Use of humic acid fertilizers and precautions

Humic acid fertilizer is a new type of fertilizer containing humic acids. Its main types are humic acids, nitrohumic acids and purified humic acid products. The former two are mostly made of humic acid compound fertilizers with nitrogen, phosphorus, potassium and trace elements, which are mainly used as base fertilizers. Purified humic acid is mainly used for watering or spraying crops as a growth regulator. At the same time can also be used as soaking, can increase the germination rate and cultivate strong seedlings.

1. Usage. 1 basal fat. Each mus of 0.02% to 0.05% aqueous solution containing humic acid 300 to 400 kg mixed with farm fertilizer, or open ditch, digging base facilities. Paddy field can be applied in combination with site irrigation.

2 top dressing. Seedling stage and heading stage, with 0.01% to 0.1% aqueous solution containing 250g of humic acid per acre, watered in the vicinity of the root (do not touch the root system), rice field application of sodium humate or potassium humate, can be applied with water irrigation Or splash pouring, raising seedlings, strong ears, and promote growth and development.

3 outside spray. From the late flowering stage to the early stage of grouting, the roots were sprayed two or three times, spraying 0.01-0.05% aqueous solution of humic acid 50-75 kg per mu, and the grain was full, the grain weight was increased, and the emptying rate was reduced. It is better to spray at 2-6 pm.

4 soaking. The seed is soaked in an aqueous solution containing 0.01% to 0.05% of humic acid. The seeds of vegetables, wheat, etc. are immersed for 5 to 10 hours, and rice and cotton are soaked for more than 24 hours. Can increase the germination rate, early emergence, enhance seedling rooting ability.

5 roots, dip inserts. Transplant crops such as rice, sweet potato, and vegetables are soaked with 0.05% to 0.1% sodium humate and potassium humate before transplanting for several hours, or rooted when transplanted, and soaked with fruit cuttings. Rooting fast, increasing secondary roots, shortening the period of easing, and improving the survival rate.

2. Note. Humic acid fertilizers are used as base fertilizers and seed fertilizers are better than top dressings. Concentrated application is better than spreading, and deep application is better than shallow application. At the same time, humic fertilizer can not completely replace inorganic fertilizers and farmyard fertilizers. It must be used together with chemical fertilizers and organic fertilizers, especially when used in combination with phosphate fertilizers.

Different kinds of rot and fertilizer materials have different input ratios, different manufacturing methods, and the nutrient content varies greatly. It is necessary to grasp the appropriate concentration at the time of application.

Potassium and sodium humate are hormonal fertilizers, and attention should be paid to the temperature. Cold weather after application is slow, and hot weather is quick. Normal temperatures need to be effective for more than 18 hours. If the temperature is higher than 38 °C, it will accelerate the respiration of crops and reduce dry matter accumulation, resulting in reduced production, should stop the application or reduce the number of applications and dosage.

The ammonium humate fertilizer can only fully exert the fertilizer effect if there is sufficient soil moisture and good irrigation conditions.

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