1. Ammonium carbon and urea should not be mixed

When we fertilise our fruit trees in spring, we generally apply urea and ammonium carbon, but we need to know that the amide nitrogen in urea cannot be absorbed by the crop and can only be absorbed and used by the crop after it has been converted into ammonium nitrogen by the action of glandular enzymes in the soil, while ammonium carbon, when applied to the soil, will cause an acidic reaction in the soil solution in the short term and can accelerate the volatile loss of nitrogen in urea, so the two of them are 2.

2. Ammonium carbon should not be mixed with bacterial fertilisers either

Sometimes, when we apply fertilizer to fruit trees in spring, we also apply some fungal fertilizer inside the soil, but every day farming advice to all the cats do not apply the fungal fertilizer and ammonium carbon together, because ammonium carbon will emit a certain concentration of ammonia, the active bacteria in the fungal fertilizer has a certain toxic effect, it will make the fungal fertilizer lose its fertilizing effect, the fungal fertilizer is not cheap, if it fails, it is a heavy loss for us.

3. Acidic fertilisers should not be mixed with alkaline fertilisers

In the spring, fruit trees are generally more nitrogen deficient, we will also apply a certain amount of nitrogen fertilizer accordingly, but we must not mix acidic fertilizers and alkaline fertilizers, such as ammonium carbonate, ammonium sulfate, ammonium nitrate, ammonium phosphate can not be mixed with grass ash, lime, kiln ash potash and other alkaline fertilizers, once mixed, they will be neutralized reaction, resulting in nitrogen loss, reducing the effectiveness of fertilizer.

4. urea should not be watered immediately after application?

We can't water immediately after applying urea to fruit trees, because urea will be converted into amide when applied to the soil, and if watered immediately, it will be easily lost with water, and we can't apply it before heavy rain, we need to pay attention to the fact that after applying urea, the use of mulch can improve the effectiveness of the fertiliser.

5. Do not use ammonium nitrate

We are in the process of planting fruit trees, for the application of ammonium nitrate must pay more attention, can not be used, because the fruit trees on the ammonium nitrate ion is very easy to absorb, if absorbed in excess, it will cause the phenomenon of poisoning of fruit trees.

6. ammonium sulphate can not be applied for a long time

Ammonium sulphate on the market is a physiologically acidic fertilizer, if we apply it on the same soil for a long time, it will increase the acidity of the soil and destroy the soil granular structure; if we apply it in alkaline soil, the ammonium ions of ammonium sulphate will be absorbed, and the acid ions left in the soil react with calcium, it will make the soil hard and hard, which is also very influential for the root activities of fruit trees.

7. Do not apply diammonium phosphate alone as a base or seed fertiliser

In the northern region, we will have the habit of using diammonium phosphate as a base or seed fertilizer, but in fact, diammonium phosphate is a high phosphorus, low nitrogen, no potassium binary compound fertilizer, it is necessary to apply with the right amount of nitrogen, potassium fertilizer, so that the effect will be better.

8. No unrotted manure

In the spring, most crops are planted, and before planting they must be fertilised, and manure is the fertiliser of choice for most of us, but we must be careful not to use unrotted manure, as it may cause root burning, or the ammonia produced during decomposition may harm the seedlings. For tomatoes in particular, the application of unrotted organic manure is particularly likely to cause virus disease.

9. Don't apply too much fertiliser at once in high concentrations

Some growers are afraid that their crops will not grow well in the ground, so they think of starting with fertiliser, thinking that the effect will be good if they increase the amount of fertiliser, but no matter what kind of fertiliser it is, if the dose is too high at one time, the root system of the crop may be directly damaged, thus affecting the growth of the crop and deciding that the yield will not be much better.

Although many growers have been farming for a long time and are quite experienced, they still need to be careful not to overdo the fertiliser.

10. Do not spread or top-dress phosphate fertilisers

Phosphorus is very mobile in the soil and is particularly susceptible to adsorption and fixation by the soil, which greatly reduces the effectiveness of phosphorus.

11. Do not use only micronutrients

In the current crop cultivation, we are paying more and more attention to micronutrients, but we must note that although zinc, molybdenum, boron, rare earths and other micronutrients have a very good effect on crop "deficiency", but do not "micronutrients as home", to avoid causing crop malnutrition 12.

12. alkaline fertilisers such as calcium, magnesium and phosphorus should not be mixed with ammonium ammonia fertilisers

Because alkaline fertilisers and ammonium ammonia fertilisers, such as ammonium sulphate, ammonium carbonate, ammonium chloride, etc., can lead to increased ammonia volatilisation losses, thus reducing the effectiveness of the fertiliser.

13. Chemical fertilizers should not be mixed with bacteria such as rhizobia fertilizers

Generally speaking, chemical fertilizers have strong corrosive, volatile and absorbent properties, and if mixed with bacterial fertilizers, they will kill or resist the living bacteria and render the fertilizer ineffective.