Sustained and controlled release fertilizer capable of preventing and controlling underground pests

The invention provides a sustained and controlled release fertilizer capable of preventing and controlling underground pests. The sustained and controlled release fertilizer comprises lime nitrogen particles, polyglutamic acid, humic acid, a sealing agent and fly ash. By controlling the thickness and proportion of the coating film in the sustained and controlled release fertilizer, the release rate of the sustained and controlled release fertilizer is effectively controlled, so that the sustained and controlled release fertilizer can be effectively released according to the growth rule of vegetables, the purpose of effectively preventing and controlling underground pests is achieved, and the yield of the vegetables can be effectively improved. 本发明提供了一种可防治地下害虫的缓控释肥料，该缓控释肥料包括石灰氮颗粒、聚谷氨酸、腐植酸、封闭剂和粉煤灰。通过控制缓控释肥料中包膜的厚度和比例，有效控制缓控释肥料的释放速率，使得该缓控释肥料能够根据蔬菜生长规律进行有效释放，达到对地下害虫有效防治的目的，且能够有效提高蔬菜产量。