Aluminum Sulfate Soil Amendment

There are many lands that cannot be planted with crops because the alkalization and salinization of these soils are serious, and crops cannot grow. Soil amendment aluminum sulfate can be used to improve the salinization of soil, which has a significant improvement effect on soda saline alkali soil.

With the addition of an appropriate amount, the concentration of anions such as sulfate ions and chloride ions significantly decreases with the increase of leaching times. The concentrations of carbonate and bicarbonate ions also showed a significant decrease, but due to the influence of carbon dioxide in the air, the rate of decrease was not as fast as sulfate and chloride ions. However, it also significantly improved the ion results of the soil, making it more suitable for crop growth.

Leaching process can also significantly improve the chemical composition of soil, but excessive leaching can cause a significant loss of added aluminum sulfate. At the same time, under the action of shaking, some of the hydrolyzed colloids formed during the first addition are also destroyed, affecting the effectiveness of soil improvement. Moreover, the leaching and shaking process also destroys the original aggregates and microaggregates in the soil. Multiple leaching does not improve the physical properties of the soil, and even has a negative effect on the pH value of the soil solution.

When soil amendment aluminium sulfate is added to the soil without leaching, it significantly improves soil properties, especially in reducing soil alkalinity, with a significant effect. The improvement effect of soil pH value, soil bulk density, and soil particle size is very significant. Calcium and magnesium ions are gradually released, greatly reducing soil salinity. But using modified soil alone cannot solve soil problems from the root. Because the soil still has a high salinity, it cannot improve the salinity problem of the soil, but it also transforms the soil type from soda type to sulfuric acid type. Although it has not been completely solved, it also alleviates the soil problem.

Combining the advantages and disadvantages of two improvement methods can not only improve the alkalinity of soil, but also the salinity of soil, and better improve the soil environment. When the concentration is 0.8%, washing the soil twice yields better improvement results.

From the above description, we have learned that soil amendment aluminium sulphate combined with leaching can effectively improve soil salinization and make the soil more suitable for growth. Leaching alone cannot change the physical properties of the soil, and it still needs to be used in conjunction..

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