Compost can realize the recycling of organic waste. However, it also emits NH3 and greenhouse gases (GHGs) to the environment, which leads to nitrogen loss and global warming. Adding additives to compost can alleviate the emission of NH3 and GHGs. The mechanism of nitrogen transformation and GHGs emission was studied with deer manure and corn straw as compost substrate, and biochar and zeolite as additives. The results showed that the addition of zeolite in compost is good for prolonging high-temperature composting time. The addition of zeolite reduced the transformation of NH3-N and the N2O emission. The addition of zeolite is beneficial to reduce nitrogen loss during composting. CH4 emission is an important factor affecting the global warming potential of composting, and it is necessary to improve ventilation conditions in order to alleviate anaerobic. This study is of great significance to reduce nitrogen loss and improve composting effect.
Keywords: Biochar; Deer manure; Greenhouse gases; Nitrogen transformation; Straw; Zeolite.