Bacteriostatic slow-release water-saving hole storage ball based on industrial hemp stalks and preparation method of bacteriostatic slow-release water-saving hole storage ball

Abstract

The invention discloses a bacteriostatic slow-release water-saving type hole storage ball based on industrial hemp stalks and a preparation method thereof.The hole storage ball is prepared from, by mass, 5-10 parts of industrial hemp stalk powder, 30-50 parts of montmorillonite powder, 2-10 parts of activated carbon, 5-10 parts of a water-retaining agent, 5-20 parts of a water-soluble nitrogen-phosphorus-potassium compound fertilizer and 20-40 parts of water; the montmorillonite powder, the activated carbon and the water-soluble nitrogen-phosphorus-potassium compound fertilizer are premixed and then secondarily mixed with the industrial hemp stalk powder and the water-retaining agent, and granulation molding is performed to prepare the hole storage ball. According to the invention, antibacterial substances such as cannabinol naturally contained in the waste industrial hemp stalks are fully utilized, so that the fertilizer block is endowed with an internal plant health-care function, the hole storage ball effectively inhibits soil-borne pathogenic bacteria such as fusarium and rhizoctonia solani, the phenomena of root rot and seedling death of crops are reduced, the use of chemical pesticides is reduced, and the production cost is reduced. The problems of crop water retention, bacteriostasis and soil improvement can be solved simultaneously, waste is turned into wealth, and the method is suitable for popularization and application.

Description

Technical Field

[0001] This invention relates to the fields of agricultural technology and solid fertilizers, and in particular to a type of antibacterial, slow-release, water-saving pitted storage pellet based on industrial hemp stems and its preparation method. Background Technology

[0002] Currently, in arid and semi-arid regions, such as Xinjiang, China, agricultural production faces the severe challenge of water scarcity. Conventional irrigation and fertilization methods (such as flood irrigation followed by broadcasting) not only have low water use efficiency, but also cause fertilizers to be easily lost or volatilized with water, resulting in resource waste and environmental pollution. In addition, soil-borne diseases caused by continuous cropping obstacles are becoming increasingly serious.

[0003] Currently, although various slow-release fertilizers and solid fertilizer bars / blocks are available, their functions are limited, primarily providing nutrients, and they cannot simultaneously address water retention, antibacterial properties, and soil improvement. On the other hand, the industrial hemp (such as hemp) industry generates a large amount of byproducts such as stems after the harvesting of fiber and seeds. Currently, these byproducts lack high-value-added utilization pathways, aside from small amounts of composting or disposal. Research indicates that industrial hemp stems contain natural antibacterial substances such as cannabinoids and terpenes, but their direct application in agriculture has not yet been effectively developed.

[0004] Therefore, there is an urgent need for an innovative agricultural technology product that can integrate multiple functions such as resource recycling, water conservation and drought resistance, slow release of nutrients and disease control. Summary of the Invention

[0005] The purpose of this invention is to provide a slow-release, water-saving, antibacterial storage pellet based on industrial hemp stems and its preparation method, in order to solve the problem that the existing technology lacks an effective means to simultaneously solve the problems of crop water retention, antibacterial activity and soil improvement, and to effectively utilize waste industrial hemp stems.

[0006] To solve the above-mentioned technical problems, the first solution provided by the present invention is a slow-release, water-saving, antibacterial storage ball based on industrial hemp stems, comprising the following raw materials by weight: 5-10 parts industrial hemp stem powder, 30-50 parts montmorillonite powder, 2-10 parts activated carbon, 5-10 parts water-retaining agent, 5-20 parts water-soluble nitrogen-phosphorus-potassium compound fertilizer, and 20-40 parts water; the montmorillonite powder, activated carbon, and water-soluble nitrogen-phosphorus-potassium compound fertilizer are premixed, then mixed again with the industrial hemp stem powder and water-retaining agent, and granulated to obtain the slow-release, water-saving, antibacterial storage ball based on industrial hemp stems.

[0007] In some embodiments, the antibacterial slow-release water-saving storage ball based on industrial hemp stems comprises, by weight, the following raw materials: 5 parts industrial hemp stem powder, 42 parts montmorillonite powder, 4 parts activated carbon, 8 parts water-retaining agent, 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer, and 33 parts water.

[0008] In some embodiments, the industrial hemp stalk powder is powdered industrial hemp stalks with an average particle size of 0.004 to 0.021 cm after being pulverized.

[0009] In some embodiments, the water-retaining agent includes at least one of polyacrylamide-type water-retaining agents and polyacrylate-type water-retaining agents.

[0010] In some embodiments, the water-soluble nitrogen, phosphorus, and potassium compound fertilizer includes at least one type of water-soluble compound fertilizer selected from 15-15-15, 20-20-20, 18-18-18, 30-10-10, 25-5-10, 28-6-6, 10-30-20, 15-30-15, 10-40-10, 10-10-30, 15-10-25, and 20-10-20.

[0011] To solve the above-mentioned technical problems, the second solution provided by the present invention is the preparation method of the antibacterial slow-release water-saving pitted storage ball based on industrial hemp stems in the aforementioned first solution. The preparation method includes the following steps: S1, to prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer, montmorillonite powder, activated carbon and water-soluble nitrogen, phosphorus and potassium compound fertilizer are premixed according to the ratio to obtain premix; S2, the premix is ​​mixed with industrial hemp stalk powder and water-retaining agent in a certain proportion to obtain a blend; S3, continuously spray water onto the blend and stir until the material clumps together, then press it into a spherical preform under a pressure of 20-50 MPa. S4, the spherical preform is dried to constant weight at 50-70℃ and then cooled to obtain antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems.

[0012] In some embodiments, in step S1, the premixing process conditions are: dry mixing speed of 300-600 rpm and dry mixing time of 10-20 min.

[0013] In some embodiments, the process conditions for secondary mixing in step S2 are: dry mixing speed of 50-150 rpm and dry mixing time of 15-30 min.

[0014] In the aforementioned first solution, antibacterial slow-release water-saving pit storage balls based on industrial hemp stems are used in the preparation of solid fertilizers. Specifically, 1 to 2 antibacterial slow-release water-saving pit storage balls based on industrial hemp stems are placed near the roots during crop transplanting or growth.

[0015] The beneficial effects of this invention are as follows: 1. Waste utilization and turning waste into treasure: For the first time, the stems, a by-product of industrial hemp processing, are used as the core functional matrix in the preparation of solid fertilizer, providing a brand-new value-added direction for the industrial hemp industry chain, which meets the requirements of circular agriculture and green development.

[0016] 2. Active antibacterial and disease control: Utilizing the naturally occurring antibacterial substances such as cannabinoids in industrial hemp stems, the fertilizer blocks possess inherent plant health benefits. When applied to the rhizosphere, it effectively inhibits soil-borne pathogens such as Fusarium and Rhizoctonia solani, reducing root rot and seedling death, and lowering the use of chemical pesticides.

[0017] 3. Triple slow-release for long-lasting fertilization: First, the water-soluble NPK compound fertilizer is adsorbed and fixed by montmorillonite and activated carbon, avoiding dissolution and loss during processing and rapid release after application. Second, the dense physical structure formed by high-pressure molding slowly disintegrates upon contact with water, slowing down the nutrient release rate. Third, the water-retaining agent preferentially absorbs water and swells upon contact with water, reducing the amount of water used to dissolve the fertilizer and further extending its effectiveness. These three slow-release mechanisms work synergistically to achieve a better match between nutrient release and crop needs, ensuring long-lasting fertilization for crops.

[0018] 4. Improves soil with multiple benefits: Industrial hemp stalk powder provides organic matter to improve soil aggregate structure, montmorillonite provides minerals and enhances cation exchange capacity, and activated carbon adsorbs harmful substances in the soil to purify the rhizosphere environment. The three work together to improve the physical and chemical properties of the soil.

[0019] 5. Highly efficient water conservation and drought resistance: This invention is particularly suitable for arid regions such as Xinjiang. Its "hole storage" method concentrates water and nutrients in the crop root zone, greatly improving utilization efficiency; the water-retaining agent can absorb more than 100 times its own weight in water, continuously providing water to crops during irrigation breaks, effectively resisting drought stress, and solving the problem that conventional irrigation methods are difficult to implement in water-scarce areas.

[0020] 6. Convenient to use, labor-saving and labor-saving: Users only need to place 1-2 seed pellets near the roots during crop transplanting or growth period to meet the crop's multiple needs for water, fertilizer and pesticides for a longer period of time, greatly reducing the number of topdressing and irrigation and labor intensity. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having” and any variations thereof in the specification and claims of this invention are intended to cover non-exclusive inclusion.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the first solution provided by the present invention, the antibacterial slow-release water-saving pitted storage balls based on industrial hemp stems, by weight, comprise the following raw materials: 5-10 parts of industrial hemp stem powder, 30-50 parts of montmorillonite powder, 2-10 parts of activated carbon, 5-10 parts of water-retaining agent, 5-20 parts of water-soluble nitrogen-phosphorus-potassium compound fertilizer, and 20-40 parts of water; the montmorillonite powder, activated carbon, and water-soluble nitrogen-phosphorus-potassium compound fertilizer are premixed, then mixed again with the industrial hemp stem powder and water-retaining agent, and granulated to obtain the antibacterial slow-release water-saving pitted storage balls based on industrial hemp stems.

[0025] The mechanism of action of the antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems is as follows: 1) Fully utilize the antibacterial substances such as cannabinoids naturally contained in industrial hemp stems to endow fertilizer blocks with inherent plant health care functions. When applied to the rhizosphere, it can not only provide organic matter to improve soil aggregate structure, but also effectively inhibit soil-borne pathogens such as Fusarium and Rhizoctonia solani, reduce crop root rot and seedling death, and reduce the use of chemical pesticides.

[0026] 2) Firstly, the water-soluble NPK compound fertilizer is adsorbed and fixed by montmorillonite and activated carbon, avoiding dissolution and loss during processing and rapid release after application, thus constituting adsorption-based slow release. Secondly, the dense physical structure formed by high-pressure molding slowly disintegrates upon contact with water, slowing down the nutrient release rate, thus constituting structural slow release. Thirdly, the water-retaining agent preferentially absorbs water and swells upon contact with water, reducing the amount of water used to dissolve the fertilizer and further prolonging the fertilizer effect, thus constituting competitive water absorption-based slow release. The above three aspects of slow release work synergistically to achieve a better match between nutrient release and crop needs, ensuring long-term fertilization for crops.

[0027] 3) Industrial hemp stalk powder provides organic matter to improve soil aggregate structure, montmorillonite provides minerals and enhances cation exchange capacity, and activated carbon adsorbs harmful substances in the soil to purify the rhizosphere environment. The three work together to improve the physical and chemical properties of the soil.

[0028] In some embodiments, the antibacterial slow-release water-saving pitted storage balls based on industrial hemp stems preferably contain the following raw materials by weight: 5 parts industrial hemp stem powder, 42 parts montmorillonite powder, 4 parts activated carbon, 8 parts water-retaining agent, 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer, and 33 parts water.

[0029] In some embodiments, the industrial hemp stalk powder is powdered industrial hemp stalks with an average particle size of 0.004–0.021 cm after pulverization. If the particle size after pulverization is too fine, the powder itself will easily agglomerate and degrade too quickly, prematurely losing its supporting function for the internal structure of the storage pellets; if the particle size after pulverization is too large, it will lead to uneven mixing, easy stratification during mixing and subsequent processing, making the structure too loose, accelerating the ineffective loss of nutrients, and slow degradation.

[0030] In some embodiments, the water-retaining agent includes at least one of polyacrylamide-type water-retaining agents and polyacrylate-type water-retaining agents.

[0031] In some embodiments, the water-soluble nitrogen, phosphorus, and potassium compound fertilizer includes at least one type of water-soluble compound fertilizer selected from 15-15-15, 20-20-20, 18-18-18, 30-10-10, 25-5-10, 28-6-6, 10-30-20, 15-30-15, 10-40-10, 10-10-30, 15-10-25, and 20-10-20.

[0032] The second solution provided by this invention is the preparation method of antibacterial slow-release water-saving pitted storage balls based on industrial hemp stems, as described in the first solution above. This preparation method includes the following steps: S1, preparing water-soluble nitrogen, phosphorus, and potassium compound fertilizer: Montmorillonite powder, activated carbon, and water-soluble nitrogen, phosphorus, and potassium compound fertilizer are premixed according to the specified ratio to obtain a premix. In step S1, the premixing conditions are: dry mixing speed of 300–600 rpm and dry mixing time of 10–20 min. The purpose of premixing is to form a uniform "fertilizer-adsorbent" premix after high-speed dry mixing of montmorillonite powder, activated carbon, and water-soluble nitrogen, phosphorus, and potassium compound fertilizer, thereby preventing the dissolution of nitrogen-containing components (such as high-nitrogen fertilizer components like urea) in the water-soluble nitrogen, phosphorus, and potassium compound fertilizer during subsequent processing.

[0033] In step S2, the premixed material is mixed a second time with industrial hemp stem powder and a water-retaining agent according to the specified ratio to obtain a blend. The process conditions for this second mixing in step S2 are: dry mixing speed of 50–150 rpm and dry mixing time of 15–30 min. Furthermore, during the second mixing process, an appropriate amount of trace element fertilizer powder can be added according to actual needs to supplement the required trace elements; the specific selection of trace elements and their dosage are not limited.

[0034] In step S3, the blend is continuously sprayed with water and stirred until it clumps together. Then, it is pressed into spherical preforms under a pressure of 20–50 MPa. In step S3, the amount of water specified in the formula is slowly and evenly added to the blend obtained in step S2 using a spraying device, while continuously stirring. The amount of water added is such that the material can be formed into a ball when squeezed but crumbles when touched. The moist material is then fed into a briquetting machine and pressed into spherical preforms under a pressure of 20–50 MPa. The dense physical structure formed by high-pressure molding slowly disintegrates upon contact with water, thus slowing down the nutrient release rate.

[0035] S4, the spherical preform is dried to constant weight at 50-70℃ and then cooled to obtain antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems.

[0036] In the aforementioned first solution, antibacterial, slow-release, water-saving pitted fertilizer pellets based on industrial hemp stems are applied in solid fertilizer preparation. Specifically, 1-2 pellets are placed near the roots during crop transplanting or growth. Only a small number of pellets are needed to meet the crop's multiple needs for water, fertilizer, and pesticides for a relatively long period, significantly reducing the frequency of topdressing and irrigation, and labor intensity. The placement depth of the antibacterial, slow-release, water-saving pitted fertilizer pellets based on industrial hemp stems in this invention can be adaptively adjusted according to the size of the pellets to meet the needs of different crops; no limitation is made here.

[0037] The following specific examples demonstrate the application effect of the antibacterial, slow-release, water-saving pit-grown pellets based on industrial hemp stems in this invention through potted plant control experiments. The water-soluble nitrogen-phosphorus-potassium compound fertilizer used was a commercially available 30-10-10 high-nitrogen water-soluble compound fertilizer, and the water-retaining agent used was a commercially available polyacrylamide-type water-retaining agent.

[0038] I. Preparation Method The specific steps for preparing antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems in this embodiment are as follows: (1) Prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer. Premix montmorillonite powder, activated carbon and water-soluble nitrogen, phosphorus and potassium compound fertilizer according to the ratio. The specific ratio is 42 parts montmorillonite powder, 4 parts activated carbon and 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer. Dry mix at 500 rpm for 20 min to obtain the premix.

[0039] (2) The premixed material is mixed with industrial hemp stem powder and water-retaining agent in a certain ratio. Specifically, the ratio is 5 parts industrial hemp stem powder and 8 parts water-retaining agent. The mixture is dry-mixed at 100 rpm for 20 min to obtain the blend.

[0040] (3) Use a spray device to slowly and evenly add 33 parts by mass of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then send the wet material into a briquetting machine and press it into shape under a pressure of 25 MPa to obtain a spherical blank.

[0041] (4) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0042] Example 2 The specific steps for preparing antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems in this embodiment are as follows: (1) Prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer. Premix montmorillonite powder, activated carbon and water-soluble nitrogen, phosphorus and potassium compound fertilizer according to the ratio. The specific ratio is 50 parts montmorillonite powder, 10 parts activated carbon and 20 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer. Dry mix at 500 rpm for 20 min to obtain the premix.

[0043] (2) The premixed material is mixed with industrial hemp stem powder and water-retaining agent in a certain ratio. Specifically, the ratio is 10 parts industrial hemp stem powder and 10 parts water-retaining agent. The mixture is dry-mixed at 100 rpm for 20 min to obtain the blend.

[0044] (3) Use a spray device to slowly and evenly add 33 parts by mass of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then send the wet material into a briquetting machine and press it into shape under a pressure of 25 MPa to obtain a spherical blank.

[0045] (4) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0046] Example 3 The specific steps for preparing antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems in this embodiment are as follows: (1) Prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer. Premix montmorillonite powder, activated carbon and water-soluble nitrogen, phosphorus and potassium compound fertilizer according to the ratio. The specific ratio is 30 parts montmorillonite powder, 2 parts activated carbon and 5 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer. Dry mix at 500 rpm for 20 min to obtain the premix.

[0047] (2) The premixed material is mixed with industrial hemp stem powder and water-retaining agent in a certain ratio. Specifically, the ratio is 5 parts industrial hemp stem powder and 5 parts water-retaining agent. The mixture is dry-mixed at 100 rpm for 20 min to obtain the blend.

[0048] (3) Use a spray device to slowly and evenly add 33 parts by mass of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then send the wet material into a briquetting machine and press it into shape under a pressure of 25 MPa to obtain a spherical blank.

[0049] (4) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0050] Comparative Example 1 The specific steps for preparing the cavity reservoir in this comparative example are as follows: (1) To prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer, 5 parts of industrial hemp stem powder, 42 parts of montmorillonite powder, 4 parts of activated carbon, 8 parts of water-retaining agent and 8 parts of water-soluble nitrogen, phosphorus and potassium compound fertilizer were directly dry-mixed at 500 rpm for 20 min to obtain the blend.

[0051] (2) Use a spray device to slowly and evenly add 33 parts by mass of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then the wet material is fed into a briquetting machine and pressed into shape under a pressure of 25 MPa to obtain a spherical blank.

[0052] (3) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0053] Comparative Example 2 The specific steps for preparing the cavity reservoir in this comparative example are as follows: (1) Prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer. Premix montmorillonite powder and water-soluble nitrogen, phosphorus and potassium compound fertilizer according to the ratio of 47 parts montmorillonite powder and 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer. Dry mix at 500 rpm for 20 min to obtain premix.

[0054] (2) The premix and water-retaining agent are mixed twice according to the ratio of 8 parts water-retaining agent. The mixture is dry-mixed at 100 rpm for 20 min to obtain the blend.

[0055] (3) Use a spray device to slowly and evenly add 25 parts by weight of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then send the wet material into a briquetting machine and press it into shape under a pressure of 25 MPa to obtain a spherical blank.

[0056] (4) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0057] Comparative Example 3 The specific steps for preparing the cavity reservoir in this comparative example are as follows: (1) Prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer. Premix montmorillonite powder and water-soluble nitrogen, phosphorus and potassium compound fertilizer according to the ratio of 46 parts montmorillonite powder and 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer. Dry mix at 500 rpm for 20 min to obtain premix.

[0058] (2) The premixed material is mixed with industrial hemp stem powder and water-retaining agent in a certain ratio. Specifically, the ratio is 5 parts industrial hemp stem powder and 8 parts water-retaining agent. The mixture is dry-mixed at 100 rpm for 20 min to obtain the blend.

[0059] (3) Use a spray device to slowly and evenly add 33 parts by mass of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then send the wet material into a briquetting machine and press it into shape under a pressure of 25 MPa to obtain a spherical blank.

[0060] (4) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0061] Comparative Example 4 The specific steps for preparing the cavity reservoir in this comparative example are as follows: (1) Prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer. Premix montmorillonite powder, activated carbon and water-soluble nitrogen, phosphorus and potassium compound fertilizer according to the ratio. The specific ratio is 42 parts montmorillonite powder, 4 parts activated carbon and 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer. Dry mix at 500 rpm for 20 min to obtain the premix.

[0062] (2) The premixed material is mixed with industrial hemp stem powder and water-retaining agent in a certain ratio. Specifically, the ratio is 5 parts industrial hemp stem powder and 8 parts water-retaining agent. The mixture is dry-mixed at 100 rpm for 20 min to obtain the blend.

[0063] (3) Use a spray device to slowly and evenly add 25 parts by weight of water to the blend obtained above, while continuously stirring. The amount of water added should be such that the material can be "kneaded into a ball and then dispersed when touched". Then send the wet material into a briquetting machine and press it into shape under a pressure of 15 MPa to obtain a spherical blank.

[0064] (4) The spherical blanks were dried at 70°C to constant weight and then cooled to obtain antibacterial slow-release water-saving pitted pellets based on industrial hemp stems.

[0065] Comparative Example 5 This comparative study did not use seedlings in pits, but instead employed a conventional cultivation method involving the application of water-soluble nitrogen, phosphorus, and potassium compound fertilizer and water.

[0066] II. Potted Plant Experiment Pot experiments were conducted on the aforementioned embodiments and comparative examples. Pot cultivation was adopted, with 15 kg of soil placed in each pot. The soil was collected from the topsoil layer (0-20 cm) of farmland, air-dried, and sieved through a 10-mesh sieve. It was then mixed thoroughly for later use. Jinli 1702 corn seeds were selected. The specific cultivation and management steps are as follows: 1. Base fertilizer application: In the experimental group, the soil pellets or fertilizer were used as base fertilizer and applied to the 10 cm soil layer before sowing.

[0067] 2. Sowing and seedling raising: Before sowing, thoroughly water the soil in the pot to field capacity. Sow 20 corn seeds per pot at a depth of about 2-3 cm.

[0068] 3. Seedling transplanting: After sowing, place the seedlings under suitable conditions for cultivation. After about ten days, thin out the seedlings, transplanting 8 healthy seedlings of basically uniform growth into each pot.

[0069] 4. Water and fertilizer management: During the experiment, quantitative water management was adopted: starting from transplanting, water was applied once every 3 days, with each pot receiving 400 mL of water (or the soil moisture content was brought to 60% of field capacity). The irrigation system in the example was exactly the same as that in the comparative example.

[0070] 5. Data observation and collection: Biomass was measured and recorded on the 30th day after sowing.

[0071] III. Experimental Results and Analysis The irrigation frequency, biomass, and root disease incidence in the pot experiments of the aforementioned embodiments and comparative examples were statistically analyzed, and the results are shown in Table 1.

[0072] Table 1 Table 1 shows the data from the comparative experiment with potted plants: a) The only difference between Comparative Example 1 and Example 1 is that no premixing treatment was performed. Although there was no significant difference in the incidence of root diseases between the two, the lack of premixing treatment caused a certain amount of nitrogen-containing components in the water-soluble NPK compound fertilizer to dissolve, resulting in a reduction in biomass and hindering growth.

[0073] b) The only difference between Comparative Example 2 and Example 1 is the absence of industrial hemp stem powder component, which reduces biomass and significantly increases the incidence of root diseases. This demonstrates that industrial hemp stem powder component plays a crucial role in increasing biomass and improving the incidence of root diseases.

[0074] c) The only difference between Comparative Example 3 and Example 1 is the absence of activated carbon components, which reduces biomass and slightly increases the incidence of root diseases. This proves that activated carbon components can adsorb and fix water-soluble nitrogen, phosphorus and potassium compound fertilizer to increase biomass; at the same time, they adsorb harmful substances in the soil, thereby reducing the incidence of root diseases.

[0075] d) The only difference between Comparative Example 4 and Example 1 is that the pressure during molding is too low. Due to the low molding pressure, the storage pellets cannot form a dense structure, and the effective components retained by the storage pellets are easily lost, which leads to a significant reduction in biomass and a significant increase in the incidence of root diseases. Therefore, it is necessary to strictly control the molding pressure during the preparation of storage pellets in order to obtain the effects described in this invention.

[0076] e) Comparative Example 5 was a cultivation method using conventional application of water-soluble nitrogen, phosphorus, and potassium compound fertilizer and water. The comparison shows that, compared with conventional fertilizers with the same amount of nutrients, industrial hemp using the hole-storage pellets of the present invention showed a 50.9% increase in biomass and a reduction of more than 71.44% in root disease incidence under the condition of a relative soil moisture content of 60%, which fully demonstrates the synergistic effect of the present invention in water conservation, growth promotion and disease resistance.

[0077] It should be noted that all the above embodiments belong to the same inventive concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not detailed, please refer to the description in other embodiments.

[0078] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A type of antibacterial, slow-release, water-saving pitted storage pellet based on industrial hemp stems, characterized in that, The preparation materials include the following by mass: 5-10 parts industrial hemp stalk powder, 30-50 parts montmorillonite powder, 2-10 parts activated carbon, 5-10 parts water-retaining agent, 5-20 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer and 20-40 parts water. The montmorillonite powder, activated carbon, and water-soluble nitrogen, phosphorus, and potassium compound fertilizer are premixed, then mixed again with the industrial hemp stem powder and water-retaining agent, and granulated to obtain the antibacterial slow-release water-saving pitted storage ball based on industrial hemp stem.

2. The antibacterial, slow-release, water-saving pitted storage pellet based on industrial hemp stems according to claim 1, characterized in that, The preparation materials, by mass, include the following: 5 parts industrial hemp stalk powder, 42 parts montmorillonite powder, 4 parts activated carbon, 8 parts water-retaining agent, 8 parts water-soluble nitrogen, phosphorus and potassium compound fertilizer, and 33 parts water.

3. The antibacterial, slow-release, water-saving pitted storage pellet based on industrial hemp stems according to claim 1, characterized in that, The industrial hemp stalk powder is powdered industrial hemp stalks with an average particle size of 0.004 to 0.021 cm after being pulverized.

4. The antibacterial, slow-release, water-saving pitted storage pellet based on industrial hemp stems according to claim 1, characterized in that, The water-retaining agent includes at least one of polyacrylamide-type water-retaining agents and polyacrylate-type water-retaining agents.

5. The antibacterial, slow-release, water-saving pitted storage pellet based on industrial hemp stems according to claim 1, characterized in that, The water-soluble nitrogen, phosphorus, and potassium compound fertilizer includes at least one type of water-soluble compound fertilizer selected from 15-15-15, 20-20-20, 18-18-18, 30-10-10, 25-5-10, 28-6-6, 10-30-20, 15-30-15, 10-40-10, 10-10-30, 15-10-25, and 20-10-20.

6. A method for preparing antibacterial, slow-release, water-saving pitted storage pellets based on industrial hemp stems as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1, to prepare water-soluble nitrogen, phosphorus and potassium compound fertilizer, montmorillonite powder, activated carbon and water-soluble nitrogen, phosphorus and potassium compound fertilizer are premixed according to the ratio to obtain premix; S2, the premixed material is mixed with industrial hemp stem powder and water-retaining agent in a certain proportion to obtain a blend; S3, continuously spray water onto the blend and stir until the material clumps together, then press it into a spherical preform under a pressure of 20-50 MPa. S4. The spherical preform is dried to constant weight at 50-70°C and then cooled to obtain the antibacterial, slow-release, water-saving storage pellets based on industrial hemp stems.

7. The preparation method according to claim 6, characterized in that, In step S1, the premixing process conditions are: dry mixing speed of 300-600 rpm and dry mixing time of 10-20 min.

8. The preparation method according to claim 6, characterized in that, In step S2, the secondary mixing process conditions are: dry mixing speed of 50-150 rpm and dry mixing time of 15-30 min.

9. The application of antibacterial slow-release water-saving pitted storage balls based on industrial hemp stems as described in any one of claims 1 to 5 in the preparation of solid fertilizers.

10. The application according to claim 9, characterized in that, Place 1-2 of the aforementioned antibacterial, slow-release, water-saving storage balls based on industrial hemp stems near the roots during crop transplanting or growth period.

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