Research data shows that potassium fulvic acid is an efficient green fertilizer that can stimulate crop growth, increase nutrient utilization, improve crop resistance, and improve the quality of agricultural products. The articles in the last few days will summarize the role of potassium fulvic acid, systematically analyze the mechanism of potassium fulvic acid, and provide a theoretical basis for users to efficiently and scientifically use potassium fulvic acid.

The role of potassium fulvic acid: Stimulate the growth of plant roots.

Potassium fulvic acid stimulates the growth of plant roots is the original power to promote plant growth. The results showed that potassium fulvic acid treatment could increase the number of lateral roots of tomato by 2~3 times and the length of lateral roots by 4~23 times. The main reason is that after the action of potassium fulvic acid, plants show a similar stimulus response to the addition of exogenous auxin. As a biostimulant, potassium fulvic acid can significantly improve the biochemical activity of plants, produce similar auxin to roots, change the permeability of cell plasma membrane, and promote the synthesis of plant protein and cell growth. Potassium fulvic acid stimulates plant roots and makes them different in genes such as sucrose metabolism, ATPase, and cytoskeletal protein synthesis. Potassium fulvic acid can promote the expression of H+-ATPase-encoding gene MH42 in corn rhizomes, which is an inducible factor of H+-ATPase on the cell membrane. The increase in the number of H+-ATPase on the cell membrane surface can increase the electrochemical proton gradient of the cell, promote the migration of protons across the membrane, improve plant nutrition, and promote the growth of plant roots.

Potassium fulvic acid can also stimulate the Arabidopsis root hair cell negative regulator, reduce its expression, promote the remodeling of root morphology, increase the area of ​​the root system that absorbs nutrients, and achieve the effect of promoting growth.

The role of potassium fulvic acid: stimulate plant roots to absorb nutrients.

Potassium fulvic acid can also promote the absorption of nutrients in plant roots, mainly as nitrate absorption. Potassium fulvic acid can promote the absorption and assimilation of nitrate in plant roots. Under the action of low molecular weight humic acid, nitrate can promote the absorption of the related gene MHA2 and the expression of the assimilation related gene NR1 in corn roots. In addition, potassium fulvic acid can reduce the pH value of the plant root cell membrane surface, neutralize the alkaline environment generated by nitrate as a nitrogen source, inhibit the same direction transfer of H+ and NO3, thereby promoting the absorption of nitrogen by plants . Therefore, potassium fulvic acid can stimulate the assimilation and absorption of nitrate by regulating the internal environment of plant roots.

Potassium fulvic acid can also be used as a nutrient absorbed by plants, especially small molecules of humic acid can easily reach the plasma membrane of higher plants and be absorbed and utilized by root cells. Studies have found that small molecular weight components have a higher structure of hydroxyl and phenolic hydroxyl functional groups, and are the most active part of potassium fulvic acid, which is easier to be absorbed by plants, and has a better stimulating effect on plant root growth and nutrient segregation absorption.