The main potash fertilizer
The main potash fertilizer on the market are potassium nitrate, potassium sulfate, mono potassium phosphate, potassium chloride, etc., what are the characteristics of various potash, but also their own "little temper", only to clarify their differences in order to be better used.
Today, let's together to know them:
1. Potassium Nitrate
Potassium nitrate containing 13.5% of nitrate nitrogen, 46% potassium, which is a chemical neutral、physiological neutral fertilizer, with good water solubility, long-term use, will not lead to soil acidification. Applicable to vegetables, fruit trees grow into the early stages of coloring, can promote the expansion of flesh cells. Due to containing nitrate nitrogen, do not recommend the use of late coloring, likely to cause turn green.
2. Potassium Dihydrogen Phosphate
Potassium dihydrogen phosphate containing 52% phosphorus, about 34% potassium, which is a chemical neutral, physiological neutral fertilizer, with good water solubility. Generally before and after flowering, can be used to promote root germination and flower bud differentiation, for the flowering fruit to provide energy. Coloring period can promote the use of powder on the color, increase the fruit sweetness; After picking fruit to use can promote the aging of the branches to improve the degree of fruit lignification .
Many people asked the potassium nitrate and potassium dihydrogen phosphate, which one is better? In fact, there is no so what is better to say that the key is how to use, the two of them contain different elements. Potassium nitrate is nitrogen and potassium binary compound fertilizer, potassium dihydrogen phosphate is phosphorus and potassium binary compound fertilizer. Therefore, need to according to different periods, using different products. Potassium nitrate in the nitrate is easy to be leached by rain, it is generally not recommended for use in the paddy fields.
About the potassium nitrate and potassium dihydrogen phosphate, which can be understood when the crop growth with a large amount of nitrogen that the use of potassium nitrate; when crop growth needs more phosphorus that the use of potassium dihydrogen phosphate. Use potassium nitrate in the expansion period, the coloring period use the potassium dihydrogen phosphate. Normal growth period use potassium nitrate, flowering results period use potassium dihydrogen phosphate. Strict sense, the two products can not be regarded as a simple potash. Even potassium dihydrogen phosphate is classified into phosphate fertilizers in many categories.
These two fertilizers are quick fertilizer, and the market price is higher than the average potash fertilizer, so it is not recommended to use base fertilizer, especially potassium nitrate. They are used to do top dressing or fertilization with roots. If the conditions, then you can use the two with, that will be better.
A lot of high-end water-soluble fertilizer liquid potassium phosphite raw materials will use these two things. The most important thing is that the quality of these two things made, as long as the regular manufacturers are also available, there is no need to have to use the import.
3. Potassium Chloride
Potassium chloride appearance of white or light yellow crystal, which containing iron salt was red, it soluble in water easily, and is a high concentration of quick-acting potash. Can be used as base fertilizer and top dressing use, base fertilizer acres of the amount of 8 to 10 kg, topdressing acres of 5 to 7 kg, foliar spray fertilizer 0.5% to 1% is appropriate. The scope of application corresponding to less than potassium sulfate, with particular attention to chlorine-sensitive crops such as watermelon, grapes, potatoes and other crops to guard against use, so as to avoid "chlorine damage." In addition, potassium chloride is not suitable for saline soil, but chloride ion in potassium chloride has the role of promoting photosynthesis and fiber formation, such as linen and other fiber crops is particularly suitable.
The appearance of potassium sulfate is white crystalline or colored crystals or particles. Theoretical potassium containing 54%, generally 50%, which is a chemical neutral, physiological acid fertilizer, has a good water-soluble, the characteristic is with small moisture absorption, not easy to agglomerate when storage, soluble in water easily. Applicable to a variety of crops, can be used for basal fertilizer, top dressing and root top dressing, basal fertilizer in general amount of 10 to 12 kg, topdressing acres of 5 to 7 kg, foliar spray fertilizer 0.5% to 1% is appropriate. Potassium can generally be adsorbed by the soil, will not be lost, but in the poor ability to maintain fertilizer on the sand should also take a "small amount of meals" measures, generally in potatoes, melons and other potassium crops on the best effect.
But long-term use, will increase the soil acidification, suitable for fruit coloring later to fruit ripening period, to promote the fruit powder coloring, increase fruit sweetness. It is said that a lot of fruit trees in the area of manganese poisoning is caused by soil acidification, and soil acidification of a direct cause is the use of potassium sulfate caused by perennial.