The invention relates to a fermented alga liquid
fertilizer synergist and a production method and an application thereof. The
fertilizer synergist is a fermented alga liquid
fertilizer synergist obtained by performing microbial
fermentation on natural alga serving as a
raw material, preparing an alga extracting solution through procedures such as alkali extraction, filter pressing and the like, and adding chelated state trace elements into a liquid. Due to the adoption of the fermented alga liquid fertilizer synergist disclosed by the invention, the soil
urease activity can be suppressed remarkably, slow release of a fertilizer is enhanced, and the
crop yield can be increased remarkably; trace elements such as
boron,
zinc,
manganese and the like which are generally lacked in soil in China can be replenished;
root growth of crops can be facilitated, root activity is increased, and the capabilities of crops of absorbing
phosphorus,
potassium and medium and trace elements are increased; and the fermented alga liquid fertilizer synergist has the characteristics of reduction in
nutrient loss, avoidance of secondary
pollution, reduction in the production cost of a synergic fertilizer, wide
raw material source, convenience for adding in fertilizer production and the like, and has a wide application prospect in the production of the synergic fertilizer.