Humic acid is a kind of organic matter caused and accumulated by animal and plant remains (mainly plant remains) through microbial decomposition and transformation and a series of geochemical processes. Its total volume is staggering, trillions of tons. It can be found in rivers, lakes, seas, soil, coal mines and most of the earth’s surface. Because of its widespread existence, it also has a great impact on the earth, involving carbon cycle, mineral migration and accumulation, soil fertility, ecological balance and so on. The total amount of humic acid in soil is the largest, but the average content is less than 1%. The total amount in brackish water is not small, but the concentration is lower. The most promising humic acid resources for development and utilization are some low calorific value coal, such as peat, lignite and weathered coal. Among them, the content of humic acid is 10-80%. Humic acid fertilizer is a kind of organic fertilizer. er. Natural humic acid is formed by decomposition of plant residues. It widely exists in soil, river mud and shallow weathered coal, peat and lignite. It contains carbon, hydrogen, oxygen, nitrogen and other elements. It has certain fertilizer, but most of it is difficult to dissolve in water. If it is combined with potassium, sodium, ammonium and other substances, dried in the sun and ammoniated, it is easy to be absorbed by plants as nutrients. Neutralizing humic acid can be made into humic acid ammonium fertilizer, which has the functions of increasing fertilizer efficiency, improving soil, stimulating crop growth and improving the quality of agricultural products; NITRO humic acid can be used as acid regulator for rice seedling raising; Magnesium humate, zinc humate and urea iron humate have good effects on supplementing magnesium deficiency in soil, zinc deficiency in corn and iron deficiency in fruit trees, respectively; Humic acid mixed with herbicides such as herbicide and atrazine can improve efficacy and inhibit residual toxicity; Sodium humate is effective in the treatment of apple tree rot.
Function of humic acid fertilizer
Can improve nitrogen use efficiency:
Nitrogen fertilizer is an indispensable fertilizer for plant growth, but it is rarely used by plants. The aromatic core, hydroxyl, carboxyl and other acidic functional groups in humic acid can react with nitrogen to form stable new ion groups. These complexes remain in the soil for a long time and can be slowly absorbed by plants.
Synergistic effect on phosphate fertilizer:
Generally, after phosphorus fertilizer is applied to the soil, phosphorus will be fixed by metal ions in the soil, which will lead to phosphorus becoming delayed or ineffective phosphorus. Acidic functional groups such as aromatic nucleus, hydroxyl group and carboxyl group in humic acid can react with phosphorus to make it soluble phosphorus, which enhances the activity of phosphorus.
It has synergistic effect on potassium fertilizer:
The functional groups in humic acid can store potassium ions, which can not only prevent potassium ions from losing with water, but also prevent viscous soil from fixing potassium ions, so as to improve the utilization rate of potassium fertilizer.
It has the function of water and fertilizer conservation:
Humic acid and calcium in soil can form a gel, which can cement the soil together, thus increasing the gap between the soil and improving the ability of soil water conservation and fertilizer conservation.
In agriculture, humic acid fertilizer made by combining nitrogen, phosphorus, potassium and other elements (for example, ammonium phytate fertilizer can be made by neutralizing humic acid with ammonia), which has the functions of increasing fertilizer efficiency, improving soil, stimulating crop growth and improving the quality of agricultural products; NITROHUMIC acid can be used as acid regulator for rice seedling raising;
Magnesium humate, zinc humate and urea iron humate have good effects on supplementing magnesium deficiency in soil, zinc deficiency in corn and iron deficiency in fruit trees, respectively; Humic acid mixed with herbicides such as herbicide and atrazine can improve efficacy and inhibit residual toxicity; Sodium humate is effective in the treatment of apple tree rot.
Post time: Dec-06-2021