In recent years, the concept of green development of ecological agriculture has gradually evolved into a profound revolution in the agricultural development concept, and has also become the main direction of agricultural supply-side structural reform. With the supporting fertilizer "zero growth", weight loss efficiency, organic fertilizer replacement fertilizer and other policy requirements have been introduced, but also in the field of agricultural materials set off a "scientific fertilizer, green development" transformation storm. Under the storm of this green revolution, the product of mineral fulvic acid was born. What is the magic of mineral fulvic acid? Let's introduce it in depth.

Fulvic acid

Fulvic acid is a kind of short carbon chain small molecular structure substance extracted from natural humic acid. It is the water-soluble part of humic acid with the smallest molecular weight and the highest content of active groups, and widely exists in nature. Among them, the soil contains the largest proportion of xanthohuic acid, which is mainly composed of natural, small molecular weight, yellow to black brown, amorphous, colloidal, fat and aromatic organic polyelectrolytes, which can not be expressed by a single chemical structure formula.

The role of mineral fulvic acid:

1, improve the soil: fulvic acid is the food of microorganisms

The soil aggregate structure can be changed under the influence of fulvic acid. Fulvic acid contains a large number of functional groups, which interact with soil particles to form aggregates of different sizes and have a stable structure. Its molecular exchange capacity is between 400-600me/100g, and the ion exchange capacity of ordinary soil is only between 10-20me/100g. "That is to say, after the soil is applied with fulvic acid, its surface activity can adsorb and exchange the fertilizer applied in the complex, and also convert the solidified part of the soil from what can not be absorbed by crops to what can be absorbed by crops, thereby improving the utilization of nutrients, which is different from ordinary compound fertilizers."

In addition, fulvic acid is the food of microorganisms. In the soil with the formation of fulvic acid, the microbial activity is strong, the biological activity is high, the nutrient supply is sufficient, and the preservation and supply of soil nutrients can be better coordinated, so as to improve the soil fertility. After a large number of soil microorganisms multiply, the effective nutrients that are solidified in the soil will be converted and released and absorbed by crops.

In addition, fulvic acid can also repair heavy metal pollution in soil, fulvic acid complex heavy metals, especially hexavalent chromium into trivalent chromium, so that it passivates, from toxic to non-toxic. Normal systematic treatment of the treated soil can be used for planting that year, the right amount of good use will also increase production, and the resulting crops are more ecological.

In addition, fulvic acid can also regulate the pH value of the soil and balance the pH of the soil. Mineral fulvic acid has a bidirectional effect on soil regulation, regulating acid when encountering acid, regulating alkali when encountering alkali, that is to say, it can adjust the soil to the pH environment suitable for crop growth. Also mineral source fulvic acid can eliminate soil compaction.

2, improve fertilizer utilization, save costs, reduce fertilizer pollution

Fulvic acid can greatly improve fertilizer efficiency, nitrogen, phosphorus, potassium and trace element fertilizer as the list, can be used as nitrogen fertilizer slow release agent, phosphate fertilizer activator, potassium fertilizer quick acting agent, micro fertilizer chelating agent.

Xanthohumic acid, a sustaining-release agent of nitrogen fertilizer, can inhibit urea decomposase and nitrate decomposase in soil. "As we all know, compound fertilizer and compound fertilizer raw materials mainly use urea as nitrogen fertilizer, urea is amide nitrogen, after application into the soil, must be under the action of urease, converted into ammonium nitrogen or nitrate nitrogen to be absorbed by crops. Fulvic acid has an inhibitory effect on urease and nitrifying enzyme, thus improving the utilization rate of amide nitrogen. The inhibition of mineral fulvic acid on enzymes can last for about 100 days. Fulvic acid can inhibit the decomposition of urea during the growing period of crops, thus reducing the volatilization of urea. This proves that fulvic acid has a slow-release effect. In the middle and late stages of crop growth, with the absorption of fulvic acid, the inhibition of urease is weakened, and urea release is gradually increased to meet the large demand for nitrogen in the vigorous period of crop development. In addition, fulvic acid can also inhibit the activity of nitrification enzyme, improve the utilization rate of urea, and increase the stability of ammonia.

The active agent of phosphate fertilizer, and the direct reason why fulvic acid improves the fertilizer efficiency of phosphate fertilizer is: Fulvic acid will form fulvic acid-metal-phosphate complexes with phosphate fertilizer, such as iron fulvic acid, aluminum fulvic acid, and phosphorus fulvic acid, so that after the formation of the complex, it can prevent the soil from fixing phosphorus, but also make crops easy to absorb, thereby improving the utilization rate of phosphate fertilizer, the utilization rate from the original 10%-20% to 28%-39%. "In the soil, the application of phosphate fertilizer is generally mono-ammonium phosphate and diammonium phosphate, they are easily fixed in the soil, so the utilization rate is low, after adding xanthohuic acid, the formation of a ternary stable structure, so that phosphorus, iron, calcium, magnesium, aluminum and other forms a ternary complex or chelate, thereby improving the utilization rate of phosphorus." Related studies showed that the combination of fulvic acid and phosphate fertilizer increased the availability of phosphorus by 14.6% and the fixation rate of phosphorus inhibition by 8.4 times compared with that of phosphate fertilizer alone.

Studies have shown that fulvic acid can promote the release of insoluble potassium, improve the release of soil available potassium, especially water-soluble potassium, and reduce the fixation of potassium fertilizer. When humic acid combines with potassium ions, the cured part of potassium in the soil is released, and the part that can not be absorbed and utilized by crops is transformed into the part that can be absorbed and utilized by crops, which greatly improves the utilization rate of potassium and reduces the loss of potassium with water flow and is fixed by the soil.

At present, micro-fertilizer mainly includes a series of sulfate, zinc sulfate, iron sulfate, copper sulfate, keto acid, etc., but this part of micro-fertilizer applied into the soil, it is easy to be solidified by the soil, from soluble to insoluble, difficult to be absorbed and utilized by crops, thus losing the effectiveness of micro-fertilizer. After a group of experiments on zinc sulfate and zinc fulvic acid, the zinc content in zinc sulfate is about 30%, and the zinc content in zinc fulvic acid is 5%. Through tracking test method, the zinc content in plants is measured, and the zinc content in zinc fulvic acid is 30% more than that in zinc sulfate, which shows why fulvic acid improves the utilization rate of micro-fertilizer and applies fulvic acid to soil. Because fulvic acid has a large number of active groups (carboxyl, benzene hydroxyl, methoxy) and trace elements in the soil complex reaction, the part of the soil solidified can not be absorbed by crops into absorbable utilization, thus greatly improving the utilization rate of trace elements." Through experiments, it was found that the mineral source fulvic acid can chelate with trace elements such as iron and zinc to produce chelates of trace elements of fulvic acid with good solubility and easy to be absorbed by plants