The dynamics of nitrous oxide and methane emissions from various types of dairy manure at smallholder dairy farms as affected by storage periods

•Understanding the dynamics of N2O and CH4 fluxes avoids emissions during storage.•Manure discharge release significant N2O and CH4 emissions due to feed inefficiency.•Shortening manure storage is the most viable management at smallholder dairy farms.•Trade-offs between reducing CH4 or N2O fluxes of...

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Veröffentlicht in:Waste management (Elmsford) 2024-06, Vol.183, p.10-20
Hauptverfasser: Al Zahra, Windi, Ikhsan Shiddieqy, Mohammad, Anisa, Rahma, Yani, Ahmad, Priyo Purwanto, Bagus
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Sprache:eng
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Zusammenfassung:•Understanding the dynamics of N2O and CH4 fluxes avoids emissions during storage.•Manure discharge release significant N2O and CH4 emissions due to feed inefficiency.•Shortening manure storage is the most viable management at smallholder dairy farms.•Trade-offs between reducing CH4 or N2O fluxes often appears in manure management. Storing manure emits greenhouse gas (GHG) emissions, including nitrous oxide (N2O) and methane (CH4). However, the emissions from types of manure stored at smallholder dairy farms remains unknown. Hence, the study aims to analyse the dynamics of N2O and CH4 from different types of dairy manure as affected by storage periods. We collected samples from fresh manure (FM-DF1), manure from communal ponds in an urban dairy farm (IP-DF1, FP-DF1, MS-DF1), fresh manure from an urban dairy farm (FM-DF2), and fresh (FM-DF3), separated (FS-DF3), and fermented manure (FR-DF3) from a peri-urban dairy farm, and stored them for eight weeks and analyse them using the closed chamber method. The changes of manure composition including total solids (TS), nitrogen (N), ammonia–nitrogen (N-NH3), and carbon (C) were analysed. Results indicated an increase TS in all treatments except for MS-DF1, while N, N-NH3, and C content decreased in all treatments. The N2O emissions formed at the start, peaked in the middle, and declined towards the end storage period. The CH4 emissions peaked at the start and decreased until the end storage period. Treatment FM-DF2 yield highest cumulative of N2O (0.82 g/m2) and CH4 (41.63 g/m2) compared to other fresh manure treatment. A mixed model analysis detected a significant interaction (p 
ISSN:0956-053X
1879-2456
1879-2456
DOI:10.1016/j.wasman.2024.04.039