The Study of Chicken Manure and Steel Slag Amelioration to Mitigate Greenhouse Gas Emission in Rice Cultivation

• Main Authors: Muhammad Iqbal Fauzan, Syaiful Anwar, Budi Nugroho, Hideto Ueno, Yo Toma
• Format: Article
• Language: English
• Published: MDPI AG 2021-07-01
• Series: Agriculture
• Subjects: methane; nitrous oxide; incubation experiment; pot experiment; rice paddy yield
• Online Access: https://www.mdpi.com/2077-0472/11/7/661

Organic matter, fertilizers, and soil amendments are essential for sustainable agricultural practices to guarantee soil productivity. However, these materials can increase the emission of greenhouse gases (GHGs) such as CH₄ and N₂O. Thus, technologies for reducing GHG emissions in concert with the increase in rice production from rice fields are needed. The objectives of this study were to determine the best chicken manure (CM) and steel slag (SS) combination to mitigate CH₄, N₂O, and CO₂ emissions in an incubation experiment, to identify the best CM:SS ameliorant mixture to mitigate CH₄ and N₂O, and to evaluate dry biomass and grain yield in a pot experiment. A randomized block design was established with four treatments, namely conventional (chemical fertilizer only) and three combinations of different ratios of CM and SS (1:1, 1:1.5, and 1:2.5), with five replications in a pot experiment. CM:SS (1:2.5) was identified as the best treatment for mitigating CH₄, N₂O, and CO₂ in the incubation experiment. However, CM:SS (1:1.5) was the best CM and SS ameliorant for mitigating CH₄ and N₂O in the pot experiment. The global warming potential of CH₄ and N₂O revealed that CM:SS (1:1.5) had the lowest value. None of the combinations of CM and SS significantly increased dry biomass and grain yield.