The characteristics and functions of dicyandiamide as a component in agricultural and livestock fertilizers.
Nov 29, 2023| 
The application of dicyandiamide (DCD) in agricultural ecosystems offers numerous advantages, particularly in addressing issues related to low nitrogen fertilizer utilization efficiency, economic losses, and environmental pollution. Here are key characteristics and functions:
1.Nitrification Inhibition:
DCD efficiently and selectively inhibits the activity of soil ammonia-oxidizing microorganisms, thereby reducing nitrification and preventing the conversion of ammonia nitrogen to nitrate nitrogen. This helps minimize nitrate nitrogen leaching and N2O greenhouse gas emissions.
2.Impact on Other Microorganisms:
DCD has no significant inhibitory or toxic effects on other soil microorganisms. This means that while it fulfills its targeted nitrification inhibition role, it does not adversely affect the entire soil microbial community.
3.Slow/Continuous Nitrogen Release:
When used in fertilizer formulations, DCD serves as a slow/controlled-release nitrogen source, contributing to improved nitrogen fertilizer utilization efficiency. This, in turn, reduces the overapplication of nitrogen fertilizer, thereby minimizing economic losses and environmental pollution.
4.Stable Physicochemical Properties:
DCD possesses stable physicochemical properties, with low water solubility, low volatility, and complete degradation. These characteristics help maintain its functionality in the soil and reduce adverse impacts on the environment.
5.Strong Targeting:
DCD exhibits highly efficient and specific inhibition of ammonia-oxidizing bacteria, such as Nitrosomonas europaea, showcasing strong targeting capabilities.
6.Biodegradation and Residue-Free:
DCD undergoes complete biodegradation in the soil, leaving no residues. Its degradation rate is influenced by soil temperature and rainfall, but overall, it demonstrates environmentally friendly characteristics.
In summary, the application of DCD in agricultural ecosystems demonstrates the potential to improve nitrogen fertilizer utilization efficiency while minimizing adverse environmental impacts.