For alkaline soil, these fertilizers are suitable choices so that crops can grow well

Soil salinization is one of the most common phenomena in farmland, and it is related to factors such as improper application of soil fertilizers, too little application of organic fertilizer, and too shallow a plow layer. Fertilizers for saline-alkali land must not be used indiscriminately, otherwise it will only worsen salinization. At the same time, acidic fertilizers should also be avoided because they can lose fertility through neutralization reactions. So how should fertilizer be applied to saline-alkali land? Here is a detailed introduction.

Avoid acidic fertilizers

Since farmland soil is alkaline, if acidic fertilizers are used during fertilization, the fertilizer efficiency will naturally decrease, and attention should also be paid to elemental ions that react with hydroxide ions. For example, acidic potassium dihydrogen phosphate fertilizer: after such fertilizer is applied, fertilizer efficiency will be greatly reduced. As for superphosphate, it is not only a matter of acid-base reaction; calcium ions will also react with hydroxide ions and become difficult for plants to absorb and use.

At the same time, alkaline fertilizers should also be used as little as possible. After all, the soil is already saline-alkali; if alkaline fertilizers continue to be used, it will only worsen soil salinization. Examples include ammonium sulfate, superphosphate, potassium carbonate, and so on.

What fertilizers should be used?

For saline-alkali land, the best fertilizer is none other than organic fertilizer (including farmyard manure). Such fertilizer not only helps greatly improve soil pH, but also helps increase soil fertility. For many farmers, the cause of soil salinization is not actually a problem with the cultivated land, but more a problem with fertilization: first, too little organic fertilizer is applied; second, chemical fertilizers are used long-term without knowing how to control them. Naturally, the soil becomes increasingly barren and the degree of salinization becomes higher and higher.

In addition to applying a large amount of organic fertilizer as a topdressing, microbial fertilizer can also be considered. This is currently a new type of highly efficient fertilizer that provides nutrients to crops through microbial metabolism. Although this fertilizer has a slow effect, it is very helpful for farmland ecological protection. However, the fertilizer provided to crops by organic fertilizer and microbial fertilizer is limited after all. When topdressing during the vigorous growth stage of crops, appropriate chemical fertilizers are still needed. Fertilizers such as urea and ammonium bicarbonate can also be used. In addition, fertilizers such as potassium chloride and potassium sulfate can also be used.

The above is a little view shared with you by Kexue Xingnong, and we hope it is helpful to you.