When humic acid-containing water-soluble fertilizer is used as foliar fertilizer, it can be applied during the whole growth period of crops, which can promote root growth, improve crop resistance, increase yield, and improve quality, but the application effect will not be the same as spraying pesticides when insect pests appear Quick effect and obvious. The fertilization period should be determined by combining the regional environment with the growth characteristics of the crop.
When crop deficiency occurs. When crop deficiency occurs, the physiology and metabolism of the plant have been greatly affected. At this time, humic acid foliar fertilizer is sprayed, and the humic acid's complexing and chelating properties are used to activate iron, manganese, zinc, and copper. Such as metal cations, synergistic fertilizers, and promote nutrient absorption, can quickly alleviate the symptoms of deficiencies and restore normal development.
When soil pH is unbalanced. Too high or low soil pH is not conducive to crop growth. When the soil pH is 9.0, the vitality of the crop root system is reduced, the ability to absorb nutrients is poor, and it is easy to cause deficiencies. Acidic soils are prone to elements such as magnesium, calcium, potassium, boron, and molybdenum; alkaline soils are prone to elements such as iron, zinc, manganese, and phosphorus. Foliar spraying of humic acid-containing water-soluble fertilizer can greatly alleviate the nutritional deficiency of crops due to poor root absorption function, maintain body function, and prevent premature plant senescence.
When soil is dry or waterlogged. When the soil is dry or waterlogged, the crop root system is weakened, physiological obstacles occur, and absorption capacity is reduced. Spraying humic acid foliar fertilizer can inhibit transpiration, reduce water dispersion loss, improve drought resistance; promote root development, restore root vitality, and improve root absorption.
When soil is saline or salinized. Under salt stress, spraying humic acid water-soluble fertilizers can reduce salt damage by reducing the ratio of sodium ions to various cations such as potassium, calcium, and magnesium in crop leaves.
When crop pests occur. When diseases and insect pests occur on the roots or above ground of crops, due to the reduced absorption or transduction capacity of the roots, combined with pesticide control, combined with humic acid foliar fertilizer, can not only improve the control effect of pesticides, but also supplement the deficiency of nutrients, so that the crops can quickly resume normal growth. development.
When crops are damaged by frost and dry hot wind. When crops are exposed to freezing damage, foliar spraying of humic acid foliar fertilizer can significantly enhance plant resistance and reduce freezing damage. When encountering dry and hot wind, the loss of crop water dispersion is accelerated, and foliar spraying of humic acid foliar fertilizer can increase the concentration of crop cell liquid, prevent water loss, and enhance the ability to resist dry and hot wind.
When crops are physically impaired or weakened. When crops are excessively long due to excessive application of nitrogen fertilizer, it is not easy to flower or bear fruit or flowers and fruits; when the plant load is too large, which affects normal growth and development; in the later stages of crop growth, the plants are weakened, and the root absorption capacity is significantly reduced. Acid foliar fertilizer can quickly add humic acid and nutrient elements, restore plant growth, coordinate plant vegetative growth and reproductive growth, help to obtain higher yields, and improve the quality of agricultural products.
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