First, how to choose humic acid fertilizer.

(1) Look at the implementation standards.

At present, the corrosive acid products on the market are chaotic and there is no unified standard. NY\/T1106-2010 Water-soluble fertilizer containing corrosive acid is the industry standard of China's corrosive acid fertilizer issued by the Ministry of Agriculture, and it is also the standard currently used. The rest are the standards of enterprises. So far, the industry standard and national standard related to corrosive acid fertilizer have not been announced. Therefore, the current implementation standard is NY\/T1106-2010 humic acid-containing water-soluble fertilizer is the real humic acid-containing fertilizer.

When adding corrosive phytic acid to compound fertilizer or mixed fertilizer, the content of corrosive phytic acid can only be marked on the ingredients of the packaging bag, but the name of the fertilizer packaging bag cannot be changed. That is to say, the packaging bag must be marked with compound fertilizer or mixed fertilizer , The compound fertilizer containing corrosive phytic acid cannot be marked. At the same time, the nitrogen, phosphorus and potassium content in the fertilizer should also meet the compound fertilizer standard or the mixed fertilizer standard.

(2) See if humic acid is displayed.

The packaging bag must clearly indicate the content of corrosive acid. For example, the content of corrosive acid is greater than or equal to 20 percent. Only the words containing corrosive acid are marked. If there is no specific marking of the content, it is not formal. Because the content of 0.01 percent is also called the content .

(3) Check the instructions for use of the product.

According to different crops and different periods, the amount of corrosive acid fertilizers used is also different, so the instructions must be written completely and carefully, and the different usage and dosage during the growing period of crops are clearly defined. If the instructions are written rough, there is no professional technology The use of the personnel guide, do not recommend the purchase.

Leave receipts, packaging and samples when you choose, and maintain your rights immediately if you have any questions.

2. Identify the quality of corrosion acid fertilizer.

First of all, according to the quality of water solubility.

Put the humic acid fertilizer into the water, observe the fast dissolving speed, whether it can be completely dissolved, and whether there is any sediment. Usually good quality corrosive acid fertilizers perform well.

Second, check the color.

Corrosive acid water-soluble fertilizer and powder, pour a small amount of water, the color of the water will turn brown and black. If the color is very dark, it may be dyed corrosive acid fertilizer particles, which can be rubbed by hand, and the color is difficult to wash off with water after fading. Suspected of dyeing. Smash the particles to see if the color inside and outside is uniform and black-brown, only the black and white (or other colors) on the outside are also suspected of dyeing.

It is especially emphasized that there is currently a fertilizer on the market that is white pellets, falsely claiming that white phytoacid is added to it, so it is white. If you come across it, don't buy it, because there is no white phytoacid!

Finally, it is judged whether the corrosive acid is activated.

Some corrosive acid fertilizers are added with unactivated or low-level activated biochemical corrosive acid raw powder, which has poor corrosion acid fertilizer effect and slow effect. Activated mineral source humic acid has high price, good effect, high absorption and utilization rate, and high activity.

Taking phosphate rock powder as an example, phosphate rock powder also has phosphorus content, but the effect is slow, and it can only be effective when processed into calcium phosphate.

Corrosive acid is also the same, it must be activated to exert the effect of fertilizer. Seeing cheap corrosive acid fertilizer, the possibility of adding biochemical corrosive acid raw powder to corrosive acid fertilizer is very high, and you must pay attention.