What are the components of humic substances?
Humic substances in soils and sediments can be divided into three main fractions: humic acids, fulvic acids, and humin.
What is the composition of humic acid?
A humic acid-like polymer, called polymerin (POL), was extracted from olive oil mill waste waters and prepared and characterized according to the procedure determined by Capasso et al. (2002). POL chemical composition is as follows: carbohydrates 52.40%, proteins 10.40%, melanin 26.14%, metals 11.06%.
What are humic like substances?
Humic-like substances (HULIS) are a complex group of relatively high molecular weight organic compounds which contribute considerably to the mass of organic carbon (OC) and influence the light-absorbing properties of aerosols.
What is humic substances in soil?
Humic substances (HS) are an operationally defined fraction of soil organic matter, and they represent the largest pool of recalcitrant organic carbon in the terrestrial environment. It has traditionally been thought that extractable HS consist of novel categories of cross-linked macromolecular structures.
What is fulvic and humic?
Humic acids are large molecules that function best in soil to provide an optimal growing environment. Fulvic acids are much smaller molecules that work well in both soil and foliar applications, where they transfer vital nutrients through the cell membrane of plants.
How are Humates made?
Humates are a natural result of the process of humification, in which organic matter is formed from the remains of plant and animal life over a period of thousands of years. When combined, organic materials create biochemical and chemical reactions, resulting in the creation of complex molecules.
What is non humic substances?
Non-humic organic molecules are released directly from cells of fresh residues, such as proteins, amino acids, sugars, and starches. This part of soil organic matter is the active, or easily decomposed, fraction.
What are non humic substances?
Non-humic substances: significance and function Non-humic organic molecules are released directly from cells of fresh residues, such as proteins, amino acids, sugars, and starches. This part of soil organic matter is the active, or easily decomposed, fraction.
What is humic and fulvic?
What is humic fertilizer?
Humic acid is a mixture of natural organic macromolecular compounds, which exists in all soils, plants and animals,and have been widely used in agricultural production in recent years due to their unique physiological functions. Adding a small amount of humus to an acre of soil can improve soil condition.
What minerals are in humic acid?
Humic acid, often referred to loosely as a “humic substance,” is an organic compound. It is a vital part of humus (the organic part of soil along with coal and peat)….Other nutrients that humic acid can help increase the absorption rate of include:
- Magnesium.
- Calcium.
- Zinc.
- Manganese.
What is the pH of fulvic acid?
5.83
Its main physical and chemical properties included available P (2.4 mg kg-1), pH value (5.83), bulk density (1.34 g cm-3), moisture content (280 g kg-1), cation exchange capacity (11 cmol kg-1), organic matter (8.9 g kg-1), bacteria (1.58×107 g-1), fungus (0.89×106 g-1), actinomyces (0.79×106 g-1) and exchangeable Al ( …
When to apply humic acid?
Agitate the mixture before application. Use the solution within 24 hours, using your usual methods for applying fertilizer. It is best to begin application during planting or prior to germination. You can reapply humic acid liquid fertilizer once every 6 weeks or so.
What are aqueous humic substances?
Humic substances are very important components of soil that affect physical and chemical properties and improve soil fertility. In aqueous systems, like rivers, about 50% of the dissolved organic materials are HS that affect pH and alkalinity.
What does humic acid do?
Humic acid is often referred to as a natural plant-growth stimulator that increases plant metabolism and nutrient intake and improves plant development. These are pretty tall claims for any natural supplement; however, humic acid is one of the major components of organic matter found within nature’s most fertile soils.
What is Humate fertilizer?
Potassium humate is a highly effective organic fertilizer, because humic acid is a high active agent, can increase available potassium in soil, reduce the loss and fixation of potassium, increase crop potassium absorption and utilization,also can hold the nitrogen and slow release,unclock…