High-quality Mineral-Source Potassium Fulvate must be comprehensively evaluated from five dimensions: "raw materials, components, characteristics, effects, and safety", all of which are indispensable. Ultimately, it must meet the core requirements of "high activity, few impurities, stable effects, and safety & environmental protection".
High-quality products must be derived from lignite and peat (especially "young lignite" or "soft lignite"). These minerals have a high total humic acid content (usually ≥60%), a high proportion of fulvic acid that is easy to extract, and naturally contain potassium, eliminating the need for additional chemical potassium fertilizers (to avoid introducing impurities).
Inferior products are often based on "aged lignite" (where humic acid is solidified and hard to extract) or mixed with non-mineral raw materials such as coal powder and soil, resulting in obvious inherent quality defects. Meanwhile, high-quality raw materials must undergo strict screening to remove impurities like gangue and sediment, ensuring the basic content of "extractable fulvic acid" is ≥40%.
High-quality Mineral-Source Potassium Fulvate must comply with the standard NY/T 3428-2019 Humic Acid for Fertilizer Grade and provide a third-party test report (not self-tested). The core indicators must meet the following requirements:
• Fulvic acid content ≥50% (high-purity products can reach over 60%): This is the core for promoting root growth, improving soil, and enhancing fertilizer efficiency; the higher the content, the stronger the activity;
• Potassium oxide content ≥10%: It must be extracted from pure mineral sources without additional adulteration. If the content is too low, it may be "diluted with water" or mixed with fillers;
• Water-insoluble matter content ≤3% (≤1% for high-quality products): Excessive water-insoluble matter (such as sediment and humic acid residues) can easily block drip irrigation pipes and has no fertilizer effect;
• Compliance with heavy metal content standards: Lead ≤5mg/kg, cadmium ≤0.5mg/kg, mercury ≤0.1mg/kg. Heavy metals must be removed through acid washing and chelation processes to avoid polluting soil and crops;
• pH value 5.0-8.0 (neutral to weakly acidic): Suitable for the soil environment of most crops. Excessive acidity (<4.5) or alkalinity (>9.0) will destroy the soil's acid-base balance.
The quality can be initially assessed via simple tests, and high-quality products exhibit distinct identifiable features in their physical and chemical properties.
• Appearance and odor: Mostly black/dark brown powder (or crystalline particles), fine and uniform. Slight caking can be crushed by hand (hard caking indicates inferior quality); it has only a faint "coal smell" (natural mineral odor), without pungent odors such as sour or rotten smells (odors are mostly caused by mixing chemical fertilizers or moldy raw materials);
• Water solubility: Take 10g of the product and add 100ml of room-temperature water. It dissolves quickly after stirring for 30 seconds, and the solution is dark brown and transparent, with no stratification or precipitation after standing for 24 hours; Inferior products dissolve slowly, with suspended particles or turbidity;
• Hard water resistance: When dissolved in well water (hard water containing magnesium and calcium ions), it can still dissolve stably without white flocculation; Inferior products easily combine with calcium and magnesium ions to form precipitates, rendering the active ingredients ineffective.
The functions of high-quality products must be reflected in actual planting, with specific performances as follows:
• Fast root promotion: After 7-10 days of application on crops (such as tomatoes and wheat), fibrous roots increase and taproots thicken, enabling rapid seedling recovery during seedling raising or after transplanting; Inferior products have no obvious root-promoting effect and may even damage roots;
• Good soil improvement: After 2-3 consecutive applications (drenching/drip irrigation), compacted soil becomes loose and water infiltration accelerates. White frost on the surface of saline-alkali soil decreases, and leaf yellowing is alleviated;
• Enhanced fertilizer efficiency: When used with NPK fertilizers, it reduces nitrogen volatilization and phosphorus fixation, keeping crop leaves dark green without premature aging, promoting rapid fruit expansion, and reducing empty/malformed fruits;
• Strong stress resistance: During drought, leaves wilt slightly and recover quickly; at low temperatures, root absorption capacity does not decrease, and it has a mitigating effect on mild soil-borne diseases;
• High quality: The sweetness of fruits and vegetables increases by 1-2 degrees, with uniform color and good storage resistance; leafy vegetables have less fiber and a tenderer taste.
High-quality products are not only effective but also safe: No hormone residues (no regulators such as sodium nitrophenolate added to avoid crop premature aging and fruit malformation); even when used at 1-2 times the recommended dosage, it will not burn roots or seedlings (fulvic acid is a natural organic acid with strong buffering capacity); long-term use causes no heavy metal accumulation or excessive soil salt, meeting the requirements of green agriculture.
Our product fully meets and exceeds the above high-quality standards, with significant competitiveness in raw materials, technology, effects, and other aspects.
Raw materials are carefully selected as "young lignite and peat with extractable fulvic acid ≥45%", and gangue and sediment are completely removed through a 3-level impurity removal process; advanced high-tech extraction technology is adopted to maximize the retention of fulvic acid activity while achieving complete separation of impurities, avoiding the loss of active ingredients caused by traditional processes.
The product has two specifications, with indicators far exceeding the industry average. Each batch is accompanied by a nationally recognized third-party test report:
• Specification 1: Humic acid >55%, fulvic acid >50%, potassium oxide ≥12%, organic matter ≥70%, water solubility >99%, moisture ≤12%;
• Specification 2: Humic acid ≥60%, fulvic acid >55%, potassium oxide ≥18%, organic matter ≥70%, water solubility >99%, moisture ≤12%;
Among them, the potassium oxide content is higher than the industry standard of "≥10%", and the water solubility reaches over 99% to achieve "true full water solubility", which does not block drip irrigation pipes. With a pH value of 8-10, it can also be adapted to saline-alkali soil improvement, expanding application scenarios.
The product is a fine powder with uniform particle size, which dissolves completely in water within 30 seconds, and the solution is transparent without precipitation; it does not flocculate even in hard water environments in northern China, adapting to different water qualities; it has only a natural coal smell, no peculiar smell, no hormone addition, and does not burn roots when used at high concentrations, suitable for green and organic crop planting.
The effects are remarkable in tests on various crops:
• Field crops: After application on wheat and corn, tillering increases, grain filling is full, yield increases by 8%-15%, drought resistance is enhanced, and the lodging rate during the filling stage decreases by more than 20%;
• Fruit and vegetable crops: The seedling recovery period of tomatoes and cucumbers is shortened by 3-5 days, the number of fruits per plant increases by 10%-15%, and the sweetness increases by 1-2 degrees; strawberries have bright color, sweet taste, and a shelf life extended by 3-7 days;
• Soil improvement: After 2 consecutive applications in saline-alkali soil with pH 8.5-9.0, the soil pH decreases by 0.3-0.5, bulk density decreases by 0.1-0.2 g/cm³, and looseness is significantly improved.
The product has no heavy metal residues and does not pollute the soil after long-term use. It is not only an efficient fertilizer but also an important choice for improving soil quality and ensuring food safety. It is widely used in green agriculture, organic agriculture, and high-standard farmland construction to support the sustainable development of agriculture.
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