This invention provides a composite biosynergist, its preparation method, and its application. The composite biosynergist is composed of
polyglutamic acid,
humic acid,
fucoidan oligosaccharide, and
plant polyphenols. The synergistic effect of the active substances
polyglutamic acid γ-PGA,
humic acid HA,
fucoidan oligosaccharide AOS, and
plant polyphenol PP in the composite biosynergist is essentially manifested in microscopic-scale functional complementarity and mechanism closed-loop. It achieves four functional pathways: blocking salt
toxicity through chelate channels, ensuring
nutrient supply through complexation channels, enhancing
nutrient absorption through root-promoting channels, and resisting stress damage through stress-resistant channels. Ultimately, it achieves the macroscopic effect of "improved soil physicochemical properties—enhanced root function—increased
crop stress resistance and yield." Its core
advantage lies in overcoming the functional limitations of single components and solving the industry pain points of "difficult-to-eliminate salt damage, easy
nutrient loss, and unstable improvement effect" in
saline-alkali
land improvement through molecular-level synergistic effects.