Long-acting slow-release fertilizer used in planting early stage of Pseudostellaria heterophylla and preparation method thereof

The invention discloses a long-acting slow-release fertilizer used in a planting early stage of Pseudostellaria heterophylla and a preparation method thereof. The long-acting slow-release fertilizer comprises a fertilizer component and is formed through the steps that the fertilizer component is adsorbed by porous starch, and uniformly mixed with a water-soluble solid powder-like carbon source anda carrier material and mutually dissolved, and then solidified and smashed into particles, wherein a using proportion of the fertilizer component : the porous starch : the water-soluble solid powder-like carbon source and the carrier material is 1:1:(1.2 to 1.5). The preparation method comprises three steps of uniformly mixing fertilizer component, adsorbing and coating. According to the long-acting slow-release fertilizer, based on biology and cultivation characters of the Pseudostellaria heterophylla, the fertilizer component is innovatively coated with a slow release system, thus effectively solving a fertilizer r