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Abstract: Speaking of potash fertilizer, everyone is familiar with it, and it is also the largest fertilizer sold now, here to tell you a few points about the "secret" that potash fertilizer has to say...
1. What kind?
Answer: Potash fertilizer belongs to a strong alkali acid, its name and its corresponding acid root, and nitrate corresponding to potassium nitrate, and sulfate corresponding to potassium sulfate, and hydrochloric acid (also called hydrochloric acid) corresponding to potassium chloride, and carbonate corresponding to potassium carbonate, and phosphate corresponding to potassium phosphate (monosodium phosphate, dipotassium phosphate, tripotassium phosphate, potassium polyphosphate, potassium polyphosphate, etc.), and organic acid corresponding to called organic potassium (potassium formate, potassium acetate, potassium citrate, etc.), and silicate corresponding to called potassium silicate ...
2. Is potassium nitrate the best potassium fertilizer?
A: Non-also! Potassium nitrate is a weapon used by water-soluble fertilizer companies to defeat compound fertilizer enterprises in that specific period (led by chlorine-based and sulfur-based compound fertilizers), and it is a typical case of attacking the weaknesses of opponents with their own advantages.
3. What is the best potash fertilizer?
A: It is difficult to determine whether the fertilizer is good or bad, because there are too many factors involved, and the public is reasonable, and what can be ranked is the price (KCl<K2SO4<KNO3<K2CO3< KH2PO4 <orcaly potassium <polyphosphate), so there is "the potassium in my fertilizer is provided by potassium nitrate or potassium dihydrogen phosphate, no chlorine and no sulfur, the best fertilizer", "Are all good people who drive a good car", the same, Is your composition a good fertilizer? Not necessarily. Combined with factors such as price, nutritional composition, fertilizer properties, application status and other factors, potassium fertilizer is not the best, only the most suitable.
4. Advantages and disadvantages of several common potassium fertilizers?
Potassium nitrate, advantages: moderate price, good solubility, not easy to absorb moisture, neutral fertilizer, provide fast absorption of nitrate nitrogen; disadvantages: dissolved heat absorption to reduce ground temperature, under adversity is easy to cause the accumulation of nitrite in the crop body (organic agriculture is prohibited), nitrate, in the storage and processing process has certain safety hazards.
Potassium chloride, advantages: low price, high potassium content, good solubility, neutral fertilizer; disadvantages: dissolved heat absorption, easy moisture absorption, chlorine, a large number of long-term application has certain side effects.
Potassium sulfate, advantages: low price, high potassium content, not easy to absorb moisture, can provide sulfur elements; disadvantages: dissolved heat absorption, its own weak acidity, belongs to the physiological acid fertilizer, the sulfur contained is easy to combine with calcium to form a micro-soluble calcium sulfate, after application can cause soil acidification and compaction.
Potassium dihydrogen phosphate, advantages: not easy to absorb moisture, high total content of phosphorus and potassium, is the current high content of powder water-soluble fertilizer in the necessary raw materials; disadvantages: dissolved heat absorption, its own weak acidity, belonging to physiological acidic fertilizer, poor phosphorus mobility is easy to be fixed, after application can cause soil acidification and compaction.
Potassium carbonate, advantages: high potassium content, alkaline, after application can reduce acidity and release CO2, increase the concentration of local microenvironment CO2, enhance photosynthetic strength; disadvantages: easy moisture absorption, easy flatulence, strong corrosiveness.
Organic potassium, advantages: alkaline fertilizer, can reduce soil acidity, provide a large number of quick-available carbon fertilizer; disadvantages: easy to absorb moisture, high price.
Potassium polyphosphate, advantages: high phosphorus and potassium content, dissolved exothermic, alkaline, good mobility of phosphorus, high utilization rate, acid reduction after application, fluffy soil, improved soil, and fast and long-term effect; disadvantages: easy to absorb moisture, high price. After the advantages and disadvantages are said, the choice is flexibly mastered by themselves in combination with the specific situation.
5. Do you need to "solve potassium"?
A: NO! Often see some packaging on the "phosphorus solution potassium" words, this is a kind of inertia, potassium does not need to be solved, because the potassium salt is not unhydrably soluble (potassium sodium ammonium salt is dissolved), in the case of sufficient water, grasp still can not grasp, solve it dry? The key to potash is retention (coating or grasping with polymers).
6. The more potassium fertilizer is used, the faster the expansion of the fruit?
A: It depends. There are many factors and elements involved in the expansion of the fruit (explained in detail later), and many times the fruit does not grow much, not because of potassium deficiency, but of excessive potassium application.
conclusion:
1, potassium fertilizer has no high and low, only the difference between expensive and low, after application, the effect should be combined with water, temperature, crop and soil status specific problems specific analysis.
2. In the case of low temperature, high humidity, compaction, acidification and salt wringing, it is recommended to apply potassium carbonate, organic potassium and (poly)potassium polyphosphate, and to choose a good period, an appropriate amount of multiple times, as needed.
3, potassium to a certain extent equivalent to the role of sodium on people, is to adjust the osmotic pressure, maintain the appropriate body fluid concentration, promote the normal progress of metabolism, "observe crop growth, understand the soil condition, accurate selection and application" is very critical.
The source of this article: "Moore Liquid Fertilizer" WeChat public account, http://www.dwz.cn/3DbuBk
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