The Application of Poly-γ Glutamic Acid in Agriculture: A Review

Abstract

Poly-γ-glutamic acid (γ-PGA) is an environment-friendly polymeric biomaterial with good water absorption and slow-release. Its metabolites are non-toxic and edible, and it has hence been widely used in a wide range of fields including cosmetics, food and medicine. Its application in agriculture is mainly as a soil conditioner to improve the ability of soil to retain water, as well as a fertilizer synergistic agent. Studies in recent years have concluded that γ-PGA has a potential application in many areas in agricultural production. In this paper, we reviewed its application as a soil conditioner to improve water bioavailability. We reviewed previous studies on the effects of γ-PGA on physicochemical and biological properties of soil, fertilizer leaching and adsorption, the ultimate crop growth and development, as well as nutrient absorption and physiological traits of different crops. We also outline the existing research challenges and the prospects of γ-PGA in its application in agricultural production.

Keywords

• γ-pga
• agricultural application
• soil conditioner
• review