On the occasion of the spring, it is a good time for crops to be fattened. However, if the following 13 kinds of “taboos” are banned during fertilization, not only will the fertilizer be wasted, but the crops will suffer.

1. Ammonium bicarbonate and urea cannot be mixed.

When fertilizing fruit trees in spring, urea and ammonium bicarbonate are generally applied. The amide nitrogen in urea cannot be absorbed by crops. Only under the action of soil enzymes can it be absorbed and utilized by crops after conversion to ammonium nitrogen, and ammonium bicarbonate is applied. After the soil, the soil solution will be acidic in a short period of time, which can accelerate the loss of nitrogen in the urea, so the two cannot be mixed.

Second, ammonium bicarbonate can not be mixed with bacterial fertilizer

When applying the bacterial fertilizer in the soil, the bacterial fertilizer and the ammonium bicarbonate cannot be applied together, because the ammonium bicarbonate will emit a certain concentration of ammonia gas, which has a certain toxic effect on the active bacteria in the bacterial fertilizer, and the bacterial fertilizer will lose the fertilizer effect.

Third, acid fertilizer can not be mixed with alkaline fertilizer

Spring crops are generally more nitrogen-deficient. When applying nitrogen fertilizer, acid fertilizer and alkaline fertilizer cannot be mixed. Once mixed, neutralization reaction will occur, resulting in nitrogen loss and reduced fertilizer efficiency.

4. Water cannot be watered immediately after application of urea.

After the urea is applied to the crop, it cannot be watered immediately, because the urea is converted into an amide after being applied to the soil, and if it is immediately watered, it is easily lost with water. In addition, after applying urea, the method of covering soil can improve the fertilizer efficiency.

Fifth, avoid using ammonium nitrate

Pay more attention when applying ammonium nitrate, do not use it, because fruit trees are very easy to absorb ammonium nitrate ions, if excessive absorption, it will cause fruit tree poisoning.

6. Ammonium sulfate cannot be applied for a long time.

Ammonium sulfate on the market is a physiological acid fertilizer. If it is applied on the same soil for a long time, it will increase the acidity of the soil and destroy the structure of the soil. If it is applied in alkaline soil, the ammonium ion of ammonium sulfate will be absorbed. Residues of acid ions in the soil react with calcium, which makes the soil compacted and is also very important for root activity.

7. Do not use diammonium phosphate alone as base fertilizer or fertilizer.

In the northern region, there is a habit of applying diammonium phosphate as a base fertilizer or a seed fertilizer. Diammonium phosphate is a kind of high-phosphorus, low-nitrogen and potassium-free binary compound fertilizer. When applied, it needs to be combined with an appropriate amount of nitrogen and potassium fertilizer. will be better.

Eight, disable unfertilized manure

In the greenhouse cultivation in the spring, most of the crops have been planted. When the base fertilizer is applied before planting, the unfertilized manure cannot be applied, otherwise it may cause root burning, or the ammonia gas generated during the decomposition process will be harmful. seedling. For tomatoes, the application of unfertilized organic fertilizers is particularly prone to viral diseases.

Nine, do not apply high concentration fertilizer at one time

Some growers are afraid that the crops grown in the ground will not grow well. They want to increase the amount of fertilizer from the top of the fertilizer. The effect is definitely good, but no matter which kind of fertilizer, if one dose is too large, it may be Will cause the roots of the crop to be directly damaged, thus affecting the growth of the crop, which determines the output will not be good.

Ten, avoid applying or applying phosphorus fertilizer

The mobility of phosphorus in the soil is very small, and the application or application is particularly easy to be adsorbed and fixed by the soil, thereby greatly reducing the fertilizer efficiency of phosphorus.

XI, can not only use micro-fertilizer

In the crop planting, everyone pays more and more attention to trace elements, but we must pay attention to it. Although zinc, molybdenum, boron, rare earth and other micro-fertilizers have a good effect on the crop deficiency syndrome, it is forbidden to "micro-fertilizer". To avoid crop malnutrition and hinder growth and development.

12. Alkaline fertilizers such as calcium, magnesium and phosphate fertilizers cannot be mixed with ammonium ammonia fertilizer.

Because the alkaline fertilizer and ammonium ammonia fertilizer, such as ammonium sulfate, ammonium bicarbonate, ammonium chloride and the like, will cause the increase of ammonia volatilization loss, thereby reducing the fertilizer efficiency.

Thirteen, chemical fertilizers can not be mixed with bacteria such as rhizobium fertilizer

In general, chemical fertilizers have strong corrosiveness, volatility and water absorption. If mixed with bacterial fertilizers, they will kill or resist live cells and make the fertilizers ineffective.

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