Vigilancia Tecnológica

The present invention relates to a trace element-amino acid chelate/urea-formaldehyde slow-release fertilizer and a reactive extrusion preparation process therefor. Said slow-release fertilizer consists of a biodegradable urea-formaldehyde polymer and a trace element-amino acid chelate, wherein the macromolecular chain of the biodegradable urea-formaldehyde polymer interpenetrates into a cross-linked network structure of the molecular chain of the trace element-amino acid chelate, thereby the two structures forming a polymer composite having a semi-interpenetrating network structure. Said slow-release fertilizer solves the defect of a single nutrient in existing urea-formaldehyde slow-release nitrogen fertilizers and provides various nutrients for plant growth, and also can improve the utilization efficiency of nitrogen contained in urea-formaldehyde and introduced trace elements such as ferrum, copper and zinc. In addition, the reactive extrusion granulation process has the advantages of continuous large-scale production, low investment and low cost, no use of solvents harmful to human bodies and environment, simplified volatile matter removal and granulation processes for the polymer, high efficiency, uniform product performance and the like. Therefore, the present invention has good application prospects.