Effects of sewage sludge hydrochar on emissions of the climate-relevant trace gases NO and CO from loamy sand soil.

This work explores the effects of amending a loamy sand soil with hydrochars having different physicochemcial characteristics. The effects of different hydrochars on emissions of the greenhouse gases nitrous oxide (NO) and carbon dioxide (CO) were investigated together with the relationship between the hydrochar's mineral nitrogen content and the soil microbial biomass. Soil samples were amended with eleven different hydrochars and feedstocks having different carbon and nitrogen contents at application rates of 5 t ha and 25 t ha.