Effect of the addition of various exogenous substances on the physico-chemical properties of the aerobic composting of livestock manure

The utilization of aerobic composting to produce organic fertilizer represents a significant method of resource utilization of livestock and poultry manure. In this study, two substances were selected for analysis. The study included two substances: tillage soil and corn bracts and corncobs. Each substance was co-composted with livestock manure at a ratio of 5% and 15%, respectively. The results demonstrated that the temperature ranking for each treatment group was as follows: corn bracts, corncobs 15% > corn Bracts, corncobs 5% > control group > tillage soil 15% > tillage soil 5%. The maximum temperature of the treatment group with 15% corn bracts and corncobs reached 60.2?C, which was higher than the 37.2?C of the tillage soil group and the 46.7?C of the control group. The corn bracts and corncobs 15% group was maintained at a temperature above 50?C for a period of 19 days, with a final carbon-to-nitrogen ratio of 16:9. The pH fluctuation of the corn bracts and corncobs treatment group was significant, and the moisture content decreased relatively slowly, indicating a vigorous microbial response and a strong water retention capacity. The difference in electrical conductivity between the treatments was not statistically significant, and there was no evidence of toxicity to plants at the end of the composting process. Pearson correlation analysis revealed a strong correlation between the difference in compost temperature and the addition of exogenous additives.