1、Frontiers

Under W2 irrigation, the W2F2 treatment achieved optimal performance, with plant height, aboveground dry weight, SPAD, and tuber yield increasing by 56.67%, 71.24%, 21.69%, and 121.29%, respectively, compared to CK.

2、Effects of New Special Formula Fertilizer on Potato Growth

The effect of a novel, fulvic acid-based specialized fertilizer for drip application on potato growth, development, yield, and fertilizer efficiency is investigated.

3、How Much Potassium Fulvic Acid (in grams) Should Be Used in Drip

Potassium fulvic acid (also known as fulvic acid fertilizer) is an organic-matter-containing compound fertilizer, with humic acid as its main component. It can improve soil structure, enhance soil fertility, and promote plant growth.

4、Fulvic Acid and Potassium Application to Mitigate Drought Effects on

The fulvic acid application significantly mitigated these effects, particularly at a higher rate alongside adequate potassium (120 kg ha −1 K). This mitigation is likely attributable to improved nutrient water uptake and osmotic adjustment.

5、Determining organic

Then, we applied the PCA to seek proper irrigation management; the results displayed that a suitable irrigation amount of 720 mm and the ratio of organic-inorganic application of 50% organic fertilizer + 50% inorganic fertilizer is recommended.

Optimal combination of potassium fertilizer and drip irrigation for

Objective To explore the combination of water and potassium for optimized yield, quality, and production efficiency of potato under drip fertigation conditions in northern Shaanxi Province.

Optimal Water Usage for Applying One Pound of Potassium Fulvate in

Grey relational analysis (GRA) based on Game theory was used to evaluate the combined application of water and potassium and identify the optimal irrigation and potassium application regime.

Study on the Effects of Different Organic Water

Four organic water-soluble fertilizers—a potassium fulvic acid fertilizer (T1), a humic acid fertilizer (T2), a chitin-seaweed extract fertilizer (T3), and a compound organic fertilizer...

Effects of a novel fulvic acid

Under W2 irrigation, the W2F2 treatment achieved optimal performance, with plant height, aboveground dry weight, SPAD, and tuber yield increasing by 56.67%, 71.24%, 21.69%, and 121.29%, respectively, compared to CK.

Effects of a novel fulvic acid

Three irrigation regimes were applied: conventional irrigation (W1: 4582.5 m3·ha-1), 15% deficit irrigation (W2: 3865.5 m3·ha-1), and 30% deficit irrigation (W3: 3165 m3·ha-1).

Potassium fulvic acid (PFA) is an organic fertilizer rich in essential nutrients such as nitrogen, phosphorus, and potassium, as well as organic matter and microbial-active substances. In agricultural production, the rational use of PFA can effectively enhance soil fertility, promote crop growth, and improve yield and quality.

1. Main Components of Potassium Fulvic Acid

PFA primarily consists of humic acid, fulvic acid, and potassium ions. Humic acid is a complex organic compound with high biological activity, capable of improving soil structure and increasing organic matter content. Fulvic acid, a fraction of humic acid, exhibits strong redox properties and adsorption capacity, facilitating nutrient uptake by plants. Potassium ions are essential for plant growth, playing critical roles in regulating water balance and promoting photosynthesis.

2. Mechanism of Action

PFA exerts its effects through the following pathways:

• Soil Amendment: By increasing organic matter and microbial activity, PFA enhances soil water-and-nutrient retention, aeration, and permeability, thereby improving soil structure.
• Nutrient Absorption: Organic matter in PFA provides abundant nutrients for plants, while its adsorption capabilities help retain soil nutrients, reducing loss.
• Plant Growth Regulation: Fulvic acid stimulates root development and boosts nutrient absorption efficiency.
• Yield and Quality Improvement: By optimizing soil conditions and photosynthetic efficiency, PFA promotes crop growth, leading to higher yields and better quality.

3. Application Rates of Potassium Fulvic Acid

The appropriate application rate depends on crop requirements and soil conditions. Generally, PFA usage ranges from 5–10 kg per mu (approx. 0.5–1 kg/ha), adjusted as needed:

• Fruit Trees and Vegetables: Higher nutrient demand; recommend 10–15 kg/mu.
• Grain Crops: Lower nutrient demand; recommend 5–10 kg/mu.

4. Application Methods

PFA can be applied via:

• Basal Application: Evenly spread PFA on the soil surface, then deeply plow to integrate it with the soil.
• Topdressing: Apply during the crop growth period based on nutritional needs.
• Foliar Spraying: Dilute PFA and spray onto leaves to enhance growth and yield.

5. Precautions

• Avoid Overapplication: Excessive use may lead to soil salinization and reduced soil quality.
• Timing: Apply during early growth stages or peak periods for optimal effectiveness.
• Combine with Other Fertilizers: Pair PFA with organic fertilizers (e.g., chicken/cow manure) to improve nutrient utilization.

PFA is a highly efficient and eco-friendly organic fertilizer. By improving soil, enhancing nutrient absorption, and regulating plant growth, it significantly contributes to agricultural productivity. To maximize benefits, application rates should align with crop needs and soil conditions, avoiding overuse and selecting optimal timing. Scientific use of PFA promotes sustainable agriculture while boosting crop yield and quality.