SK7512Y1 - 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

The invention relates to liquid concentrates of secondary and / or trace elements based on aminopolycarboxylic acid complexes. The concentrates are characterized by containing products of reactions of aminopolycarboxylic acid complexes with at least one of amines or hydroxylamines. The concentrates are advantageously useful for off-leaf nutrition of plants and also as a source of appropriate nutrients in the preparation of multi-component fertilizers.

BACKGROUND OF THE INVENTION

Plants consist of the same elements as inanimate nature, while the formation of plant matter is the result of complex transformations of substances from the environment surrounding plants and energy. The chemical analysis currently used 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 are most often divided into basic, sometimes also referred to as macroelements, secondary elements, trace elements. microelements, ultra-microelements and useful elements. The secondary elements usually include calcium (Ca), magnesium (Mg) and sometimes also sulfur (S), which is now usually included among the basic, so-called. building macroelements. Although a number of microelements are not closed, the critical trace elements include: iron (Fe), boron (boron), manganese (Mn), zinc (Zn), copper (Cu), molybdenum (Mo) and cobalt (Co).

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

Each biogenic element must be present in the culture medium of the plant at a certain minimum dose, none of which is substitutable by another biogenic element. It may happen that the intake of a certain plant nutrient from the soil is so severely hampered due to the antagonism of the elements that the plant suffers from its deficiency. Nutrient uptake from soil is also strongly influenced by soil chemical reaction (pH).

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

In order to increase the availability of some plant elements, it is preferred that they are bound in a complex form. A special type of complexes are the so-called. chelates formed by complexing reactions. In these reactions, so-called. the central atom, the electron shell of which is capable of receiving electrons, merges with particles, the so-called. ligands having at least one free electron pair. Ligands therefore provide a central atom, respectively. ion electrons, resulting in a dative bond. The central ions are most often cations, the ligands being anions or neutral molecules of a dipolar nature.

Examples of complexing reactions include, but are not limited to:

central ion (atom) ligand complex Fe 2+ + 6 CN- ^ / Fe (CN) 6/4 Co 2+ + 6NH ₃ - / CoINTV 2+ H + + h ₂ o / h ₃ o / + Ni + 4 CO Ni (CO) ₄

The above reaction schemes represent the simplest complexing reactions. Some ligands, especially complex organic molecules, are capable of occupying multiple central atom coordination sites as they have several groups with free electron pairs. Such substances are commonly referred to as polydonor ligands. The reactions of polydonor ligands with one central particle (metal ion) give rise to cyclic complexes, referred to as chelates.

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

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

Chelates are used in building chemistry, in the production of detergents for industry and households, in the food industry, as additives in the production of feed, in the purification of natural gas, in leather processing processes, in the electrical industry, in metal separation, in petrochemistry, in photographic Pro2

SK 7512 Υ1 Czech, in the manufacture of printing inks and inks, in the manufacture of pulp and in the textile industry and also in relation to plant nutrition - in agriculture.

In order to ensure the highest possible efficiency of mainly trace nutrients - microelements, the use of a wide range of complex compounds has been extended in agriculture. In addition to a number of 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 APC. These form stable complexes with metal ions, the resulting complexes - chelates, are characterized by good stability over a wide temperature and pH range and are also inert in most chemical environments.

Of a variety of chelating agents may be aminopolykarboxylátového type include: nitrilotriacetic acid (H ₃ -NTA), ethylene diamine tetraacetic acid (H ₄ EDTA), diethylenetriaminepentaacetic acid (H ₅ -DTPA) acid, 1,3-propyléndiamínotetraoctovú ₍₄ -PDTA H). hydroxyethylenediaminotriacetic acid (H ₃ -HEDTA) and others.

In relation to plant nutrition, the aminopolycarboxylate complexes - chelates based on EDTA (I) and DTPA (II) are most often used.

HO-C - CH.

II

HO — C — CH, II O

N — CH3— CH—

Λ. i-CH-C-OH

CH — C — OH ^! II

MO-C-CH,

HO — C — CH, N — CH, —CH 3 —N — CH, —CH, —N ^

II

CHFC-OH

II li.

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

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

As a rule, one of the basic reacting sources of alkali metal (usually sodium) or ammonia or ammonium hydroxide is used for neutralization. The consequence of this is that the chelated complexes offered are always the source of the corresponding alkali metal or ammonium. By way of example, the following formulas are given by their manufacturers: /EDTA.Ca/Na ₂ , /EDTA.Cu/(NH ₄ ) ₂ , /EDTA.Zn/Na ₂ , /EDTA.Mn/.K ₂ , /DTPA.Fe / Na ₂ , /EDTA.Fe/Na ₃ H ₂ O and others.

A significant drawback of the final complexes - chelates - mentioned in their manufacturers' offers is the relatively high sodium cation content in most products of this type. Sodium is a ballast - an undesirable element for most agricultural crops, which causes the salinisation of soil and growing substrates, and is often the cause of increased necrotic action when applied outside the root3.

Forged preparations. The presence of currently used neutralizing agents negatively affects the concentration of the complex bound biogenic element, and very often also negatively affects the water solubility of the complex. Many of the final type chelates are offered in solid form - as powders or microgranules. Their solid state insulation from the originally liquid form is usually very energy and technologically demanding, which of course has to be reflected in their price. This is all the more contradictory if we realize that in the preparation of the application mixtures, chelates in solid form must be re-converted into liquid form - aqueous solution.

The essence of the technical solution

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

The products of the solution are characterized by containing products of reactions of aminopolycarboxylic acids with one of the amines or hydroxylamines. 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 hydroxylamines is used to neutralize the hydrogen cations released in the complexing reactions instead of the basic substances which are then the source of the alkali metal or ammonia.

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

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

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

From the point of view of practical use of liquid concentrates in the sense of the solution, it has proven 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 manufacturing and economic point of view, it is advantageous if the liquid concentrates according to the solution contain the reaction products of ethylenediaminotetraacetic acid - EDTA (CAS No .: 60-00-4) or diethylenetriaminopentaacetic acid - DTPA (CAS No .: 67-43-6).

Similarly, ethanolamine (2-aminoethanol, monoethanolamine, colamine) NH 2 CH 2 CH 2 OH, C 2 H 7 NO, ethylenediamine (1,2-ethanediamine) NH 2 CH 2 has been shown to be advantageous to neutralize the acid-reactive mixture of aminopolycarboxylic acid complexes. .CH2.NH2, C 2 H ₈ N _2, triethanolamine (HO.CH2.CH _{2) 3} N, COH or NO? triethylamine (C 2 H _{5) 3} N, Ο, Ηι, Χ, diethanolamine HN (CH 2 CH ₂ OH) 2, methylamine (aminomethane) CH ₃ NH ₂ . Experimentally it has been shown that it is particularly advantageous to neutralize the reaction mixture used ethanolamine (2-aminoethanol, 2-amino-ethyl alcohol, monoethanolamine, colamine) NH ₂ .CH ₂ .CH ₂ .OH (CAS No .: 141-43- 5).

The use of said strongly basic reacting compounds has a synergistic effect on the stability of the resulting complex biogenic element compounds and the properties of the liquid concentrates of the invention.

Liquid concentrates according to the invention can have a practically neutral chemical reaction and are freely miscible not only with water but also with virtually all liquid fertilizers and in the form of application solutions also with almost all plant protection products. It has also been shown that liquid concentrates of this type are suitable, after appropriate dilution, for extracorporeal - foliar - 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 multicomponent fertilizers, while allowing the preparation of liquid fertilizers of different composition and destination.

EXAMPLES

The following examples are intended to clarify the substance of the solution and to document the wide possibilities of its practical use. However, they cannot in any way restrict the protection of the person.

Example 1

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

SK 7512 Υ1

22.5 kg of crystalline ethylenediaminotetraacetic acid (H ₄ -EDTA),

3,8 kg of manganese sulphate monohydrate (Μη8Ο ₄ .Η ₂ Ο),

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 (FeSO ₄ .7 H ₂ O).

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

In order to neutralize the mixture, 10.15 kg of monoethanolamine, which contained min.

99.5% active ingredient (MEA). During the addition of the ethanolamine, the initially light blue crystalline mixture initially became very dark, gradually diluted and became completely clear. Due to the release of the neutralizing heat, the reaction mixture was heated considerably, reaching a temperature of about 55 ° C.

A liquid concentrate containing complex bound iron, manganese, zinc and copper was prepared by the above process, which additionally contained amide nitrogen and plant-accessible sulfur. The concentrate was a dark green-blue, clear and relatively viscous solution, which could be stored 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 complex bound microelements as in Example 1, which was intended to prevent fertilization of cereals by foliar application at a dose of 3 liters of concentrate in 400 liters of water per hectare, the following procedure was followed.

To a stainless steel reactor equipped with a stirrer was added 14.0 kg of water and, with stirring, gradually added:

24.38 kg of crystalline ethylenediaminotetraacetic acid (H ₄ -EDTA),

4.16 kg of manganese sulphate monohydrate (MnSO ₄ .H ₂ O),

4,81 kg of copper sulphate pentahydrate (CuSO ₄ .5 H ₂ O),

3,46 kg of zinc sulphate monohydrate (ZnSO ₄ .H ₂ O) a

5.73 kg of ferrous sulfate heptahydrate (FeSO ₄ .7 H ₂ O).

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

In order to neutralize the mixture, 21.84 kg of monoethanolamine containing min.

99.5% active ingredient (MEA). During the addition of the ethanolamine, the initially light blue crystalline mixture initially became significantly darker and gradually became completely clear. Due to the release of neutralizing heat, the reaction mixture was heated considerably, reaching a temperature of up to about 79 ° C. The hot reaction mixture had a virtually neutral chemical reaction (pH: 7.55 / 57.9 ° C).

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

In this way, approximately 100 kg of liquid concentrate in the sense of a solution containing more than 17 wt. % amidic nitrogen, its density at room temperature being d = 1354 kg / m ³ . The prepared concentrate - a special foliar fertilizer - contained 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. . The fertilizer had a solution character and was of a tan-blue color.

Example 3

In order to prepare 100 kg of liquid concentrate containing complex-chelate-bound zinc in accordance with the invention, 21.27 kg of water was added to an enamel boiler equipped with an anchor stirrer and 35.19 kg of technical powdered diethylenetriaminopentaacetic acid containing at least 98% Hs-DTPA, and then 16.37 kg of feed zinc sulfate monohydrate containing at least 35 wt. % zinc (as Zn). Thorough mixing of the mixture gave a white, crystalline suspension of a strongly acidic chemical reaction (pH: 0.49 / 26.7 ° C).

Further, 27.17 kg of technical monoethanolamine, which contained at least 99.5 wt. % of active substance (MEA). As a result of the neutralization, the temperature of the reacting mixture rose sharply (from the original room temperature to almost 70 ° C), initially causing it to gradually flow off and, after feeding about 85% of the MEA baffle, to clarify.

The prepared liquid zinc concentrate according to the solution was clear light brown (honey) color and was relatively viscous. The undiluted concentrate showed only a weakly alkaline chemical reaction (pH: 8.27 / 34 ° C) and its density - 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 for foliar fertilization of corn and asparagus.

SK 7512 Υ1

Example 4

As in Example no. 3, a liquid concentrate of complex - chelate - bound manganese was prepared in the sense of the solution.

To prepare it, 22.46 kg of water was introduced into a mixer of the same type as described above, followed by the following:

34,71 kg of technical powdered diethylenetriaminopentaacetic acid containing not less than 98% Hs-DTPA,

14.84 kg of manganese sulfate monohydrate powder containing at least 32.5 wt. % manganese (as Mn), and

27.99 kg of technical monoethanolamine containing min. 99.5 wt. % of active substance (MEA).

The liquid manganese concentrate thus prepared 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 the complex-chelate-zinc based on ethylenediaminotetra acetic acid (EDTA), the solution was similar to that of Examples 3 and 4, but using the following raw materials:

17.41 kg of water,

27.59 kg of technical, powdered ethylenediaminotetraacetic acid -H ₄ -EDTA,

17.24 kg of feed zinc sulfate monohydrate containing at least 35 wt. % zinc (as Zn), and

37.76 kg technical monoethanolamine containing min. 99.5 wt. % of active substance (MEA).

Due to the neutralization of the initially strongly 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 and gradually clarified.

By reaction of the above raw materials, 100 kg of a complex bound zinc liquid concentrate was prepared according to the invention. The concentrate was yellow-brown, honey-colored and contained more than 6.0 wt. % zinc, in a predominantly complex - chelate - form.

Examples 6 to 10

The preparation of the various mono-component liquid concentrates of the aminopolycarboxylate complexes - chelates - was carried out in a similar manner to the above examples, using the raw materials as shown in the following overview.

Example number: 6 7 8 9 10 Raw material component weight. % Water 20.65 15.21 16.01 22.44 20.67 Technical, powdered ethylenediaminotetraacetic acid, H ₄ -EDTA 24.39 24,10 - - 35.74 Technical powdered diethylenetriaminopentaacetic 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) NH ₂ .CH ₂ .CH ₂ .OH - - - 23.80 - Technical triethanolamine, (HO.CH ₂ .CH ₂ ) ₃ N - - 45,34 - - Methylamine, (aminomethane, methanamine) approx. 33% CH ₃ NH ₂ solution - 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) NH ₂ .CH ₂ .CH ₂ .NH ₂ Maximum reached - - - - 23.22 reaction temperature, t _max (° C) 55 60 45 60 85 Total biogenic metal content (wt%) 5.03 5.27 4.29 4.26 6.52 Total nitrogen content (% N) 6.98 6.79 7.08 8.74 14.24 Chemical reaction of concentrated product - pH / ° C 5.2 / 42 9.7 / 27 7.17 / 34 6.95 / 32 10.36 / 44

note:

The product obtained during the reaction of Experiment 10 was not a true solution. It was clarified on 6

SK 7512 Υ1 with water (37.2 wt.% Water in the product) to give a clear solution whose chemical reaction - pH was 9.23 / 26.3 ° C.

Example 11

To prepare the liquid calcium concentrate of the present invention, 37.78 kg of an approximately 50% aqueous calcium nitrate solution prepared by decomposing calcium oxide containing 12.21 wt. % calcium (as Ca) and 8.54 wt. % nitrogen (as N). Next, 34.02 kg of technical grade ethylenediaminotetraacetic acid -H ₄ -EDTA powder was added gradually with stirring. After thorough mixing, 28.2 kg of technical monoethanolamine (2-aminoethanol), which contained at least

99.5% active ingredient. Due to the added hydroxyamine, the mixture gradually reduced and clarified, reaching a temperature of up to about 60 ° C. A liquid concentrate according to the present invention was prepared as a clear brownish viscous solution of a weakly acidic chemical reaction (pH: 6.0 / 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 and also most liquid liquid fertilizers.

Example 12

In order to prepare the liquid magnesium concentrate of 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. % magnesium (as MgO) and at least 9.5 wt. % nitrate nitrogen (as N).

While stirring, 28.23 kg of technical grade ethylenediaminotetraacetic acid -H ₄ -EDTA powder was gradually added. Homogenization of the mixture gave a creamy suspension to which 24.02 kg of technical monoethanolamine (2-aminoethanol) containing at least 99.5% active ingredient was added gradually and with stirring.

During the neutralization, the reaction mixture gradually cleared and heated to about 55 ° C. The reaction yielded 100 kg of a clear liquid concentrate of light yellow color according to the invention. 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 virtually neutral chemical reaction - pH: 7.56 / 47 ° C.

Example 13

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

The prepared basic mixed solution was enriched with complexly bound trace nutrients manganese, zinc, iron and copper in terms of solution and further boron and molybdenum and in a dose of 2.5 liters to 400 liters and the hectare was sprayed, at the stage of propagation, applied to the stand wheat.

Example 14

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

Liquid concentrate of basic plant nutrients was prepared first. To prepare it, 42.86 kg of liquor obtained by maceration of vermicompost with a dilute aqueous potassium alkali solution was introduced into the tank. Then, with stirring, gradually added:

19.5 kg of a concentrated aqueous solution of hydrogen and potassium phosphate dihydrogen (KH ₂ PO ₄ and K ₂ HPO ₄ ) containing 18 wt. % P ₂ O ₅ and 21 wt. % K ₂ O, a

17.5 kg of urea fed, containing at least 46.2 wt. % nitrogen (as N).

After the urea had dissolved, the following was added with stirring:

g crystalline ammonium molybdate, (ΝΗ ^ ΜογΟ ^ Α H ₂ O,

2,75 kg of boronethanolamine-based liquid boron concentrate (150 g B per liter),

7.05 kg of Fe-DTPA-based liquid iron concentrate prepared according to a solution based on diethylenetriaminopentaacetic acid - DTPA - and ethanolamine (MEA),

3.5 kg of Zn-EDTA-based liquid zinc concentrate prepared according to the solution based on ethylenediaminotetraacetic acid - EDTA - and ethanolamine,

3.7 kg of Mn-EDTA-based manganese liquid concentrate prepared according to an ethylene-based solution 7

751 minotetraacetic acid - EDTA - and ethanolamine a

2.1 kg of Cu-EDTA-based liquid copper concentrate prepared according to the solution based on ethylenediaminotetraacetic acid - EDTA - and ethanolamine. After thorough mixing, 1.03 kg of an aqueous solution of 3-indolylacetic acid potassium salt (IAA) containing 1.4 g 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 invention contained more than 15.5 wt. % of total nitrogen, at least

3.5 wt. % of total phosphorus (such as P2O5) and at least 4.1 wt. % potassium (as K ₂ O) in chloride-free form. Further, the liquid concentrate prepared contained 0.3 wt. % boron (as B), 0.3 wt. % complexed iron (such as Fe), 0.2 wt. % complexed zinc (as Zn), 0.2 wt. % of complex bound manganese (as Mn), 0.1 wt. % complexed copper (as Cu) and 0.005 wt. % of well acceptable molybdenum plants (such as Mo). The prepared universal fertilizer concentrate was also a source of a number of biologically active substances and also contained a growth stimulator (IAA).

Approximately 100 kg of universal leaf fertilizer - concentrate was prepared by the above mentioned method, which was diluted with water in the volume ratio 1: 200 to 500, depending on the type and condition of the stand and also according to climatic conditions.

PROTECTION REQUIREMENTS

Claims (6)

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 products of reactions of aminopolycarboxylic acid complexes with at least one amine or hydroxylamine. Liquid concentrates of secondary and / or trace plant nutrients according to claim 1, characterized in that the aminopolycarboxylic acid is ethylenediaminotetraacetic 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. Use of the liquid concentrates of secondary and / or trace plant nutrients according to claim 1 for foliar plant nutrition. Use of the 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. End of document