Application of humic acid-containing water-soluble fertilizer in agricultural production

Humic acid is a natural high molecular organic compound containing a plurality of active genes such as a carboxyl group, a phenolic hydroxyl group and a methoxy group in its molecule, thereby making it have a strong physiological activity. It can react with heavy metal ions in combination, substitution, complexation, chelation, etc. to modify it to produce various new substances (new products) with various beneficial properties. The humic acid-containing water-soluble fertilizer is a new type of fertilizer containing humic acid and a multifunctional fertilizer.

main effect

Stimulate crop growth. The stimulating effect of humic acid foliar fertilizer is mainly to promote seed germination, increase seed emergence rate, promote root growth, improve roots' ability to absorb water and nutrients, increase tillering or branching, and early maturity.

Improve soil physical and chemical properties, fertility and fertility. When humic acid fertilizer is used for soil application or soil application, it can also improve soil and improve fertilizer efficiency. Because the humic acid organic colloid in the humic acid fertilizer combines with the calcium ions in the soil to form a flocculent gel, the colloid is a good cementing material, which can cement the soil particles and increase the water-stable aggregate structure in the soil. Thereby improving the water, fertilizer, oxygen and heat of the soil.

Provide nutrients to crops. The fertilizer can absorb ammonium, potassium, calcium, magnesium, zinc ions and the like, and can form iron and aluminum complexes with free iron ions and aluminum ions in acidic soil, thereby reducing phosphorus fixation and improving Fertilizer utilization rate.

Promote the reproduction and activities of microorganisms. Humic acid has a stimulating effect on microorganisms, which enhances the activity of fungi, bacteria and nitrogen-fixing bacteria, promotes the decomposition of organic matter, accelerates the maturity of farmyard fertilizers, and promotes the release of quick-acting nutrients.

Usage of humic acid fertilizer

This fertilizer is mainly used as a base fertilizer. Purified humic acid is mainly used for watering or spraying crops as a growth regulator. It can also be used as a soaking seed to increase the germination rate.

base fertilizer. Use 0.02% ~ 0.05% aqueous solution per acre 300 ~ 400 kg mixed with farmyard manure, or ditch, pit pit foundation. Paddy fields can be combined with land preparation irrigation.

top dressing. At the seedling stage and heading stage, use 250kg of 0.01%~0.1% aqueous solution per acre, watering near the root system (do not touch the root system), and can be poured or poured with water to raise seedlings and strong ears to promote growth and development.

Spray outside the roots. Spray on the leaves two or three times, and spray at 2 to 6 in the afternoon. Spraying 50% to 75 kg of 0.01%-0.05% aqueous solution per acre can enhance the chlorophyll content, restore root activity, promote nutrient transfer to fruits and seeds, and improve product quality.

Soaking seeds. Soak the vegetable seeds with a 0.01% to 0.05% aqueous solution for 5 to 10 hours. It can increase the germination rate, early emergence and enhance the rooting ability of seedlings.

Roots, dip inserts. For transplanting crops such as sweet potato and vegetables, immerse the roots with 0.05%-0.1% sodium humate or potassium humate solution for several hours before transplanting, or roots when transplanting. Hair roots are fast, increase secondary roots, shorten the slowing period, and increase the survival rate.

Precautions

1. The effect of humic acid fertilizer varies depending on the type of crop. It is generally believed that the fertilizer effect is better on vegetable crops such as cabbage, radish and tomato, followed by root and tuber crops. It is also used for rapeseed, soybean, peanut and other crops, but it is relatively low in cereal crops. For the same crop, it should be applied in the early growth stage of the crop and during the vigorous growth period. At this time, the leaf surface sprayed with humic acid fertilizer can be quickly absorbed by the leaves.

2. Master the application concentration. Humic acid is similar to auxin in that it exhibits a low concentration promotion and a high concentration inhibition effect. The suitable application concentration in the early growth stage is 100 mg/L, while the concentration in the middle and late growth can be varied in the range of 100-500 mg/L.

3. Apply other fertilizers. Humic acid fertilizer contains quick-acting nutrients lower than chemical fertilizers, so it can not replace chemical fertilizers, but should be applied in combination with chemical fertilizers and farmyard manure.

4. Pay attention to the application temperature. Potassium humate and sodium are hormone-based fertilizers. Pay attention to the temperature. After the application, the cold effect will be slow, and the heat will be effective. The general temperature should be more than 18 hours. If the temperature is higher than 38 °C, it will accelerate the respiration of crops and reduce the accumulation of dry matter, resulting in reduced production, and should be stopped.