What is the role of humic acid fertilizer? How to use it correctly?
Humic acid fertilizer is made from natural resources such as peat, lignite and weathered coal containing humic acid, and combined with substances containing ammonium, sodium, potassium, calcium and magnesium to form a black solid (or liquid) fertilizer. For "black fertilizer." After applying fertilizers containing nutrients such as nitrogen, phosphorus and potassium to the soil, humic acid has a chelation and adsorption effect on various nutrients in the soil, which improves the utilization efficiency of nutrients and brings nutrient supply to the soil. It also provides soil active substances, which provide double nutrients for crop growth.
The advantages of this type of fertilizer have been fully demonstrated in the application of humic acid fertilizers. One is to loosen the soil and fertilize the soil. The second is to provide nutrients for crops, absorb nutrients such as ammonium ions and potassium ions, reduce nutrient loss, and improve fertilizer utilization. It is especially important for fertilizers such as ammonium bicarbonate and ammonia. The third is to enhance the activities of various enzymes in the crop and stimulate crop growth. The fourth is to promote the ability of microorganisms to reproduce and move, to stimulate microbes, to greatly improve the activity of fungi, bacteria and nitrogen-fixing bacteria, to promote the decomposition of organic matter, to accelerate the maturity of farmyard fertilizers, and to promote the release of quick-acting nutrients. According to many sources, humic acid is a mitigating agent and stabilizer for nitrogen fertilizer, a synergist for phosphate fertilizer, and a potentiating agent for potassium fertilizer.
It is a conditioning agent and an integrator for medium and trace elements, and has obvious synergistic effect on fertilizers. Afterwards, the crops will have improved resistance to drought, cold, salt and alkali, and after application, the disease resistance of various diseases of grain, cotton and vegetable crops will be significantly improved.
Humic acid fertilizers are broadly classified into two major categories: humic acid and fulvic acid. Humic acid fertilizer is made up of peat or peat combined with chemical fertilizer. The main products are ammonium humate, humic acid phosphorus, potassium humate, sodium humate, humic acid NPK compound fertilizer, and nitro humic acid ammonium and nitrate. Nitrogen compound fertilizers such as potassium humate. The fulvic acid fertilizer is divided into solid and liquid. The main products are yellow sulphate diamine iron, potassium fulvic acid, sodium fulvate, fulvic acid urea iron, zinc fulvic acid, fulvic acid compound fertilizer and fulvic acid. Trace elements, etc.
Humic acid fertilizer using methods.
In agricultural production, it is mainly used as base fertilizer, top dressing, seed dressing, root filling, drip irrigation or flushing with water. When using the base fertilizer, use 0.02%-0.05% aqueous solution per acre 300-400 kg, mix with the farmyard manure, or open the ditch, and the paddy field can be combined with the ground irrigation. In the crop seedling stage and heading stage, 250 kg of 0.01%-0.1% aqueous solution per acre is used to water the root system. Apply humate or potassium fulvic acid to the paddy fields, either by pouring or with water. Seed dressing with potassium fulvic acid, the amount of which is generally about 1% of the weight of the seed, and the seed is dried and then sown. Flushing or drip irrigation is generally 5-10 kg per acre, and it is better to mix with urea or other compound (mixed) fertilizer. Humic acid fertilizer can also be sprayed. Generally, after the crop is flowered to the initial stage of filling, 50-75 kg of 0.01%-0.05% aqueous solution per acre can be used to make the grain full, increase 1000-grain weight and reduce the openness. Spray time is appropriate in the evening.
The above is the introduction of the role and application method of humic acid fertilizer. After understanding, we can reasonably select and apply humic acid fertilizer according to the actual planting situation.