Recently, some farmers asked whether leonardite powder can be used directly as fertilizer or soil amendment. Jingfeng Humic Acid has been studying mineral humic acid for many years. We will share some technicals in order to bring some help to farmers who want to buy leonardite.
What is leonardite?
Leonardite mainly refers to shallow-buried coal, which has a higher probability of contact with the external environment. After this long-term contact with weather phenomena such as rain, snow, and frost, a series of physical and chemical changes occur. Leading to endogenous A metamorphic coal with a large amount of humic acid.
Can leonardite powder be used directly as fertilizer?
Leonardite powder can not only provide sufficient organic carbon nutrition for the soil, but will also be broken down by soil microorganisms into small molecule fulvic acid. Fulvic acid not only inactivates Cd 2+ in the topsoil and reduces the absorption of crops, but also can move down with Cd 2+ in the topsoil and fix it in the subsoil.
So that leonardite can be used as soil amendment. It has a very good effect in the treatment of acid soil heavy metal pollution. Therefore, humic acid can also improve the physical, chemical, and biological properties of the soil. It does not cause decomposition of organic matter and soil compaction like the application of lime. Moreover, the field application process of leonardite humic acid is safer and does not burn operators.
When we buy leonardite fertilizer, we should know some leonardite fertilizer producing process. Here we will show you the two treatments of leonardite powder fertilizer.
① Simplified processing
The leonardite is treated by fertilizer into leonardite-based fertilizer. The method is to subject the leonardite to aerobic and anaerobic two-stage treatment. Biologically active bacteria and other auxiliary materials are added during the treatment. The basic characteristics are porous solids and added free humic acid active substance. Most of these fertilizer are insoluble in water, we can buy these leonardite base fertilizer for base fertilizer to increase soil carbon source.
② Advanced processing
That is, the leonardite is activated to transform the insoluble state into a soluble state. It mainly extracts humic acid from leonardite. Dehumidifies humic acid, Improves the quality of humic acid, and extracts and separates humic acid components. The activation methods include physical activation, chemical oxidation, graft modification, and microbial activation. Generally speaking, the drum activation method using potassium hydroxide activator has a good activation effect on leonardite and has the highest benefits. Most of these fertilizer are soluble in water, we can buy these leonardite base fertilizer for liquid fertilizer to drip or spray.
The role of leonardite based fertilizer
① Improve soil structure: Leonardite based fertilizer can promote the formation of soil aggregate structure, be a soil amendment, adjust soil water, fertilizer, gas, heat and other conditions. increase soil exchange capacity, achieve acid-base balance, and improve soil water and fertilizer capacity. Promote soil microbial activity.
②Improving soil nutrition: Leonardite is an important part of the carbon pool in the natural ecosystem. It contains a large amount of humic acid and a variety of oxygen-containing active functional groups, which can activate mineral elements and increase the availability.
③ Enhance the plant’s resistance to stress: Improve the plant’s resistance to disease and stress, and activate the inherent potential of the plant.
④ Increase soil temperature: Dissolving coal in water will generate a certain amount of heat of dissolution. In addition, leonardite based fertilizers are thermal fertilizers, and their activation and heating time is longer, which is conducive to the improvement of soil temperature.
Leonardite is rich in organic matter such as humic acid and is a valuable resource for the production of biological organic fertilizer. With the large-scale use of chemical fertilizers and pesticides, soil structure is destroyed. Pests and diseases are increased. Salinization area is expanded. And the quality of agricultural products is becoming more and more obvious. Fully develop and use large quantities of leonardite in Shanxi, Xinjiang and other places. Coal-based fertilizers are conducive to promoting soil improvement. And creating suitable growth conditions for most crops has far-reaching implications for improving crop quality and yield.