Evaluation of Zeolite as a Binding Agent to Mitigate Ammonia Loss from Pig Slurry and Manure
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چکیده
Nitrogen (N) in livestock food sources that does not end up in a product (e.g. milk or eggs) or that does not get incorporated in body tissue is excreted by the animal. Nitrogen in the urine is in the form of urea which can rapidly hydrolyse to form ammonium carbonate. The decomposition of ammonium carbonate frees up ammonium ions that can volatilise as gaseous ammonia (NH3). Hydrolysis of urea is facilitated by the enzyme urease, which is abundant in soils and plant roots as well as in animal faeces. However N excreted in animal faeces is typically bound up in organic compounds which need to be mineralized to the ammonium form before NH3 volatilisation can occur (Ndegwa et al., 2008).
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