1、Incorporation of humic

In fact, many products containing diverse concentrations of humic substances, mainly humic and fulvic acids, are marketed as plant growth enhancers all over the world.

2、Humic and fulvic acids as biostimulants in horticulture

Soil scientists define humic acids (HA) as humus materials that are soluble in aqueous alkaline solutions but precipitate when the pH is adjusted to 1–2. In contrast, fulvic acids (FA) remain in solution after the aqueous alkaline extracts are acidified.

3、Effect of humic acid and fulvic acid based liquid and foliar fertilizers on the yield of wheat crop

An organic-mineral liquid fertigation fertilizer containing humic acid, nitrogen (N)–phosphorus (P)–potassium (K), zinc (Zn), sulfur (S), manganese (Mn) and a liquid foliar fertilizer consisting of fulvic acid and gibberellic acids were formulated and applied to wheat.

4、Particle and structure characterization of fulvic acids from agricultural soils

Humic substances can be operationally defined into three fractions according to their solubility in water at various pH values, e.g., fulvic acid (soluble at all pH values), humic acid (soluble in alkaline media and insoluble at pH 1.0), and humins (insoluble at all pH values).

5、Does P

Fulvic acids have lower contents of C and N and higher O contents than do corresponding HAs (reviewed by Rice and Maccarthy (1991)). The elemental compositions of FAs from soil sources differed from those from freshwater by their greater H/C ratios (Rice and Maccarthy, 1991).

Seaweed Liquid Fertilizers: A Novel Strategy for the Biofortification of VegeTables and Crops

From the 100% seaweed extract, different concentrations (ranging from 25% to 100%) of seaweed liquid fertilizer (SLF) were prepared using distilled water. Since the seaweed liquid fertilizer contained rich nutrients and more prone to contamination, they were stored at 4 °C.

Isolation and Characterization of Chinese Standard Fulvic Acid Sub

Humic substances can be operationally defined into fulvic acid (FA; soluble at all pH values), humic acid (HA; soluble in alkaline media and insoluble at pH 1.0) and humin (insoluble at all...

Drought

The drought-resisting and boll-protecting water-soluble fertilizer is preparedby mixing urea, fulvic acid, magnesium sulfate, a pretreatment material, a rooting agent and colloidal particles, wherein the pretreatment material is prepared by mixing and grinding mushroom bran, polyvinyl alcohol, potassium sulfate and monopotassium phosphate; the ...

Quantification of Humic and Fulvic Acids, Macro

This study aimed to evaluate quantitatively the humic and fulvic fraction by size-exclusion liquid chromatography and the metal content by atomic absorption spectrometry. The chromatographic method used was efficient for humic and fulvic acids quantitation.

Water solubility enhancement of some organic pollutants and pesticides by dissolved humic and fulvic acids

Water solubility enhancement of some organic pollutants and pesticides by dissolved humic and fulvic acids | Environmental Science & Technology

Fulvic acid granular water-soluble fertilizers are formulations containing fulvic acid, which enhance soil nutrient utilization rates, improve soil structure, and promote crop growth. There are numerous types of fulvic acid granular water-soluble fertilizers, with the following being common examples:

1. Fulvic Acid Potassium Granular Water-Soluble Fertilizer: This fertilizer contains a high concentration of fulvic acid and potassium, providing essential potassium nutrition for plants while supporting their growth and development.

2. Fulvic Acid Phosphorus Granular Water-Soluble Fertilizer: Rich in fulvic acid and phosphorus, this fertilizer supplies plants with critical phosphorus nutrients and aids in healthy growth.

3. Fulvic Acid Nitrogen Granular Water-Soluble Fertilizer: Formulated with fulvic acid and nitrogen, it delivers essential nitrogen to plants while promoting their development.

4. Fulvic Acid Magnesium Granular Water-Soluble Fertilizer: Combines fulvic acid with magnesium to provide plants with magnesium nutrition and support growth.

5. Fulvic Acid Sulfur Granular Water-Soluble Fertilizer: Contains fulvic acid and sulfur, offering plants sulfur nutrients and fostering healthy growth.

6. Fulvic Acid Iron Granular Water-Soluble Fertilizer: Supplies iron alongside fulvic acid, addressing plants’ iron requirements and enhancing growth.

7. Fulvic Acid Zinc Granular Water-Soluble Fertilizer: Provides zinc nutrition through fulvic acid and zinc, benefiting plant development.

8. Fulvic Acid Manganese Granular Water-Soluble Fertilizer: Combines fulvic acid with manganese to meet plants’ manganese needs and promote growth.

9. Fulvic Acid Copper Granular Water-Soluble Fertilizer: Delivers copper and fulvic acid, supplying essential copper nutrients to plants.

10. Fulvic Acid Aluminum Granular Water-Soluble Fertilizer: Contains fulvic acid and aluminum, offering aluminum nutrition to plants while supporting growth.

The selection of these fulvic acid granular water-soluble fertilizers depends on specific plant requirements and soil conditions. Appropriate choices should be made based on individual needs. Additionally, when using fulvic acid granular water-soluble fertilizers, it is important to apply them in proper amounts to avoid issues such as excessive soil salinity.

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