The Meaning Of The Letters On Common Fertilizer Bags

- Aug 29, 2019-

Common fertilizer package letter summary


In the process of using chemical fertilizers, we sometimes see some NPK words on the fertilizer bags on the market. After consulting the relevant materials, there is no such fertilizer. Usually, the compound fertilizer we encounter is labeled with NPK, N for nitrogen, P for phosphorus, P2O5, and K for potassium, expressed as K2O.


TE means that the fertilizer contains trace elements. In the production of fertilizers, manufacturers often describe in the technical manual what the content of trace elements in fertilizers, and what form. The added trace elements are boron, iron, zinc, copper, and molybdenum, among which the chelating trace elements are optimally added.

For example, balanced water soluble fertilizer: 20-20-20+TE. It means that the total nitrogen content in this water-soluble fertilizer is 20%, the phosphorus pentoxide content is 20%, the potassium oxide content is 20%, and TE means that the fertilizer contains trace elements.


EM is a complex flora, which should be very common for this letter, and the EM microbial agent is marked on the bag. It is mainly composed of several large microflora and plays a big role in various microorganisms. Its core function is mainly Leading photosynthetic bacteria and Lactobacillus acidophilus. Its composition includes:

(1) Photosynthetic bacteria

It can use the solar heat received by the soil or use ultraviolet energy as the energy source to separate the hydrogen sulfide from the soil and the hydrogen in the hydrocarbon, and turn the harmful substances into harmless substances. It is the main force for fertile soil and the growth of animals and plants.

(2) Lactic acid bacteria

Lactic acid bacteria (anaerobic type), which mainly releases lactic acid based on the sugars produced by the photosynthetic bacteria yeast. It converts the decomposed organic matter into effective nutrients for animals and plants, which can inhibit the proliferation of pathogenic bacteria caused by continuous cropping disorders.

(3) Yeast group

Yeast (aerobic type) uses an amino acid, a saccharide, and other organic substances to produce an activated substance that promotes cell division by fermentation.

(4) Gram-positive actinomycetes (aerobic)

It takes amino acids, nitrogen and the like from photosynthetic bacteria as a matrix to produce various anti-biomass, vitamins and enzymes, which can directly inhibit pathogenic bacteria. It can enhance the resistance and immunity of animals and plants to various diseases.

(5) Filamentous flora of the fermentation system (animality)

It is mainly composed of Aspergillus used in fermenting alcohol, and it can coexist with other microorganisms, especially for the formation of esters in soil.


According to relevant information, the meaning of this letter was not found. Xiaobian thinks that it may be the exclusive fertilizer of some manufacturers, or some small manufacturers to carry out the edge ball fertilizer. If you see this letter when you buy fertilizer, be cautious. It is best to go to a regular farmer;s shop to buy fertilizer and safety insurance.


HAK is potassium humate. Occasionally, the compound fertilizer with the HAK letter is seen on the market. In fact, it is a compound fertilizer containing potassium humate. The main function is to prevent soil loss with water, and also to prevent the fixation of potassium in viscous soils, because it has the function of absorbing and storing potassium ions.

In addition, potassium humate or low-molecular humic acid such as fulvic acid has a dissolution effect on minerals such as potassium silicate and potassium feldspar, which can effectively alleviate potassium release and increase potassium content.


Soluble organic carbon. It means that under certain time and space conditions, it is strongly affected by plants and microorganisms, has certain solubility, moves faster, unstable, oxidized, easily decomposed and easily mineralized in the soil. Its shape and spatial position are for plants and microorganisms. The part of soil carbon that is relatively active. It is not a simple compound but one of the components of soil organic carbon.


HA is humic acid. Most of the humic acids in the market contain yellow humic acid, black humic acid and brown humic acid. Among them, yellow humic acid has a regulating effect, which is similar to a growth regulator, and has the effect of promoting and expanding stomata for crop growth.

In addition, yellow humic acid and potassium oxide extracted from humic acid can be made into potassium fulate. According to current research, the soil fertility is largely derived from the content of humic acid.


FA is fulvic acid, which is a plant growth regulator, which can promote plant growth, and can effectively control the openness of crop leaf stomata, and has a great effect on drought resistance. It can also improve the plant;s resistance to stress, greatly improve the plant;s yield and quality, and it can also be mixed with some non-alkaline pesticides, with synergistic effect.

9.TM and R

TM is a trademark that is being accepted. As long as it is accepted, it will be successful. Others cannot use it. R is accepted successfully and cannot be used by others.