Water-soluble fertilizer and its preparation method and application

Abstract

The present invention provides a water-soluble fertilizer, a preparation method and application thereof. In parts by weight, the water-soluble fertilizer includes 75 to 99 parts of yeast metabolites, 0.2 to 12 parts of yeast glycosides and 0.3 to 7 parts of alginate-rich substances; wherein yeast metabolites include soluble organic matter, yeast-derived biochemical fulvic acid, soluble added elements, free amino acids and organic acids; yeast glycosides include nucleic acids, mannans and small peptides. After a large number of creative experiments and studies, the inventors found that compounding a specific amount of yeast metabolites with yeast glycosides and alginate-rich substances and applying them to crop planting can achieve unexpected results, can effectively promote root growth, and the technical solution provided by the present application can effectively exert the synergistic effect of yeast metabolites, yeast glycosides and alginate-rich substances, thereby increasing crop yields.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizer preparation, and in particular to a water-soluble fertilizer and a preparation method and application thereof. Background Art

[0002] With the promotion of "water-fertilizer integration" technology and the improvement of irrigation facilities, the development prospects of water-soluble fertilizers in my country are becoming increasingly broad.

[0003] Water-soluble fertilizer is a multi-component compound fertilizer that can be completely soluble in water. It can dissolve quickly in water and is more easily absorbed by crops. Its absorption and utilization rate is relatively high. It can be used in facility agriculture such as sprinkler and drip irrigation to achieve water-fertilizer integration and achieve the effect of saving water, fertilizer and labor.

[0004] At present, water-soluble root-promoting fertilizers have the following problems: first, too much attention is paid to the mineral nutrient content of fertilizers while ignoring the combination with soil improvement, which leads to poor root growth of crops and affects the absorption and utilization of nutrients; second, many fertilizer products contain exogenous hormones or chemically synthesized plant growth regulators, which are non-natural ingredients. Long-term use can easily cause premature aging of crops and even lead to green and health problems of agricultural products.

[0005] Therefore, researching and developing a water-soluble fertilizer that can improve the absorption of nutrients and the growth of crop taproots, lateral roots and root hairs is of great significance for increasing crop yields. Summary of the Invention

[0006] The main purpose of the present invention is to provide a water-soluble fertilizer and its preparation method and application, so as to solve the problems in the prior art that water-soluble fertilizers have poor promoting effect on crop root growth, resulting in low nutrient absorption efficiency, and existing fertilizer products are prone to cause premature aging of crops.

[0007] To achieve the above objectives, the present invention provides a water-soluble fertilizer, which comprises, by weight, 75 to 99 parts of yeast metabolites, 0.2 to 12 parts of yeast glycosides, and 0.3 to 7 parts of alginic acid enrichment; wherein the yeast metabolites include soluble organic matter, yeast-derived biochemical fulvic acid, soluble added elements, free amino acids, and organic acids; and the yeast glycosides include nucleic acids, mannans, and small peptides.

[0008] Furthermore, the water-soluble fertilizer includes, by weight, 97.5 to 98.5 parts of yeast metabolites, 0.2 to 0.5 parts of yeast glycosides, and 0.3 to 0.8 parts of alginic acid-rich materials.

[0009] Furthermore, the solid content of the yeast metabolites is 40-55 wt%.

[0010] Furthermore, the yeast metabolites comprise, by weight, 15 to 30 parts of soluble organic matter, 19 to 25 parts of yeast-derived biochemical fulvic acid, 1 to 2.4 parts of soluble additive elements, 1.8 to 3.5 parts of free amino acids, and 1 to 3 parts of organic acid; preferably, the soluble additive elements are selected from one or more of the group consisting of macroelements, secondary elements, and trace elements; more preferably, they are one or more of the group consisting of N, P, K, Ca, Mg, S, Fe, Mn, Zn, and Cu; preferably, the organic acid is selected from one or more of the group consisting of malic acid, citric acid, succinic acid, and acetic acid; most preferably, by weight, the yeast metabolites comprise 15 to 16 parts of soluble organic matter, 24 to 25 parts of yeast-derived biochemical fulvic acid, 0.5 to 1 part of N element, 0.5 to 1 part of P element, 1.8 to 2 parts of free amino acids, and 1 to 1.5 parts of malic acid.

[0011] Furthermore, the nucleic acid content of the yeast glycoside is not less than 6 wt%, the mannan content is not less than 5 wt%, and the small peptide content is not less than 15 wt%, based on the total weight of the yeast glycoside. Preferably, the nucleic acid content of the yeast glycoside is 6-10 wt%, the mannan content is 5-20 wt%, and the small peptide content is 15-30 wt%, based on the total weight of the yeast glycoside. Preferably, the mannan has a weight-average molecular weight of 2,000-40,000 Daltons, the small peptide has a molecular weight of 200-400 Daltons, and the small peptide comprises amino acid units selected from one or more of the group consisting of glycine, leucine, and arginine. More preferably, the moisture content of the yeast glycoside does not exceed 7 wt%, based on the total weight of the yeast glycoside.

[0012] Furthermore, the alginic acid-rich material is selected from one or more of the group consisting of algin, alginate and algin; preferably, when the alginic acid-rich material is algin, the alginic acid content therein is not less than 10 wt%.

[0013] Furthermore, the water-soluble fertilizer further comprises 0.5 to 6 parts of a dispersing aid in parts by weight; preferably, the dispersing aid is selected from one or more of the group consisting of attapulgite, xanthan gum and organic bentonite; more preferably, when the dispersing aid is attapulgite, the D70 value of the attapulgite is 37 to 74 μm.

[0014] Furthermore, the content of water-insoluble matter in the water-soluble fertilizer does not exceed 0.5 wt % as a percentage of the total weight of the water-soluble fertilizer.

[0015] In order to achieve the above-mentioned objectives, another aspect of the present invention further provides a method for preparing the above-mentioned water-soluble fertilizer provided in this application, and the preparation method of the water-soluble fertilizer comprises: mixing yeast metabolites, yeast glycosides and alginic acid-rich materials to obtain a mixed material; and stirring and homogenizing the mixed material to obtain a water-soluble fertilizer.

[0016] Furthermore, the preparation method of the water-soluble fertilizer further comprises: mixing the mixed material with a dispersing aid; preferably, the stirring time is 60 to 90 minutes, the rotation speed is 35 to 50 rpm, and the homogenization time is 12 to 18 hours.

[0017] Another aspect of the present invention provides an application of the water-soluble fertilizer provided herein, or the water-soluble fertilizer prepared by the preparation method of the water-soluble fertilizer provided herein, in crop planting; preferably, the crops are selected from pakchoy, cucumber or corn.

[0018] Applying the technical solutions of the present invention, yeast metabolites can promote taproot growth, yeast glycosides can promote lateral root growth, and alginic acid-rich substances can promote root hair growth. Applying these specific dosages and types of water-soluble fertilizers to crop cultivation can, on the one hand, replenish the soluble additive elements required for crop growth, supplement soil organic matter, and enhance soil water and fertilizer retention and air permeability. On the other hand, it can promote the growth of taproots, lateral roots, and root hairs, thereby increasing root mass and enhancing the crop's absorption and utilization of nutrients, thereby increasing crop yield.

[0019] Compared with exogenously added hormones or chemically synthesized plant growth regulators, the water-soluble fertilizer provided in this application contains natural nutrients and will not cause premature aging of crops, thereby making the cultivated crops greener and healthier. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A photo of the roots of Chinese cabbage grown in Example 1 of the present application is shown;

[0022] Figure 2 A photo of the roots of Chinese cabbage grown in Comparative Example 1 of the present application is shown;

[0023] Figure 3 Shown is a photo of the roots of Chinese cabbage grown in Comparative Example 2 of the present application. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the embodiments.

[0025] As described in the background art, existing water-soluble fertilizers have a poor effect on promoting crop root growth, resulting in low nutrient absorption efficiency, and existing fertilizer products are prone to causing premature aging of crops. To address the above technical problems, the present application provides a water-soluble fertilizer, which comprises, by weight, 75 to 99 parts of yeast metabolites, 0.2 to 12 parts of yeast glycosides, and 0.3 to 7 parts of alginic acid-rich materials; wherein the yeast metabolites include soluble organic matter, yeast-derived biochemical fulvic acid, soluble additive elements, free amino acids, and organic acids; and the yeast glycosides include nucleic acids, mannans, and small peptides.

[0026] In the prior art, yeast fermentation products are applied to aquaculture technology, such as as pond water quality regulators. However, there is currently no application of yeast fermentation products in the field of crop planting, and in particular, there is no literature reporting on the effect of yeast fermentation products on the growth of plant roots. Moreover, the inventors have found through extensive research that when yeast metabolites are used alone in crop (such as pakchoy, cucumber, corn, etc.) planting fields, there are still problems such as slow crop root growth, small quantity, and low nutrient absorption and utilization rate. More importantly, the inventors have found through a large number of creative experiments and studies that compounding a specific amount of yeast metabolites with yeast glycosides and alginic acid-rich materials and applying them to crop planting can achieve unexpected results, effectively promote root growth, and adopt the technical solution provided by the present application to effectively play the synergistic effect of yeast metabolites, yeast glycosides, and alginic acid-rich materials, thereby increasing crop yields.

[0027] Applying the technical solutions of the present invention, yeast metabolites can promote taproot growth, yeast glycosides can promote lateral root growth, and alginic acid-rich substances can promote root hair growth. Applying these specific dosages and types of water-soluble fertilizers to crop cultivation can, on the one hand, replenish the soluble additive elements required for crop growth, supplement soil organic matter, and enhance soil water and fertilizer retention and air permeability. On the other hand, it can promote the growth of taproots, lateral roots, and root hairs, thereby increasing root mass and enhancing the crop's absorption and utilization of nutrients, thereby increasing crop yield.

[0028] Compared with exogenously added hormones or chemically synthesized plant growth regulators, the water-soluble fertilizer provided in this application contains natural nutrients and will not cause premature aging of crops, thereby making the cultivated crops greener and healthier.

[0029] In a preferred embodiment, the water-soluble fertilizer comprises, by weight, 97.5-98.5 parts of yeast metabolites, 0.2-0.5 parts of yeast glycosides, and 0.3-0.8 parts of alginic acid-enriched materials. The dosage ratios of yeast metabolites, yeast glycosides, and alginic acid-enriched materials include, but are not limited to, the aforementioned ranges. These ranges promote the growth of crop taproots, lateral roots, and root hairs, thereby increasing root mass and enhancing nutrient absorption and utilization by crops, thereby increasing crop yield. Furthermore, these ranges enhance soil water and nutrient retention and air permeability.

[0030] In a preferred embodiment, the yeast metabolite has a solid content of 40 to 55 wt %. The solid content of the yeast metabolite includes, but is not limited to, the aforementioned range. Limiting the solid content of the yeast metabolite to this range helps provide an appropriate amount of nutrients to crops, thereby promoting the growth of the crop's taproot, lateral roots, and root hairs. It also helps increase the solubility of other materials, thereby more easily forming a water-soluble fertilizer.

[0031] In a preferred embodiment, the yeast metabolite comprises, by weight, 15-30 parts soluble organic matter, 19-25 parts yeast-derived biochemical fulvic acid, 1-2.4 parts soluble additive elements, 1.8-3.5 parts free amino acids, and 1-3 parts organic acid. The amounts of the aforementioned nutrients in the yeast metabolite include, but are not limited to, the aforementioned ranges. Limiting these amounts to the aforementioned ranges facilitates synergistic effects among the nutrients, promotes taproot growth, and ultimately enhances nutrient absorption by the crop.

[0032] Macroelements, trace elements, and microelements are well known to those skilled in the art and are defined based on the nutritional requirements of plants. To promote crop growth and provide the beneficial elements necessary for crop growth, the soluble additive elements preferably include, but are not limited to, one or more of the group consisting of macroelements, trace elements, and microelements; more preferably, one or more of the group consisting of N, P, K, Ca, Mg, S, Fe, Mn, Zn, and Cu.

[0033] In order to promote crop growth and provide a favorable soil environment for crop growth, preferably, the organic acid includes but is not limited to one or more of the group consisting of malic acid, citric acid, succinic acid and acetic acid.

[0034] In a preferred embodiment, yeast metabolites include, by weight, 15-16 parts soluble organic matter, 24-25 parts yeast-derived biochemical fulvic acid, 0.5-1 part nitrogen, 0.5-1 part phosphorus, 1.8-2 parts free amino acids, and 1-2 parts malic acid. Compared to other ranges, limiting the content of each nutrient in yeast metabolites to this range facilitates further synergistic effects among the nutrients, promotes taproot growth, and thus enhances nutrient absorption by the crop.

[0035] In a preferred embodiment, the nucleic acid content of the yeast glycoside is no less than 6% by weight, the mannan content is no less than 5% by weight, and the small peptide content is no less than 15% by weight, based on the total weight of the yeast glycoside. The nucleic acid, mannan, and small peptide contents of the yeast glycoside include, but are not limited to, the aforementioned ranges. Limiting these contents to within the aforementioned ranges further promotes root hair growth, thereby further enhancing nutrient absorption by crops and thereby increasing crop yield.

[0036] In order to further promote the growth of crop root hairs, further enhance the absorption and utilization rate of nutrients, and thus further increase crop yields, preferably, the content of nucleic acid in yeast glycoside is 6-10wt%, the content of mannan is 5-20wt%, and the content of small peptide is 15-30wt%, calculated as a percentage of the total weight of yeast glycoside.

[0037] In a preferred embodiment, the weight-average molecular weight of mannan is 2,000 to 40,000 Daltons, and the molecular weight of the small peptide is 200 to 400 Daltons. Limiting the molecular weights of mannan and small peptide to the above ranges facilitates their absorption and utilization by crop roots, improving their absorption efficiency and thereby promoting root hair growth.

[0038] In a preferred embodiment, the small peptide comprises amino acid units, including but not limited to one or more of the group consisting of glycine, leucine, and arginine. Compared to other types of amino acid units, the use of these types is more targeted, facilitating crop absorption and utilization, while also enhancing crop root growth and development, and improving crop photosynthesis efficiency.

[0039] In a preferred embodiment, the moisture content of the yeast glycoside, measured as a percentage of the total weight of the yeast glycoside, does not exceed 7 wt %. Limiting the moisture content of the yeast glycoside to this range, compared to other ranges, improves the solubility of nucleic acids, mannans, and small peptides, facilitating the formation of a water-soluble fertilizer, thereby facilitating irrigation operations.

[0040] In a preferred embodiment, the alginic acid-rich material includes, but is not limited to, one or more of the group consisting of seaweed extract, alginate, and algin. Compared to other types, the alginic acid-rich materials described above have a higher alginic acid content, which helps reduce the amount of water-soluble fertilizer used, thereby reducing the cost of use.

[0041] In order to further reduce the usage of water-soluble fertilizers and improve the compatibility of the alginic acid-rich material with other components in the water-soluble fertilizer, preferably, when the alginic acid-rich material is seaweed essence, the alginic acid content therein is not less than 10 wt%.

[0042] The introduction of a dispersant can improve the storage stability of water-soluble fertilizers, making them less susceptible to precipitation and crystallization. In a preferred embodiment, the water-soluble fertilizer also includes 0.5 to 6 parts by weight of a dispersant. The amount of the dispersant used includes, but is not limited to, the aforementioned range. Limiting it to this range helps improve the storage stability of the water-soluble fertilizer, thereby facilitating subsequent irrigation operations.

[0043] In order to further improve the storage stability of the water-soluble fertilizer and further facilitate irrigation operations, preferably, the dispersing aid includes but is not limited to one or more of the group consisting of attapulgite, xanthan gum and organic bentonite.

[0044] In order to further improve the storage stability of the water-soluble fertilizer and further facilitate irrigation operations, more preferably, when the dispersing aid is attapulgite, the D70 value of the attapulgite is 37-74 μm.

[0045] During irrigation operations, water-insoluble matter in water-soluble fertilizers can easily clog irrigation equipment, hindering its lifespan. In a preferred embodiment, the water-insoluble matter content of the water-soluble fertilizer does not exceed 0.5 wt % of the total weight of the water-soluble fertilizer. Limiting the water-insoluble matter content to this range, compared to other ranges, helps extend the lifespan of irrigation equipment and facilitates irrigation operations.

[0046] The second aspect of the present application also provides a method for preparing a water-soluble fertilizer, which comprises: mixing yeast metabolites, yeast glycosides and alginic acid-rich materials to obtain a mixed material; and stirring and homogenizing the mixed material to obtain a water-soluble fertilizer.

[0047] Yeast metabolites, yeast glycosides, and an alginic acid-rich material are mixed to produce a mixture. Stirring the mixture evenly mixes the components, and homogenizing it reduces the size of large particles in the mixture, thereby producing a water-soluble fertilizer. This preparation method is simple to operate, has low process costs, and is suitable for large-scale production applications.

[0048] The introduction of the dispersing aid can improve the storage stability of the water-soluble fertilizer and make the nutrients in the water-soluble fertilizer evenly dispersed in the system. In a preferred embodiment, the preparation method of the water-soluble fertilizer further includes: mixing the mixed material with the dispersing aid.

[0049] In order to improve the dispersion uniformity of the components in the mixed material and further reduce the particle size of large-sized particles in the mixed material, preferably, the stirring time is 60 to 90 minutes, the rotation speed is 35 to 50 rpm, and the homogenization time is 12 to 18 hours.

[0050] A third aspect of the present application also provides a method for preparing a yeast metabolite, comprising: fermenting yeast using a culture medium containing molasses to obtain a fermentation nutrient solution; and concentrating the fermentation nutrient solution through multi-effect evaporation to obtain the yeast metabolite. The yeast metabolite preparation method is simple and produces a high-purity product.

[0051] The molasses used in this application can be selected from commonly used types in the art. In a preferred embodiment, the molasses includes but is not limited to sugarcane extract and / or beet extract.

[0052] In a preferred embodiment, the fermentation process has a pH of 5-6, a fermentation temperature of 25-30°C, and a fermentation time of 15-18 hours. Compared to other ranges, limiting the pH, temperature, and time during the fermentation process within these ranges facilitates controlling the fermentation reaction process, resulting in the resulting yeast metabolites containing specific amounts of soluble organic matter, yeast-derived biochemical fulvic acid, soluble additive elements, free amino acids, and organic acids, thereby facilitating their application in crop cultivation.

[0053] Compared to single-effect evaporation and concentration, multi-effect evaporation and concentration can significantly improve the purity of the target product and enhance purification efficiency. In a preferred embodiment, the evaporation temperature, evaporation time, and evaporation effect number of the multi-effect evaporation and concentration process are within, but not limited to, the above ranges, and limiting them to the above ranges is beneficial to improving the purity of the target product.

[0054] A fourth aspect of the present application further provides the use of the water-soluble fertilizer, or the water-soluble fertilizer produced by the method for preparing the water-soluble fertilizer, in crop cultivation. The water-soluble fertilizer provided herein is particularly suitable for root growth of the following crops, preferably including but not limited to pakchoi, cucumber, or corn.

[0055] The application of the water-soluble fertilizers of the specific dosage and type described above in this application to crop cultivation can, on the one hand, supplement the soluble additive elements required for crop growth, replenish soil organic matter, and enhance soil water and fertilizer retention and air permeability; on the other hand, it can promote the growth of crop taproots, lateral roots, and root hairs, thereby increasing the number of roots and enhancing the crop's absorption and utilization of nutrients, thereby increasing crop yields. In addition, compared to exogenously added hormones or chemically synthesized plant growth regulators, the water-soluble fertilizers provided in this application contain natural nutrients and will not cause premature aging of crops, thereby making the cultivated crops greener and healthier.

[0056] The present application is further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in this application.

[0057] Example 1

[0058] A water-soluble fertilizer comprises, by weight, 98.5 parts of yeast metabolites, 0.5 parts of yeast glycosides, 0.6 parts of seaweed extract, and 0.5 parts of attapulgite powder, as shown in Table 1.

[0059] Among them, by weight, the yeast metabolite includes 20 parts of soluble organic matter, 24 parts of yeast-derived biochemical fulvic acid, 1.5 parts of soluble added elements (including N element, P element and K element), 2 parts of free amino acids and 1.5 parts of malic acid; the solid content of the yeast metabolite is 50wt%; as a percentage of the total weight of yeast glycosides, the nucleic acid content in the yeast glycosides is 10wt%, the mannan content is 15wt%, the small peptide content is 25wt%, and the moisture content is 2wt%; the molecular weight of the above-mentioned mannan is 2000 Daltons; the molecular weight of the small peptide is 305 Daltons, and the small peptide includes an amino acid unit, which is composed of leucine and arginine; as a percentage of the total weight of seaweed essence, the content of alginic acid in the seaweed essence is 20wt%; the D70 value of the above-mentioned attapulgite powder is 200 mesh.

[0060] A method for preparing yeast metabolites, comprising:

[0061] Yeast is fermented using a culture medium containing molasses to obtain a fermentation nutrient solution; the fermentation nutrient solution is subjected to a six-effect evaporation concentration process to obtain the yeast metabolite used as the water-soluble fertilizer in Example 1.

[0062] The pH value of the fermentation treatment is 6.5, the fermentation temperature is 25° C., and the fermentation time is 20 h; the evaporation temperature of the six-effect evaporation concentration treatment is 110° C., and the evaporation time is 10 h.

[0063] A method for preparing a water-soluble fertilizer comprises:

[0064] Yeast metabolites, yeast glycosides, algae extract, and attapulgite powder are weighed according to the above-mentioned weight proportions and set aside for later use. The yeast metabolites, yeast glycosides, and algae extract are added to a stirring tank and mixed, stirring for 30 minutes. The attapulgite powder is then added and stirred for 12 hours to obtain a mixture. The mixture is filtered in a filtration tank to obtain a filtrate and water-insoluble matter. The filtrate is packaged to obtain a water-soluble fertilizer product. The water-soluble fertilizer product contains 0.5 wt% of water-insoluble matter.

[0065] Example 2

[0066] The yeast metabolite was prepared in the same manner as in Example 1, and the contents of the components in the resulting yeast metabolite were the same as in Example 1. The difference from Example 1 was that the water-soluble fertilizer included 98.5 parts of yeast metabolite, 0.5 parts of yeast glycosides, 0.8 parts of seaweed extract, and 0.7 parts of attapulgite powder, as detailed in Table 1. The water-soluble fertilizer was prepared in the same manner as in Example 1.

[0067] Example 3

[0068] The yeast metabolite was prepared in the same manner as in Example 1, and the contents of the components in the resulting yeast metabolite were the same as in Example 1. The difference from Example 1 was that the water-soluble fertilizer included 97.5 parts of yeast metabolite, 0.5 parts of yeast glycoside, 0.3 parts of seaweed extract, and 1.7 parts of attapulgite powder, as detailed in Table 1. The water-soluble fertilizer was prepared in the same manner as in Example 1.

[0069] Example 4

[0070] The yeast metabolite was prepared in the same manner as in Example 1, and the contents of the components in the resulting yeast metabolite were the same as in Example 1. The difference from Example 1 was that the proportions of yeast metabolite, yeast glycosides, seaweed extract, and attapulgite powder in the water-soluble fertilizer were different, with the total weight being 100 parts, as detailed in Table 1. The water-soluble fertilizer was prepared in the same manner as in Example 1.

[0071] Example 5

[0072] The yeast metabolite was prepared in the same manner as in Example 1, and the contents of the components in the resulting yeast metabolite were the same as in Example 1. The difference from Example 1 was that the proportions of yeast metabolite, yeast glycosides, seaweed extract, and attapulgite powder in the water-soluble fertilizer were different, with the total weight being 100 parts, as detailed in Table 1. The water-soluble fertilizer was prepared in the same manner as in Example 1.

[0073] It should be noted that the amounts in Table 1 are all expressed in parts by weight.

[0074] Table 1

[0075]

[0076]

[0077] Example 6

[0078] The difference from Example 1 is that the contents of the components in the yeast metabolites are different from those in Example 1, as shown in Table 2. The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0079] Example 7

[0080] The difference from Example 1 is that the contents of the components in the yeast metabolites are different from those in Example 1, as shown in Table 2. The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0081] It should be noted that the amounts in Table 2 are all expressed in parts by weight.

[0082] Example 8

[0083] The difference from Example 1 is that the contents of the components in the yeast metabolites are different from those in Example 1, as shown in Table 2. The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0084] Table 2

[0085] Soluble organic matter Yeast-derived biochemical fulvic acid Soluble added elements Free amino acids organic acids Example 1 20 24 1.5 2 1.5 Example 2 20 24 1.5 2 1.5 Example 3 20 24 1.5 2 1.5 Example 4 20 24 1.5 2 1.5 Example 5 20 24 1.5 2 1.5 Example 6 15 25 1 1.8 1 Example 7 30 19 2.4 3.5 3 Example 8 35 18 3 4 3.5

[0086] Example 9

[0087] The yeast metabolite was prepared in the same manner as in Example 1, and the contents of the components in the resulting yeast metabolite were the same as in Example 1. The difference from Example 1 was that, based on the total weight of the yeast glycosides, the nucleic acid content in the yeast glycosides was 6 wt %, the mannan content was 5 wt %, and the small peptide content was 15 wt %.

[0088] The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0089] Example 10

[0090] The preparation method of the yeast metabolite was the same as that in Example 1, and the contents of the components in the prepared yeast metabolite were the same as those in Example 1. The difference from Example 1 was that, based on the total weight of the yeast glycosides, the nucleic acid content in the yeast glycosides was 10 wt %, the mannan content was 20 wt %, and the small peptide content was 30 wt %.

[0091] The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0092] Example 11

[0093] The yeast metabolite was prepared in the same manner as in Example 1, and the contents of the components in the resulting yeast metabolite were the same as in Example 1. The difference from Example 1 was that, based on the total weight of the yeast glycosides, the nucleic acid content in the yeast glycosides was 12 wt %, the mannan content was 25 wt %, and the small peptide content was 40 wt %.

[0094] The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0095] Example 12

[0096] The preparation method of the yeast metabolite is the same as that of Example 1, and the contents of the components in the prepared yeast metabolite are the same as those in Example 1. The difference from Example 1 is that the content of alginic acid in the seaweed essence is 10 wt%.

[0097] The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0098] Example 13

[0099] The preparation method of the yeast metabolite is the same as that of Example 1, and the contents of the components in the prepared yeast metabolite are the same as those in Example 1. The difference from Example 1 is that the content of alginic acid in the seaweed essence is 5 wt%.

[0100] The preparation method of the water-soluble fertilizer is the same as that in Example 1.

[0101] Comparative Example 1

[0102] The difference from Example 1 is that the water-soluble fertilizer does not contain any nutrients and is pure water.

[0103] Comparative Example 2

[0104] The difference from Example 1 is that the water-soluble fertilizer only contains yeast metabolites.

[0105] Comparative Example 3

[0106] The difference from Example 1 is that a commercially available liquid fertilizer (organic water-soluble fertilizer produced by Beidelo, Genduowang) is used as the water-soluble fertilizer in this comparative example.

[0107] Comparative Example 4

[0108] The difference from Example 1 is that the water-soluble fertilizer contains only yeast metabolites and seaweed extract, and the usage ratio of the two is the same as that in Example 1, with a total weight of 100 parts.

[0109] Comparative Example 5

[0110] The difference from Example 1 is that the water-soluble fertilizer contains only yeast glycoside and seaweed extract, and the usage ratio of the two is the same as that in Example 1, with a total weight of 100 parts.

[0111] Comparative Example 6

[0112] The difference from Example 1 is that, based on weight, the water-soluble fertilizer includes 70 parts of yeast metabolites, 20 parts of yeast glycosides and 10 parts of alginic acid-rich materials, with a total weight of 100 parts.

[0113] The water-soluble fertilizer products prepared in all the above embodiments and comparative examples were tested and compared with the product standard of Type I in Q / AQJM 2129-2021 organic water-soluble fertilizer.

[0114] Table 3

[0115]

[0116] The water-soluble fertilizer products prepared in all of the above examples and comparative examples were tested for their performance, specifically in potted pakchoy plants. Root growth was observed using water, yeast metabolites, the water-soluble fertilizers prepared in each of the above examples, and commercially available liquid fertilizers as culture media. The results are reported in Table 4.

[0117] The water-soluble fertilizers prepared in Examples 1 to 13 were diluted 800-fold with water to obtain pakchoi culture solutions 1 to 13. The germinated pakchoi were transplanted and cultivated using the water in Comparative Example 1, the yeast metabolites in Comparative Example 2, the commercially available liquid fertilizers in Comparative Example 3, and pakchoi culture solutions 1 to 13. The root growth and aboveground growth of the pakchoi were observed every 5 days, and the pakchoi culture solution was replaced accordingly for a total of 20 days.

[0118] like Figure 1 、 Figure 2 and Figure 3 As shown, from the actual photos of the roots of the Chinese cabbage cultivated in Example 1, Comparative Example 1 and Comparative Example 2, it can be seen that the roots of the Chinese cabbage cultivated in Example 1 are longer and the growth of the above-ground part is also significantly better than that of Comparative Examples 1 and 2.

[0119] Table 4

[0120] Average length of taproot (cm) Average root weight (g) Example 1 6.92 0.271 Example 2 7.05 0.282 Example 3 6.88 0.267 Example 4 6.89 0.269 Example 5 6.93 0.273 Example 6 6.98 0.278 Example 7 7.01 0.280 Example 8 6.81 0.266 Example 9 7.38 0.318 Example 10 7.41 0.324 Example 11 6.85 0.269 Example 12 6.95 0.276 Example 13 6.89 0.268 Comparative Example 1 6.12 0.241 Comparative Example 2 6.73 0.264 Comparative Example 3 6.5 0.256 Comparative Example 4 5.27 0.263 Comparative Example 5 4.92 0.209 Comparative Example 6 4.39 0.186

[0121] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0122] By comparing Example 1 and Comparative Examples 1 to 6, it can be seen that the application of water-soluble fertilizers with specific dosages and types of the present application to crop planting can, on the one hand, supplement the soluble additive elements required for crop growth, supplement soil organic matter, and enhance soil water retention, fertilizer retention and air permeability; on the other hand, it can promote the growth of crop taproots, lateral roots and root hairs, thereby increasing the number of roots, enhancing the absorption and utilization rate of nutrients by crops, and thus increasing crop yields.

[0123] By comparing Examples 1 to 3 and Comparative Example 6, it can be seen that the dosage ratio of yeast metabolites, yeast glycosides and alginate-rich substances includes but is not limited to the preferred range of the present application. Limiting them within the preferred range of the present application is beneficial to promoting the growth of crop taproots, lateral roots and root hairs, thereby increasing the number of roots, enhancing the absorption and utilization rate of nutrients by crops, and thus increasing crop yields; at the same time, it is also beneficial to enhancing soil water retention, fertilizer retention and air permeability.

[0124] Comparing Examples 1, 6 to 8, it can be seen that the dosage of each nutrient component in the yeast metabolite includes but is not limited to the preferred range of the present application. Limiting it to the preferred range of the present application is conducive to the synergistic effect between the various nutrients, which is conducive to the growth of the taproot, and further conducive to enhancing the absorption of nutrients by crops.

[0125] By comparing Examples 1, 9 to 11, it can be seen that the contents of nucleic acids, mannans and small peptides in yeast glycosides include but are not limited to the preferred range of this application. Limiting them within the preferred range of this application is beneficial to further exerting the growth-promoting effect on root hairs, thereby further enhancing the absorption of nutrients by crops, thereby further increasing crop yields.

[0126] Comparing Examples 1, 12, and 13, it can be seen that the content of alginic acid in the seaweed essence includes but is not limited to the preferred range of the present application. Limiting it to the preferred range of the present application is beneficial to further reduce the amount of water-soluble fertilizer used and improve the compatibility of the alginic acid-rich substance with other ingredients in the water-soluble fertilizer.

[0127] It should be noted that the terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the application described herein can, for example, be implemented in an order other than that described herein.

[0128] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A water-soluble fertilizer, characterized in that: The water-soluble fertilizer comprises 75-99 parts of yeast metabolites, 0.2-12 parts of yeast glycosides and 0.3-7 parts of alginate-rich substances by weight; wherein the solid content of the yeast metabolites is 40-55wt%; the yeast metabolites comprise 15-30 parts of soluble organic matter, 19-25 parts of yeast-derived biochemical fulvic acid, 1-2.4 parts of soluble additive elements, 1.8-3.5 parts of free amino acids and 1-3 parts of organic acids by weight; the soluble additive elements are selected from one or more of macroelements, secondary elements and trace elements; the yeast glycosides comprise nucleic acids, mannans and small peptides; the alginate-rich substances are selected from one or more of seaweed essence, alginate and algae extract.

2. The water-soluble fertilizer according to claim 1, characterized in that The water-soluble fertilizer comprises 97.5 to 98.5 parts of the yeast metabolites, 0.2 to 0.5 parts of the yeast glycosides and 0.3 to 0.8 parts of the alginic acid-rich material by weight.

3. The water-soluble fertilizer according to claim 1 or 2, characterized in that: The soluble additive element is selected from one or more of N, P, K, Ca, Mg, S, Fe, Mn, Zn and Cu elements; The organic acid is selected from one or more of malic acid, citric acid, succinic acid and acetic acid.

4. The water-soluble fertilizer according to claim 3, characterized in that In parts by weight, the yeast metabolites include 15 to 16 parts of the soluble organic matter, 24 to 25 parts of the yeast-derived biochemical fulvic acid, 0.5 to 1 part of N element, 0.5 to 1 part of P element, 1.8 to 2 parts of the free amino acids and 1 to 1.5 parts of the malic acid.

5. The water-soluble fertilizer according to claim 3, characterized in that: Calculated as a percentage of the total weight of the yeast glycoside, the content of the nucleic acid in the yeast glycoside is not less than 6wt%, the content of the mannan is not less than 5wt%, and the content of the small peptide is not less than 15wt%.

6. The water-soluble fertilizer according to claim 5, characterized in that Calculated by percentage of the total weight of the yeast glycoside, the content of the nucleic acid in the yeast glycoside is 6-10wt%, the content of the mannan is 5-20wt%, and the content of the small peptide is 15-30wt%; The weight average molecular weight of the mannan is 2000-40000 Daltons, the molecular weight of the small peptide is 200-400 Daltons, and the small peptide comprises an amino acid unit, and the amino acid unit is selected from one or more of glycine, leucine and arginine.

7. The water-soluble fertilizer according to claim 6, characterized in that The moisture content of the yeast glycoside is no more than 7wt% based on the total weight of the yeast glycoside.

8. The water-soluble fertilizer according to claim 1, characterized in that When the alginate-rich material is the seaweed essence, the alginate content therein is not less than 10wt%.

9. The water-soluble fertilizer according to claim 1, characterized in that: The water-soluble fertilizer further comprises 0.5 to 6 parts of a dispersing aid by weight; The dispersing aid is selected from one or more of attapulgite, xanthan gum and organic bentonite; When the dispersing aid is attapulgite, the D70 value of the attapulgite is 37 to 74 μm.

10. The water-soluble fertilizer according to any one of claims 5 to 9, characterized in that The content of water-insoluble matter in the water-soluble fertilizer does not exceed 0.5wt% as a percentage of the total weight of the water-soluble fertilizer.

11. A method for preparing the water-soluble fertilizer according to claim 1, characterized in that: The preparation method of the water-soluble fertilizer comprises: The yeast metabolites, yeast glycosides and alginic acid-rich materials are mixed to obtain a mixed material; The mixed material is stirred and homogenized to obtain a water-soluble fertilizer.

12. The method for preparing a water-soluble fertilizer according to claim 11, characterized in that: The method for preparing the water-soluble fertilizer further comprises: mixing the mixed material with a dispersing aid.

13. The method for preparing a water-soluble fertilizer according to claim 12, characterized in that: The stirring treatment time is 60 to 90 minutes, the rotation speed is 35 to 50 rpm, and the homogenization treatment time is 12 to 18 hours.

14. Use of the water-soluble fertilizer according to claim 1 or the water-soluble fertilizer prepared by the preparation method of the water-soluble fertilizer according to claim 11 in crop planting.

15. Application of the preparation method of the water-soluble fertilizer according to claim 14 in crop planting, characterized in that: The crops are selected from Chinese cabbage, cucumber or corn.

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