RU2728697C1 - Sorption-stimulating preparation for presowing treatment of spring wheat seeds based on polyethylene glycol - Google Patents

Abstract

FIELD: agriculture.SUBSTANCE: invention relates to the agriculture. Sorption-stimulating preparation for pre-sowing treatment of spring wheat seeds by semi-dry method includes potassium or sodium humate and beer yeast autolysate, wherein it further contains calcium bentonite and polyethylene glycol and is a clay-humus complex in form of an aqueous suspension comprising components in the following concentration: polyethylene glycol 250–350 mg/l, humate 8–12 g/l, calcium bentonite 35–45 g/l, beer yeast autolysate 10–14 g/l.EFFECT: invention increases stimulating capacity of preparations for presowing treatment of seeds with a semi-dry method, accelerates germination of seeds of spring wheat and development of their seedlings.1 cl, 1 tbl

Description

Technology area

The invention relates to agriculture, namely to the development of preparations-stimulants of plant growth for pre-sowing treatment of seeds of spring wheat. Presowing seed treatment is one of the most important elements of the technology for growing agricultural crops, which makes it possible to increase their germination and protect them from pests. In addition, it prevents the emergence and spread of a number of diseases during the growth and development of plants.

State of the art

It is known that seed treatment with polyethylene glycol (PEG) with a molecular weight of 6000 (PEG 6000) gives good results to increase the germination energy. (3.V. Redkina and others). As a rule, the following treatment method is recommended: the seeds are washed with a weak KMnO4 solution and soaked in a PEG 6000 solution for several days.

Known complex preparations based on PEG for pre-sowing treatment of seeds and planting material, containing, for example, components in the following ratios, wt. %: furacilin - 0.45-0.9, catapol - 0.45-0.9, polyethylene glycol-400 (PEG-400) - 89.0, dimethyl sulfoxide (DMSO) - 0.9, water - the rest (RF patent No. 2565291). Such a composition provides stability during long-term storage, an increase in bactericidal and fungicidal activity, but is not applicable on an industrial scale.

Also known is the MUVER® PLANT GROWTH STIMULATOR (https://dolina.ua/ru/catalogue-exclusivnie-produkti/-76.html), also made on the basis of PEG and representing a complex natural-synthetic preparation of contact-systemic action for seed treatment and vegetative plants. PEG easily penetrates into tissues, acting as a transport agent for all drugs used in conjunction with the growth promoter MUVER®. PEG also structures free intracellular water, increasing its biological activity, accelerating the processes of growth and photosynthesis. MUVER® regulates transpiration and intensity of mineral nutrition. PEG degradation products - ethanolamines - are nutrients for plant cells. Washed salts of humic acids enhance root formation and improve nutrition, which contributes to the activation of the growth of the aerial part of plants.

The main disadvantage of these drugs - growth stimulants - is the low efficiency of stimulation, as well as the irreproducibility of the obtained positive results on an industrial scale.

Known complex preparation, disclosed in the patent of the Russian Federation No. 2625957 and includes in its composition salts of gibberellic acids (gibberellins), potassium humate (sodium) and crude autolysate of brewer's yeast (APD) containing live yeast cells, at a dose of autolysate brewer's yeast 1.5- 3 kg per ton of seeds, a dose of gibberellins 6.4-9.6 g per ton of seeds and a dose of potassium (sodium) humate 50-200 g per ton of seeds.

The main disadvantage of the drug described above is also the low efficiency of the stimulant and the irreproducibility of the obtained positive results when used on real soils on an industrial scale. This is due to the fact that when creating a complex drug, it is necessary not only to take into account the total effect of each of the stimulating components, but to ensure the presence of components in the drug in certain concentrations that provide a certain component balance, which contributes to a multiple increase in the stimulating ability in real soils.

Disclosure of the essence of the invention

The technical problem solved by the claimed invention is to overcome the disadvantages inherent in analogs and the prototype, by creating a sorption-stimulating drug that provides an increase in the stimulating effect of PEG during pre-sowing treatment of spring wheat seeds by reducing the supply of allelotoxins from soils to seeds, reducing inhibition soil allelotoxins of seed germination and PEG activation.

Thus, on the one hand, the effect of PEG on seed growth is known; on the other hand, its use as a growth stimulant when treating seeds on an industrial scale (semi-dry method) is not practiced. Thus, for industrial use in a semi-dry way, the known PEG-based preparations are not applicable, which is the problem solved by the claimed invention.

The technical result achieved when using the claimed invention is to increase the stimulating ability of preparations for pre-sowing seed treatment in a semi-dry way, which is reflected in accelerating the germination of spring wheat seeds and the development of their seedlings.

The technical result is achieved by the fact that the sorption-stimulating preparation for pre-sowing treatment of spring wheat seeds by a semi-dry method, including potassium or sodium humate and autolysate of brewer's yeast, according to the technical solution, additionally contains calcium bentonite and polyethylene glycol, and is a bentonite-humate complex in the form of an aqueous a suspension containing the indicated components in the following concentration:

polyethylene glycol 250-350 mg / l,

humate 8-12 g / l,

calcium bentonite 35-45 g / l,

autolysate of brewer's yeast 10-14 g / l.

The technical essence of the invention lies in the fact that the preparation, characterized by the claimed ranges of concentrations of the components, provides PEG activation while reducing the supply of allelotoxins from soils to seeds due to the formation of a bentonite-humate complex. This leads to a decrease in the inhibition of seed germination by soil allelotoxins. To do this, when creating a preparation, calcium bentonite with humate is added to PEG, and APD is additionally introduced in the stated concentrations. When humic substances (humates) interact with bentonite, bentonite-humate complexes are formed, which have a much higher sorption capacity in relation to organic substances (for example, pesticides), which fix allelotoxins from soils, preventing them from entering the seeds and inhibiting their development. That is, the introduction of calcium bentonite into the composition of the preparation significantly enhances the absorption of allelotoxins from the soil by the preparation, reducing their amount entering the seeds. This reduces the inhibitory effect of allelotoxins on seeds and allows better expression of the stimulating ability of PEG. By introducing APD into the preparation, they block the active centers of the humus-bentonite (bentonite-humate) complex capable of absorbing biologically active substances from the soil that have a positive effect on seed development. This makes it possible to obtain a high efficiency of stimulation of the development of spring wheat seeds when they are treated with a semi-dry method, which is unattainable with the known applications of PEG. In real production conditions, the use of stimulants for the development of seeds of grain crops, there is no alternative to semi-dry seed treatment due to the high productivity of this method, which allows for a short sowing period to process seeds for sowing on large areas of real farms.

The concentration ranges were selected, in which the drug acts most effectively. It was revealed that at certain ratios "calcium bentonite - humate", a bentonite-humate complex appears, which has the maximum sorption capacity in relation to organic substances (allelotoxins).

To ensure a balanced amount of the bentonite-humate complex in the preparation, the boundaries of the range of its concentration have been empirically determined and checked. The value of the lower boundaries of the intervals of calcium bentonite and humate is due to the ability of the bentonite-humate complex to efficiently absorb and fix allelotoxins entering the seeds from the soil, and the upper limit is due to the fact that the amount of biologically active substances from soils that can stimulate the development of seeds is fixed on the sorbent in the minimum degree.

For APD, the selected lower limit of the concentration interval is associated with the need for additional blocking of the active centers of the sorbent capable of fixing stimulating biologically active substances from soils, and the upper limit is due to the displacement of allelotoxins from soils by stimulating biologically active substances and an increase in their amount entering the seeds, which leads to an increase in inhibiting seed development. At the same time, it should be borne in mind that this process is superimposed on the intake of substances from the APD into the seeds that stimulate the development of seeds (for example, vitamins).

For PEG, which is a surfactant, the selected range of values is due to the presence of optimal concentrations in seeds (plants), at which biochemical reactions take place at maximum speed, taking into account the fact that part of the PEG is fixed on the bentonite-humate complex during the preparation of the claimed preparation.

Implementation of the invention

The further description of the essence of the invention is made using examples of specific implementation.

The experiments were carried out on the seeds of spring wheat variety "Lyubava" on sod-podzolic soil from the vicinity of the Yakhroma river floodplain with a moisture content of 18.1%.

To assess the effectiveness of this or that drug, a technique was used based on the existence of a linear relationship between the length of seedlings of large seed arrays and their bulk volume in water, disclosed, for example, in RF patent No. 2683504. The known method for evaluating the stimulatory activity of drugs-stimulants allows you to process large batches of seeds in a short time, which makes it applicable on an industrial scale. The total length of seedlings determines their bulk volume. The longer the seedlings are, the greater the bulk of the germinated seeds. Thus, the change in the bulk volume of germinated seeds characterizes the total length of their seedlings and makes it possible to compare the germinated seeds treated with a stimulant with control untreated samples.

To estimate the length of seedlings for each experimental batch of seeds, the following steps were performed. 30 g of soil was placed on the bottom of a dish with a diameter of 95 mm, then 7.5 g of seeds (untreated, control, or treated with a modified preparation) were placed in an even layer, and 30 g of soil was placed on top. After that, water was evenly added to the dish from a measuring pipette. A sixfold replication was used with subsequent statistical processing of the results.

The seeds germinated in the soil were washed from the substrate and placed in portions into a 100 ml measuring cylinder with water, placed on a vibrating table vibrating at a frequency of 50 Hz. After placing each portion of germinated seeds in a cylinder, which created an openwork porous structure, a small weight of 8 g in the form of a rubber stopper was placed on them for 15-20 seconds, which led to the compaction of the structure. After placing all the germinated seeds in the cylinder, a weight was placed on them and additional compaction of the structure was performed by lightly tapping (30-40) the cylinder with seeds on the table. These operations made it possible to create a fairly homogeneous structure, and the lower boundary of the load made it possible to determine the bulk volume with an accuracy of 0.5 ml.

Before carrying out experiments to determine the stimulation of seed development by the preparations, the optimal initial soil moisture was determined, at which the tests were carried out. For this, according to the method described above, the amount of water added to the soil was determined, which would provide the maximum total length of seedlings of untreated seeds for 2 days. The optimum amount of water added to the soil was 9 g.

To confirm the effectiveness of the claimed drug, several groups of control and test samples of drugs were prepared, which were used to treat the corresponding weighed portions of seeds and in each case, the length of seedlings was determined by the above method. Germination of seeds in all cases was carried out for 2 days under identical conditions.

Group 1 - seeds without treatment (for two days, the total length of seedlings was 5300 mm).

Group 2 - seeds treated with an aqueous solution of PEG-1000. The concentration of the solution was 75 mg / l. Seeds were treated with a solution of the drug in a semi-dry way with a solution flow rate of 40 liters per ton of seeds. The effect of stimulation along the total length of seedlings of 7.5 g of seeds growing in sod-podzolic soil did not exceed 9% in relation to the length of seedlings without treatment (group 1).

Group 3 - seeds treated with a complex preparation made in accordance with patent No. 2625957 (prototype). The concentration of the solution was: autolysate of brewer's yeast - 100 g / l; humate - 10 g / l; gibberellins - 320 mg / l. The solution consumption was 20 liters per ton of seeds. The effect of stimulation on the total length of seedlings of 7.5 g of seeds growing in sod-podzolic soil did not exceed 7% in relation to the length of seedlings without treatment (group 1).

Group 4 - seeds treated with drugs of the claimed composition.

To obtain the claimed composition used:

potassium (sodium) humate, produced by OOO NVC "Agrotechnology" from brown coal; calcium bentonite according to OST 18-49-71;

autolysate of brewer's yeast (APD), produced by the industry for use as an additive to livestock feed, produced by Biotech plus LLC (Russia);

polyethylene glycol with a molecular weight of 400; 1000; 4000; 20,000 (PEG-400; PEG-1000; PEG-4000; PEG-20,000).

Aqueous suspensions of the required concentrations were prepared from these components by adding water and polyethylene glycol solutions of different molecular weights with a concentration of 2 g / L to the necessary weighed portions of dry preparations and performing simple stirring. Then, wheat seeds were treated with the prepared solutions (suspensions) in a semi-dry way with a consumption of the drug solution of 40 liters per ton of seeds.

The magnitude of stimulation during seed treatment with drugs was also determined by the length of seedlings grown in 2 days in comparison with untreated seeds, expressing an increase in seedling length in percent, as well as by seeds of groups 2 and 3.

The results of measurements and estimates of the length of seedlings of the described groups are summarized in Table 1.

From the data obtained, it can be seen that the optimal processing parameters are: suspension with humate concentrations of 8-12 g / l, bentonite 35-45 g / l, autolysate of brewer's yeast 10-14 g / l, polyethylene glycol 250-350 mg / l. At the same time, the molecular weight of PEG has no significant effect on stimulation.

It follows from the table that the composition with the given concentrations of the constituent components (taking into account their variability within the stated concentrations) provides a multiple increase in the length of seedlings in relation to untreated seeds of group 1, which indicates the effectiveness of stimulation in accordance with the selected assessment method. Going beyond the declared concentration ranges of the suspension components leads to a decrease in the effectiveness of the use of drugs.

Thus, the proposed invention can significantly increase the efficiency of stimulating treatment of spring wheat seeds with polyethylene glycol up to 36%.

Claims (2)

Sorption-stimulating preparation for pre-sowing treatment of spring wheat seeds in a semi-dry way, including potassium or sodium humate and autolysate of brewer's yeast, characterized in that it additionally contains calcium bentonite and polyethylene glycol and is a clay-humus complex in the form of an aqueous suspension, including components in the following concentration: polyethylene glycol 250-350 mg / l humate 8-12 g / l calcium bentonite 35-45 g / l autolysate of brewer's yeast 10-14 g / l