There are four types of potash fertilizers, which are the best, and what are the general potassium f

It is best to import Canadian potash.

Potash fertilizers generally include:

1. Potassium nitrate.

Containing nitrate nitrogen and 46% potassium, it is a chemically neutral and physiologically neutral fertilizer, with good water solubility, and long-term application will not lead to soil acidification.

It is suitable for the expansion period of young fruits of vegetables and fruit trees to the early stage of coloring, and can promote the expansion of pulp cells. Because it contains nitrate nitrogen, it is not recommended to use it in the later stage of coloring, which is easy to cause regreening.

2. Potassium dihydrogen phosphate.

It contains 52% phosphorus and about 34% potassium, which is a chemically neutral and physiologically neutral fertilizer with good water solubility. Generally, before and after flowering, it can be used to promote root germination and flower bud differentiation, and provide energy for flowering and fruit setting.

The use of coloring period can promote powder coloring and increase the sweetness of fruits; The use of fruits after picking can promote the aging of branches and improve the degree of lignification of fruits.

3. Potassium chloride.

Potassium chloride is white or light yellow crystals in appearance, containing iron salts and red in color. Soluble in water, it is a highly concentrated fast-acting potassium fertilizer. It can be used as base fertilizer and top dressing, with a base fertilizer of 8 10 kg per mu and a top dressing of 5 7 kg per mu, and foliar spraying fertilizer is appropriate.

The scope of application is correspondingly smaller than that of potassium sulfate, and special attention should be paid to the use of chlorine-sensitive crops such as watermelon, grapes, potatoes, etc., so as to avoid "chlorine damage".

In addition, potassium chloride is not suitable for saline-alkali soils, but the chloride ions in potassium chloride have the effect of promoting photosynthesis and fiber formation, and are especially suitable for the application of fibrous crops such as hemp.

4. Potassium sulfate.

Potassium sulfate appears as white crystals or colored crystals or granules. Potassium content is theoretically 54%, generally 50%, is a chemically neutral, physiological acidic fertilizer, with good water solubility, characterized by small moisture absorption, not easy to agglomerate during storage, soluble in water.

Suitable for all kinds of crops, can be used as base fertilizer, top dressing and root top dressing, the general amount of base fertilizer per mu is 10 12 kg, the amount of top dressing per mu is 5 7 kg, and foliar spraying fertilizer is appropriate.

Potassium can generally be adsorbed by the soil and will not be lost, but the measure of "small amount and multiple meals" should also be taken on the sandy soil with poor fertilizer retention ability, and the best application effect is generally applied to potassium-loving crops such as potatoes and melons.

5. Potassium humate.

It is a kind of slow-acting organic solid potassium fertilizer, which is alkaline and contains biologically active humic acid, so it has very strong adsorption, complexation and chelation.

It can promote the more effective absorption and utilization of potassium by crops, and has a good effect on activating soil and promoting crop growth and resistance.

Especially for the compound potassium humate, it can also provide crops with a variety of nutrients such as nitrogen, phosphorus, potassium, organic matter and medium and trace elements, which can be widely used in basal fertilizer, top dressing and foliar spraying of various crops.

Potassium chloride: The potassium content is about 60%, which can be used as base fertilizer, top dressing, etc. when planting. Potassium sulfate:

The potassium content is between 50% and 54%. Potassium nitrate: can be applied directly to the soil surface and has high solubility.

Potassium dihydrogen phosphate: generally used as a foliar fertilizer for application. Grass Ash:

Refers to the residues of crops after burning.

1. Potassium chloride

The potassium content in potassium chloride fertilizer is about 60%, which can be used as base fertilizer, top dressing, etc. when planting, but it should not be used for seed fertilizer, when used as base fertilizer, it should be evenly mixed in the soil 10-15 days before sowing, and it should not be used in tobacco, sugar beets, sugarcane and other chlorine-avoiding crops.

2. Potassium sulfate

The content of potassium in potassium sulfate is between 50% and 54%, generally used as base fertilizer, top dressing, seed fertilizer and root top dressing, when used as base fertilizer, deep fertilizer and soil covering, when used as top dressing, it is necessary to apply strips or holes to the root system of dense soil layer, root top dressing to be diluted with water.

3. Potassium nitrate

Potassium in potassium nitrate accounts for about 46%, this kind of fertilizer can be applied directly to the soil surface, they are more obvious for tobacco, sugar beet, sugarcane and other chlorine-resistant crops, potassium nitrate has high solubility, nitrogen and potassium can be quickly absorbed by crops, no chemical residues.

4. Potassium dihydrogen phosphate

The potassium content in potassium dihydrogen phosphate is about 34%, and the content of potassium oxide is about 34%, which can generally be used as foliar fertilizer for application, which is to increase crop yield and prevent premature aging of crops.

5. Grass and wood ash

Grass ash refers to the residue after crop burning, the content of potassium is between 6% and 12%, it belongs to a kind of inorganic farm fertilizer with low cost, complete nutrients and obvious fertilizer efficiency, the texture of plant ash is light, and alkaline, and nitrogen fertilizer contact, easy to cause nitrogen volatilization loss.

Now the commonly used potash fertilizers on the market are potassium chloride, potassium sulfate, potassium nitrate, potassium dihydrogen phosphate, potassium phosphite and so on. Potassium chloride is the cheapest from the point of view, and the water solubility is also very good, which is most suitable for field use. When used in the middle and late stages, the combination of phosphate fertilizer can sweeten and color the fruit and ripen quickly.

Potash is the most important of the many elements we usually use. Potassium fertilizer is generally used in the middle and late stages, which can be combined with phosphate fertilizer to sweeten and color the fruit and ripen quickly.

So what kind of potash fertilizer is best? In fact, the main thing is to look at crops (such as watermelon, rice, sweet potato, corn, peach trees, etc.), the time and way of use, to determine what kind of potassium fertilizer is the best, today I will explain to you the rational use of potassium fertilizer.

There are only a few potash fertilizers commonly used in the market nowFor example, potassium chloride, potassium sulfate, potassium nitrate, potassium dihydrogen phosphate, potassium phosphite and so on

1. Potassium chloride

Potassium chloride is the cheapest from the point of view, and the water solubility is also very good, which is most suitable for field use. Because the salt content in potassium chloride is too high, most of the fields pass through the rainforest, and the salt tolerance is relatively good, and the use of potassium chloride is the most cost-effective.

2. Potassium sulfate

Potassium sulfate is generally used in cash crops and is slightly higher than potassium chloride**. Under normal circumstances, the same ton of potassium sulfate is about 200 yuan higher than potassium chloride**. However, potassium sulfate is an acidic fertilizer, and large amounts of it can also cause soil acidification and root malabsorption.

3. Potassium nitrate

Potassium nitrate is particularly water-soluble, and is generally suitable for top dressing, but the nitrate nitrogen content in potassium nitrate is too high, and the content is.

Although the content of potassium fertilizer is 46% is already very high, the use of potassium nitrate in large quantities will cause rapid expansion of the fruit in the early stage, but it is difficult to color the fruit in the later stage, which is also the biggest disadvantage of Qiwei potassium nitrate.

Potassium nitrate is not recommended for later ripening when using local purity for colored crops, and potassium nitrate is not recommended for later maturity.

4. Potassium dihydrogen phosphate

The use of potassium dihydrogen phosphate in agriculture. There are many ways to do it. Most of them are mainly flushing and foliar spraying. Potassium dihydrogen phosphate is very high in both phosphate and potassium fertilizers.

Potassium dihydrogen phosphate contains 52% of phosphate fertilizer, and 34% of potassium fertilizer is also a fertilizer with good water solubility. However, the dissolution of potassium dihydrogen phosphate has a certain saturation, and it needs a large amount of water to melt, and the dissolution time is slow.

The best fertilizer on the market today is flash dissolved potassium dihydrogen phosphate, which is puffed potassium dihydrogen phosphate, which is more soluble in water and more easily absorbed by the root system.

5. Potassium phosphite

Potassium phosphite is an emerging fertilizer in recent years, because the trivalent phosphorus in potassium phosphite will have a bactericidal effect when converted into 5-valent phosphorus, so it has certain benefits for plant disease prevention.

However, the conversion rate of phosphate fertilizer is low, and the utilization rate of phosphate fertilizer is low. When using potassium phosphite, we must pay attention to the temperature problem, because too high temperature is easy to produce pesticide damage.

As for the small amount of potassium fertilizer that we encounter in the planting process,For example, organic potassium, potassium carbonate, potassium polyphosphate, potassium pyrophosphate, etc。In general, it is rarely used, so I won't explain them one by one today. Everyone still chooses the right potash fertilizer according to their own plants and usage.

<>The main types of potash fertilizers are potassium chloride, potassium sulfate, potassium nitrate, potassium dihydrogen phosphate, etc.

Potassium chloride: its potassium oxide content is 50%-60%, which is a fast-acting fertilizer, and is generally used as base fertilizer and top dressing.

Potassium sulfate: The potassium content is about 50%, and the sulfur content is about 18%, which is suitable for various soils and crops.

Potassium nitrate: the content of nitrate nitrogen is about 46%, and the content of potassium is about 46%, which is suitable for top dressing.

Potassium dihydrogen phosphate: suitable for all kinds of cash crops.

1. Potassium chloride

1. Potassium chloride is mainly made of carnallite, potassium salt and bitter halide, which contains 50-60% potassium oxide.

2. Potassium chloride is easily soluble in water, and the solubility is about 20 and 100.

3. Potassium chloride is a fast-acting fertilizer, which is often used as base fertilizer and top dressing, which can be directly absorbed by plants.

4. Potassium chloride has low hygroscopicity, will not agglomerate under normal circumstances, and has good physical properties and is easy to apply.

5. When potassium chloride is stored, it should be placed in a cool and ventilated warehouse, and it should be stored separately from the oxidant, and it should be stored away from fire and heat sources.

2. Potassium sulfate

1. Pure potassium sulfate products are mostly diamond-shaped or hexagonal crystals, and the color is mostly white or light yellow.

2. About 70% of the potassium sulfate produced in the world is obtained by the conversion of potassium chloride, and some of it is directly obtained from natural minerals and hard salt ores.

3. Potassium sulfate is a water-soluble potassium fertilizer, which contains 50-52% potassium and about 18% sulfur, with low hygroscopicity, not easy to agglomerate, and good physical properties.

4. Potassium sulfate is suitable for all kinds of soil and crop use, especially for cash crops that avoid chlorine and potassium, such as tobacco, grapes, sugar beet, etc.

3. Potassium nitrate

1. Potassium nitrate is mostly colorless and transparent orthorhombic and diamond-shaped crystals, or white powder, which is odorless, non-toxic and salty.

2. Potassium nitrate is a neutral fertilizer, which contains about 46% potassium and nitrate nitrogen, and has good water solubility.

3. Potassium nitrate is mostly used as top dressing, which can be applied to vegetables, fruits, flowers, and some chlorine-sensitive crops, such as potatoes, strawberries, beans, cabbage, apricots, etc.

4. Potassium dihydrogen phosphate

1. Potassium dihydrogen phosphate is a transparent liquid after melting, and opaque glassy after curing.

2. Potassium dihydrogen phosphate is a high-efficiency phosphorus and potassium compound fertilizer, which contains about 52% phosphorus and about 34% potassium.

3. Potassium dihydrogen phosphate is suitable for all kinds of cash crops, including grains, fruits, vegetables, etc., and can generally be used before and after flowering, coloring period, and fruit picking.

4. After the application of potassium dihydrogen phosphate, it has the functions of significantly increasing crop yield, improving crop quality, and improving crop lodging resistance, disease and pest resistance.

Potassium fertilizer refers to the fertilizer rich in potassium content, mainly plant ash, monopotassium phosphate, potassium chloride, etc., in addition to potassium rock salt, kiln ash potassium fertilizer, etc., the main role is to improve the photosynthesis of plants, by adjusting the closure of the stomata, promote the formation of carbohydrates, can also accelerate the formation of protein, can be used as a base fertilizer, can also be used for top dressing and foliar fertilizer.

Potash fertilizer refers to fertilizers rich in potassium elements, mainly plant ash, monopotassium phosphate, potassium chloride, etc., in addition to potassium rock salt, kiln ash potassium fertilizer, etc., most of which can be dissolved in water, fertilizer effect is fast, can also be completely absorbed by the soil, and fertility will not be easily lost.

The main role of potassium fertilizer is to improve the photosynthesis of plants, by regulating the closure of stomata, promote the formation of carbohydrates, can also speed up the formation of protein, can increase the protein content in food crops, crude fat content in oil crops, can also increase vitamin C in fruit crops, change the size and flavor.

When crops lack potassium fertilizer, the edges of the leaves will be scorched, the old leaves will fall off, the stems will be prone to lodging and premature senescence, the root growth will be impaired, the growth of the twigs will be weak, and the growth and development of the fruit will be poor, the ripening time will be inconsistent, and the coloring will be uneven.

Potash fertilizer can be used as basal fertilizer, can also be used as top dressing, a small number of varieties can also be used as foliar fertilizer, as a base fertilizer, before planting into the soil, to meet the need for potassium during planting, during the planting of top dressing, can be diluted with water watering, used as foliar fertilizer is directly sprayed on both sides of the foliage.