Alginate Oligosaccharide (AOS), as a natural marine biostimulant, has shown significant fertilizer synergist potential in the agricultural field in recent years.
Fertilizer synergist mechanism of Alginate Oligosaccharide
Alginate Oligosaccharide is oligosaccharides (DP 2-10) obtained by enzymatic or chemical degradation of alginate.
Their enhancement effect is mainly reflected in:
– Nutrient carrier function: carboxyl and hydroxyl groups in the molecule can chelate with metal ions (such as K⁺, Ca²⁺, Fe²⁺) to improve the mobility of trace elements.
– Biostimulation effect: Activate plant defense-related enzymes (PAL, SOD) and growth hormone (IAA) synthesis pathways, and promote root development.
– Soil improvement function: Promote the proliferation of beneficial microorganisms (such as nitrogen-fixing bacteria) and improve the rhizosphere microecology.
Solubility advantage of brown Alginate Oligosaccharide
Solubility is a key indicator that determines the practicality of fertilizer synergist, and Alginate Oligosaccharide performs outstandingly:
– Excellent water solubility: small molecular weight (usually <3000 Da), completely soluble in cold water (solubility >200 g/L, 25℃), suitable for foliar spraying or drip irrigation systems.
– Wide pH adaptability: Stable in the pH range of 3-9, no precipitation reaction with conventional fertilizers.
– Temperature stability: no significant degradation below 80℃, suitable for fertilizer granulation process.
Comparative analysis with polyaspartic acid (PASP)
– Similarities
Both are environmentally friendly polymers and biodegradable.
Possess metal ion chelation ability, reducing phosphorus fertilizer fixation.
Can delay urease activity and reduce nitrogen volatilization loss.
– Differences
PASP mainly inhibits soil nutrient fixation through electrostatic adsorption; while Alginate Oligosaccharides have both physical chelation and biological regulation functions, and Alginate Oligosaccharides are superior to PASP in improving crop resistance.
Conclusion
Alginate Oligosaccharides have become an ideal choice for the new generation of fertilizer synergist due to their excellent solubility and multifunctional growth-promoting mechanism. Compared with traditional PASP, it has more outstanding performance in biological activity, but the production process needs to be further optimized to reduce costs. The cross-integration of marine biological resources and green agriculture will bring new breakthroughs to the fertilizer industry.