Humic acid water soluble fertilizer is a common fertilizer. When humic acid-containing water-soluble fertilizer is used as foliar fertilizer, it can be applied during the whole growth period of the crop, which not only can promote root growth, improve crop stress resistance, but also increase yield and improve quality. However, if you want to achieve better results, the fertilization period should be determined in combination with the regional environment and the growth characteristics of the crop. When is the humic acid foliar fertilizer applied? Let me introduce the application techniques of humic acid foliar fertilizer.
When is the application of humic acid foliar fertilizer?
1. When crops are deficient
When the crop is deficient, the physiology and metabolism of the plant have been greatly affected. At this time, the humic acid foliar fertilizer is sprayed, and the humic acid and chelating properties are utilized to activate iron, manganese, zinc and copper. Such as metal cations, synergistic fertilizers, and the promotion of nutrient absorption, can quickly alleviate the symptoms of deficiency and restore normal development.
2. When the soil pH is out of balance
Soil pH (pH) is too high and too low is not conducive to crop growth and development. When the soil pH is <5.0 or pH>9.0, the root activity of the crop is reduced, and the ability to absorb nutrients is poor, which is easy to cause deficiency. Acidic soils are prone to magnesium, calcium, potassium, boron, molybdenum and other elements; alkaline soils are prone to iron deficiency, zinc, manganese, phosphorus and other elements. The use of foliar sprayed humic acid-soluble fertilizer can greatly alleviate the nutrient deficiency caused by weak root absorption function, maintain the body function and prevent premature senescence of plants.
3. When the soil is dry or leeches
When the soil is dry or leeches, the roots of the crop are weakened, and physiological obstacles occur, resulting in decreased absorption capacity. Spraying humic acid foliar fertilizer can inhibit transpiration, reduce water loss, improve drought resistance, promote root development, restore root activity and improve root absorption.
Application techniques of humic acid foliar fertilizer
4. When the soil is saline or salinized
Under salt stress, spraying humic acid water soluble fertilizer reduces the salt damage by reducing the ratio of sodium ions in the leaves to various cations such as potassium, calcium and magnesium.
5. When crops are infected with pests and diseases
When pests and diseases occur in the roots or aboveground parts of the crops, due to the reduced absorption or transport capacity of the roots, combined with pesticide control and humic acid foliar fertilizer, it can not only improve the control effect of pesticides, but also supplement the deficiency of nutrients, so that the crops can quickly return to normal growth. development.
6. When the crop is frozen, dry hot air
acid foliar fertilizer can significantly enhance plant resistance and reduce the damage of freezing damage. When dry hot wind is encountered, the water dispersion of the crop is not accelerated, and the foliar application of humic acid foliar fertilizer can increase the concentration of the cytosol of the crop, prevent the water from being dispersed, and enhance the ability to resist dry hot wind.
7. When the crop has physiological obstacles or weakness
When the crop is caused by excessive application of nitrogen fertilizer, it is not easy to flower or fall into the fruit; when the plant load is too large, affecting normal growth and development; in the late growth stage of the crop, when the plant is weak and the root absorption capacity is significantly reduced, the leaf surface is sprayed with rot Acid foliar fertilizer can quickly supplement humic acid and nutrient elements, restore plant growth, and coordinate the development of vegetative growth and reproductive growth, which is conducive to obtaining higher yield and improving the quality of agricultural products.
The above is the introduction of some humic acid foliar application techniques. After you understand it, you can rationally use and apply humic acid foliar fertilizer according to the actual planting situation.