manure and Azolla fertilizer increased the harvest dry grain (HDG) 14.77% and 9.24%, respectively, but did not significantly affect CH4 emission. Azolla inoculum reduced CH4 emission 52.91%, but did not significantly affect HDG. The application of cow manure 4 tons ha-1 + Azolla inoculum 2 tons ha-1, Azolla fertilizer 2.5 tons ha-1 + Azolla inoculum 2 tons ha-1, and cow manure 2.67 tons ha-1 + Azolla fertilizer 1.67 tons ha-1 + Azolla inoculum 1.33 tons ha-1 could increase HDG and reduce CH4 emission. The application of Azolla inoculum can be applied as a way to reduce greenhouse gas emission of CH4 in organic paddy cultivation.