The spring season is a good time for crops to be fat and fat. However, because of the different crops and different fertilizers, we should understand some of the “taboos” on the application of fertilizers, so as not to waste the fertilizer and even cause the crops to be paralyzed.

Ammonium bicarbonate and urea cannot be mixed. When fertilizing fruit trees in spring, urea and ammonium bicarbonate are generally applied. However, the amide nitrogen in urea cannot be absorbed by crops, and only under the action of gland enzymes in the soil, it can be absorbed and utilized by crops after being converted into ammonium nitrogen. When ammonium bicarbonate is applied to the soil, it will cause the soil solution to react acidicly in a short period of time, which accelerates the volatilization loss of nitrogen in the urea. Therefore, they cannot be mixed and applied.

Ammonium bicarbonate cannot be mixed with bacterial fertilizer. When the growers are chasing fertilizers in the spring fruit trees, they will also apply some fertilizer in the soil, but because ammonium bicarbonate will emit a certain concentration of ammonia gas, it will have a certain toxic effect on the active bacteria in the bacterial fertilizer, which will make the bacterial fertilizer Lose weight.

Acidic fertilizers cannot be mixed with alkaline fertilizers. In the spring, fruit trees are generally more nitrogen-deficient, so growers will apply a certain amount of nitrogen fertilizer accordingly. However, it is absolutely impossible to mix acid fertilizer and alkaline fertilizer. Once mixed, they will neutralize, which will cause nitrogen loss and reduce fertilizer efficiency.

Water cannot be watered immediately after application of urea. After the urea is applied to the fruit trees, it cannot be watered immediately, because the urea is converted into amide after being applied to the soil. If it is immediately watered, it is easily lost with water, and of course it cannot be applied before heavy rain.

The fruit tree avoids ammonium nitrate. In the process of planting fruit trees, it is necessary to pay more attention to the application of ammonium nitrate. If it is not used, it will cause poisoning of fruit trees.

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 soil aggregate structure. If applied in alkaline soil, ammonium ions of ammonium sulfate will be absorbed, and acid ions remaining in the soil react with calcium, which will harden the soil compaction.

Do not apply diammonium phosphate as a base fertilizer. In the northern region, everyone will use the principle of diammonium phosphate as the base fertilizer or seed fertilizer, but in fact, diammonium phosphate is a kind of high-phosphorus, low-nitrogen, potassium-free binary compound fertilizer, which is needed and appropriate when applied. The combination of nitrogen and potassium fertilizer will make the effect better.

Disable unfertilized manure. It must be noted that you should never apply unfertilized manure, otherwise it may cause root burning, or the ammonia produced during the decomposition process will also harm the seedlings. Especially for tomatoes, the application of unfertilized organic fertilizer is particularly prone to cause viral diseases.

Do not apply high concentrations of fertilizer at one time. Some growers are afraid that the crops in the ground are not growing well, and they are thinking about starting from the fertilizer and thinking about increasing the amount of fertilizer. However, regardless of the type of fertilizer, if the dose is too large, the roots of the crop may be directly damaged, thereby affecting the growth of the crop.

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.

Can't just use micro-fertilizer. In the current crop planting, everyone pays more and more attention to trace elements, but it must be noted that although zinc, molybdenum, boron, rare earth and other micro-fertilizers have a good effect on crop "deficiency", but should not be "micro Fertilizer is the master, to avoid causing crop malnutrition and hindered growth and development.

Alkaline fertilizers cannot be mixed with ammonium nitrogen fertilizer. Because alkaline fertilizers and ammonium ammonia fertilizers, such as ammonium sulfate, ammonium bicarbonate, ammonium chloride, etc., will cause loss of ammonia volatilization, thereby reducing fertilizer efficiency.

Fertilizers cannot be mixed with rhizobial fertilizers. In general, chemical fertilizers have strong corrosiveness, volatility and water absorption. If mixed with bacterial fertilizer, it will kill or resist live bacteria, causing fertilizer failure.

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