γ-polyglutamic acid is a green and environment-friendly polymer material with good adsorption, water retention and biocompatibility. It can be completely degraded by organisms and has a good application prospect in agricultural production.
This article discusses the application of polyglutamic acid urea products under the current trend of green sustainable development of agriculture.
Nitrogen fertilizer application is the key to increasing agricultural production, and it is also an important measure to increase farmers’ income. After traditional nitrogen fertilizer is applied to the soil, the loss rate is as high as 70% through the processes of volatilization, leaching and denitrification. This huge waste and its pollution of the environment and water quality have aroused widespread concern.
In recent years, new fertilizers have gradually replaced traditional chemical fertilizers and become the focus of development and innovation in the field of chemical fertilizers.
Polyglutamic acid urea is a value-added urea product produced by adding highly active polyglutamic acid fertilizer synergist to ordinary urea. The product can promote the growth of crops, reduce the harm of nitrogen to crops, improve the utilization rate of nutrients, and increase the yield and income of crops.
Polyglutamic Acid Synergist: The synergist of polyglutamic acid used in fertilizer is mainly solution type. Its concentration is 3.5%~7.0%, and its color is tan or dark brown. In chemical fertilizers, the general addition ratio of γ-PGA is 0.05%~0.08%.
γ-PGA has a strong chelating function for the nutrients needed by plants, and can enrich nitrogen, phosphorus, potassium and medium and micronutrient elements in the soil for plant absorption and utilization.
Functions of Polyglutamic Acid Urea Product
Polyglutamic acid is a biopolymer formed by the polymerization of glutamic acid, which has dual regulatory effects on fertilizers and plants:
One is that the side chain of polyglutamic acid has a large number of active carboxyl groups, which can reduce the loss of fertilizer nutrients and improve the utilization rate of fertilizers.
The second is to bind to cell membrane receptor proteins, stimulate plant growth through calcium ions, hydrogen peroxide and other signaling pathways, and improve plant stress resistance.
Polyglutamic acid urea has the following functions in crop planting: increase the number of capillary roots and white roots of crops, improve root activity, and improve nutrient absorption capacity.
Regulate the key enzyme activity of plant nitrogen metabolism, thereby improving the absorption and assimilation of nitrogen by plants.
Contains a large number of active carboxyl groups and has strong moisture absorption and water retention capabilities.
The large amount of active groups contained has the function of chelating and preserving fertilizer, which can reduce the loss of fertilizer nutrients and increase crop yield.