| Penulis/Author |
Prof. Dr. Ir. Benito Heru Purwanto, M.P., M.Agr. (1) ; NUKHAK NUFITA SARI (2); Prof. Dr. Ir. Sri Nuryani Hidayah Utami, M.P., M.Sc. (3); Dr. Ir. Eko Hanudin, M.P., IPU, ASEAN Eng (4); Prof. Dr. Ir. Bambang Hendro Sunarminto, S.U. (5) |
| Abstrak/Abstract |
Majority paddy fi elds in Indonesia are cultivated under conventional management
practices with addition of chemical fertilizer. Recently, organic farming has been
developed due to a high demand of more healthy food and soilfertility improvement
of farmers fi eld. in organic cultivation system, rice fi eld receives only organic
fertilizer such as straw and dairy manure.Under conventional management, rice
fi eld is a dominant GHG emitter,however, there is a lack information on the effect
of replacement of chemical fertilizer with organic fertilizer on GHG, especially
N2O. Central Java is one of the major rice producing areas in Indonesia but a few
studies have tried to characterize the mechanisms of GHG release from paddy
soil, especially nitrous oxide (N2O). Due to of that a greenhouse experiment was
conducted to investigate N2O emission derived from paddy soil taken from Sragen
(S) and Magelang (M) region. Flooding duration will affects N2O emission from
paddy soil.Thus, our experiment were combining the duration of fl ooding, i.e.,
no fl ooding (P0), fl ooding 2 weeks (P2), and fl ooding 4 weeks(P4), with different
land management, i.e., organic (O) and conventional (K) management practices.
There were no signifi cant difference on N2O emission among the treatments
in this study. However, N2O emission (kg N ha-1) was emitted more signifi cant
inconventional (-0.20 – 1.21)than in organic (-0.25 – 1.05) management practice
in both regions. N2O emission (kg N ha-1) showed the highest value (0.39 – 1.21)
when soil was fl ooded during 2 weeks. Interestingly, N2O emissions from both
regions showed the same trend, neglected their different soil texture |
