A Novel High Temperature Resistant and Multifunctional Nitrification Inhibitor: Synthesis, Characterization, and...

Area of Science:

• Agricultural Chemistry
• Materials Science

Background:

• Industrial nitrification inhibitors lack heat resistance for compound fertilizer production via high tower melt granulation.
• Developing heat-stable nitrification inhibitors is crucial for efficient fertilizer manufacturing.

Purpose of the Study:

• To synthesize a novel high temperature resistant and multifunctional nitrification inhibitor (HTRMFNI).
• To evaluate the HTRMFNI's performance in compound fertilizer fabrication and its impact on fertilizer properties.

Main Methods:

• Synthesis of HTRMFNI, a polymer encapsulating silicic acid and 3,4-dimethylpyrazole (DMPZ).
• Characterization of HTRMFNI's thermal stability (decomposition temperature ~212 °C).
• Fabrication of compound fertilizer using HTRMFNI and assessment of its nitrogen immobilization and phosphate-solubilizing abilities.

Main Results:

• HTRMFNI demonstrated good nitrification inhibition and phosphate-solubilizing ability prior to incorporation.
• The synthesized inhibitor possesses a decomposition temperature suitable for high tower melt granulation.
• The fabricated compound fertilizer exhibited effective nitrogen immobilization but lost phosphate-solubilizing ability.
• The addition of HTRMFNI did not negatively impact the compound fertilizer's physicochemical properties or overall performance.

Conclusions:

• HTRMFNI is a viable nitrification inhibitor for high-temperature compound fertilizer production.
• The loss of phosphate-solubilizing ability in the final product may be attributed to high-temperature induced damage to the polymer matrix.
• Further research could focus on enhancing the polymer matrix's stability to preserve multifunctionality at high temperatures.