Combination of Compost and Mineral Fertilizers as an Option for Enhancing Maize (Zea mays L.) Yields and Mitigating Greenhouse Gas Emissions from a Nitisol in Ethiopia

Combined application of organic and mineral fertilizers has been proposed as a measure for sustainable yield intensification mitigation greenhouse gas (GHG) emissions. However, fertilizer effects strongly depend on the soil type still no precise information is available Nitisols in Ethiopia. The study evaluated different ratios biowaste compost (consisting nitrogen (N), phosphorus (P), sulphur (S)) maize (Zea mays L. Bako-hybrid) yields two-year field trial. Soil samples from each treatment trial were used to estimate emissions nitrous oxide (N2O), carbon dioxide (CO2), methane (CH4), microbial activity 28-day incubation experiment with two moisture levels (40% 75% water-filled pore space, WFPS). corresponded N supply about 100 kg ha?1, whereby pure (100 min) was gradually replaced by compost. Maize increased 12 18% (p < 0.05) combined treatments compared min treatment. cumulative N2O CO2 but not CH4 affected 0.05). At WFPS, 16.3 g ha?1 more than twice high 100% (6.4 ha?1) also considerably higher 50% (9.4 ha?1). results suggest that accounting 40 70% combinations can be suitable increase well mitigate GHG Southwestern