Fertilizing composition based on renewable phosphate fertilizers

Abstract

The present invention relates to a fertilizing composition based on renewable phosphate fertilizers by proposing a composition that comprises struvite, at least two trace elements, at least one secondary element, and at least one clay.

Description

Description Title of the invention: Fertilizing composition based on renewable phosphate fertilizers.

[0001] TECHNICAL FIELD

[0002] The present invention relates to a fertilizing composition based on renewable phosphate fertilizers.

[0003] STATE OF THE ART

[0004] Phosphate is used extensively in the form of chemical fertilizers in our agriculture. Each year, more than 45 million tons of phosphate fertilizers are consumed worldwide to meet global food demand. However, the phosphorus used for fertilizer production comes from non-renewable resources. In addition to their negative impact on mycorrhizae, the depletion of phosphorus resources poses a major risk to food security. With this in mind, it is imperative to find solutions to limit the use of non-renewable phosphate fertilizers.

[0005] In view of the above, there is therefore a need for a fertilizing composition based on renewable phosphate fertilizers.

[0006] DESCRIPTION OF THE INVENTION

[0007] The inventors surprisingly determined that the fertilizing composition according to the invention based on renewable phosphate fertilizers made it possible to improve plant nutrition more effectively than conventional phosphate fertilizers such as DAP or struvite alone (see examples).

[0008] Struvite is a mineral in the hydrated phosphate family, a double ammonium magnesium phosphate hexahydrate with the chemical formula NH4MgPO4. It is a mineral naturally present in manure and guano, as well as in urine and renal tract pathologies.

[0009] Struvite contains approximately per kilogram of crystalline struvite 126.2 g of phosphorus or 387.0 g of phosphate 57.1 g of nitrogen or 73.5 g of ammoniacal nitrogen and 99.0 g of magnesium.

[0010] Struvite is a problem in wastewater treatment plants due to the accumulation of its crystals in pipes and a reduction in water flow. Currently, many methods exist to control struvite nucleation in wastewater treatment plants and reduce the amount of phosphate entering water bodies.

[0011] There is considerable interest in recycling phosphorus (P) in the form of struvite for environmental, economic, and commercial reasons. Rather than generating a waste product for disposal, recovered struvite phosphate can be advantageously used as a fertilizer and also deserves the designation "renewable fertilizer" due to its source.

[0012] An additional advantage of struvite is its limited solubility. The fertilizer dissolves over time to provide nutrients at a rate that plants can utilize. Highly soluble fertilizers tend to release nutrients at a faster rate than plant absorption, resulting in fertilizer waste and negative environmental impacts.

[0013] The use of struvite alone as a phosphate fertilizer is unfortunately not as effective as conventional phosphate fertilizers. The present invention addresses this need by providing a struvite-based composition that improves plant nutrition more effectively than conventional phosphate fertilizers such as DAP or struvite alone (see examples).

[0014] The fertilizing composition according to the invention comprises struvite, at least two trace elements, at least one secondary element, and at least one clay.

[0015] The at least first and second trace elements may be selected from the group consisting of Manganese, Manganese Sulfate, Iron, Zinc, Zinc Oxide, Zinc Sulfate, Copper, Molybdenum, Cobalt, Sodium Chloride, Sodium Chloride, potassium, ferric sulfate, copper sulfate, cobalt chloride, chlorine, boron, nickel, vanadium, silicon, iron chelate, copper chelate, zinc chelate, manganese chelate, boron chelate, molybdenum chelate, selenium, sodium selenite, preferably molybdenum, nickel, copper, zinc, zinc oxide, manganese, boron, iron, selenium, sodium selenite and chlorine, more preferably zinc oxide and selenium or sodium selenite, even more preferably the first trace element is selenium and the second trace element is zinc oxide.

[0016] The at least one secondary element may be selected from the group consisting of urea, magnesium, magnesium carbonate, ammonium, ammonium chloride, ammonium molybdate, ammonium sulfate, magnesium oxide, magnesium chloride, ammonium nitrosulfate, potassium nitrate, ammonium sulfate, ammonium nitrate, calcium nitrate, potassium sulfate, monoammonium phosphate, potassium chloride, calcium chloride, calcium sulfate, magnesium sulfate, magnesium chloride, sodium chloride, diammonium phosphate, ammonium chloride, monocalcium phosphate, dicalcium phosphate, tricalcium phosphate, simple superphosphate, triple superphosphate, zinc sulfate, iron sulfate, calcium phosphate, monopotassium phosphate, sodium nitrate, nitrate magnesium, potassium phosphate, potassium bicarbonate, potassium sulfite, calcium sulfate,Potassium Oxide, Ammonium Phosphate, Magnesium Oxide, Polyphosphate, Ammonium Sulfamate, Ammonium Carbonate, Sulfur, Potassium Carbonate, Potassium Hydrogen Phosphate, preferably Ammonium Sulphate.,

[0017] The at least one clay may be selected from the group consisting of sepiolite, bentonite, kaolinite, illite, montmorillonite, vermiculite, halloysite, attapulgite, saponite, chlorite, mica, illite-montmorillonite, smectite, heulandite and mixtures thereof, preferably sepiolite.

[0018] According to one embodiment, the fertilizing composition according to the invention comprises: - between 5% and 98.9%, between 25% and 98%, between 50% and 97.5%, between 75% and 97%, between 85% and 96%, or between 87% and 94%, preferably between 88% and 92% by weight of struvite; - between 0.005% and 10%, between 0.01% and 5%, between 0.025% and 2.5%, or between 0.05% and 1%, preferably between 0.1% and 0.55% by weight of a first trace element; - between 0.005% and 10%, between 0.01% and 5%, between 0.05% and 4%, or between 0.1% and 3%, preferably between 0.5% and 2.8% by weight of a second trace element; - between 0.25% and 10%, between 0.5% and 5%, or between 0.75% and 4.5%, preferably between 1% and 4% by weight of a secondary element; and - between 0.1% and 10%, between 0.25% and 5%, or between 0.5% and 3%, preferably between 0.6% and 2.6% by weight of at least one clay.

[0019] According to a preferred embodiment of the invention, the fertilizing composition according to the invention comprises between 5% and 98.9%, between 25% and 98%, between 50% and 97.5%, between 75% and 97%, between 85% and 96%, or between 87% and 94%, preferably between 88% and 92% by weight of struvite; between 0.005% and 10%, between 0.01% and 5%, between 0.025% and 2.5%, or between 0.05% and 1%, preferably between 0.1% and 0.55% by weight of selenium; between 0.005% and 10%, between 0.01% and 5%, between 0.05% and 4%, or between 0.1% and 3%, preferably between 0.5% and 2.8% by weight of zinc oxide; between 0.25% and 10%, between 0.5% and 5%, or between 0.75% and 4.5%, preferably between 1% and 4% by weight of ammonium sulfate; and between 0.1% and 10%, between 0.25% and 5%, or between 0.5% and 3%, preferably between 0.6% and 2.6% by weight of sepiolite.

[0020] According to one embodiment, the fertilizing composition according to the invention is in the form of a powder, an emulsion in water, or in granulated form, preferably in granulated form.

[0021] Preferably, the fertilizer composition is applied at a rate of 2.5 to 500 kg / ha, 5 to 200 kg / ha, 10 to 100 kg / ha, preferably 15 to 50 kg / ha.

[0022] According to one embodiment, the fertilizing composition according to the invention further comprises between 0.1% and 15% of at least one mycorrhizal fungus.

[0023] The inventors surprisingly determined that the use of the composition according to the invention in combination with at least one mycorrhizal fungus made it possible to ensure and improve plant nutrition by increasing the phosphorus content in the plants while promoting the development of mycorrhizae, unlike the use of conventional phosphate fertilizers such as DAP or struvite alone.

[0024] In a preferred embodiment, the mycorrhizal fungus is selected from the group consisting of an arbuscular mycorrhizal fungus, an ecto-mycorrhizal fungus, an ectendo-mycorrhizal fungus and an ericoid mycorrhizal fungus or a combination thereof.

[0025] Arbuscular mycorrhizal fungi are characterized by exhibiting intracellular growth within plant cells where they form arbuscules and vesicles. Arbuscules are highly branched, tree-like structures that contribute to the exchange of carbon and nutrients, such as nitrogen and phosphate. Vesicles are bladder-like structures, which are attributed with the function of nutrient storage. Arbuscular mycorrhizal fungi form underground fruiting bodies. Preferred embodiments include, but are not limited to, Glomus mosseae and Glomus intraradices.

[0026] Ecto-mycorrhizal fungi do not form arbuscules and vesicles. Instead, ecto-mycorrhizal fungi grow around and inside the roots where they form a specific structure, called a "salt net." The fungal threads that form the Hartig net grow intercellularly. As they grow around the roots, ecto-mycorrhizal fungi form a layer around the root. The color and shape of the layer can vary depending on the species of ecto-mycorrhizal fungi. In the Hartig network, there is an exchange of nutrients, particularly nitrogen and phosphate, and carbon. Ecto-mycorrhizal fungi form aerial fruiting bodies. Preferred embodiments include, but are not limited to, Laccaria laccata, Boletus edulis, Cantharellus cibarius, and Paxillus involutus.

[0027] Ectomycorrhizal fungi are characterized in that they do not form arbuscules and vesicles and grow intracellularly in the root cells. Ectomycorrhizal fungi also form a so-called "salted net", but this is significantly finer than with ectomycorrhizal fungi. Ectomycorrhizal fungi can form an aerial fruiting body. Preferred embodiments relate to, but are not limited to, Tuber, Tricharlna and Wilcoxina species.

[0028] Ericoid mycorrhizal fungi are characterized by intracellular growth in root cells. Ericoid mycorrhizal fungi do not form a layer, a so-called "Hartig" filament, arbuscules, or vesicles. Ericoid mycorrhizal fungi form characteristic curved structures. Preferred embodiments include, but are not limited to, Hymenoscyphus ericae, Rhizoscyphus spp., and Oidiodendron spp.

[0029] Said mycorrhizal fungi, in particular a combination of different mycorrhizal fungi or different types of mycorrhizal fungi, are suitable according to the invention. These combinations have an advantageous effect in particular due to the compatibility that occurs between the different species. The overlap of non-corresponding properties such as cold tolerance, adaptation to soil conditions, tolerance to drought or waterlogging or cooperation with the plant species of choice leads to an advantage when using different species or different types of mycorrhizal fungi.

[0030] According to one embodiment, the fertilizing composition according to the invention is included in or consists of the core of a granular fertilizer.

[0031] According to one embodiment, the final product intended to be applied in the soil is the combination by mixing (blend) or by granulation of the composition according to the invention with additional raw materials.

[0032] The fertilizing composition according to the invention may further comprise or be combined with other components chosen for example from binders, additives, fillers, fillers and minerals.

[0033] The fertilizer composition may include or be combined with, but is not limited to: ammonium sulfate, ammonium nitrate, ammonium sulfate nitrate, ammonium chloride, ammonium bisulfate, ammonium polysulfide, ammonium thiosulfate, aqueous ammonia, anhydrous ammonia, ammonium polyphosphate, aluminum sulfate, calcium nitrate, calcium ammonium nitrate, sulfate, calcined magnesite, calcitic limestone, calcium oxide, calcium nitrate, dolomitic limestone, hydrated lime, calcium carbonate, diammonium phosphate, monoammonium phosphate, magnesium nitrate, magnesium sulfate, potassium nitrate, potassium chloride, potassium carbonate, potassium magnesium sulfate, potassium sulfate, sodium nitrates, magnesium limestone, magnesia, urea, urea-formaldehydes, urea ammonium nitrate, urea coated with sulfur, polymer-coated urea, isobutylidene diurea, K2SO4-2MgSO4, kainite, sylvinite,kieserite, Epsom salts, elemental sulfur, marl, crushed oyster shells, fish meal, fish cakes, fish manure, blood meal, phosphate rock, super phosphates, slag, bone meal, fish wood, manure, bat guano, peat moss, compost, green sand, cottonseed meal, feather meal, crab meal, fish emulsion, amino acid hydrolysates, sugars, organic acids, diamines and polyamines, humic extracts, organic amendments, biostimulants, seaweed extracts, plant extracts, live microorganisms, microorganism extracts or a combination thereof., Preferably between 0% and 80%, more preferably between 0% and 70%, more preferably between 0% and 50% by weight of the above compounds is present in the combination resulting from said compound(s) with the fertilizing composition according to the invention.

[0034] According to another aspect of the invention, the fertilizing composition according to the invention is combined with at least one other complementary fertilizer chosen from nitrogen fertilizers, potassium fertilizers, phosphate fertilizers, binary (NP,PK) and ternary (NPK) fertilizers as well as their combinations, and optionally in association with calcium amendments, boric acid, leonardite, organic amendments and feldspar, one or more biostimulants chosen from the group consisting of amino acid hydrolysates, humic extracts, algae extracts, plant extracts, live microorganisms, microorganism extracts and combinations thereof.

[0035] Said combination of the fertilizing composition according to the invention with at least one other complementary fertilizer can be used in granular, emulsion or powder form, preferably in that it is applied at a rate of 2.5 to 500 kg / ha, 5 to 200 kg / ha, 10 to 100 kg / ha, preferably 15 to 50 kg / ha.

[0036] According to one embodiment, the sugars are chosen from mono- and di-saccharides, preferably sucrose, fructose, trehalose, glucose, arabinose, maltose, as well as mixtures thereof.

[0037] According to one embodiment, the amino acids are selected from threonine, lysine, phenylalanine, glutamic acid, methionine, GABA, ornithine, glycine, glutamine, aspartic acid, serine, asparagine, tyrosine, tryptophan, valine, leucine, isoleucine, proline, 4-hydroxyproline, arginine, histidine, alanine, cysteine ​​and mixtures thereof.

[0038] According to one embodiment, the organic acids are chosen from lactic acid, succinic acid, oxalic acid, gluconic acid, threonic acid, fumaric acid, syringic acid and mixtures thereof.

[0039] According to one embodiment, the diamines and polyamines are chosen from cadaverine, putrescine, spermidine, spermine and mixtures thereof.

[0040] According to one embodiment, the organic amendment is chosen from bovine, ovine, porcine, mink, rabbit and hen droppings.

[0041] According to one embodiment, the living microorganisms or the extracts of microorganisms are chosen from the family of Thiorhodaceae, Athiorhodaceae, Chlorobacteriaceae, Nitrobacter, preferably of the genus Nitrosomonas or Nitrobacter, Thiobacteriaceae preferably of the genus Thiobacillus, Methanomonadaceae preferably of the genus Hydrogenomonas, Carboxydomonas or Methanomonas, Caulobacteriaceae, Siderocapsaceae, Pseudomonaceae preferably of the genus Pseudomonas, Xanthomonas, Acetobacter or Azotomonas, Spirillaceae preferably of the genus Vibrio, Cellvibrio, Cellfalcicula, Desulfovibrio or Spirillum, Azotobacteriaceae preferably of the genus Azotobacter, Beijerinckia or Derxia, Rhizobacteriaceae preferably of the genus Rhizobium, Chromobacterium or Agrobacterium, Achrobacterium preferably of the genus Achromobacter or Flavobacterium, Enterobacteriaceae preferably of the genus Escherichia, Proteus, Aerobacter or Serratia, Micrococcaceae preferably of the genus Micrococcus or Sarcina, Brevibacteriaceae preferably of the genus Brevibacterium, Lactobacillaceae preferably of the genus Streptococcus, Leuconostoc or Lactobacillus, Corynebacteraceae preferably of the genus Corynebacterium, Cellulomonas or Arthrobacter, Bacillaceae preferably of the genus Bacillus or Clostridium, and mixtures thereof.Preferably, the live microorganisms or microorganism extracts are chosen from the species Pichia guilliermondii, Azotobacterchroococcum, Azotobacter vinelandii, Azospirillum lipoferum, Bacillus megaterium, Bacillus aryabhattai, Bacillus amiloliquefaciens, Bacillus licheniformis and Oceanobacillus picturae, and mixtures thereof.

[0042] According to another aspect of the invention, the subject of the invention is a method of fertilizing the soil comprising the application of the fertilizing composition according to the invention on or in said soil, preferably in that said composition according to the invention is applied at a rate of 2.5 to 500 kg / ha, 5 to 200 kg / ha 10 to 100 kg / ha, preferably 15 to 50 kg / ha.

[0043] According to one embodiment, the method of fertilizing the soil comprises the application of the fertilizing composition according to the invention on or in said soil for the cultivation of leafy vegetables, fruit vegetables, root vegetables, cereals, flowers, ornamental crops or vegetable crops, preferably for the cultivation of corn, potatoes, beetroot, rapeseed, sunflower, soybean, lettuce or grass.

[0044] According to another aspect of the invention, the invention relates to the use of the fertilizing composition according to the invention for growing leafy vegetables, vegetables fruit, root vegetables, cereals, flowers, ornamental crops or vegetable crops, preferably for growing corn, potatoes, beetroot, rapeseed, sunflower, soybeans, lettuce or lawn grass. For example, the use of a fertilizer for growing tuber plants such as potatoes or leafy plants such as lettuce.

[0045] BRIEF DESCRIPTION OF THE FIGURES

[0046] [Fig.1] Dry weight of soybean roots at BBCH 10, 13 days after treatment application.

[0047] [Fig.2] P concentration in soybean leaves at BBCH 15.

[0048] [Fig.3] Soybean yield in T / Ha.

[0049] [Fig.4] Dry aboveground biomass of lettuce (average g / plant).

[0050] EXAMPLES

[0051] Example 1: Effect of the fertilizer composition according to the invention on the growth, absorption of nutrients and yield of soybeans.

[0052] Materials and methods - Culture: soybean, top 5 commercial variety - 5 repetitions on a random complete block - N and K fertilization: Conventional fertilization - Homogeneous culture and soil (pH 6.5)

[0053] [Table 1] Table 1: Composition C1 according to the invention

[0054] [Table 2] Table 2: Testing modalities

[0055] [Table 3] Table 3: Soybean plant analyses

[0056] Results

[0057] The application of the products (C1, DAP) did not induce phytotoxicity on the plant and the vigor of the emergence was similar for all treatments (data not shown).

[0058] At BBCH 11 (13 days after treatment application), we observed a strong increase in root biomass in the C1-treated plant compared to DAP and the untreated plant (+6.8% and +12.5% ​​respectively) (see Figure 1). The differences were significant at p=0.05.

[0059] Interestingly, increased root growth induced higher phosphorus concentration in leaves (see Figure 2) in the plant treated with C1, which shows that the form of phosphorus in the C1 product is rapidly available when applied very close to the seed.

[0060] The good start effect of composition C1 on soybeans induced a better final yield (see Figure 3) compared to the untreated (+250kg / ha, +5.6%). We also observed a better yield compared to DAP (+110kg).

[0061] [Table 4] Table 4: Final yield of soybeans

[0062] Example 2: Study of the effects of a microgranulated solid starter fertilizer according to the invention on the growth of salads, compared to pure struvite.

[0063] The trial was conducted on the Kyra lettuce variety. The seeds were sown in 6-well plates containing seedling compost (G0M8) and placed in favorable conditions to initiate germination.

[0064] Two weeks after sowing, the most uniform seedlings were repotted into 4L pots containing a 50 / 50 potting soil / sand mixture. The pots were then placed in a greenhouse for the rest of the trial.

[0065] A nutrient solution was applied to all methods one week after repotting. Fertilization was optimal for all methods. The products were applied to the soil, in contact with the root ball at the time of transplanting (see methods table).

[0066] [Table 4] Table 4: Test modalities

[0067] Statistical analysis (with ANOVA p value written) of dried biomass:

[0068] Results

[0069] [Table 5] Table 5: Average dry biomass of g / plant

[0070] Composition C1 according to the invention made it possible to significantly increase (p=0.1%) the production of dry biomass compared to the control and struvite (see Figure 4).

Claims

Claims

1. A fertilizer composition comprising struvite, at least one first and one second trace element, at least one secondary element, and at least one clay.

2. Fertilizing composition according to claim 1, characterized in that it comprises: - between 5% and 98.9% by weight of struvite; - between 0.005% and 10% by weight of a first trace element; - between 0.005% and 10% by weight of a second trace element; - between 0.25% and 10% by weight of a secondary element; and - between 0.1% and 10% by weight of at least one clay.

3. Fertilizer composition according to claim 1 or 2, characterized in that the at least first and second trace elements can be selected from the group consisting of Manganese, manganese sulfate, Phosphorus, Iron, Zinc, zinc oxide, zinc sulfate, Copper, Molybdenum, Cobalt, Sodium chloride, Ammonium chloride, ammonium molybdate, Ammonium sulfate, Potassium chloride, ferric sulfate, copper sulfate, cobalt chloride, Chlorine, Boron, Nickel, Vanadium, silicon, iron chelate, copper chelate, zinc chelate, manganese chelate, boron chelate, molybdenum chelate, Selenium, sodium selenite, preferably molybdenum, nickel, copper, zinc, zinc oxide, manganese, boron, iron, selenium, sodium selenite and chlorine, more preferably zinc oxide and selenium or sodium selenite,even more preferably the first trace element is selenium and the second trace element is zinc oxide.,

4. Fertilizing composition according to claim 1 to 3, characterized in that the at least one secondary element can be selected from the group consisting of urea, magnesium, magnesium carbonate, magnesium oxide, magnesium chloride, ammonium nitrosulfate, potassium nitrate, ammonium sulfate, ammonium nitrate, potassium nitrate calcium, Potassium sulfate, Monoammonium phosphate, Potassium chloride, Calcium chloride, Calcium sulfate, Magnesium sulfate, Magnesium chloride, Sodium chloride, Diammonium phosphate, Ammonium chloride, Monocalcium phosphate, Dicalcium phosphate, Tricalcium phosphate, Simple superphosphate, Triple superphosphate, Zinc sulfate, Iron sulfate, Calcium phosphate, Monopotassium phosphate, Sodium nitrate, Magnesium nitrate, Potassium phosphate, Potassium bicarbonate, Potassium sulfite, Calcium sulfate, Potassium oxide, Ammonium phosphate, Magnesium oxide, Polyphosphate, Ammonium sulfamate, Ammonium carbonate, Sulfur, Potassium carbonate, Hydrogen phosphate potassium, preferably ammonium sulfate.

5. Fertilizing composition according to claim 1 to 4, characterized in that the at least one clay is selected from the group consisting of sepiolite, bentonite, kaolinite, illite, montmorillonite, vermiculite, halloysite, attapulgite, saponite, chlorite, mica, illite-montmorillonite, smectite, heulandite and mixtures thereof, preferably sepiolite.

6. Fertilizing composition according to any one of claims 1 to 5, characterized in that it is in powder form, in the form of an emulsion in water or in granulated form, preferably in granulated form.

7. A method of fertilizing soil comprising applying the fertilizing composition according to any one of claims 1 to 6 to or in said soil.

8. Method according to claim 7, characterized in that said fertilizing composition is applied at a rate of 2.5 to 500, 5 to 200 kg / ha, 10 to 100 kg / ha, preferably 15 to 50 kg / ha.

9. Use of the fertilizer composition according to any one of claims 1 to 6 for growing leafy vegetables, fruit vegetables, root vegetables, cereals, flowers, ornamental crops, and crops vegetable gardens, preferably for growing corn, potatoes, beetroot, rapeseed, sunflowers, soybeans, lettuce or grass.

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