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NPK compound fertilizer contents

Potassium dihydrogen phosphate

Potassium dihydrogen phosphate is a kind of high concentration phosphorus potassium binary compound fertilizer, pure white or grayish white crystal, nutrient is 0-52-34, small hygroscopicity, good physical properties, soluble in water, water solution ph3-4, expensive.

Potassium dihydrogen phosphate is suitable for seed soaking, seed dressing and topdressing. The soaking concentration was 0.2% and the soaking time was 12 hours. Soybean and wheat were soaked in 30kg and 50kg solution, respectively. Seed dressing is usually sprayed with 1% concentration and seed mixed on the same day. The spraying concentration was 0.2% – 0.5%, and 50kg-75kg solution was used every 667m2. Choose to spray the leaves on the ground on a sunny afternoon without dripping. Wheat at jointing booting stage and cotton before and after flowering were sprayed three times. Spraying 0.5% potassium dihydrogen phosphate solution during fruit expansion and coloring has a good effect on improving product quality.

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Potassium nitrate is usually called pyronitrate. It is recrystallized from sodium nitrate and potassium chloride or extracted from nitroso. Its molecular formula is KNO3. It contains 13% N and 46% K2O. Pure potassium nitrate is white crystal, crude product is slightly yellow, hygroscopic, soluble in water, chemical neutral, physiological neutral fertilizer. It is easy to explode at high temperature and belongs to flammable and explosive substances.

It is suitable for dry land, generally 5-10 kg / 667 m2. It has a good effect on potato, tobacco, beet, grape, sweet potato and other crops that prefer potassium rather than chlorine frost. It has a good response in legume crops. If it is used for other crops, it should be combined with element nitrogen fertilizer to improve fertilizer efficiency. Potassium nitrate can also be used as root topdressing, and the suitable concentration is 0.6% – 1%. In arid areas, it can also be applied with organic fertilizer, the dosage is about 10kg / 667m2.
As the N: K2O ratio of potassium nitrate is 1:3.5, the content of potassium is higher, so the calculation of fertilizer should be based on the content of potassium.

NPK compound fertilizer application tips

NPK compound fertilizer contains two or more kinds of macroelements, which can provide rich nutrition for the growth and development of soil and plants. What should be paid attention to when applying NPK compound fertilizer?

There are different concentrations of compound fertilizer, we should pay attention to choose the appropriate concentration. At present, most compound fertilizers are distributed according to the average nutrient status of soil types and the proportion of fertilizer required by crops in a certain area. There are high, medium and low concentration compound fertilizers on the market.

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Generally, the low concentration of total nutrients is between 25% ~ 30%, the medium concentration is between 30% ~ 40%, and the high concentration is more than 40%. And crops. Generally speaking, high concentration compound fertilizer is used for economic crops with good quality, less residue and high utilization rate. The concentration of compound fertilizer is high. Avoid direct contact between seeds and fertilizer. The nutrient content of compound fertilizer is high. If the seeds or seedling roots are directly contacted, the emergence of seedlings will be affected, and even the roots will be burnt. When sowing, seeds should be mixed with acupoints, and compound fertilizer should be applied in strips with an interval of 5-10 cm.

NPK Drum Granulation Line

NPK Drum Granulation Line

Matters needing attention in application of NPK compound fertilizer

It is necessary to pay attention to the nutrient composition of compound fertilizer with different proportion of raw materials. Different brands and concentrations of compound fertilizer use different raw materials, which should be selected and used according to the types of soil and crops. The compound fertilizer containing nitrate is not suitable for leaf vegetables and paddy fields. It is not suitable to use compound fertilizer containing ammonium ion, potassium chloride or chloride ion in saline alkali soil, potassium sulfate in crops or saline alkali soil, and potassium sulfate in paddy field and acid soil, otherwise it will reduce fertility and even poison crops.

The compound fertilizer containing two or more kinds of large elements is easy to volatilize or lose with the rain, and the phosphorus and potassium are fixed by the soil, especially the mobility of phosphorus in the soil is small, and it is not easy to be absorbed. The crop root system is on the surface, which is not conducive to deep root system. The drought condition in the fertilizer can not be dissolved, and it is worse in the development, so the compound fertilizer should go deep into the soil.

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How to make the fertilizer without caking?

1. The moisture content and packaging temperature of fertilizer can be reduced by heating the dryer, cooling the dehumidifier and installing air conditioner, so as to make the moisture content of fertilizer lower than 0.6%, prolong the cooling time of fertilizer and reduce the packaging temperature.
2. Adding anti caking agent into the raw material to reduce the physical and chemical reaction between particles.
3. The uniformity of fertilizer particles can be further improved by improving the screening system.
4. Reduce the storage height and pressure of fertilizer.

How does the dealer do it?

1. Reduce the temperature and humidity of the warehouse, put the fertilizer warehouse in a cool and dry place, ensure no water leakage on the roof and no water accumulation on the ground, set fans in the warehouse, and cool and dehumidify if necessary.

New Type Organic Fertilizer Production Line

New Type Organic Fertilizer Production Line

2. After a period of time, the fertilizer is often turned, especially the fertilizer with high nutrient content, which is easy to caking after a long time, so we should pay more attention to turning the fertilizer frequently.

3. The fertilizers easy to produce chemical reaction shall be stacked separately to prevent chemical reaction caking.
4. Reduce the height of compost with certain machines, reduce the pressure between particles.

5. Avoid blind ordering, reduce inventory pressure, prevent fertilizer accumulation time is too long caking.
6. Select products from regular manufacturers to prevent uneven granulation and agglomeration.

Now, I would like to introduce the production line of roller granulator to you

Features of production line:

1. The roller granulator has no drying process, normal temperature granulation, one-time molding, less investment, quick effect and good economic benefit.
2. Compound fertilizer roller extrusion granulator has the advantages of small power, reliable operation, no waste discharge, stable operation, convenient maintenance, reasonable process layout, advanced process and low production cost.
3. Roller granulator can be widely used in raw materials, compound fertilizer, medicine, chemical fertilizer, feed, coal granulation. Metallurgical and other raw materials can produce various concentrations and types of compound fertilizers (including organic fertilizer, inorganic fertilizer, bio organic fertilizer, magnetic fertilizer, etc.).
4. Roller granulator, especially raw materials such as carbonated soil, ammonium sulfate and compound fertilizer, fills the gap in China and is at the leading level in China. It is a national environmental protection technology promotion project.

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