1. College of Resources and Environment，Jilin Agricultural University，Changchun 130118，China；
2. Shulan City Rural Economic Management Station，Shulan 132600，China；3. Agro-Environmental
Protection Institute，Ministry of Agriculture and Rural Affairs，Tianjin 300191，China
Abstract：To study the effects of adding time and proportion of ethyl sulfide nitrogen on physico‐
chemical properties and Cu and Zn activities of chicken manure before and after composting, com‐
posting experiments were carried out using chicken manure and corn stalk as raw materials, and
ethyl sulfide nitrogen as additive. The changes in heavy metal activity before and after composting
were analyzed by an improved BCR continuous extraction method. The results showed that the high‐
est temperature of the compost in each treatment group of ethyl sulfide nitrogen exceeded 60 ℃, all
lasting for more than 3 days; The composting temperature showed a trend of rising sharply in the ini‐tial stage and then falling slowly. During the composting process, pH value first increased, then de‐
creased slightly, and finally stabilized. At the end of the composting process, pH value was basically
between 8-9, and C/N ratio of each compost was in the range of 16-17. Different addition time and
ratios of ethyl sulfide nitrogen had no significant effect on physical and chemical properties of the
compost. At the same addition ratio, the passivation effect of adding ethyl sulfide nitrogen on heavy
metals Cu and Zn on the 21st day of composting was better than that of adding ethyl sulfide nitrogen
at other time. Compared with the ck, the passivation ability of heavy metal Cu in the T1~T8 groups
with the addition of ethyl sulfide nitrogen increased by 3.03%-24.17% and the passivation ability of
heavy metal Zn increased by 2.36%-15.21%. Adding 0.20% (the amount of dry matter in the com‐
post) of ethyl sulfide nitrogen on the 21st day of composting was more beneficial to improving the pas‐
sivation effect of chicken manure compost on Cu and Zn.
