EP4041699A1 - Utilisation d'un verre d'aluminosilicate pour apporter à une plante du silicium sous forme assimilable, procédé de traitement d'une plante utilisant ce verre et nouvelle poudre dudit verre - Google Patents

Utilisation d'un verre d'aluminosilicate pour apporter à une plante du silicium sous forme assimilable, procédé de traitement d'une plante utilisant ce verre et nouvelle poudre dudit verre

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Publication number
EP4041699A1
EP4041699A1 EP20796635.9A EP20796635A EP4041699A1 EP 4041699 A1 EP4041699 A1 EP 4041699A1 EP 20796635 A EP20796635 A EP 20796635A EP 4041699 A1 EP4041699 A1 EP 4041699A1
Authority
EP
European Patent Office
Prior art keywords
aluminosilicate glass
plant
glass
nitrogen
use according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20796635.9A
Other languages
German (de)
English (en)
French (fr)
Inventor
Mustapha ARKOUN
Frank Jamois
Jean-Claude Yvin
Kamila ROLLI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Isover SA France
Agro Innovation International SAS
Original Assignee
Saint Gobain Isover SA France
Agro Innovation International SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Isover SA France, Agro Innovation International SAS filed Critical Saint Gobain Isover SA France
Publication of EP4041699A1 publication Critical patent/EP4041699A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/0007—Compositions for glass with special properties for biologically-compatible glass
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C05D9/02—Other inorganic fertilisers containing trace elements
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C21/00—Methods of fertilising, sowing or planting
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2204/00—Glasses, glazes or enamels with special properties

Definitions

  • the present invention generally relates to the use of a specific aluminosilicate glass as a source of silicon for supplying a plant with silicon in assimilable form. It also relates to a method of treating a plant using this aluminosilicate glass. Finally, as a new product, it relates to powders of this aluminosilicate glass.
  • the invention finds application in particular in the agricultural field.
  • Silicon is an element favoring the good vegetative development of plants, such as for example Solanaceae, Astéereaceae, Poaceae and Sinapis Alabae.
  • silicon can only be assimilated by plants in the form of silicic acid. It is usually transported in the transpiratory flow from the roots to the aerial organs where it is accumulated and precipitates to form biogenic opals called phytoliths.
  • silicon increases the productivity and quality of agricultural crops.
  • silicon has been shown to improve drought tolerance and slow wilt in some plants when irrigation is delayed. It can also increase the strength of rice or wheat stalks, thus preventing them from collapsing in heavy rain or windy weather.
  • compositions which make it possible to supply silicon to a plant, in an assimilable form.
  • the aim of the present invention is to solve the technical problem consisting in providing a source of silicon which can be assimilated by plants and which leads to the formation of a large quantity of phytoliths, which can be obtained and used from a simple and inexpensive way on an industrial scale.
  • aluminosilicate glasses used in particular in the form of particles, are particularly effective for supplying a plant with silicon in an assimilable form. It has been shown, in particular, that these glasses lead to the formation of high amounts of phytoliths, unlike the sources of silicon described in the state of the art. In addition, it has been observed that this supply of silicon can be obtained with particles of larger dimensions than those described in document WO 2010/040176, the production of which is consequently less expensive on an industrial scale. Finally, these aluminosilicate particles can be formulated without difficulty in fertilizer compositions, in particular in the form of granules, making their use in agriculture particularly simple.
  • silica although a structural constituent of glass, dissolves at the same time as the other constituents, in acidic media identical to the organic acids released by plants. As a result, the supply of silicon to the plants takes place in a progressive and controlled manner.
  • this aluminosilicate glass does not dissolve or very little in an aqueous medium close to a neutral pH, which makes it possible to formulate it within fertilizer composition, especially in the form of granules.
  • the present invention relates to the use of an aluminosilicate glass comprising the following constituents, in a weight content varying within the limits defined below:
  • the present invention relates to a method for treating a plant, characterized in that, with a view to providing this plant with silicon in assimilable form, the said plant, or the growth medium, is applied. of said plant, an aluminosilicate glass as defined in the description which follows.
  • the present invention relates to an aluminosilicate glass powder as defined above, said powder having a particle size distribution such that the median diameter by volume of these particles “D50” is between 60 and 250 microns, preferably between 75 and 180 microns. Definitions
  • Plant the plant considered as a whole, including its root system, its vegetative system, seeds, seeds and fruits;
  • Particle "diameter” the diameter of the volume equivalent sphere of said particle
  • DX is the value expressed in microns of the particle diameter such that, in a given sample of particles, and taking into account a particle size distribution by volume, X% of the distribution has a diameter smaller than this diameter DX; for example, in the case of a powder having a D90 equal to 300 microns, the particles having a diameter less than 300 microns occupy 90% of the total volume of the sample.
  • the value DX corresponds to the diameter for which the cumulative function is X%; the particle size distribution by volume can be obtained in particular by laser diffraction;
  • “Fertilizing material” any product or any composition the use of which is intended to ensure or improve the physical, chemical or biological properties of soils as well as plant nutrition;
  • “Fertilizer” any fertilizing material the main function of which is to supply plants with nutrients which may be major or secondary nutrients or trace elements;
  • Silicon accumulator plant any plant likely to contain more than 1% (weight / weight) of silicon relative to the dry mass of the plant and an Si / Ca molar ratio greater than 1.
  • the aluminosilicate glass used according to the invention comprises the following constituents, in a weight content varying within the limits defined below:
  • the Si0 content is preferably within a range ranging from 35 to 49%, in particular from 36 to 45%, or even from 38 to 44%.
  • the Al 2 O 3 content is preferably within a range ranging from 12 to 25%, in particular from 14 to 24%, or even from 15 to 23%.
  • an aluminosilicate glass having contents of Si0 2 and Al 2 0 3 falling within the general and preferred ranges defined above, has the advantageous property of being able to dissolve congruently under the action of organic acids. released by plants and thus release silicon that can be directly assimilated by plants. It has also been observed that such a glass does not dissolve or very little in aqueous media close to neutral pH, which is particularly advantageous from an industrial point of view insofar as this glass can be used without particular constraint in the preparation of fertilizers, in particular in the form of granules.
  • the sum of the contents of CaO, MgO, Na 2 0 and K 2 0 is preferably within a range ranging from 20 to 40%, in particular from 25 to 35% .
  • the presence of these alkaline-earth and alkaline oxides makes it possible to facilitate the melting of the glass and also contributes favorably to the dissolution of the glass in contact with organic acids.
  • the CaO content is preferably within a range ranging from 8 to 30%, preferably from 10 to 30%, in particular from 12 to 28%.
  • the MgO content is preferably within a range ranging from 1 to 15%, in particular from 1 to 12%, or even from 1 to 11%.
  • the Na 2 0 content is preferably within a range ranging from 0 to 12%, in particular from 1 to 10%.
  • the K 2 0 content is preferably in a range ranging from 0 to 8%, preferably from 1 to 8%, in particular from 1 to 7%, or even from 1 to less than 5%.
  • the sum of the CaO and MgO contents is within a range ranging from 25 to 40%, in particular from 27 to 35% and the sum of the Na 2 0 and K 2 0 contents is within a range ranging from 0 to 6%, in particular from 0 to 5%, or even from 1 to 5%.
  • the sum of the CaO and MgO contents is within a range ranging from 10 to 25%, in particular from 12 to 20% and the sum of the Na 2 0 and K 2 0 contents is included in a range. range ranging from 8 to 15%, in particular from 9 to 13%.
  • the total iron oxide content, expressed in the Fe 2 O 3 form is preferably within a range ranging from 0 to 13%, in particular from 2 to 12%, or even from 4 to 12%.
  • Oxide iron can be present as ferrous oxide FeO and / or ferric oxide Fe 0.
  • the redox, defined as being the ratio of the content of ferrous oxide, expressed in the form FeO, and the total molar content of iron oxide, expressed in the form Fe 2 O 3 is preferably included in a range from 0.1 to 0.9, especially 0.2 to 0.9.
  • the total content of Si0 2 , Al 2 0 3 , CaO, MgO, Na 2 0, K 2 0, and Fe 2 0 3 is at least 94%, in particular at least 95% and even d at least 96% or at least 97%.
  • the P 2 0 5 content is preferably less than or equal to 4%, in particular 3%, or even 2% and even 1%. It is advantageously at most 0.5% and even zero, except for inevitable impurities.
  • the BaO content is preferably less than or equal to 5%, in particular 4%, or even 3% and even 2% or 1%. It is advantageously at most 0.5% and even zero, except for inevitable impurities.
  • the SrO content is preferably less than or equal to 5%, in particular 4%, or even 3% and even 2% or 1%. It is advantageously at most 0.5% and even zero, except for inevitable impurities.
  • the ZnO content is preferably less than or equal to 5%, in particular 4%, or even 3% and even 2% or 1%. It is advantageously at most 0.5% and even zero, except for inevitable impurities.
  • the B 2 0 3 content is preferably less than or equal to 5%, in particular 4%, or even 3% and even 2% or 1%. It is advantageously at most 0.5% and even zero, except for inevitable impurities.
  • the Ti0 2 content is preferably less than or equal to 5%, in particular 4%, or even 3% and even 2% or 1%.
  • the Zr0 2 content is preferably less than or equal to 5%, in particular 4%, or even 3% and even 2% or 1%. It is advantageously at most 0.5% and even zero, except for inevitable impurities.
  • aluminosilicate glass used according to the invention may be present in the chemical composition of the aluminosilicate glass used according to the invention, either voluntarily or as impurities present in the raw materials or originating from the refractories of the furnace. It can be in particular S0 3 , coming from the addition of sodium or calcium sulphate as glass refiner. It goes without saying that the various preferred ranges described above can be freely combined with one another, the various combinations not all being able to be listed for reasons of brevity.
  • the aluminosilicate glass used according to the invention has a chemical composition comprising the following constituents, in a weight content varying within the limits defined below:
  • this glass has a chemical composition comprising the following constituents, in a weight content varying within the limits defined below:
  • the P 2 0 5 content is preferably less than or equal to 4%, in particular 3%
  • the BaO content is preferably less than or equal to 5%, in particular 4%
  • the SrO content is preferably less than or equal to 5%, in particular 4%
  • the ZnO content is preferably less than or equal to 5%, in particular 4%
  • the B 2 0 3 content is preferably less than or equal to 5%, in particular at 4%
  • the Ti0 2 content is preferably less than or equal to 5%, in particular 4%
  • the Zr0 2 content is preferably less than or equal to 5%, in particular 4%.
  • the aluminosilicate glass used according to the invention can be manufactured by any known melting method.
  • a vitrifiable mixture containing natural and / or artificial raw materials is brought to a temperature of at least 1300 ° C., in particular between 1400 and 1600 ° C., in order to obtain a mass of molten glass.
  • the raw materials are chosen in particular from silica sand, feldspars, basalt, bauxite, blast furnace slag, nepheline, nepheline syenite, limestone, dolomite, phonolite, sodium carbonate, carbonate potassium, iron oxide, gypsum, sulphate of sodium, calcium phosphate.
  • the vitrifiable mixture is in particular heated in a glass furnace, by means of flames coming from overhead or submerged burners and / or electrodes, or in a cupola, thanks to the combustion of coke.
  • the aluminosilicate glass is obtained after cooling the vitrified mixture thus prepared.
  • the aluminosilicate glass defined above is preferably used in the form of particles, in particular particles having a size distribution such that the median diameter by volume of these particles “D50” is between 60 and 250 microns, preferably between 75 and 180 microns.
  • these particles will also have a D90 value of between 150 and 600 microns, preferably between 150 and 350 microns, more preferably between 150 and 300 microns.
  • these particles will also have a D10 value of between 10 and 40 microns, preferably between 15 and 30 microns.
  • These particles can be obtained by grinding the glass prepared as indicated above, for example by means of a pendulum mill associated with an aerodynamic selector, or else a ball mill. These particles can also be obtained by grinding glass fibers.
  • the aluminosilicate glass which has just been described can be used advantageously in a method for treating a plant consisting in applying to said plant an effective amount of said glass.
  • this process will be applied to a plant in a suboptimal nitrogen condition, as will be understood in the remainder of this description.
  • the process according to the invention is particularly advantageous since it has been demonstrated that the use of the aforementioned aluminosilicate glass makes it possible to increase the yield under suboptimal conditions of nitrogen supply, up to a level close or even identical to the level obtained under optimal nitrogen supply conditions, thus perfectly meeting the growth needs of the crop.
  • suboptimal nitrogen dose is meant a dose corresponding to a reduction of at least 20%, preferably of at least 30% of the optimum dose calculated to achieve the maximum dose. optimal performance.
  • the optimal dose of nitrogen needed to maximize production is calculated based on the needs of the plant. As shown in Table 1, these needs may vary, in particular depending on the variety and the pedoclimatic conditions.
  • the treatment process according to the invention provides a response to the undesirable effects on the ecological level of fertilization by nitrates (problem of leaching. ) or by urea (volatilization problem).
  • the treated plant is chosen from rice, meadow, rapeseed, sunflower, wheat, oats, sugar cane, barley, soybeans, corn, preferably meadow.
  • the aluminosilicate glass used according to the invention therefore acts as a stimulant of the growth and yield mechanisms, in particular under suboptimal nitrogen supply conditions, in a plant.
  • the present invention thus covers the use of an aluminosilicate glass as defined above for increasing the yield under suboptimal nitrogen conditions in a plant.
  • the term “stimulant of the yield under suboptimal nitrogen supply conditions” is understood to mean the activity allowing an increased increase of at least 10% in the yield under conditions of low nitrogen inputs.
  • the aluminosilicate glass used according to the invention also acts as a nitrogenous efficiency stimulator, in particular under suboptimal nitrogen supply conditions, in a plant.
  • the present invention thus also covers the use of an aluminosilicate glass. as defined above to increase nitrogen efficiency under suboptimal nitrogen conditions in a plant.
  • the term “stimulating nitrogen efficiency under suboptimal nitrogen supply conditions” is understood to mean the activity allowing an increased increase of at least 10% in nitrogen efficiency under conditions of low nitrogen inputs. .
  • an effective amount of a glass of aluminosilicate is supplied to the plant to stimulate yield and nitrogen efficiency under suboptimal nitrogen conditions.
  • effective amount is meant an amount making it possible to increase the yield and nitrogen efficiency of a plant under suboptimal nitrogen supply conditions, by at least 10%, at least 15%, at least. 20%, at least 25%, at least 30%, advantageously at least 30%, at least 35%, at least 40%, at least 45%, advantageously at least 50%, at least 55%.
  • the increase in yield is measured by determining the biomass produced by the plant.
  • the term “increase” is understood to mean relative to the plant which has not received any contribution from a glass of aluminosilicate.
  • the increase in nitrogen efficiency is measured by determining the ratio of yield to the amount of nitrogen supplied to the plant.
  • the term “increase” is understood to mean relative to the plant which has not received any contribution from a glass of aluminosilicate.
  • the aluminum silicate glass is advantageously supplied to the plant by root route.
  • This treatment can in particular be applied in fields but also in greenhouse, optionally in soil-less culture substrates.
  • the aluminosilicate glass is supplied to the plant in an amount ranging from 2 kg / ha (kilograms / hectare) to 1000 kg / ha.
  • the aluminosilicate glass is advantageously spread evenly over a field or a crop of plants.
  • the aluminosilicate glass is supplied to the plant in solid form within powdery / pulverulent or granular fertilizers, preferably in an amount ranging from 5 to 800 kg / ton of fertilizer (T ) and preferably of the order of 50 to 300 kg / ton of fertilizer (T).
  • the aluminosilicate glass can thus be used in addition in fertilizing compositions, such as fertilizers, as a stimulant of yield and nitrogen efficiency. under suboptimal conditions of nitrogen supply in a plant.
  • This glass can in particular be combined with other fertilizing substances conventionally used in fertilizing compositions.
  • an effective amount of an aluminosilicate glass is used in a fertilizing composition in combination with one or more fertilizing substances.
  • the fertilizing substances capable of being used in combination with the aluminosilicate glass can be of varied natures and chosen for example from urea, a nitrogenous solution, ammonium sulphate, ammonium nitrate, natural phosphate, potassium chloride, ammonium sulfate, magnesium nitrate, manganese nitrate, zinc nitrate, copper nitrate, phosphoric acid, boric acid.
  • this additional fertilizing substance is chosen from urea, ammonium sulphate, ammonium nitrate, a nitrogenous solution and / or potassium nitrate.
  • the invention also relates to a method for stimulating the yield and nitrogen efficiency under suboptimal conditions of nitrogen supply in a plant, characterized in that it comprises the supply to said plant or to the soils, of an effective amount aluminosilicate glass as defined above.
  • the aluminosilicate glass according to the invention can be integrated into formulations intended for the preparation of fertilizers in the form of granules.
  • These granules can be prepared in the usual way either by the dry process, for example by compacting the mixture of powders between two cylindrical rollers, or by the wet process, for example by wetting the mixture of powders using a liquid binder, then drying and grading and or sieving.
  • These granules may in particular have the following weight compositions:
  • These granules will preferably be obtained by the wet process by mixing urea, ammonium sulfate, potassium chloride, calcium carbonate and a granulation binder.
  • V / V volume / volume
  • Kg N. ha ⁇ year 1 kilogram of nitrogen per hectare and per year.
  • Figure 1 is a graph showing the impact of a nitrogen fertilizer application on (i) the yield of a cereal (solid lines and diamonds), (ii) the losses of nitrogen by leaching (diagram in bars) and (iii) nitrogen efficiency (dotted and square lines).
  • Figure 2 is a graph showing the percentage of silicon (of an aluminosilicate glass according to the invention) dissolved in various acids.
  • FIG. 3 is a graph showing the percentage of silicon (of an aluminosilicate glass according to the invention, of a calcium silicate, of a diatomaceous earth and of a soda-lime glass) dissolved in various acids. (malic acid A, oxalic acid B, citric acid C and succinic acid D).
  • FIG. 4 reproduces the photographs showing the formation of phytoliths in a sheet of rice (Oryza sativa) treated with an aluminosilicate glass according to the invention (VI) and with sodium silicate.
  • Figure 5 is a graph which represents the yield of ryegrass plants, ie the dry mass of ryegrass plants, (i) with a feed which does not include nitrogen, (bar “0") ; (ii) with a feed which includes 60 Kg. ha 1 of nitrogen, (bar “60”); (iii) with a feed which includes 100 kg. ha 1 of nitrogen, (bar “100”); this dose being considered as the suboptimal nitrogen dose which does not allow optimal yield to be achieved, (iv) with a feed which includes 140 kg. ha 1 of nitrogen, (bar “140”), this dose being considered as the optimum nitrogen dose which makes it possible to achieve the optimum yield and (v) with a feed which comprises 100 kg. ha 1 of nitrogen and 50 kg. ha 1 of a glass of aluminosilicate according to the invention, (“100 + glass of aluminosilicate” bar).
  • Figure 6 is a graph which represents the nitrogen efficiency of ryegrass plants, ie the dry mass of ryegrass plants divided by the quantity of nitrogen supplied, (i) with a feed which includes 60 Kg. ha 1 of nitrogen, (bar “60”); (ii) with a feed which includes 100 kg. ha 1 of nitrogen, (bar “100”); (iii) with a feed which includes 140 Kg. ha 1 of nitrogen, (bar “140”); (optimum nitrogen dose which makes it possible to achieve the optimum yield) and (iv) with a feed which comprises 100 kg. ha 1 of nitrogen and 50 kg. ha 1 of a glass of aluminosilicate according to the invention, (“100 + glass of aluminosilicate” bar).
  • FIG. 7 is a histogram showing the distribution of particle sizes of a glass powder used according to the invention. Description of the embodiments
  • aluminosilicate glass compositions of the invention were prepared by melting a suitable vitrifiable mixture according to a usual method of obtaining a mass of molten glass.
  • the compositions of these two aluminosilicate glasses are given in Table 2 below.
  • the mass of glass obtained was ground using a pendulum mill associated with an aerodynamic selector (mill in which the grinding is obtained by crushing the glass between a fixed cylindrical ring of vertical axis and rollers centrifuged by the rotation of their support).
  • the particle size distribution of the glass particles thus obtained was measured by particle size distribution by laser diffraction and FIG. 7 shows the particle size distribution of these particles.
  • Dispersant alcohol Refractive index (particle): 1.52 Absorption index (particle): 0.01 Stirring speed: 2000 rpm Using ultrasound: no Measurement time: 6 seconds Blank measurement time : 6 seconds Obscuration range: 6.21%.
  • Example 2 Demonstration of the dissolution properties of an aluminosilicate glass according to the invention in the presence of organic acids
  • Plants have the particularity of releasing various organic acids from their roots, such as citric acid, lactic acid, malic acid, oxalic acid, succinic acid, formic acid, acetic acid. , pyruvic acid, maleic acid, oxaloacetic acid, ascorbic acid, isocitric acid.
  • each product 100 mg were placed in a 60 ml pill container. 50 ml of each dissolution medium are added and then stirred continuously using a rotary stirrer (Heidolph reax 2). After 48 hours of stirring, the samples were filtered with a filter paper with a pore diameter of 15 ⁇ m. The dosage of silicon is carried out to determine the percentage of dissolution in each medium.
  • Silicon determination The determination of the silicon (Si) content of the samples was carried out for each sample and for each sampling time, by inductively coupled plasma-optical emission spectroscopy using an ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy, Thermo Elemental Co. Iris Intrepid II XDL).
  • ICP-OES Inductively Coupled Plasma-Optical Emission Spectroscopy, Thermo Elemental Co. Iris Intrepid II XDL.
  • Example 3 Demonstration of the dissolution properties of an aluminosilicate glass according to the invention in the presence of organic acids in comparison with other forms of silicon
  • particles of glass 1 prepared according to example 1 were treated according to the following protocol:
  • the medium 1. based on malic acid is composed of: 360 ml of 0.5M Na 2 HP0 4 , 220 mL of 0.5M malic acid made up to 2L with ultrapure water. The measured pH is 4.9
  • the citric acid-based medium 2. is composed of: 360 mL of 0.5M Na 2 HP0 4 , 220 mL of 0.5M citric acid made up to 2L with ultrapure water. The measured pH is 4.5
  • the medium 3. based on oxalic acid is composed of: 360 mL of 0.5M Na 2 HP0 4 , 220 mL of 0.5M oxalic acid made up to 2L with ultrapure water.
  • the measured pH is 4.2
  • the succinic acid-based medium is composed of 2% succinic acid prepared with 40 g of succinic acid made up to 2L with ultrapure water.
  • the measured pH is 2.4
  • the determination of the silicon (Si) content of the samples was carried out for each sample and for each sampling time, by inductively coupled plasma-optical emission spectroscopy using an ICP-OES (Inductively Coupled Plasma- Optical Emission Spectroscopy, Thermo Elemental Co. Iris Intrepid II XDL).
  • ICP-OES Inductively Coupled Plasma- Optical Emission Spectroscopy, Thermo Elemental Co. Iris Intrepid II XDL.
  • the aluminosilicate glass according to the invention is gradually dissolved in the presence of organic acids usually released by plants, such as malic acid A, oxalic acid B, citric acid C or succinic acid D).
  • organic acids usually released by plants, such as malic acid A, oxalic acid B, citric acid C or succinic acid D.
  • no release of silicon occurs in these media for the products of diatomaceous earth or soda-lime glass.
  • Example 4 Demonstration of the formation of phvtoliths in a plant treated with an aluminosilicate glass according to the invention.
  • the plants were watered at a frequency of three times per week with a Hoagland solution composed of: KN0 3 (0.2mM); Ca (N0 3) 2 .4H 2 0 (0.4mm); KH 2 P0 4 (0.2mM);
  • the experiment was carried out in a cultivation greenhouse at 22 ° C with a photoperiod of 12h day / 12h night. The plants were harvested 48 days after application of the treatment.
  • a middle section of each leaf blade was cut along the leaf of each plant, placed between two microscopic slides, and then placed in a muffle oven at 500 ° C for 3 hours for complete charring of the leaf samples. After a cooling time, the slides are placed under a fluorescence microscope (Zeiss Axio Observer Zl) with a magnification of x10.
  • the autofluorescence of the phytoliths was measured using a GFP filter, with excitation between 450-490 nm and emission between 500-550 nm.
  • the quantification of the phytoliths was carried out using “Zen 2 Pro” software. By preselecting an area of the same air on the image and for each modality, the number of phytoliths is calculated using software in "number of phytoliths.” mm 2 ”.
  • plants treated with aluminosilicate glass show a greater accumulation of phytoliths in the leaves.
  • the number of phytoliths in the presence of aluminosilicate glass increases by + 86%, compared to the control, and by + 93%, compared to sodium silicate. This reflects better absorption of silicon by the plant in the presence of the aluminosilicate glass according to the invention.
  • Example 5 Demonstration of the improvement in yield and nitrogen efficiency under suboptimal nitrogen conditions in a plant treated with an aluminosilicate glass according to the invention
  • Seeds of ryegrass, Lolium perenne L. VarAbys were sown at a density of 240 Kg. Ha 1 (corresponding to 2 g of seeds per pot) in 2 L pots containing a mixture of soil and sand ( 50/50 - V / V) then placed in a greenhouse under the following conditions: daytime temperature of 25 ° C and a 12h photoperiod / nighttime temperature of 20 ° C and a 12h photoperiod.
  • the soil used had the following characteristics: sandy loam soil, pH 7.1 and contained 1.6% organic matter. During the entire test period, the plants were watered by weight so as to maintain the soil at 70% of its capacity in the field.
  • watered by weight used in the present description means that the watering is carried out in an amount making it possible to compensate for the water losses which may occur by evapotranspiration. In this case, the water is added in an amount to bring the weight of the pot back to its initial weight.
  • the plants were watered by weight throughout the test period so as to maintain the soil at 70% of its capacity in the field.
  • FIG. 5 shows that the plants which have received the suboptimal dose of nitrogen and the glass of aluminosilicate have the same yield as the plants which have received the optimum dose of nitrogen (140 kg. Ha 2 ). This result shows that the aluminosilicate glass according to the invention stimulates the yield under suboptimal nitrogen conditions, and makes it possible to achieve the same yield as that obtained with the plants having received the optimum dose of nitrogen.

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EP20796635.9A 2019-10-08 2020-10-06 Utilisation d'un verre d'aluminosilicate pour apporter à une plante du silicium sous forme assimilable, procédé de traitement d'une plante utilisant ce verre et nouvelle poudre dudit verre Pending EP4041699A1 (fr)

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FR1911152A FR3101630B1 (fr) 2019-10-08 2019-10-08 Utilisation d’un verre d’aluminosilicate pour apporter à une plante du silicium sous forme assimilable, procédé de traitement d’une plante utilisant ce verre et nouvelle poudre dudit verre
PCT/FR2020/051744 WO2021069825A1 (fr) 2019-10-08 2020-10-06 Utilisation d'un verre d'aluminosilicate pour apporter à une plante du silicium sous forme assimilable, procédé de traitement d'une plante utilisant ce verre et nouvelle poudre dudit verre

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BR (1) BR112022005784A2 (es)
CA (1) CA3153122A1 (es)
CL (1) CL2022000849A1 (es)
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FR2591423B1 (fr) * 1985-12-17 1988-09-16 Saint Gobain Isover Verres nutritifs pour l'agriculture
US5082488A (en) * 1990-06-20 1992-01-21 Mao Raymond L Van Soil conditioning
GB2455974A (en) * 2007-12-20 2009-07-01 United States Borax Inc Boron-containing compositions
AU2009301632B2 (en) 2008-10-08 2013-10-24 MaxSil Pty Ltd Silicon-containing glass powder particles to improve plant growth
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CN114787107A (zh) 2022-07-22
AR121177A1 (es) 2022-04-27
FR3101630A1 (fr) 2021-04-09
MX2022004210A (es) 2022-07-19
CA3153122A1 (fr) 2021-04-15
CL2022000849A1 (es) 2022-11-18
CO2022004273A2 (es) 2022-05-20
US20240025815A1 (en) 2024-01-25
BR112022005784A2 (pt) 2022-06-21
WO2021069825A1 (fr) 2021-04-15

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