Effect of flooding duration on nitrous oxide emission from organic and conventional rice cultivation system in Central Java, Indonesia

Abstract

Majority paddy fields in Indonesia are cultivated under conventional management practices. Recently, organic farming has been developed due to a high demand of more healthy food and soil fertility improvement of farmer field. A greenhouse experiment was conducted to investigate N2O emission from organic (O) and conventional rice field (K) collected from Sragen (S, soils with clay texture) and Magelang (M, soils with coarse texture) region. The soils were treated with different duration of flooding, i.e., no flooding (P0), flooding 2 weeks (P2), and flooding 4 weeks (P4). The result showed that there were no significant differences on N2O emission among the treatments in this study. However, N2O emission (kg N ha−1) was emitted more significant in organic than in conventional management practice in both regions. N2O emission (kg N ha−1) showed the highest value (0.39 – 1.21) when soil was flooded during 2 weeks. Interestingly, N2O emissions from both regions showed the same trend, neglected their different soil texture.