1. Fulvic acid

Fulvic acid is a 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 active group content. It is widely present in nature. Among them, the proportion of fulvic acid contained in the soil is the largest, which is mainly composed of natural, small molecular weight, yellow to dark brown, amorphous, gelatinous, fatty and aromatic organic polyelectrolytes. A single chemical structure cannot be used. Said.

2. The role of mineral fulvic acid:

1. Improve the soil: Fulvic acid is the food of microorganisms

Affected by the action of fulvic acid, it can change the structure of soil aggregates. Fulvic acid contains a large number of functional groups, which interact with soil particles to form aggregates of different sizes and stable structures. 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 fulvic acid is applied to the soil, its surface activity can absorb and exchange and complex the fertilizer applied, and at the same time, it also converts the solidified part of the soil, from what cannot be absorbed by crops to what can be absorbed by crops. Thereby improving the nutrient utilization rate, which is different from ordinary compound fertilizer."

Fulvic acid is also the food of microorganisms. In the soil in which fulvic acid forms a granular structure, the activity of microorganisms is strong, the biological activity is high, and the nutrient supply is sufficient. The preservation and supply of soil nutrients can be better coordinated, thereby improving soil fertility; and after the mass reproduction of soil microorganisms, it will The part of the effective nutrients that are solidified by the soil is transformed and released and absorbed by the crop.

In addition, fulvic acid can also repair heavy metal pollution in the soil. Fulvic acid complexes heavy metals, especially hexavalent chromium turns into trivalent chromium, which inactivates it from toxic to non-toxic. The soil treated by the normal systemic treatment can be used for planting in the same year. If the proper amount is used, the yield will be increased, and the planted crops will be more ecological.

In addition, fulvic acid can also adjust the pH of the soil and balance the pH of the soil. Mineral fulvic acid has a two-way effect on the regulation of the soil. It adjusts the acid when it meets the acid and adjusts the alkali when it meets the alkali, which means that it can adjust the soil to a pH environment suitable for crop growth. Also, mineral fulvic acid can eliminate soil compaction.

2. Improve fertilizer utilization, save costs, and reduce fertilizer pollution

Fulvic acid can greatly improve fertilizer efficiency. It is listed as nitrogen, phosphorus, potash fertilizer and trace element fertilizers. It can be used as a slow-release agent for nitrogen fertilizers, an activator for phosphate fertilizers, a quick-acting agent for potash fertilizers, and a chelating agent for micro-fertilizers.

a slow-release agent of nitrogen fertilizer, fulvic acid has an inhibitory effect on urea decomposing enzymes and nitrate decomposing enzymes in the soil. "Everyone knows that the main raw materials for compound fertilizer and compound fertilizer are urea as nitrogen fertilizer. Urea is amide nitrogen. After being applied to the soil, it must be converted into ammonium or nitrate nitrogen under the action of urease before it can be absorbed and utilized by crops. 。Fulvic acid has an inhibitory effect on urease and nitrase, thereby increasing the utilization of amide nitrogen. The inhibitory effect of mineral fulvic acid on enzymes can last for about 100 days. Fulvic acid can last for about 100 days during the growth period of crops. It can inhibit the decomposition of urea, thereby reducing the volatilization of urea. This proves that fulvic acid has a slow-release effect. In the middle and late stages of crop growth, as the crop absorbs fulvic acid, its inhibitory effect on urease is weakened, and urea is released The amount has gradually increased to meet the large demand for nitrogen during the period of vigorous crop development. In addition, fulvic acid can also inhibit the activity of nitrase, increase the utilization rate of urea, and increase the stability of ammonia.

The activator of phosphate fertilizer, and the direct reason why fulvic acid improves the efficiency of phosphate fertilizer is: fulvic acid will form fulvic acid-metal-phosphate complex with phosphate fertilizer, such as iron fulvic acid, aluminum fulvic acid, yellow rot Acid phosphorus, after forming a complex in this way, can not only prevent the soil from fixing phosphorus, but also make it easy for crops to absorb, thereby increasing the utilization rate of phosphorus fertilizer from the original 10%-20% to 28%-39%. "In the soil, phosphate fertilizers are generally monoammonium phosphate and diammonium phosphate. They are easily fixed in the soil, so the utilization rate is low. After adding fulvic acid, a ternary stable structure is formed, which makes phosphorus, iron, calcium, Magnesium, aluminum, etc. form a ternary complex or chelate, thereby increasing the utilization of phosphorus. Relevant studies have shown that the combination of mineral-source fulvic acid and phosphate fertilizer increases the effectiveness of phosphorus by 14.6% compared with phosphate fertilizer alone. The phosphorus fixation rate was increased by 8.4 times.

Potassium fertilizer fast-acting agent, research shows that fulvic acid can promote the release of insoluble potassium, increase the release of soil available potassium, especially water-soluble potassium, and can also reduce the fixation of potassium fertilizer. When humic acid is combined with potassium ions, the solidified part of potassium in the soil is released, and the part that cannot be absorbed by crops is transformed into what can be absorbed and used by crops, thus greatly improving the utilization rate of potassium and reducing potassium. Lost with water and fixed by soil.