Special slow release-controlled release fertilizer for potatoes

Disclosed is a sustained-release/controlled-release fertilizer, the fertilizer comprising the following effective components: nitrogen, phosphorus, potassium (NPK) composite fertilizer, diammonium phosphate, urease-nitrification inhibitor and controlled-release agent; the components are as follows in parts by mass: 20-40 parts of NPK composite fertilizer, 15-30 parts of diammonium phosphate, 0.2-0.6 parts of urease-nitrification inhibitor, and 4-6 parts of controlled-release agent. The fertilizer organically combines a urease/nitrification sustained-release chemical fertilizer technology with a controlled-release chemical fertilizer technology, and develops a synergistic effect. The technology not only enables sustained release of fertilizer, but also reduces the loss of released nutrient, thus having the double effect of sustained release and controlled release. In addition, the controlled-release material micro-nano web can control the migration and loss of urease inhibitor and nitrification inhibitor, thus not only enhancing sustained release effect, but also reducing pollution to the environment caused by the loss. The fertilizer is of significance in high yield of potato or corn, and in ecological environment protection.