A list of the contents of this article:

Which are phosphate fertilizers? introduction to phosphate fertilizers.

1. Phosphate fertilizer (phosphate fertilizer) is a fertilizer with phosphorus as the main nutrient, which mainly comes from two sources, one is natural phosphate fertilizer, such as seabird manure, animal bone meal and fish bone meal, and the other is chemical phosphate fertilizer. such as calcium superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder and so on.

2. There are two kinds of phosphate fertilizer according to the source, which are natural phosphate fertilizer and chemical phosphate fertilizer. Among them, natural phosphate fertilizer is the feces of seabirds, animal bones and fish meal, chemical phosphate fertilizer is industrial fertilizer, there are calcium superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder and so on.

3. Phosphate fertilizer is a kind of fertilizer with phosphorus as the main nutrient. Phosphate fertilizer mainly includes three kinds, one is water-soluble phosphate fertilizer, the second is wolfberry-soluble phosphate fertilizer, and the third is insoluble phosphate fertilizer. Water-soluble phosphate fertilizer refers to ordinary calcium superphosphate, calcium phosphate, such as monoammonium phosphate, diamine phosphate and so on.

There are several kinds of phosphate fertilizer

There are three main types of phosphate fertilizer. The three main types of phosphate fertilizer are water-soluble phosphate fertilizer, wolfberry-soluble phosphate fertilizer and insoluble phosphate fertilizer. Their main components are phosphorus, but their fertilizer efficiency and application methods are different due to different solubility.

Calcium magnesium phosphate fertilizer: it contains a variety of nutrient elements, which can not only provide phosphorus for crops, but also supplement calcium, magnesium and other trace elements. The effect of calcium magnesium phosphate fertilizer is long-lasting and can meet the phosphorus demand of the whole growth cycle of crops. In addition, it can improve soil structure and improve the ability of soil water and fertilizer conservation.

The types of phosphate fertilizer are as follows: water-soluble phosphate fertilizer: water-soluble phosphate fertilizer refers to ordinary calcium superphosphate, calcium phosphate, such as monoammonium phosphate, diamine phosphate and so on. The main ingredient is monocalcium phosphate, which is easier to dissolve in water and has a faster fertilizer effect. It is usually used in all kinds of soil and crops.

There are three types of fertilizer, and which kind of phosphate fertilizer is the best depends on the specific application scenarios and requirements. Water-soluble phosphate fertilizer: this type of phosphate fertilizer dissolves easily in water, so the fertilizer effect is faster. For example, ordinary superphosphate and heavy superphosphate.

Which kinds of phosphate fertilizer can be selected for the preparation of soilless vegetable nutrient solution? What are the characteristics?

1. In the preparation of nutrient solution in soilless cultivation, commonly used phosphate fertilizers are potassium dihydrogen phosphate, ammonium dihydrogen phosphate, diammonium phosphate, calcium superphosphate, etc. The molecular weight of potassium dihydrogen phosphate is 13609, the pure phosphorus content is 2270%, the potassium content is 2873%, it is a white crystalline powder, the property is stable and soluble in water can provide both phosphorus and can.

2. ① calcium magnesium phosphate fertilizer is alkaline, and acidic soil is the most suitable, and mixed barnyard manure increases the effect of insoluble water containing phosphorus. Because it contains calcium, magnesium and manganese, as well as silicon fertilizer and copper; it is suitable for rape, silkworm, pea, fruit trees and grains. ② steel slag phosphate fertilizer steel slag phosphate fertilizer alkali furnace slag, acid soil like it; ash-black powder contains low phosphorus, so it is suitable to be used as base fertilizer.

3. formulation and use of nutrient solution for soilless cultivation the basis and requirements of nutrient solution combination should be based on the actual needs of crops for various nutrient elements on the one hand and the fertilizer absorption characteristics of crops on the other hand. In soilless culture, nutrient solution is the only source of crop root nutrition.

4. There are three main cultivation methods of soilless cultivation, which are water culture, aerosol culture and substrate cultivation.

5. Physical and chemical properties, calcium magnesium phosphate fertilizer is a kind of aluminosilicate vitreous body containing phosphate (PO43-), which is slightly alkaline (pH8~5). According to the different raw materials and operating conditions, the finished product is gray, light green, dark green and dark brown fine powder.

6. The demand and proportion of nutrient elements in different growth and development stages of the same crop are different. The other is the characteristics of the cultivation substrate, including the physical and chemical properties, water characteristics, nutrient adsorption properties and so on. The third is the quality of water for the preparation of nutrient solution. The standard formula of nutrient solution for soilless culture of cucumber and tomato is shown in Table 2.

What are the nitrogen, phosphate and potash fertilizers for the production of compound fertilizer?

Phosphate fertilizer: calcium phosphate, heavy superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder, calcium phosphate, heavy superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder. Potash fertilizer: potassium chloride, potassium sulfate, plant ash, potassium Epsom salt, potassium phosphate, potassium salt, potassium magnesium salt, carnallite, kiln ash potash fertilizer.

② nitrogen, phosphorus and potassium compound fertilizer KH2PO4: contains about 10% of nitrogen, phosphorus and potassium, light brown particles. Nitrogen and potassium are all water-soluble, and part of phosphorus is water-soluble. It is mainly used as base fertilizer, 667 square meters and 25,30kg.

The raw materials commonly used in the production of compound fertilizer are diammonium phosphate, monoammonium phosphate, nitrophosphate, potassium nitrate and potassium dihydrogen phosphate. This kind of compound fertilizer contains two or more elements needed by crops, has a high nutrient content, and can supply nutrients needed by crops for a relatively balanced and long time, so as to improve the yield-increasing effect of fertilization.

Phosphate fertilizer raw materials: monoammonium phosphate (46%), diammonium phosphate (38%), calcium hydrogen phosphate, calcium superphosphate (12%), calcium magnesium phosphate fertilizer (13%), general calcium, heavy calcium, ammonium nitrate phosphate fertilizer (10) and other potassium fertilizer raw materials: potassium chloride (57%), potassium sulfate (45%) and potassium magnesium sulfate (21%), etc.

Nitrogen fertilizer (promote luxuriant branches and leaves): such as sesame residue sauce, ruined beans and peanuts, human urine and so on. Phosphate fertilizer (to promote bright colors and fruit hypertrophy): such as smashing the meat and fish bones fermented with water, fish bones, fish scales, rice washing water and so on. Potash fertilizer (promotes root health): such as plant ash.

Chemical fertilizer is one of the most common fertilizers, which is characterized by high content of nutrient elements, fast fertilizer efficiency, easy storage and convenient use. Chemical fertilizers mainly include nitrogen fertilizer, phosphate fertilizer, potash fertilizer, compound fertilizer and so on. Nitrogen fertilizer: nitrogen is one of the important elements needed for crop growth, which mainly promotes stem and leaf growth and protein synthesis of crops.

What are the phosphate fertilizers?

Including calcium magnesium phosphate fertilizer, calcium hydrogen phosphate, precipitated phosphate fertilizer and steel slag phosphate fertilizer and so on. This kind of phosphate fertilizer is insoluble in water, but it is dissolved by weak acid in the soil and absorbed by crops.

The three main types of phosphate fertilizer are water-soluble phosphate fertilizer, wolfberry-soluble phosphate fertilizer and insoluble phosphate fertilizer. Their main components are phosphorus, but their fertilizer efficiency and application methods are different due to different solubility. Water-soluble phosphate fertilizer: this type of phosphate fertilizer is mainly composed of water-soluble phosphorus compounds, such as calcium phosphate.

The common phosphate fertilizers are calcium dihydrogen phosphate and calcium hydrogen phosphate, and their molecular formulas are Ca (H2PO4) CaHPO4 respectively.

Chinese wolfberry soluble phosphate fertilizer: it refers to calcium magnesium phosphate fertilizer, precipitated phosphate fertilizer, calcium hydrogen sulfate and so on, which is mainly composed of dicalcium phosphate. Its fertilizer effect is slower than the first one, and the soil environment used is different, so it is more suitable for acidic soil.

The commonly used phosphate fertilizers used in the preparation of nutrient solution in soilless cultivation are potassium dihydrogen phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate and calcium superphosphate. (1) potassium dihydrogen phosphate. The molecular weight is 1309, the pure product contains 270% phosphorus and 273% potassium. It is a white crystalline powder, stable and soluble in water.

Phosphate fertilizer includes: natural phosphate fertilizer, such as seabird manure, animal bone meal and fish bone meal, etc. Third, potash fertilizer includes potassium brine, potassium brine includes potassium lake water, potassium well water and salt field brine. Israel and Jordan use the Dead Sea brine, while China uses the brine of Chaerhan Salt Lake in Qinghai Province to produce potassium chloride.