When the water-soluble fertilizer containing humic acid is used as foliar fertilizer material, it can be applied in the whole crop breeding period, which can promote root growth, improve crop resistance, improve quality and improve quality, but the application effect will not be as obvious as spraying when diseases and insect pests occur. The fertilization period should be determined in combination with the regional environment and the characteristics of crop growth.

1. When crops lack nutrients, the physiology and metabolism of plants are greatly affected. At this time spraying humic acid foliar fertilizer, the use of humic acid chelating properties, activation of iron, manganese, zinc, copper and other metal cations, improve fertilizer efficiency, promote nutrient absorption, can quickly alleviate the deficiency symptoms, restore normal development.

2, soil ph value is too high or too low is not conducive to crop growth and development. When the soil ph< 5.0 or ph> 9.0, crop root activity decreased, poor ability to absorb nutrients, easy to cause deficiency disease. Acid soil is prone to magnesium, calcium, potassium, boron, molybdenum, etc., alkaline soil is prone to iron, zinc, manganese, phosphorus, etc. The application of foliar fertilizer containing humic acid can alleviate the nutrient deficiency caused by the weak absorption function of the root system and maintain the function of the body.

3. When the soil is dry or waterlogged, the crop root system is weak and physiological obstacles appear, resulting in a decrease in absorption capacity. Spraying humic acid foliar fertilizer can inhibit transpiration, reduce water loss, improve drought resistance, promote root development and restore root activity.

4. When different salinity or salinization occurs in the soil environment, under salt stress, spraying biological humic acid water soluble fertilizer can reduce salt damage by reducing the ratio of sodium ions to various cations such as potassium, calcium and magnesium in crop leaves.

5. When diseases and insect pests occur in crop roots or aboveground parts, due to the reduction of root absorption or transport capacity, combined with pesticide control and humic acid foliar fertilizer, it can not only improve the pesticide control effect, but also supplement the shortage of nutrient elements, so that crops can quickly return to normal growth and development.

6. Crops are damaged by frost. Crops encounter frost damage when drying hot air. Spraying rotten vegetable acid foliar fertilizer on foliar surface can significantly enhance plant frost resistance and reduce frost damage. When encountering dry hot air, crop moisture dispersion loss is accelerated. Foliar spraying of plant acid foliar fertilizer can increase the concentration of crop cell type, prevent water dispersion loss, and enhance the ability to withstand dry and hot air.

7. When the crop has some physiological dysfunction or weakness, the crop is not easy to bloom due to excessive nitrogen fertilizer application, resulting in excessive growth or falling flowers and fruits. When the plant load is too large, affecting the normal cell growth and development of the enterprise; In the late stage of crop growth, when the plant is weak and the root absorption capacity is obviously decreased, humic acid and nutrient elements can be quickly supplemented by spraying humic acid fertilizer, restoring plant growth is conducive to obtaining a higher yield and improving the quality of agricultural products.

and above are the relevant contents introduced to you when the humic acid foliar fertilizer is applied better, I hope it will be helpful to you!