Fertilizer is an essential part of the crop growing process. In all aspects of plant absorption of fertilizer, only when the fertilizer reaches the root surface can it be better absorbed. Nutrients generally need to reach the root system through mass flow and diffusion, and fertilizer must be dissolved in water to be absorbed by the root system. In order to improve the utilization rate of fertilizer and reduce the use of fertilizer, the application of integrated water and fertilizer facilities was spawned, and with the update of irrigation technology, the United States developed suspended liquid fertilizer in the 1960s. After years of promotion and application, suspended fertilizer has occupied a certain position in agricultural production in developed countries, especially in developed countries such as Israel and Finland and the Netherlands, where 90% of fertilizers are suspended fertilizers. Today, I will take you to understand the relevant knowledge of suspended fertilizer.

What is suspended fertilizer?

Suspended fertilizer and clear liquid fertilizer constitute the two major types of liquid fertilizer. The appearance of liquid fertilizer is clear and transparent, but the low nutrient content causes the transport distance to be limited. In order to solve these two problems, suspended fertilizer came into being. Suspended fertilizer is generally a thick opaque liquid containing many nutrients particles, and these small particles are evenly distributed in a saturated solution, which is not easy to produce sedimentation and stratification. Simple understanding is the composition of suspended fertilizer ≈ a large number of elemental water-soluble fertilizer, seaweed fertilizer, amino acid fertilizer and mineral humic acid fertilizer.

The core raw material of suspended fertilizer is suspended agent, which ensures the stability and uniformity of suspended particles by using the space action suspension technology. General suspension fertilizer will be adjusted to slightly acidic, the average size of various nutrient particles contained is less than 5 microns, and the stratification can be restored to the suspension state by stirring after 3 months.

Advantages and disadvantages of suspension fertilizer

It is also mentioned above that the production of suspension is to supplement the shortcomings of clear liquid fertilizer, so the first advantage is definitely the nutrient content. Suspended fertilizer is a kind of highly concentrated saturated solution, the nutrient content can be compared with the traditional powder a large number of elements, than the clear liquid fertilizer content is higher. Moreover, because of the low nutrient content of the clear liquid, the transportation cost is higher, and the suspended fertilizer extends the transportation distance to make up for this shortcoming.

The second point is that suspended fertilizer is a liquid fertilizer with good water solubility, which can be applied to root or liquid surface fertilization, and there is basically no dropper blockage, which can be quickly absorbed by the plant and improve the utilization rate of fertilizer.

The third point is that the nutrient elements contained in suspended fertilizer are rich and comprehensive and evenly distributed in the solution, reducing the problem of uneven fertilization. In addition, suspension fertilizer can also help blend pesticides, combining antagonistic elements together to achieve more effects.

Just now we also mentioned that suspended fertilizer will still appear stratified phenomenon for a long time, and the dissolution rate is slightly slower than that of clear liquid fertilizer. In addition, because of the high nutrient concentration and other factors, the price cost of suspended fertilizer is higher.

Simply distinguish between the good and the bad

First of all, look at the appearance, a good suspended fertilizer is not easy to stratify for a long time, does not caking, has good fluidity, and can be restored by stirring after slight stratification. Bad then weigh mass suspension fertilizer placed for a long time will be stratified and caked, poor fluidity. It can also be tested by weighing the weight, suspended fertilizer is a highly concentrated liquid fertilizer, compared with clear liquid fertilizer, the proportion of suspended fertilizer is generally above 1.4, lower than this value may be inferior fertilizer. In addition, good suspended fertilizer will not emit obvious odor, if in a weakly acidic or weakly alkaline environment may emit ammonia smell; On the other hand, poor quality fertilizer will give off a pungent smell.

With the acceleration of the construction of water and fertilizer integration infrastructure in China’s agricultural production, the importance of liquid fertilizer will gradually increase, and with the development of the industry, various measures need to be taken to promote the healthy development of liquid suspended fertilizer.