Fulvic Acid
The importance of humic acid and fulvic acid
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Humic Acid (HA) is a plant and animal remains, mainly plant remains, through the decomposition and transformation of microorganisms, and a series of complex geochemical reactions and accumulated organic substances. It is a high molecular organic acid composed of aromatic and its various functional groups, and has good physiological activity and functions of absorption, complexation and exchange. The main elemental composition of humic acid is carbon, hydrogen, oxygen, nitrogen, sulfur, and is a polycondensate of a polyvalent phenolic aromatic compound and a nitrogen compound.

The fulvic acid is extracted from natural humus and is a group of substances which are soluble in alkali, acid and water and have a small molecular weight and a dilute solution which is yellow or brownish yellow. It is a reddish brown powdery substance that is soluble in water. Fulvic acid is the best core component of soil humus. It is a small molecular weight, fully water-soluble organic aromatic substance which is decomposed and decomposed by organic matter. It is the best humic acid component in soil and the core material for the formation of soil aggregate structure. .

Humic acid is used in agriculture as a nutrient soil additive, rooting and strong root fertilizer additive, soil conditioner, plant growth regulator, foliar fertilizer compound, cold resistance agent, drought resistance agent, compound fertilizer synergist, etc., with nitrogen, The humic acid fertilizer made by combining elements such as phosphorus and potassium has the functions of increasing fertilizer efficiency, improving soil, stimulating crop growth, and improving the quality of agricultural products. Magnesium humate, zinc humate and humic acid urea iron have good effects in supplementing soil magnesium deficiency, corn zinc deficiency and fruit tree iron deficiency; humic acid, herbicide ether, atrazine and other pesticides can be mixed to improve the efficacy. Inhibition of residual toxicity; sodium humate is effective in treating apple tree rot.

Fulvic acid is a broad-spectrum plant growth regulator that promotes plant growth and plays an important role in combating drought. It can improve plant resilience, increase yield and improve quality. The main application objects are wheat, corn, sweet potato, millet, rice, cotton, peanut, rape, tobacco, sericulture, melon and fruit, and vegetables.

Humic acid is the most vital element of organic matter in the soil and is the “brain gold” of the soil. Humic acid has a range of properties, such as CEC, oxygen content, and the ability to retain moisture. The most important thing is that humic acid can be combined with metal cations, oxygen, and hydrates to slowly accumulate and release them for use in crops.

The fulvic acid contains a large number of functional groups, which act on the soil particles to form agglomerates of different sizes and stable structure. After the soil is applied with fulvic acid, its surface activity can adsorb and exchange the applied fertilizer, and also transform the solidified part of the soil into a crop that can not be absorbed by the crop and can be absorbed and utilized, thereby improving nutrient utilization. . In the soil where fulvic acid forms agglomerate structure, the activity of microorganisms is strong, the biological activity is high, the nutrient supply is sufficient, and the preservation and supply of soil nutrients can be well coordinated, thereby improving soil fertility.

The “five major effects” of humic acid in agriculture (improving soil, enhancing fertilizer, stimulating growth, enhancing stress resistance and improving quality) have been guiding the application and progress of humic acid in agriculture.

Fulvic acid is a humic acid product with a wide range of uses and high economic benefits. It still has a large market and competitive advantage in plant growth agents, anti-reverse agents, fluid fertilizers, pharmaceutical preparations and cosmetics. The “four-drug function” of fulvic acid in agriculture (drought-resistant agents, growth regulators, pesticide slow-release synergists and chemical element complexing agents) is a classic, and it is unique as a drought-resistant agent.

Fulvic Acid
Fulvic acid function of drought resistance
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The fulvic acid substance plays a huge role in alleviating the agricultural drought hazard. Although the fulvic acid products produced by different sources and different manufacturers have different effects on the crop and the effect on the transpiration resistance of the crop, However, a large number of test results show that the drought resistance function of the source fulvic acid is the most obvious.

Reduce the opening of the pores and reduce the transpiration of water. Two days after spraying, the pore width was reduced by 72.7%. On the 9th day, the total transpiration was reduced by 13.7% compared with the control, and the soil moisture content was increased by 1.5%. The results of continuous observation showed that the effect of reducing the opening degree of the pores after application lasted for more than 12 days, and basically disappeared on the 13th day. Afterwards, the test results of the Hami City Agricultural Bureau of Xinjiang further verified the mechanism of anti-transpiration of fulvic acid. They sprayed different concentrations of fulvic acid at the booting stage of wheat, and found that with the increase of dosage and concentration, the stomatal closure degree increased correspondingly, and the duration of drug effect was also extended, up to 22 days.

Promote root development and increase root activity. Zhu Hansu used wheat to carry out fulvic acid seed dressing, and investigated the number and length of secondary roots. The effect can be continued from the seedling stage to the wintering and returning stage. In the field investigation, the planting of the seed dressing was robust, the root-shoot ratio was increased, the senescence of the lower leaves was delayed, the number of green leaves remained, the photosynthetic area increased, and the dry matter accumulation increased.

The fulvic acid also has obvious effects on the growth and vitality of roots such as corn, rice, peanut and sweet potato. Corn was mixed with 0.5% fulvic acid, the average root length increased by 3.6 cm, the number of roots increased by 1.3, and the dry matter weight increased by 1.45 g, thereby increasing the absorption of nitrogen, phosphorus and potassium in the soil. Whether it is seed dressing, soaking or spraying.

The effect on soil water holding capacity. Spraying fulvic acid inhibits crop transpiration, slows down soil water consumption, and increases soil water content. In addition, fulvic acid has the effect of improving soil structure, which is conducive to maintaining soil water balance and saving water and water. The crop can be smoothly passed through the dry period. Meng Yuanping test measured the change of soil water content in different periods after spraying fulvic acid on wheat, and the consumption decreased by 4.3%–5.1% within 10-20 days after spraying. It has also been reported that after spraying fulvic acid on corn, the water content in different deep layers of soil increases by 7.0%–35.7.

Fulvic Acid
Fulvic acid effect to crop disease resistance
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The fulvic acid product is a black powdery substance, soluble in water, and the aqueous solution is acidic, non-toxic, stable in the natural environment, and easily flocculated in the presence of high-priced metal ions.

Fulvic acid increases the disease resistance of crops

According to domestic and foreign data, fulvic acid has a certain preventive effect on a variety of plant diseases.

Prevention and treatment of wheat gibberellin. According to Ye Meide and other experiments, in the case of the same amount of carbendazim, the treatment of fulvic acid treatment reduced the disease rate by 30% compared with carbendazim alone, and improved the control effect.

Prevention and treatment of sweet potato diseases. According to the results of Chang Zengrong et al. on the control of sweet potato black spot, the rooting of “sodium fulvate decamethyl thiophanate” was better than that of sodium fulvic acid alone; the test showed that sodium fulvate alone Or mixed with methyl thiophanate has good control effect on sweet potato root rot and black spot.

Prevention and control of peanut leaf spot. According to the test results of the prevention and control of peanut leaf spot disease after the combination of fulvic acid and carbendazim, fulvic acid and methyl thiophanate in Baoding Agricultural School, it fully shows that fulvic acid has increased to carbendazim and methyl thiophanate. It has an effect, saves pesticides and reduces costs. It is an ideal pesticide synergist.

Prevention and treatment of cotton blight and verticillium wilt. Wang Shuqi et al. systematically studied the control effect and synergistic effect of fulvic acid salt on cotton blight and verticillium wilt. The test results show that the application methods of irrigation and spraying have obvious control effects on cotton blight and verticillium wilt, and the control of the disease is also improved with the increase of drug dosage or application frequency. Spray 5000 times liquid, once every 10-15 days, need to spray 3 times; root irrigation with 2000 times liquid fulvic acid, 10-15 days once, twice is appropriate. Through two years of field control experiments, the control effect of root irrigation and seed dressing is better than spraying, but root irrigation is not easy to apply, and seed dressing is the most labor-saving and time-saving method, easy to promote.

Prevention and treatment of apple rot disease. According to the research results of the agricultural school in Hengshui area, before the bud sprouting in the middle and late February, the apple rot lesions were scraped off, and the wound was protected with 5,000 times solution of fulvic acid solution, and then applied once every 30-40 days. The results of the investigation showed that the lesions after the cure were basically cured and the recurrence rate of the lesions was very low. According to Xu Xudan and other methods, the use of fulvic acid and the above method to control apple rot disease, the control effect is also good.

Prevention and treatment of iron deficiency yellowing. According to the results of the experiment of yellowing disease such as sea bream, apple, pear and tomato by the Institute of Atomic Energy of Chinese Academy of Agricultural Sciences and Lu Xin, iron fulvic acid is an ideal drug for preventing iron deficiency yellowing, which is not only better than sulfate Iron and organic iron chelating agent, and low cost, safe to use, not easy to produce phytotoxicity, can improve product quality and quality.

The fulvic acid is not magical, but it is creating magic. It is a precious wealth left by nature for hundreds of millions of years. There is no chemical equation for complexity, and artificial can not be synthesized at all.