SK1872015U1 - Liquid concentrates of secondary and/or trace of plant nutrients and their use - Google Patents

Abstract

Disclosed are liquid concentrates secondary and/or trace plant nutrition intended for foliar - leaf nutrition and also as a source of macronutrients in the preparation of multi-component liquid fertilizers which contain plant nutrients bound in the form of complexes of aminopolycarboxylic acids, and for these concentrates is specific in that they contain reaction products aminopolycarboxylic acids with amines or hydroxylamines.

Description

Liquid concentrates of secondary and / or trace plant nutrients and their use

Technical field

The solution relates to liquid concentrates of secondary and / or trace elements based on aminopolycarboxylic acid complexes. Concentrates are characterized as containing reaction products of aminopolycarboxylic acid complexes with at least one of the amines or hydroxyamines. The concentrates are preferably useful for off-root foliar nutrition of plants and also as a source of appropriate nutrients in the preparation of compound fertilizers.

Prior art

Plants consist of the same elements as inanimate nature, and the formation of plant matter is the result of complex transformations of substances from the environment surrounding plants and energy. Currently used chemical analysis has made it possible to detect more than 75 elements in plants, not all of which are equally important for plant life.

In terms of their content and importance for plants, they are most often divided into basic, sometimes also referred to as macroelements, secondary elements, trace so-called. microelements, ultramicroelements and useful elements. The secondary elements usually include calcium (Ca), magnesium (Mg) and sometimes also sulfur (S), which is currently usually included among the basic, so-called building macroelements. Although many microelements are not closed, key trace elements include: iron (Fe), boron (boron), manganese (Mn), zinc (Zn), copper (Cu), molybdenum (Mo) and cobalt (Co).

Plants take about 1000 times less microelements compared to macroelements (nitrogen, phosphorus, potassium and sulfur).

Each biogenic element must be present in the nutrient medium of the plants in a certain minimum dose, none of which is substitutable for another biogenic element. It may happen that the intake of a certain plant nutrient from the soil is so strongly inhibited due to the antagonism of the elements that the plant suffers from its deficiency. The intake of nutrients from the soil is also very significantly affected by the chemical reaction (pH) of the soil.

In intensive crop cultivation, the lack of secondary and trace elements can be a limiting factor in the yield and quality of cultivated plants.

In order to increase the availability of some plant elements, it is advantageous if they are bound in a complex form. A special type of complexes are the so-called chelates formed by complexing reactions. In these reactions, the so-called the central atom, whose electron shell is able to receive electrons, combines with the particles of the so-called ligands having at least one free electron pair available. The ligands thus provide a central atom, resp. ion electrons as a result of which a dative bond is formed. The central ions are most often cations, while the ligands are anions or neutral molecules of dipolar character.

Examples of complex-forming reactions are the following processes:

central ion (atom) ligand complex Fe 2+ + 6CN- -> / Fe (CN) _e / 4- Co2 + + 6NH ₃ -> ZCo (NH ₃ ) e / 2 + H + + h ₂ o —► / H ₃ O / + Ni + 4 CO —► / Ni (CO) ₄ /

i

The above reaction schemes represent the simplest complex-forming reactions. Some ligands, especially complex organic molecules, are able to occupy more coordination sites of the central atom because they have several groups with free electron pairs. Such substances are commonly referred to as polydonor ligands. Reactions of polydonoral ligands with one central particle (metal ion) form cyclic complexes, referred to as chelates.

The name chelate is derived from the Greek word "chelé" - claw, as the central atom in the cyclic complex is bound by two or more bonds to the molecule of the complexing chelating agent (ligand) as claws.

Chelates are used to increase the efficiency of delivering certain plant nutrients to an environment where they are unacceptable or poorly acceptable to plants under normal conditions. The chelate bond ensures effective protection of the biogenic element, which forms the central atom in the complex, from the adverse effects of the environment, while the plant can accept the element from the complex - chelate. Some plant nutrients are found naturally bound in chelates, with amino acids, polysaccharides, high molecular weight sulfur-containing substances, saponins, organic acids, polyhydric alcohols, and the like usually serving as natural complexing compounds in plants and microorganisms.

Chelates are used in construction chemistry, in the production of detergents for industry and household, in the food industry, as additives in the production of feed, in natural gas cleaning, in leather processing processes, in the electrical industry, in metal separation, in petrochemistry, in photographic processes, in the production of printing inks and inks, in the production of pulp and in the textile industry, and also in connection with plant nutrition in agriculture.

In order to ensure the highest possible efficiency, especially of trace plant nutrients of microelements, the use of a wide range of complex compounds has become widespread in agriculture. In addition to several complexing agents of native origin, such as citrates, lignosulfonates, various polysaccharides and saponins, chelating agents formed by a combination of amines and carboxylic acids - so-called aminopolycarboxylates, known in the art as "APO". These form stable complexes with metal ions, and the resulting chelate complexes are characterized by good stability over a wide range of temperatures and pH and are also inert in most chemical environments.

A variety of aminopolycarboxylate type chelating agents include nitrilotriacetic acid (H3-NTA), ethylenediaminetetraacetic acid (H4-EDTA), diethylenetriaminepentaacetic acid (Hs-DTPA), 1,3-propylethylenediaminetiacamate -HEDTA) and others.

Amino polycarboxylate chelate complexes based on EDTA (I) and DTPA (II) are most commonly used in connection with plant nutrition.

HO-C-CH, CHp-C-OH

N — CH — CH—

HO-C-CH, CH-C-OH

H Π

Both types of aminopolycarboxylic acids, although commercially available in the form of free acids, are usually offered by their manufacturers in the form of their ammonium and alkali metal salts, predominantly sodium. There are also final complexes of copper, manganese, zinc, iron, magnesium and calcium on the market.

The disadvantage of the offered metal complexes is that during their preparation free hydrogen cations are formed, which need to be neutralized. This fact is evident from the structures of the complexes that are formed during the binding of divalent metal cations using EDTA as well as iron chelate using DTPA.

CH, COO-

.. _ ^ C = O

HOOCCH ₂ O \

X ^c 7'ch ₂ oc. _ó /._>.^ch ₂ oh ₂ ó \ cťo CH ₂ COO

For neutralization, one of the basic-reactive sources of alkali metal (usually sodium) or ammonia or ammonium hydroxide is generally used. The consequence of this is that the offered final complexes - chelates are always a source of the appropriate alkali metal or ammonium. Examples are summary formulas given by their manufacturers: /EDTA.Ca/Na ₂ , /EDTA.Cu/(NH4) ₂ , /EDTA.Zn/Na ₂₁ /EDTA.Mn/.Ks, /DTPA.Fe/Na ₂ , /EDTA.Fe/NaJHzO and others.

A significant shortcoming of the final complexes - chelates mentioned in the offers of their manufacturers is the relatively high content of sodium cation in most products of this type. Sodium is a ballast - an undesirable element for most agricultural crops, which causes salinization of the soil and growing media, and in off-root application it is often the cause of increased necrotic effect of applied preparations. The presence of currently used neutralizing components negatively affects the concentration of the complexed biogenic element, while very often also negatively affects the solubility of the complex in water. Many of the chelates of the final type are offered in solid form - as powders or microgranules. Their insulation in the solid state from the originally liquid form is usually very energy and technologically demanding, which of course must be reflected in their price. This fact is all the more contradictory if we realize that in connection with the preparation of application mixtures, chelates in solid form must be reconverted into a liquid form - an aqueous solution.

The essence of the technical solution

It has now been found that disadvantages in the preparation and use of complexed secondary and / or trace elements containing biogenic elements in the form of aminopolycarboxylic acid complexes can be overcome by using this solution.

It is characteristic of the products according to the invention that they contain products of reactions of aminopolycarboxylic acids with one of the amines or hydroxymins. In the preparation of a complex of biogenic elements bound in the form of aminopolycarboxylic acid complexes according to the invention, one of the amines or hydroxypmines is used instead of the basic substances which are then the source of the alkali metal or ammonia in order to neutralize the hydrogen cations released during the complexation reactions.

It has been experimentally confirmed that by using amines or hydroxyamines for neutralization, a significantly higher phase and chemical stability of the chelate thus prepared can be achieved, while it is possible to prepare liquid concentrates in the nature of true clear solutions.

The concentration of biogenic elements in the liquid concentrates of secondary and / or trace elements thus obtained is significantly higher than usual for liquid concentrates of a comparable type.

A great advantage of liquid concentrates according to the solution is the fact that in their preparation according to the solution they are obtained in concentrated liquid form, while the reaction product, which can be advantageously carried out in one technological step, is characterized by high phase and chemical stability.

From the point of view of the practical use of liquid concentrates in terms of the solution, it has proved to be particularly important if they contain at least one of the following central atoms: manganese (Mn), zinc (Zn), iron (Fe), copper (Cu), cobalt (Co), calcium (Ca) and magnesium (Mg).

From a production and economic point of view, it is advantageous if the liquid concentrates according to the invention contain the reaction products of ethylenediaminetetraacetic acid - EDTA (CAS No .: 60-00-4) or diethylenetriaminepentaacetic acid - DTPA (CAS No .: 67-43-6).

Similarly, it has been shown to be advantageous to use ethanolamine (2-aminoethanol, monoethanolamine, colamine) NH2 .CH2. CH2.CH2. CH2.NH2, C ₂ H ₈ N 2, triethanolamine (HO.CH ₂ .CH ₂₎ 3 N, CEH ₁₅ NO _3, and triethylamine (C 2 H) ₃ N, CeHisN, diethanolamine HN (CH2CH2OH) 2, methylamine (aminomethane) CH ₃ NH2. Experimentally, it has been shown to be particularly advantageous to use ethanolamine (2-aminoethanol, 2-aminoethyl alcohol, monoethanolamine, colamine) NH 2 .CH 2 .CH 2 .OH (CAS No .: 141-43-5) to neutralize the reaction mixture.

The use of said strongly basic compounds acts synergistically on the stability of the resulting complex compounds of biogenic elements and the properties of the liquid concentrates according to the solution.

Liquid concentrates according to the solution can have a practically neutral chemical reaction and are freely miscible not only with water, but also with practically all liquid fertilizers and in the form of application solutions also with almost all plant protection preparations. It has also been shown that liquid concentrates of this type, after appropriate dilution, are very suitable for extra-root - foil plant nutrition, both in the form of preventive and curative applications of secondary and trace plant nutrients.

It is also expedient to use them as liquid intermediates in the preparation of compound fertilizers, while allowing the preparation of liquid fertilizers of various compositions and purposes.

Examples of embodiments

The examples given in the following section aim to clarify the essence of the solution and document the wide possibilities of its practical use. However, in no case may they limit the rights to its protection.

Example 1

In order to prepare a liquid concentrate containing complexed iron, manganese, zinc and copper based on ethylenediaminetetraacetic acid (EDTA), 8.95 kg of water were introduced into a stainless steel reactor equipped with a stirrer and the following were gradually added with stirring:

22.5 kg of crystalline ethylenediaminetetraacetic acid (H4-EDTA),

3.8 kg of manganese sulphate monohydrate (MnSCUH2O),

4.4 kg of copper sulphate pentahydrate (CuSO ₄ .5 H ₂ O),

3.2 kg of zinc sulphate monohydrate (ZnSO ₄ .H ₂ O) and 5.3 kg of ferrous sulphate heptahydrate (FeSCX1 H2O).

The light blue crystalline suspension, which formed after thorough mixing of the mixture, had a markedly acidic chemical reaction.

In order to neutralize the mixture, 10.15 kg of monoethanolamine were further added gradually, which contained min. 99.5% active ingredient (MEA). During the addition of ethanolamine, the initially light blue crystalline mixture first darkened markedly, gradually thinned and became completely clear. Due to the release of heat of neutralization, the reaction mixture was significantly heated, while its temperature reached about 55 ° C.

A liquid concentrate containing complexed iron, manganese, zinc and copper, which additionally contained amide nitrogen and plant-accessible sulfur, was prepared by the above procedure. The prepared concentrate had the character of a dark green-blue, clear and relatively viscous solution, which was storable for a long time without observing its phase change. The prepared liquid concentrate according to the solution showed only a weakly basic chemical reaction (pH of the undiluted concentrate: 8.06 / 30.1 ° C).

Example 2

In order to prepare a liquid concentrate containing amide nitrogen and complexed microelements as in Example 1, which was intended for preventive fertilization of cereals by foliar application at a rate of 3 liters of concentrate in 400 liters of water per hectare, the procedure was as follows.

14.0 kg of water were introduced into a stainless steel reactor equipped with a stirrer, and the following were gradually added with stirring:

24.38 kg of crystalline ethylenediaminetetraacetic acid (H4-EDTA),

4.16 kg of manganese sulphate monohydrate (MnSO4.H ₂ O), 4.81 kg of copper sulphate pentahydrate (CuSO ₄ .5 H ₂ O), 3.46 kg of zinc sulphate monohydrate (ZnSCU.hhO) and 5.73 kg of heptahydrate ferrous sulphate (FeSO ₄ .7 H ₂ O).

The light blue crystalline suspension, which formed after thorough mixing of the mixture, had a markedly acidic chemical reaction (pH: 0.76 / 25.3 ° C).

In order to neutralize the mixture, 21.84 kg of monoethanolamine were further added gradually, which contained min. 99.5% active ingredient (MEA). During the addition of ethanolamine, the initially light blue crystalline mixture first darkened significantly, gradually thinning out and became completely clear. Due to the release of heat of neutralization, the reaction mixture was significantly heated, while its temperature reached up to about 79 ° C. The hot reaction mixture had a practically neutral chemical reaction (pH: 7.55 / 57.9 ^e C).

In order to increase the nitrogen content and cool the reaction mixture, 21.62 kg of added urea was further added, as a result of which its temperature was reduced to about 35 ° C.

In this way, about 100 kg of liquid concentrate according to the solution was obtained, which contained more than 17 wt. % of amide nitrogen, its specific gravity at room temperature being d = 1354 kg / m 3. The prepared concentrate - a special foliar fertilizer contained in a liter 231.4 g of nitrogen, 18.3 g of manganese, 16.5 g of copper, 16.4 g of zinc and 14.35 g of iron, while these elements were bound in a complex chelate bond. The fertilizer had a solution character and was deep green-blue in color.

Example 3

In order to prepare 100 kg of liquid concentrate containing complex-chelate-bound zinc according to the solution, 21.27 kg of water were introduced into an enamel boiler equipped with an anchor stirrer, and 35.19 kg of technical powder diethylenetriaminepentaacetic acid containing at least 98% H5 was gradually added with stirring. -DTPA and then a further 16.37 kg of zinc sulphate monohydrate feed containing at least 35 wt. % zinc (as Zn). Thorough mixing of the mixture gave a white, crystalline suspension of a markedly acidic chemical reaction (pH: 0.49 / 26.7 ° C).

Next, 27.17 kg of technical grade monoethanolamine, which contained at least 99.5 wt.%, Were gradually added with constant stirring. % active substance (MEA). As a result of the neutralization, the temperature of the reaction mixture rose sharply (from the original room temperature to almost 70 ° C), while it first gradually liquefied and after dosing about 85% of the MEA charge and its clarification.

The liquid zinc concentrate prepared, according to the solution, was clear, light brown (honey) in color and relatively viscous. The undiluted concentrate showed only a weakly alkaline chemical reaction (pH: 8.27 / 34 ° C) and its specific gravity - density at room temperature was d = 1370 kg / m 3. It contained more than 5.7 wt. % zinc (as Zn) and almost 10 wt. % of total nitrogen (as N).

Zinc concentrate was used as a source of zinc in the foliar fertilization of corn and asparagus.

Example 4

Similarly to example no. 3, a liquid concentrate of complexed - chelated manganese was prepared, according to the solution.

In its preparation, 22.46 kg of water were introduced into a mixing device of a similar type as already mentioned, and the following was gradually added:

34.71 kg of technical grade diethylenetriaminepentaacetic acid powder, which contained at least 98% Hs-DTPA, 14.84 kg of powdered manganese sulfate monohydrate, which contained at least 32.5 wt. % manganese (as Mn), and 27.99 kg of technical monoethanolamine, which contained min. 99.5 wt. % active substance (MEA).

The liquid manganese concentrate prepared in this way was a relatively viscous, light brown, clear solution of a weakly alkaline chemical reaction, its specific gravity at room temperature being 1342 kg / m 3.

The concentrate contained more than 4.8 wt. % manganese (as Mn) and 10.1 wt. % of total nitrogen (as N).

Example 5

In order to prepare a liquid zinc concentrate based on a zinc chelate complex based on ethylenediaminetetraacetic acid (EDTA), the procedure was similar to Examples 3 and 4, but using the following raw materials:

17.41 kg of water,

27.59 kg of technical, powdered ethylenediaminetetraacetic acid - H <- EDTA, 17.24 kg of feed zinc sulphate monohydrate, which contained at least 35 wt. % of zinc (as Zn), and 37.76 kg of technical monoethanolamine, which contained min. 99.5 wt. % active substance (MEA).

Due to the neutralization of the initially markedly acidic mixture, which had the character of a white, crystalline suspension (pH: 0.77 / 23.2 ° C), the reaction mixture was heated to about 60 ° C, whereby it gradually clarified.

By reacting the above raw materials, 100 kg of complexed zinc liquid concentrate was prepared according to the solution. The concentrate was yellow-brown, honey-colored and contained more than 6.0 wt. % zinc, in predominantly complex - chelated form.

Examples 6 to 10

In the preparation of various one-component liquid concentrates of aminopolycarboxylate complexes - chelates according to the solution, the procedure was similar to that already mentioned in the above-mentioned examples, using the raw materials as shown in the following overview.

Example number: 6 7 8 9 10 Raw material component: hmôt. % Water 20.65 15.21 16.01 22.44 20.67 Technical, powdered ethylenediaminetetraacetic acid, H4-EDTA 24.39 24.10 - - 35.74 Technical powdered diethylenetriaminepentaacetic acid, min. 98% Hs-DTPA - - 26.38 30.75 - Zinc sulphate monohydrate, ZnSO ₄ .H ₂ O (min. 35% Zn) - 15.06 12.27 - - Ferrous sulphate heptahydrate, FeSO ₄ . 7 H ₂ O (18.5% Fe) - - 23.01 - Copper sulphate pentahydrate, CuSO ₄ . 5 H ₂ O (25% Cu) 20.14 - - - - Manganese sulfate monohydrate MnSO ₄ .H ₂ O (32% Mn) - - - 20.37 Technical ethanolamine (2-aminoethanol, colamine) NH2.CH2.CH2.OH - - - 23.80 - Technical triethanolamine, (HO.CH2.CH2) 3 N - 45.34 - - Methylamine, (aminomethane, methanamine) about 33% solution of CH3NH2 - 45.63 - - Diethanolamine, (2,2'-iminodiethanol, bis (2-hydroxyethyl) amine) HO. (CH ₂ ) ₂ . NH. (CH ₂ ) ₂ . OH 34.82 - - - - 1,2-ethanediamine (ethylenediamine) NH2.CH2.CH2.NH2 - - - - 23.22 Maximum achieved

reaction temperature, tmax (° C)

Total biogenic metal content (wt.%)

Total nitrogen content (wt.% N)

Chemical reaction of the concentrated product -pH / ° C

55 60 45 60 85 5.03 5.27 4.29 4.26 6.52 6.98 6.79 7.08 8.74 14.24 5.2 / 42 9.7 / 27 7.17 / 34 6.95 / 32 10.36 / 44

Note:

The product obtained by the reaction during Experiment 10 was not a true solution. It was clarified by the addition of water (37.2 wt.% Water in the product) to obtain a clear solution whose chemical reaction - pH was 9.23 / 26.3 ° C.

Example 11

In the preparation of the liquid calcium concentrate according to the solution, 37.78 kg of an approximately 50% aqueous solution of calcium nitrate, prepared by decomposition of calcium oxide with nitric acid, containing 12.21 wt.%, Were introduced into a stirred reactor. % calcium (as Ca) and 8.54 wt. % nitrogen (as N). Next, 34.02 kg of powdered ethylenediaminetetraacetic acid - H ₄ EDTA, technical grade, was gradually added with stirring. After thorough mixing, 28.2 kg of technical grade monoethanolamine (2-aminoethanol), which contained at least 99.5% of active ingredient, were gradually added to the crystalline suspension of creamy consistency. Due to the added hydroxyamine, the mixture gradually thinned and clarified, reaching a temperature of up to about 60 ° C. According to the above procedure, a liquid concentrate according to the solution was prepared, which had the character of a clear brown-yellow viscous solution of a weakly acidic chemical reaction (pH: 6.01 33 ° C). The product contained 4.61 wt. % calcium (as Ca) and 12.95 wt. % of total nitrogen (as N) and was miscible with water as well as most solution liquid fertilizers.

Example 12

In order to prepare the liquid magnesium concentrate according to the solution, 47.74 kg of an aqueous solution of magnesium nitrate, prepared by decomposition of technical magnesium oxide with nitric acid, containing at least 7.8 wt.%, Were introduced into a stirred reactor. % of magnesium (as MgO) and at least 9.5 wt. % of nitrate nitrogen (as N). With constant stirring, 28.23 kg of powdered ethylenediaminetetraacetic acid - H ₄ -EDTA, technical grade, were gradually added. Homogenization of the mixture gave a cream suspension to which 24.02 kg of technical grade monoethanolamine (2-aminoethanol), which contained at least 99.5% of active ingredient, was added gradually and with constant stirring.

During the neutralization, the reaction mixture gradually clarified and heated to a temperature of about 55 ° C. The reaction gave 100 kg of a clear liquid light yellow magnesium concentrate according to the solution. The product contained more than 3.7 wt. % magnesium (as MgO) and almost 12.8 wt. % of total nitrogen (as N). The freshly prepared, undiluted product had a practically neutral chemical reaction - pH: 7.56 / 47 ° C.

Example 13

In order to prepare a nutritional concentrate intended for the folium fertilization of cereals, 33.91 kg of a concentrated aqueous solution of ammonium citrate (NH ₄ ) ₂ S ₂ O ₃ containing 12 wt. Were introduced into a vessel equipped with a stirrer. % nitrogen (as N) and 26 wt. % of total sulfur (as S). 43.48 kg of added urea and 22.61 kg of an aqueous magnesium nitrate solution containing at least 7.8 wt.% Were added successively with stirring. % of magnesium (as MgO) and at least 9.5 wt. % of nitrate nitrogen (as N). After dissolving the urea, 100 kg of a nitrogen-containing solution containing magnesium containing 26.3 wt. % of total nitrogen (as N), 8.8 wt. % sulfur (as S) and 1.8 wt. % magnesium (as MgO). The mixed solution was clear, colorless and odorless and its chemical reaction - pH: 7.77 / 18.3 ° C.

The prepared basic mixed solution was enriched with complex bound trace plant nutrients - manganese, zinc, iron and copper according to the solution and also boron and molybdenum and at a dose of 2.5 liters per 400 liters and the hectare was sprayed, in the rooting stage, applied to the stand wheat.

Example 14

In the preparation of a universal liquid fertilizer intended primarily for off - root - foliar application, using intermediates according to the solution, the procedure was as follows.

A liquid concentrate of basic plant nutrients was prepared first. Its preparation was carried out by introducing 42.86 kg of the extract obtained by maceration of the vermicompost with a dilute aqueous solution of potassium alkali. Then, while stirring, the following was gradually added:

19.5 kg of a concentrated aqueous solution of hydrogen and potassium phosphate dihydrogen (KH2PO4 and K2HPO4), which contained 18 wt. % P2O5 and 21 wt. % K2O and 17.5 kg of added urea, containing at least 46.2% by weight of nitrogen (as N). After dissolving the urea, the following was added with stirring:

g of crystalline ammonium molybdate, (ΝΗ4) βΜθτΟ ₂ 4.4 H ₂ O, 2.75 kg of liquid boron concentrate based on boroethanolamine (150 g B per liter), 7.05 kg of liquid iron concentrate based on Fe-DTPA, prepared according to the solution for diethylenetriaminepentaacetic acid base - DTPA and ethanolamine (MEA),

3.5 kg of liquid zinc concentrate based on Zn-EDTA, prepared according to the solution based on ethylenediaminetetraacetic acid - EDTA and ethanolamine, 3.7 kg of liquid manganese concentrate based on Mn-EDTA, prepared according to the solution based on ethylenediaminotetraacetic acid - EDTA and ethanolamine, and 2.1 kg of a liquid copper concentrate based on Cu-EDTA, prepared according to the solution based on ethylenediaminetetraacetic acid - EDTA and ethanolamine. After thorough stirring, 1.03 kg of an aqueous solution of 3-indolylacetic acid (IAA) potassium salt containing 1.4 g of IAA per liter was added with continued stirring.

Finally, the prepared complex universal fertilizer was colored by the addition of a water-soluble green food color.

The prepared concentrate, according to the solution, contained more than 15.5 wt. % of total nitrogen, at least 3.5 wt. % of total phosphorus (as P ₂ Os) and at least 4.1 wt. % of potassium (as K2O) in chloride-free form. The liquid concentrate further prepared contained 0.3 wt. % boron (as B), 0.3 wt. % of complex bound iron (as Fe), 0.2 wt. % of complex bound zinc (as Zn), 0.2 wt. % of complexed manganese (as Mn), 0.1 wt. % of complex bound copper (as Cu) and 0.005 wt. % of plants well acceptable molybdenum (as Mo). In addition, the prepared universal fertilizer concentrate was the source of a number of biologically active substances and also contained a growth stimulator (IAA).

Approximately 100 kg of universal foliar fertilizer concentrate was prepared in this way, which was diluted with water in a volume ratio of 1: 200 to 500 before spraying on the above-ground part of the plants, depending on the type and condition of the stand and also according to climatic conditions.

Claims (6)

CLAIMS FOR PROTECTION Liquid concentrates of secondary and / or trace plant nutrients containing biogenic elements bound in the form of aminopolycarboxylic acid complexes, characterized in that they contain reaction products of aminopolycarboxylic acid complexes with at least one amine or hydroxypamine. Liquid concentrates of secondary and / or trace plant nutrients according to Claim 1, characterized in that the aminopolycarboxylic acid is ethylenediaminetetraacetic acid or diethylenetriaminopentaacetic acid. Liquid concentrates of secondary and / or trace plant nutrients according to Claim 1, characterized in that the amine is ethanolamine. Liquid concentrates of secondary and / or trace plant nutrients according to claim 1, characterized in that they further comprise iron and / or manganese and / or zinc and / or copper and / or magnesium and / or calcium. The use of liquid concentrates of secondary and / or trace plant nutrients according to claim 1 for foliar plant nutrition. Use of liquid concentrates of secondary and / or trace plant nutrients according to claim 1 as a source of biogenic elements in the preparation of compound fertilizers.