What are alkaline fertilizers? What does alkaline fertilizer mean?

Hello, alkaline fertilizer refers to the pH of fertilizer is alkaline, common alkaline fertilizer is nitro compound fertilizer, common grass ash in rural areas, or quicklime seen in quarries.

First, the types of alkaline fertilizers.

1. Nitro compound fertilizer: Nitro compound fertilizer is a compound fertilizer that uses ammonium nitrate as a nitrogen source and adds phosphorus and potassium elements, and the concentration of nitrogen, phosphorus and potassium is relatively high.

Nitro compound fertilizer is an important agricultural fertilizer, mostly used in alkaline soil areas, and is also suitable for crops such as tobacco, corn, melons, fruits and vegetables.

2. Grass ash: As the name suggests, plant ash is the ash after the burning of dead branches and leaves, which contains the mineral elements required by plants, and the main component of plant ash is potassium carbonate, and its fertilization effect is better than that of chemical fertilizers.

Grass ash can effectively prevent soil compaction, enhance the stress resistance of plants, and inhibit the occurrence of some diseases when sprinkled around plant roots.

3. Quicklime: Quicklime is also known as burnt lime, and its main component is calcium oxide. Quicklime neutralizes soil acidity.

2. Definition of alkaline fertilizer

Fertilizer is divided into two categories: acidic fertilizer and alkaline fertilizer, alkaline fertilizer refers to the pH value is alkaline, most of the fertilizer in the daily fertilizer types belong to alkaline fertilizer, planting friends understand the acidity and alkalinity of the fertilizer is very important, so as to better combine the soil conditions for the crop to supplement nutrients.

Notes:

1. Soil characteristics.

When using alkaline fertilizer, attention should be paid to the soil situation, for acidic soil, acidic fertilizer should be refused, the same for alkaline soil can not blindly use alkaline fertilizer, the soil in northern China is mainly weakly alkaline, fertilization should pay more attention, you can apply Haihewei microbial agent to regulate and activate the soil.

2. Fertilizer mixing.

When using alkaline fertilizers, you should pay attention to the soil conditions, alkaline fertilizers can not be mixed with ammonium fertilizers, because the mixing of the two will produce ammonia, resulting in nitrogen loss and reducing the effect of fertilizers.

Chemical fertilizer acidity and alkalinity refers to the acidity and alkalinity of fertilizer dissolved in water, according to this definition, fertilizer can be divided into chemical acid fertilizer, chemical alkaline fertilizer, chemical neutral fertilizer. Ammonium sulfate, superphosphate, etc., dissolved in water acidic or weakly acidic fertilizers are chemical acid fertilizers; Ammonia, potassium carbonate, etc., fertilizers that are alkaline or weakly alkaline when dissolved in water are called chemical alkaline fertilizers.

There are a lot of alkaline fertilizers, so alkaline means that the underground soil is acidic, so alkaline land is easy to facilitate the growth of plants, so the use of alkaline fertilizer has a certain maintenance effect on the soil, if you say. Then alkalinity means that the underground soil is acidic, so alkaline land is easy to facilitate the growth of plants, so the use of alkaline fertilizer has a certain maintenance effect on the soil, if it is said.

It is also easy to benefit the growth of plants, so the use of alkaline fertilizer has a certain maintenance effect on the soil, if the soil is more acidic, then it is difficult to let crops earn. It grows strongly, so alkaline fertilizers are very good.

This means that if you use alkaline fertilizer, it will make your alkaline fertilizer more in the soil.

Compound fertilizers are mostly salts, alkaline or acidic, depending on its hydrolysis.

For example, ammonium dihydrogen phosphate and diammonium hydrogen phosphate are moderately strong acids and weak alkali salts, phosphoric acid is a moderately strong acid, and ammonium hydroxide is a weak alkali, so it is moderately strong acidic after hydrolysis.

Potassium dihydrogen phosphate is a moderately strong acid and strong alkali salt, phosphoric acid is a moderately strong acid, and potassium hydroxide is a strong alkali, which is alkaline after hydrolysis.

Another example is potassium nitrate, which is a strong acid and strong alkali salt, nitric acid is a strong acid, and potassium hydroxide is a strong base, which does not undergo hydrolysis in the solution, and the solution is neutral.

I hope I can help you with your doubts.

This needs to be analyzed on a case-by-case basis.

The research and development of compound fertilizers should also be subdivided.

Different types of compound fertilizers should be manufactured for acidic soils and for alkaline soils.

Alkaline fertilizers

Alkaline fertilizers mainly include calcium, magnesium and phosphate fertilizers, plant ash, ammonium bicarbonate, sodium nitrate, potassium nitrate, nitro compound fertilizer, ammonia, etc. They are alkaline when dissolved in water.

Alkaline fertilizer should not be mixed with ammonium fertilizer, available phosphate fertilizer, and well-rotted organic fertilizer, otherwise it will cause a reduction in fertilizer efficiency and is not conducive to crop growth.

Acidic soils should avoid the use of physiological acid fertilizers, especially to reduce the use of fertilizers such as sulfuric acid compound fertilizers. Nitrogen fertilizer should also be applied in moderation, as too much nitrogen fertilizer can lead to soil acidification. Soil acidification can also be mitigated through the use of organic fertilizers, straw returning and other methods.

Precautions for alkaline fertilizers.

1. The application of alkaline fertilizer should be adapted to local conditions. Taking into account the characteristics of the soil, the use of physiological acidic fertilizers should be avoided in acidic soils, especially the use of fertilizers such as sulfuric acid compound fertilizers. Physiological alkaline fertilizers can be used.

2. Pay attention to the compatibility of fertilizers. Alkaline fertilizers cannot be mixed with ammonium fertilizers, and the mixing of the two will produce ammonia volatilization, resulting in nitrogen loss and reducing fertilizer efficiency.

Can not be mixed with the well-rotted organic fertilizer, the organic fertilizer with high maturity contains more available nutrients, of which nitrogen mostly exists in the form of ammonium nitrogen, if mixed with alkaline fertilizer, it will cause the volatilization of ammonia and reduce the nutrient content of organic fertilizer. It can not be mixed with some pesticides, such as tobuzin, carbendazim, leafhopper powder, dimethoate, etc., otherwise it will reduce the efficacy.

The use of fertilizers should also be selected according to the land conditions and crop needs, and generally speaking, the same acidic and alkaline soil and fertilizers should not be matched together.

Classification: According to the category: the main materials contained in the fertilizer are classified according to the chemical properties of the fertilizer, and the chemical properties of the fertilizer are alkaline fertilizers. Such as ammonium bicarbonate, calcium, magnesium and phosphorus fertilizer, ammonia and liquid ammonia. Acidic fertilizers: Chemically acidic fertilizers.

Such as potassium dihydrogen phosphate, superphosphate, phosphate nitrate fertilizer, zinc sulfate, manganese sulfate, copper sulfate, etc. Neutral fertilizers are chemically neutral or near-neutral fertilizers. Such as potassium sulfate, potassium chloride, potassium nitrate, urea, etc.

According to the nature of the reaction, the physiological alkaline fertilizer is classified as a fertilizer that reduces the acidity of the growth medium due to the residual part after the nutrients are absorbed and utilized by the crop. Such as sodium nitrate, dicalcium phosphate, calcium, magnesium phosphate fertilizer, etc. Physiological acidic fertilizer is a fertilizer that leads to the increase of the acidity of the growth medium after the nutrients are absorbed and utilized by the crop.

Such as ammonium chloride, ammonium sulfate, potassium sulfate, etc. After the nutrients of physiological neutral fertilizer are absorbed and utilized by crops, there is no residual part or the residual part basically does not change the acidity of the growth medium. Such as ammonium nitrate, urea, ammonium bicarbonate, etc.

Common Fertilizer Classification Methods (continued)-3

Most potash fertilizers are alkaline fertilizers; Alkaline fertilizers refer to fertilizers that exhibit alkaline reactions. It can be divided into two categories: chemical alkali fertilizer and physiological alkali fertilizer. For example, sodium nitrate, potassium nitrate, nitro compound fertilizer, vegetable ash, quicklime, etc. are all alkaline fertilizers.

Although now some manufacturers are promoting, the heat of alkaline fertilizers continues to rise. However, the land area is large, and the soil pH in most parts of the north is weakly alkaline. Therefore, the use of alkaline fertilizers should be judged on a case-by-case basis.

Summary. 1. Organic fertilizer, a large amount of organic fertilizer is applied to increase soil organic matter, which can improve the physical and chemical properties of the soil. The effective method to improve the physical and chemical properties of alkaline soil is pine coniferous soil and green manure, which is made of pine needles, fallen leaves, weeds and other residual branches and dead leaves, which can neutralize alkaline soil.

Second, the application of acidic fertilizers, alkaline soil application of superphosphate and diammonium phosphate effect is better, top dressing should use ammonium sulfate and potassium sulfate and other fertilizers, these fertilizers can neutralize alkaline soil.

3. Soil amendment, the use of gypsum or phosphogypsum mixed with crop straw applied to the soil, this combination of chemical and physical methods, can effectively improve soil compaction, the effect is better.

What kind of fertilizer is good for alkaline soil?

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Hello, I have found the following information for you.

1. Organic fertilizer, a large amount of organic fertilizer is applied to increase soil organic matter, which can improve the physical and chemical properties of the soil. The effective method to improve the physical and chemical properties of alkaline soil is pine coniferous soil and green manure, which is made of pine needles, fallen leaves, weeds and other residual branches and dead leaves, which can neutralize alkaline soil. Second, the application of acidic fertilizers, alkaline soil application of superphosphate and diammonium phosphate effect is better, top dressing should use ammonium sulfate and potassium sulfate and other fertilizers, these fertilizers can neutralize alkaline soil.

3. Soil amendment, the use of gypsum or phosphogypsum mixed with crop straw applied to the soil, this combination of chemical and physical methods, can effectively improve soil compaction, the effect is better.

Generally, the application of base fertilizer should be applied to the deep layer, that is, 20 cm below the ground, organic fertilizer, microbial fertilizer, trace fertilizer, potassium fertilizer, etc. can be sprinkled into the soil, which is conducive to direct absorption by plants.

<> urea is an alkaline fertilizer, urea is weakly alkaline, because urea contains amino groups, and urea will be close to neutral in aqueous solution. Urea is a white crystal, mainly composed of carbon, helium, hydrogen, etc., urea is a metabolite of animal protein.

Extended Material: <>

1. Medical Applications:

Test for Helicobacter pylori.

The presence of carbon-14-breath test, using the presence of carbon-14

or carbon-13-labeled urea. Because H. pylori's urease uses urea to make ammonia to raise the pH of its surrounding stomach.

The same principle can be used to test similar bacteria that live in the stomachs of animals.

2. Agricultural Applications:

It is a neutral fast-acting fertilizer, and can also be used to produce a variety of compound fertilizers.

No harmful substances remain in the soil, and there are no adverse effects after long-term application. Animal husbandry can be used as ruminants.

of feed. However, if the temperature is too high in granulation, a small amount of biuret will be produced, also known as biuret, which has an inhibitory effect on crops. China stipulates that the content of urea biuret for fertilizer should be less than.

When the content of biuret is more than 1%, it can not be used as seed fertilizer, seedling fertilizer and foliar fertilizer, and the urea content in other application periods should not be too much or too concentrated.

Urea is an organic nitrogen fertilizer that passes through urease in the soil.

action, hydrolysis into ammonium carbonate or ammonium bicarbonate.

After that, it can be absorbed and utilized by crops. Therefore, urea should be applied 4 to 8 days before the fertilizer requirement of the crop.

3. Commercial Applications:

Raw materials for special plastics, especially urea formaldehyde resins.

Raw materials for certain glues.

Composition of fertilizers and feed.

Instead of antifreeze salt sprinkled on the streets, the advantage is not to corrode the metal.

Strengthens the smell of cigarettes.

Gives industrially produced pretzels a brown color.

Ingredients in certain shampoos and cleansers.

Ingredients for refrigeration kits for emergency use, because urea reacts with water to absorb heat.

Treatment of exhaust gases from diesel, engines, and thermal power plants can reduce nitrogen oxides in particular.

Ingredients of rain boosters.

In the past, it was used to separate paraffin wax because urea can form claths.

Urea is weakly alkaline and is close to neutral in aqueous solution.

Urea is neither an acidic nor an alkaline fertilizer and is a neutral fertilizer.

Urea, also known as carbaamide, is an organic compound composed of carbon, nitrogen, oxygen, and hydrogen, which is a white crystal. One of the simplest organic compounds, it is the main nitrogen-containing end product of protein metabolism in mammals and some fish. It is also the nitrogen fertilizer with the highest nitrogen content at present.

Urea. Of course, it is weakly alkaline, and the structural formula of urea is shown in the figure below

Urea structure.

Ketones. An amine group is attached to each side, and the amine group can provide lone pairs of electrons in the aqueous solution to absorb a hydrogen ion, which also accelerates the water molecule.

ionization. Therefore, naturally, there are more hydroxide ions in the water. Urea needs to be absorbed by crops in an aqueous solution environment, so urea is a weakly alkaline fertilizer.

The human body is alkaline, so urea is alkaline.

Most compound fertilizers are alkaline, and a few are acidic. Compound fertilizer is a chemical fertilizer made of two or more nutrients, and the general raw material contains sodium nitrate.

Calcium nitrate is an alkaline fertilizer, and the raw material contains ammonium sulfate.

Ammonium chloride and the like are acid fertilizers.

Compound fertilizers are divided into physiological acidic fertilizers and physiological alkaline fertilizers. Due to the unequal number of anions and cations in the chemical nitrogen fertilizer absorbed by crops, when the absorption of cations is more than anions.

Fertilizers that acidify the soil are called physiological acid fertilizers.

Generally speaking, acidic soils should be alkaline or physiological alkaline fertilizers, such as sodium nitrate, calcium nitrate, etc. If there is no choice, attention should be paid to the application of organic fertilizer or lime to reduce the effects of acidification.

Alkaline soil should be selected physiological acid fertilizers, such as ammonium sulfate, ammonium chloride, etc. For saline land.

Although there is no problem of soil acidification, ammonium chloride and sodium nitrate should not be applied to avoid the harm caused by excessive chloride and sodium ions.

Most compound fertilizers are alkaline, and a few are acidic. Compound fertilizer is a chemical fertilizer made of two or more nutrients, generally raw materials containing sodium nitrate, calcium nitrate, etc. belong to alkaline fertilizers, raw materials containing ammonium sulfate, ammonium chloride, etc. belong to acidic fertilizers.