Influence of main factors on grass litter decomposition

Litter decomposition is ecosystem material circulation and the main part of energy flow. The protection of soil and water has an irreplaceable role of litter decomposition. This paper analyzes the impacts of nonbiological factors (precipitation, temperature), biological factors (animals, microbes, species) and objective factors on grass litter decomposition. The results showed that these factors could affect litter decomposition process directly and indirectly. The direct effects mainly changed the litter size and vegetation composition, thus changed the decomposition rate eventually. On the other hand, the indirect effects included changing the litter substrate C/N ratio and contents of litter lignin and nitrogen.