Controlled-release type fertilizer with decreased floating property comprising tri-block copolymer and method for preparing the same

摘要

Granular fertilizer core; A coating layer (shell) formed on the surface of the granular fertilizer core and containing an olefin resin; And an additive comprising an ethylene oxide-propylene oxide-ethylene oxide (EO-PO-EO) or propylene oxide-ethylene oxide-propylene oxide (PO-EO-PO) tri-block copolymer attached to the coating layer. Dissolution control fertilizer.