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سولفات پتاسیم

Potassium Sulfate

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Potassium Sulfate

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Potassium Sulfate
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Satshid Sepehr Company is the only importer of one of the highest qualities of potassium sulfate fertilizer from Uzbekistan in Iran, which is compatible with Iran's climatic conditions. It can be said that it has higher yields than its domestic or other similar foreign products. You can use the company's imported Uzbek potassium sulfate for pistachios and other fruits.

What is Potassium Sulfate Fertilizer or Solo Potash?

Potassium sulfate fertilizer under the brand name Solo Potash is a widely used chemical fertilizer used as a potassium and sulfur source. Fast-absorbing potassium sulfate fertilizer can be applied dry for fertilization or as drip irrigation and spray solution. Potassium fertilizer (K) is usually added to soils that are not able to provide enough of this nutrient to improve the yield and quality of growing plants. Most K fertilizers come from old salt deposits around the world.

Potassium fertilizers, especially potassium sulfate, are called quality fertilizers in the field of horticulture because potassium improves fruit skin color, palatability, increases sugar and vitamin C in citrus fruits and most fruits. The size of the fruit also depends to some extent on potassium.

Vegetables such as tomatoes, spinach, lettuce, and celery require large amounts of potassium sulfate. If they do not have enough potassium, their performance and quality will be adversely reduced. In potatoes, it has been shown that if enough potassium is consumed, due to the relative increase in the amount of citric acid compared to chlorogenic acid, the blackening of the potato tuber will be delayed after peeling. Potassium sulfate with the chemical formula K2S

Types of potassium sulfate fertilizers

  • Powdered potassium sulfate fertilizer
  • Granular potassium sulfate fertilizer
  • Rock potassium sulfate fertilizer

Method of production of potassium sulfate fertilizer

The production of this substance is done in different ways; the reaction of potassium chloride with Langbeinite ore, the reaction of potassium chloride with sulfuric acid or sulfur dioxide, water and oxygen, and also the recycling of sugar waste are among the methods used to produce this chemical compound.

Potassium function in plant

Potassium (K) is one of the key nutrients for plants and has various effects such as:

  • helping to make proteins, starches, and sugars
  • Increasing the activity of enzymes
  • Increasing photosynthesis
  • Control of water flow through the plant

The following figure shows the K cycle used by the plant.

K cycle used plant, Satshid Sepehr Company, importer of chemical fertilizers from Uzbekistan.

Although Potassium Sulfate is not the most common source of K among fertilizers, it is able to meet the needs of plants. Another influential factor is sulfur, which is required for protein synthesis and enzyme function. Unlike many simple compounds used as fertilizer, potassium sulfate is not widely available in mineral form. Instead, traditionally, KCl, which is widely available in mineral form, produces potassium sulfate and hydrogen chloride by reacting with sulfuric acid. Recently, however, it has been possible to extract it from other minerals such as kyanite and shonite, mainly magnesium salts and some K2SO4.

K2SO4 is available in different particle sizes. Manufacturers are looking to produce particles in very small sizes (less than 0.015mm). These small particles can be used to irrigate or spray fertilizer on the leaves. The small size of the particles causes the fertilizer to decompose faster and reach the plant. Farmers often use this fertilizer when the excess chlorine in KCL fertilizers is undesirable. Experts recommend that this substance be used in different doses. This prevents the accumulation of excess K in the plant and it also prevents potential salt damage.

Uses of potassium sulfate fertilizer in agriculture

Potassium is needed to complete many essential functions in plants, including activating enzymatic reactions, synthesizing proteins, forming starches and sugars, and regulating water flow in cells and leaves. Often the concentration of K in the soil is too low to support the growth of a healthy plant.

Potassium sulfate is an excellent source of "K" for plant nutrition. The potassium fraction of K₂SO₄ is no different from other common potassium fertilizers. However, potassium sulfate is also an important source of "S", which plants need for protein synthesis and enzyme function. Like potassium, sulfur can be essential for adequate plant growth.

In addition, in some soils and crops, the use of excess "CL" should be avoided. In such cases, K₂SO₄ is a very suitable K source. Potassium sulfate fertilizer is produced in the form of granules in different sizes, but manufacturers usually produce fine particles (less than 0.015 mm) to increase the solubility of this fertilizer for irrigation or foliar spraying.

Some growers consider foliar spraying with K₂SO₄ to be a good way to use extra "K" and "S" in plants. However, if the concentration is too high, it can damage the leaves.

Importance of using potassium sulfate fertilizer

Potassium sulfate can be used as a nutrient at any stage of plant growth, and in addition to providing potassium, it also meets the plant's needs for sulfate to the required extent.

The use of this fertilizer in the drip irrigation system and alkaline soils acidifies the area around the roots and facilitates the absorption of phosphate and micronutrients in the soil. It should also be noted that potassium is the best option in hydroponic cultivation as a source of potassium.

Potassium sulfate fertilizer activates more than 50 enzymes, makes proteins, interferes with photosynthesis, regulates osmotic pressure, enlarges cell, stimulates cell division and growth, regulates stomatal movements, helps transfer nourished milk, regulates anion and cation balance in plants, and helps to increase resistance to drought, frost and salinity, resistance to dormancy or wilt in cereals.

Management of using potassium sulfate fertilizer

Plant growers often use K₂SO₄ for products for which excess chloride- common KCl fertilizers- is undesirable. The relative salt index K₂SO₄ is lower than other conventional "K" fertilizers, therefore less total salinity is added to the soil per K.

The amount of salt (EC) obtained from the K₂SO₄ solution is less than one-third of the concentration, similar to that of the KCl solution. Where high rates of K₂SO₄ are required; agricultural engineers usually recommend using this fertilizer in multiple doses. This helps prevent excess K accumulation by the plant as well as minimizing any possible salt damage.

The proper method and time of using potassium sulfate fertilizer

Potassium sulfate helps to improve the production of crops such as wheat, corn, cotton, alfalfa, and peanuts. Since most plants absorb the potassium they need in the early stages of growth, therefore the best time to fertilize is when planting or in the early stages of growth.

For better effectiveness of this fertilizer in fruit trees, it is recommended to postpone its use until after flowering and during the fruit growth period. It is worth noting that potassium fertilizers are completely soluble in water and, in some cases, have a high salt index. As a result, they may damage the germination of the plant as they approach the seed or graft.

Note that these damages occur in sandy soils, under dry climates, and at higher fertilizer concentrations. Therefore, the best position to place fertilizer in the soil is 1.5 inches below the seed and 3 inches away.

Another important point to note about potassium sulfate fertilizer is that the fall use of potassium in sandy loam, sandy or organic soils is not recommended because the rains of this season can easily wash away the fertilizer.

Properties and use of potassium sulfate

Potassium sulfate fertilizer in agriculture is known as one of the most important and essential types of fertilizers. One of the major characteristics of potassium sulfate fertilizer is that it is rapidly absorbed by plant tissues. Potassium sulfate increases plant resistance to living and non-living environmental stresses such as pests, diseases, cold, dehydration and salinity.

Potassium sulfate is also effective in photosynthesis, osmotic regulation, cell growth, daily regulation, and plant water system.

Adequate amounts of potassium sulfate are essential to preserving plant life in saline conditions. Fortunately, the plasma membranes of root cortex cells have a high adsorption capacity for potassium versus sodium. However, this selectivity is quite different between plant species. This is especially important where the concentration of dissolved sodium in the soil is higher than that of potassium. The high selectivity of K/Na in plants is maintained in conditions where, firstly, the calcium status of the roots is sufficient and, secondly, sufficient oxygen reaches the roots. Of course, in addition to plant species, the degree of K/Na selectivity varies even within cultivars of one species.

The roots of salinity-resistant species have a higher uptake of potassium versus sodium than that of susceptible species. Salinity reduces leaf potassium concentration of salinity-sensitive cotton cultivars more than resistant cultivars. Evidence suggests that in most plant species, sodium glycophytes can be partially substituted for potassium without adversely affecting growth.

Advantages of potassium sulfate fertilizer

  • Increasing water consumption efficiency
  • Activation of enzymes
  • Increasing frost resistance
  • Increasing drought resistance
  • Increasing salinity resistance
  • Increasing disease resistance
  • Increasing pest resistance
  • Increasing grain dormancy resistance
  • Improving the color quality and taste of fruits
  • Acidification of soil
  • Increasing prematurity
  • Increasing absorption of iron, phosphorus, and micronutrients

Useful recommendations on using potassium sulfate fertilizer

  • If potassium sulfate fertilizer is used as a foliar spray, it should be dissolved in a separate container in water.
  • Do not mix potassium sulfate fertilizer with calcium or copper compounds in any way.
  • If a suitable coating is applied to the tree foliage when spraying with potassium sulfate fertilizer, the effect of using it will be higher.
  • The best time to apply potassium sulfate fertilizer in fruit trees is after flowering and during fruit growth.

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