Compound fertilizer VS controlled release fertilizer VS flush fertilizer

What is compound fertilizer?

Compound fertilizer has the advantages of high nutrient content, few by-products and good physical properties. It plays a very important role in balanced fertilization, improving fertilizer utilization and promoting high and stable crop yields. But it also has some disadvantages, such as its nutrient ratio is always fixed, while the types, quantities and ratios of nutrient elements required by different soils and different crops are diverse. Therefore, it is best to conduct a soil test before use to check the texture and nutritional status of the soil in the field. In addition, attention should be paid to the application in conjunction with unit fertilizers to obtain better results.

3 development Trend of Compound Fertilizer in 2024

1. multi-variety specialization

At present, the development of compound fertilizers has three major trends: The first is multi-variety specialization. Different crops have different special fertilizers, which are developed and produced based on the growth and development patterns of crops and the amount of fertilizer they absorb. When farmers choose compound fertilizers, they must choose corresponding special fertilizers according to different crops. If it is not used exclusively, it will violate the rules of crop fertilizer absorption, prevent the crop’s yield potential from being utilized, and cause a waste of certain nutrients.

2. multifunctional medicinal use

The second is multifunctional medicinal use. Combining pesticides and chemical fertilizers eliminates the need for chemical seed dressing procedures. One application can not only ensure the nutrients needed by crops but also prevent and control underground pests and seedling diseases, which can achieve multiple effects.

2. high concentration and long-term effect

The third is high concentration and long-term effect. With the development of agricultural production, high-concentration and long-lasting compound fertilizers are becoming more and more popular among farmers. The application of this type of fertilizer reduces the amount of fertilizer, facilitates farming, eliminates the need for top dressing, reduces labor, and improves fertilizer utilization. Efficiency, saving labor, effort and time, improving quality and efficiency.

How to use compound fertilizer correctly

Grasp the characteristics of compound fertilizer and apply it

• Compound fertilizer has long fertilizer effect and is suitable as base fertilizer. A large number of tests have shown that whether it is binary or ternary compound, it is better to base it. This is because compound fertilizers contain various nutrients such as nitrogen, phosphorus, and potassium. The crops are especially sensitive to phosphorus and potassium in the early stages, so phosphorus and potassium fertilizers are required to be applied early as base fertilizers.
• Controlled-release compound fertilizer uses coating, granulation and other processes during the production process. The fertilizer effect is slow and steady, decomposes more slowly than simple chemical fertilizers, has less nutrient leaching loss, and has a high utilization rate, making it suitable for use as base fertilizer. The general dosage per mu is 30 to 40 kilograms.
• Compound fertilizer should not be used as fertilizer in the seedling stage and in the middle and late stages to prevent excessive green growth.
• Compound fertilizers decompose slowly. For crops that use compound fertilizers as base fertilizers during sowing, quick-acting nitrogen fertilizers should be added in a timely manner during topdressing according to the fertilizer requirements of different crops to meet the nutritional needs of the crops.
• The concentration of compound fertilizers varies greatly, so attention should be paid to choosing the appropriate concentration. At present, most compound fertilizers are configured according to the average nutrient content of the soil type in a certain area and the fertilizer requirements of bulk crops. There are high, medium and low concentration series of compound fertilizers on the market. Generally, the low concentration is between 25% and 30% of the total nutrients, the medium concentration is between 30% and 40%, and the high concentration is above 40%.
• Depending on the region, soil, and crops, economical and efficient compound fertilizers must be selected. Generally, high-concentration compound fertilizers are used on cash crops, with good quality, less residue and high utilization rate.
• The concentration of compound fertilizer is high, so direct contact between seeds and fertilizer should be avoided, as it will affect seedling emergence or even burn seedlings and cause root rot. When sowing, the seeds should be about 5 to 10 centimeters away from the hole-applied or strip-applied compound fertilizers. Do not apply fertilizer directly in the same hole as the seeds to cause fertilizer damage.
• Compound fertilizers have different proportions of raw materials, so attention should be paid to the scope of use of nutrients. Different brands and different concentrations of compound fertilizers use different raw materials, and the production should be selected according to the soil type and crop type.
• Compound fertilizers containing nitrate roots should not be used on leafy vegetables and paddy fields. Compound fertilizers containing ammonium ions should not be used on saline-alkali soils. Compound fertilizers containing potassium chloride or chloride ions should not be used on chlorine-resistant crops or saline-alkali soils. Potassium sulfate compound fertilizer should not be applied in paddy fields and acidic soil. Otherwise, the fertilizer efficiency will be reduced and even the crops will be poisoned.
• Compound fertilizers contain two or more large amounts of elements. Ammonia is easily lost by volatilization or runoff by rainwater when applied on the surface. Phosphorus and potassium are easily fixed by the soil. Phosphorus, in particular, has low mobility in the soil and is not easily absorbed and utilized by crop roots when applied on the surface. It is also not conducive to the deep penetration of the root system. In case of drought, the fertilizer cannot be dissolved and the fertilizer effect is even worse.
• Therefore, the application of compound fertilizers should be avoided as much as possible and should be applied deeply with covering soil. Accurate use of compound fertilizers will bring us good benefits. In addition, when choosing compound fertilizer, you should also pay attention to the nutrients contained in it, as well as the packaging and manufacturer, and beware of being deceived.
• Plants need not only nitrogen, phosphorus, potassium, but also calcium, magnesium and other elements. Compound fertilizer actually refers to fertilizer containing two or more elements needed by plants. Such as calcium hydroxyphosphate, ammonium nitrate, etc. When applying compound fertilizer to plants, attention should be paid to the growth period and type of the plant, and compound fertilizer containing the elements needed by the plant should be used to facilitate plant growth.
• If compound fertilizer is applied excessively, certain factors in the plant will be enriched, which will affect plant growth. It may also make the concentration of liquid under the soil too high, causing seedling burning.

What is controlled slow release fertilizer:

• Slow-release fertilizers refer to fertilizers that release nutrients slowly after being applied to the soil at a much slower rate than instant fertilizers. They have slow-acting or long-acting properties.
• In a broad sense, slow-release fertilizers include all slow-release fertilizers that can extend the nutrient release period. To be precise, they refer to pre-setting the release pattern of fertilizers during the crop growth season through some kind of control mechanism or measure, so that the nutrient release pattern is consistent with that of the crop growth season. A type of special chemical fertilizer that absorbs nutrients of crops in a consistent (or basically consistent) manner to improve fertilizer efficiency.
• According to different crops and the different fertilizer requirements during the growth process of various crops, the controlled release period of slow-release fertilizers currently produced in advanced countries in the world ranges from 30 days to hundreds of days.
• Slow-controlled release fertilizers have the advantages of improving fertilizer utilization, reducing usage and frequency of fertilization, reducing production costs, reducing environmental pollution, and improving crop quality. The most prominent feature is the organic combination of nutrient release rate and release period with crop growth patterns, thereby achieving the purpose of improving fertilizer utilization efficiency.
• In view of the slow-release characteristics of slow-controlled release fertilizers, it is recommended to be mainly used as base fertilizer, which can reduce the number of top dressings. At the same time, in the selection of fertilizer varieties, the slow-controlled release period and slow-controlled release amount (full slow-controlled release, partial slow-controlled release) of slow-controlled-release fertilizers should be scientifically and reasonably selected based on the fertilizer demand patterns and characteristics of crops.
• Farmers must first have a comprehensive understanding of the characteristics of slow and controlled release fertilizers, so that they can use slow and controlled release fertilizers in a targeted manner and lay a good foundation for increasing agricultural production and income. Secondly, slow-controlled release fertilizers must be used scientifically and rationally based on experimental demonstrations to achieve better results. Any new technology and new products must go through the process of testing, demonstration, and promotion, otherwise they will pose great risks to agricultural and industrial production.

What is water flush fertilizer?

One story short flush fertilizer is fertilizer that has to be used with water together. Flush fertilization is also called water flush fertilizer. It is a method of top dressing, which is a fertilization method in which solid quick-acting chemical fertilizers are dissolved in water and fertilized with water. Flush fertilization is mainly used for top dressing during the peak growth season of vegetable crops. Widely used in greenhouse cultivation and open field vegetables. Fertilization is irrigation fertilization, and irrigation methods can be divided into well irrigation and border irrigation, including drip irrigation and sprinkler irrigation.

What are 7 Adventages of flush fertilizer?

1. Uniform and safe fertilization
2. Convenient fertilization without damaging the roots
3. Fast absorption and good fertilizer efficiency Absorption and utilization, good fertilizer efficiency. 
4. The quality and effect of fertilization are greatly affected by the amount of watering.
5. When using volatile fertilizers to fertilize, it is easy to increase the concentration of harmful gases in the protected area after fertilization, causing the problem of harmful gas poisoning.
6. The uniformity of fertilization is relatively poor.
7. The requirements for the type of fertilizer are relatively strict. ·Quick-acting chemical fertilizers commonly used include urea, ammonium nitrate, potassium nitrate, potassium dihydrogen phosphate, potassium sulfate, potassium chloride, etc.

Common type of fertilizer formula are:

Product specifications are:

1. General type: 15-15-15 45%
2. Compound fertilizer: 16-16-16 48%
3. Compound fertilizer: 17-17-17 51%
4. Compound fertilizer: 18-18-18 54%
5. Compound fertilizer: 15-10 -15 40%
6. High nitrogen type: 25-0-0 25%
7. Compound fertilizer: 30-0-0 30%
8. Compound fertilizer: 30-5-0 35%
9. Compound fertilizer: 30-0-5 35%
10. Compound fertilizer: 28- 5-7 40%
11. High phosphorus type: 18-22-5 45%
12. Compound fertilizer: 16-26-6 48%
13. High potassium type: 18-9-18 45%
14. High potassium type: 18-10-20 48%
15. Compound fertilizer : 15-5-21 41%
16. Colorful controlled release: 24-14-48%
17. Colorful controlled release: 22-8-12 42%
18. Ammonium sulfate: 20-24 (S) 64%
19. Ammonium sulfate: 26- 10-24 (S) 60%
20. Ammonium sulfate phosphate: 16-20-24 (S) 60%
21. Ammonium nitrophosphate: 26-13-0 39%
22. Solar energy efficient compound fertilizer: 26-0-0 26%
23. Solar energy efficient compound fertilizer ：26-0-6 32%
24. Solar energy efficient compound fertilizer: 25-5-6 36%
25. Solar energy efficient compound fertilizer: 18-6-18 42%
26. Potassium magnesium sulfate fertilizer: 22%

Conlcusion:

Thank you for reading this article, we have introduced 3 types of compound fertilizer, flush fertilizer, slow release fertilizer and normal compound fertilizer. Hope yall have a good day, Peace&Love.