Nitrogen and sulphur transformations in composts containing chicken feathers

0
Chicken feathers composted with pine bark and rye straw are subject to intensive mineralisation and biotransformation with efflux of water-soluble components: N-NH4, N-NO3 and S-SO4. The content of N-NH4, N-NO3 and S-SO4 in water extracts of the studied composts was positively correlated with the time of composting. The release of those components reached a maximum after 15 weeks of composting feather wastes. The highest amounts of soluble forms of nitrogen and sulphur were recorded in composts enriched with straw, especially those with C/N=25, and the lowest in composts without straw, with C/N=25. It was also demonstrated that changes in the concentration of N-NH4 were correlated with increase in the concentration of N-NO3 and S-SO4 in water extracts of the composts. Increase in the content of N-NO3 and S-SO4 in extracts from the compost mass, with simultaneous decrease in the level of soluble N-NH4, may be used as a reliable indicator in the estimation of the maturity of composts containing waste feathers.

Customer comments

No comments were found for Nitrogen and sulphur transformations in composts containing chicken feathers. Be the first to comment!