Plant Soil Environ., 2015, 61(8):344-351 | DOI: 10.17221/21/2015-PSE
Soil, slurry and application effects on greenhouse gas emissionsOriginal Paper
- 1 Department of Animal Sciences, Faculty of Agricultural Science, Georg-August- University of Göttingen, Göttingen, Germany
- 2 Johann Heinrich von Thünen Institute, Institute of Climate-Smart Agriculture,
In conjunction with soil type and climate, the use of nitrogen fertilizers is a major factor affecting nitrous oxide emissions. This study compares injection of pig slurry and pig slurry digestate at 15 or 20 cm depths with trailing-hose application followed by immediate incorporation. The work was based on a laboratory microcosm experiment with undisturbed soil cylinders (0-30 cm depth) from three arable soils (Histosol, Gleysol and Plaggic Anthrosol). Soil cylinders were fertilized with pig slurry and pig slurry digestate (150 kg N/ha) and emissions of N2O, CH4 and CO2 were monitored. The comparison of application techniques over a 37-day period show that soil type and application technique, had a strong (P < 0.001) impact on N2O emissions. Fertilization with pig slurry showed no significantly higher N2O emissions than pig slurry digestate. Fertilizer injection significantly increased N2O emissions compared to fertilization with a trailing-hose with incorporation.
Keywords: organic fertilization; manure; injection technique
Published: August 31, 2015 Show citation
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