Special fertilizer for preventing durian fruit cracking and preparation method thereof
By preparing a special fertilizer for preventing durian fruit cracking containing mineral-derived potassium humate and other ingredients, soil structure is improved, cell wall toughness is enhanced, the problem of fruit cracking during the durian fruit expansion period is solved, and fruit quality and yield are improved.
Patent Information
- Application Number
- CN202511474354.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-01-16
AI Technical Summary
Durians are prone to cracking during the fruit enlargement period, and existing fertilizers are insufficient to meet their special nutritional needs, resulting in damage to fruit quality and economic benefits.
Using mineral-derived potassium humate, compound nucleotides, polysaccharide seaweed extract organic fertilizer, and other ingredients, this fertilizer is formulated to prevent durian fruit cracking by improving soil structure, promoting plant growth, enhancing cell wall toughness, and nutrient transport.
It effectively reduces fruit cracking rate, improves durian fruit quality and yield, improves soil environment, and promotes balanced absorption and utilization of nutrients.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of fertilizer technology, and in particular to a special fertilizer for preventing durian fruit cracking and its preparation method. Background Technology
[0002] As a newly cultivated crop in China, the market for durian-specific fertilizers is still in its infancy. Domestic development started late, and there is a lack of systematic research, resulting in few mature, targeted "specialized fertilizers" or fertilizers specifically formulated for the entire growth cycle. Growers generally rely on ordinary compound fertilizers or formulate their own fertilizers based on experience, making it difficult to accurately meet the specific nutritional needs of durians during their critical growth stages (especially fruit setting). With the rapid expansion of durian planting areas in China (especially in Hainan and other regions), growers' demand for improving durian yield and quality is becoming increasingly urgent, creating a clear market demand for specialized fertilizers (especially those specifically formulated for the flowering period).
[0003] Meanwhile, durians are prone to cracking during the fruit enlargement stage, severely impacting fruit quality and economic benefits. The causes of cracking are complex, often related to uneven water supply, nutrient imbalance (especially calcium deficiency or impaired absorption), and poor soil conditions. Currently, conventional fertilizers, while meeting the basic nutritional needs of durians, have limited effectiveness in preventing cracking, thus lacking a solution to significantly improve durian yield and quality. Therefore, to increase durian yield and quality and reduce fruit cracking, a specialized fertilizer for preventing durian cracking is urgently needed. Summary of the Invention
[0004] The purpose of this invention is to provide a special fertilizer for preventing durian fruit cracking and its preparation method. This aims to improve the fruit cracking phenomenon that occurs during the fruit enlargement period, thereby enhancing the fruit quality and economic benefits of durian.
[0005] To achieve the above objectives, this invention provides a special fertilizer for preventing durian fruit cracking, comprising the following raw materials in parts by weight: 5-20 parts of mineral-derived potassium humate, 2-10 parts of compound nucleotides, 5-15 parts of polysaccharide seaweed extract organic fertilizer, 10-25 parts of amino acid-containing water-soluble fertilizer, 0.5-5 parts of polyphenol complex, 1-3 parts of polyglutamic acid, 5-15 parts of sugar alcohol chelated calcium, 3-4 parts of sodium tetrahydrate octaborate, 4-6 parts of soil conditioner, 7-13 parts of potassium source, 0.5-1.2 parts of iron source, 4-6 parts of magnesium source, 0.05-0.5 parts of copper source, and 0.3-0.8 parts of zinc source.
[0006] In this invention, the polyphenol complex includes tea polyphenols and / or proanthocyanidins.
[0007] In this invention, the soil conditioner includes calcium carbonate and / or calcium sulfate.
[0008] In this invention, the potassium source material includes potassium olefin phosphate and potassium silicate, and the mass ratio of potassium olefin phosphate to potassium silicate is 3-5:4-8.
[0009] In this invention, the iron source material includes one or more of EDDHA chelated iron, EDTA chelated iron, and glycine iron.
[0010] In this invention, the magnesium source material includes sugar alcohol chelated magnesium and / or glycine magnesium.
[0011] In this invention, the copper source material includes copper glycine and / or copper methionine.
[0012] In this invention, the zinc source material includes sugar alcohol chelated zinc and / or glycine zinc.
[0013] This invention also provides a method for preparing the above-mentioned fertilizer specifically for preventing durian fruit cracking, comprising the following steps: A special fertilizer for preventing durian fruit cracking is obtained by mixing mineral-derived potassium humate, compound nucleotides, polysaccharide seaweed extract organic fertilizer, amino acid-containing water-soluble fertilizer, polyphenol complex, polyglutamic acid, sugar alcohol chelated calcium, sodium tetrahydrate octaborate, soil conditioner, potassium source, iron source, magnesium source, copper source, and zinc source, granulating and drying the mixture.
[0014] In this invention, the drying temperature is 40-45℃.
[0015] The present invention has the following beneficial effects: This invention provides a special fertilizer for preventing durian fruit cracking, comprising the following raw materials in parts by weight: 5-20 parts of mineral-derived potassium humate, 2-10 parts of compound nucleotides, 5-15 parts of polysaccharide seaweed extract organic fertilizer, 10-25 parts of amino acid-containing water-soluble fertilizer, 0.5-5 parts of polyphenol complex, 1-3 parts of polyglutamic acid, 5-15 parts of sugar alcohol chelated calcium, 3-4 parts of sodium tetrahydrate octaborate, 4-6 parts of soil conditioner, 7-13 parts of potassium source, 0.5-1.2 parts of iron source, 4-6 parts of magnesium source, 0.05-0.5 parts of copper source, and 0.3-0.8 parts of zinc source.
[0016] This invention uses mineral-derived potassium humate, compound nucleotides, and polysaccharide seaweed extract organic fertilizer as raw materials. It has the functions of improving soil structure, promoting the formation of soil aggregate structure, and improving soil water retention, fertilizer retention capacity and permeability.
[0017] Potassium humate from mineral sources possesses numerous polar groups such as hydroxyl (-OH) and carboxyl (-COOH), which can bind with clay or mineral particles in the soil through hydrogen bonds and van der Waals forces to form aggregate structures. These aggregate structures are highly stable and not easily destroyed by rainwater or irrigation. Furthermore, they carry a negative charge and can adsorb cations in the soil (such as potassium humate). + Ca2+ Mg 2+ It contains nutrient ions, reducing nutrient loss with water; at the same time, it has strong water absorption, can store water through pores, reduce evaporation, and improve the soil's water retention capacity.
[0018] Complex nucleotides and polysaccharide seaweed extract, as organic fillers, can significantly enhance the stress resistance (such as drought and cold resistance) of durian plants, promote photosynthesis, optimize the overall growth and development of plants, and lay the foundation for high yield and quality.
[0019] Amino acid-containing water-soluble fertilizers can directly provide organic nitrogen sources, which are absorbed by the roots without requiring energy conversion, quickly replenishing nitrogen and accelerating fruit peel cell division. During the durian expansion period, it can alleviate the sudden increase in pulp swelling pressure caused by nitrogen, phosphorus, and potassium imbalance, reducing the driving force for fruit cracking from the root. The phenolic hydroxyl groups in the polyphenol complex can cross-link pectin polysaccharide chains, enhancing cell wall toughness and protecting the integrity of fruit peel cell membranes.
[0020] Polyglutamic acid contains a large number of carboxyl groups (-COOH) on its molecular chain, which have strong hydrophilicity and can absorb a large amount of water. After forming a hydrated gel, it can improve the water retention capacity of the soil, maintain the stability of the turgor pressure of the fruit peel cells, and reduce fruit cracking. At the same time, the carboxyl groups can also form stable chelates with cations in the soil (such as calcium, magnesium, iron, zinc, etc.), preventing nutrients from being fixed and rendered ineffective by the soil.
[0021] In sugar alcohol chelated calcium, the calcium exists in a chelated state. Sugar alcohol can carry calcium ions through the cell membrane of root epidermal cells, preventing calcium from being trapped during transportation, promoting the movement of calcium to the fruit and other parts that require it, increasing the hardness of the durian shell, and directly reducing the occurrence of fruit cracking.
[0022] Sodium octaborate tetrahydrate provides boron, which promotes the transport of elements such as calcium and potassium within the durian fruit. During the fruit enlargement stage, it can reduce uneven fruit development caused by obstructed nutrient transport. Simultaneously, boron participates in cell wall synthesis, enhancing the cellular structural stability of durian shoots and young fruits, and reducing the risk of fruit cracking and deformities.
[0023] Soil conditioners can regulate soil pH, prevent the soil environment from becoming too acidic or alkaline, improve soil aggregate structure, reduce compaction, and enhance the respiration and nutrient absorption capacity of durian roots (significantly improving the absorption and utilization rate of major elements such as nitrogen, phosphorus, and potassium), which is the basis for efficient nutrient absorption (especially calcium).
[0024] Potassium, iron, magnesium, copper, and zinc sources provide the necessary nutrients for durian growth. The dosage of each component is also carefully controlled to avoid excess or deficiency of any single element. Combined with soil conditioners, this enhances the durian's nutrient absorption efficiency, resulting in a balanced and comprehensive nutrient supply that promotes lush foliage, glossy leaves, and robust growth, laying the foundation for high yields. It also strengthens the durian's resistance to adverse conditions, ultimately leading to fuller, more flavorful fruit.
[0025] This invention provides a special fertilizer for preventing durian fruit cracking, addressing the core causes of durian cracking through four dimensions: soil environment optimization, fruit cell wall strengthening, cell metabolism regulation, and water and nutrient balance. The fertilizer comprises mineral-derived potassium humate, polysaccharide seaweed extract organic fertilizer, and a soil conditioner. These components improve the soil, activate the root system, and enhance nutrient utilization, creating conditions for the absorption and utilization of subsequent anti-cracking components. The synergistic effect of sugar alcohol chelated calcium, sodium octaborate tetrahydrate, amino acid-containing water-soluble fertilizer, and polyphenol complex allows the sugar alcohol chelated calcium to provide calcium, while sodium octaborate tetrahydrate promotes calcium transport within the durian, particularly to the fruit, and participates in pectin synthesis. The amino acid-containing water-soluble fertilizer enhances cell membrane permeability, promoting the entry of calcium and boron into fruit cells. The polyphenol complex binds to cellulose and pectin in the cell wall, forming a cross-linked structure that enhances the tensile strength of the cell wall, making the cell wall structure more stable and reducing fruit cracking caused by cell wall fragility.
[0026] Complex nucleotides promote uniform cell division in fruits, reducing fruit cracking caused by excessively rapid local cell development. The seaweed polysaccharides and natural hormones in the polysaccharide-rich seaweed extract organic fertilizer coordinate fruit growth rhythms, promoting orderly cell enlargement. Zinc sources promote the transport of auxin, preventing abnormal growth caused by excessive auxin in certain areas. Together with the former two, they maintain fruit morphological uniformity and regulate cell metabolism, making durian fruit growth more coordinated and improving cracking caused by uneven cell metabolism. Copper sources enhance and strengthen cell wall disease resistance (inhibiting fungal rot and cracking of the peel), synergistically enhancing the fruit's resistance to pathogens along with polysaccharides (antibacterial effect).
[0027] Polyglutamic acid, potassium, magnesium, and iron work synergistically to reduce the risk of fruit cracking by regulating the stability of water and nutrients. Polyglutamic acid, as a high-molecular-weight water-retaining substance, reduces excessive water absorption by durian from the soil, preventing fruit cracking due to excessive water absorption or rapid water loss during drought. Its viscous structure also adsorbs potassium and magnesium, prolonging fertilizer effectiveness. Potassium regulates the osmotic pressure of fruit cells, enhancing their water-retention capacity and reducing the impact of sudden water changes on cells. Magnesium ensures the photosynthetic efficiency of leaves, providing continuous energy for the fruit. Iron ensures chlorophyll synthesis and works synergistically with magnesium to maintain photosynthetic efficiency, providing the energy foundation for the fruit. Copper participates in the electron transfer process during photosynthesis, assisting iron in its function and preventing the interruption of the photosynthetic chain due to copper deficiency.
[0028] The technical solution of the present invention will be further described in detail below through embodiments. Detailed Implementation
[0029] The present invention will be further described below with reference to embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate the invention and are not intended to limit the scope of the invention.
[0030] Example 1 A special fertilizer for preventing durian fruit cracking includes: 5 parts potassium humate from mineral source, 10 parts compound nucleotides, 10 parts polysaccharide seaweed extract organic fertilizer, 15 parts water-soluble fertilizer containing amino acids, 3 parts tea polyphenols, 2 parts polyglutamic acid, 15 parts sugar alcohol chelated calcium, 3 parts sodium tetrahydrate octaborate, 5 parts calcium carbonate, 7 parts potassium source, 1.2 parts EDDHA chelated iron, 4 parts sugar alcohol chelated magnesium, 0.25 parts methionine copper, and 0.3 parts sugar alcohol chelated zinc.
[0031] The potassium source materials include 3 parts potassium phosphate and 4 parts potassium silicate.
[0032] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 5 parts of mineral-derived potassium humate, 10 parts of compound nucleotides, 10 parts of polysaccharide seaweed extract organic fertilizer, 15 parts of amino acid-containing water-soluble fertilizer, 3 parts of tea polyphenols, 2 parts of polyglutamic acid, 15 parts of sugar alcohol chelated calcium, 3 parts of sodium tetrahydrate octaborate, 5 parts of calcium carbonate, 3 parts of potassium phosphate, 4 parts of potassium silicate, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc, granulate the mixture, and then dry the masterbatch at 45℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0033] Example 2 A special fertilizer for preventing durian fruit cracking includes: The ingredients include: 10 parts potassium humate from mineral sources, 2 parts compound nucleotides, 8 parts polysaccharide seaweed extract organic fertilizer, 10 parts water-soluble fertilizer containing amino acids, 5 parts tea polyphenols, 1 part polyglutamic acid, 15 parts sugar alcohol chelated calcium, 4 parts sodium tetraborate tetrahydrate, 4 parts calcium carbonate, 11 parts potassium source, 1.2 parts EDTA chelated iron, 5 parts magnesium glycine, 0.1 parts copper glycine, and 0.8 parts zinc glycine.
[0034] The potassium source materials include 5 parts potassium phosphate and 6 parts potassium silicate.
[0035] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 10 parts of mineral-derived potassium humate, 2 parts of compound nucleotides, 8 parts of polysaccharide seaweed extract organic fertilizer, 10 parts of amino acid-containing water-soluble fertilizer, 5 parts of tea polyphenols, 1 part of polyglutamic acid, 15 parts of sugar alcohol chelated calcium, 4 parts of sodium tetrahydrate octaborate, 4 parts of calcium carbonate, 5 parts of potassium phosphate, 6 parts of potassium silicate, 1.2 parts of EDTA chelated iron, 5 parts of glycine magnesium, 0.1 parts of glycine copper, and 0.8 parts of glycine zinc, granulate, and then dry the masterbatch at 40℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0036] Example 3 A special fertilizer for preventing durian fruit cracking includes: 18 parts of mineral-derived potassium humate, 8 parts of compound nucleotides, 13 parts of polysaccharide seaweed extract organic fertilizer, 18 parts of amino acid-containing water-soluble fertilizer, 1 part of proanthocyanidins, 1 part of polyglutamic acid, 10 parts of sugar alcohol chelated calcium, 3 parts of sodium tetraborate tetrahydrate, 6 parts of calcium sulfate, 13 parts of potassium source, 0.5 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.05 parts of methionine copper, and 0.8 parts of glycine zinc.
[0037] The potassium source materials include 5 parts potassium phosphate and 8 parts potassium silicate.
[0038] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 18 parts of mineral-derived potassium humate, 8 parts of compound nucleotides, 13 parts of polysaccharide seaweed extract organic fertilizer, 18 parts of amino acid-containing water-soluble fertilizer, 1 part of proanthocyanidins, 1 part of polyglutamic acid, 10 parts of sugar alcohol chelated calcium, 3 parts of sodium tetrahydrate octaborate, 6 parts of calcium sulfate, 5 parts of potassium phosphate, 8 parts of potassium silicate, 0.5 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.05 parts of methionine copper, and 0.8 parts of glycine zinc, granulate, and then dry the masterbatch at 40℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0039] Example 4 A special fertilizer for preventing durian fruit cracking includes: 20 parts of mineral-derived potassium humate, 5 parts of compound nucleotides, 15 parts of polysaccharide seaweed extract organic fertilizer, 25 parts of amino acid-containing water-soluble fertilizer, 0.5 parts of tea polyphenols, 3 parts of polyglutamic acid, 5 parts of sugar alcohol chelated calcium, 4 parts of sodium tetrahydrate octaborate, 4 parts of calcium sulfate, 10 parts of potassium source, 0.5 parts of glycine iron, 6 parts of glycine magnesium, 0.5 parts of methionine copper, and 0.5 parts of sugar alcohol chelated zinc.
[0040] The potassium source materials include 5 parts potassium phosphate and 5 parts potassium silicate.
[0041] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 20 parts of mineral-derived potassium humate, 5 parts of compound nucleotides, 15 parts of polysaccharide seaweed extract organic fertilizer, 25 parts of amino acid-containing water-soluble fertilizer, 0.5 parts of tea polyphenols, 3 parts of polyglutamic acid, 5 parts of sugar alcohol chelated calcium, 4 parts of sodium tetrahydrate octaborate, 4 parts of calcium sulfate, 5 parts of potassium phosphate, 5 parts of potassium silicate, 0.5 parts of glycine iron, 6 parts of glycine magnesium, 0.5 parts of methionine copper, and 0.5 parts of sugar alcohol chelated zinc. Granulate the mixture to obtain masterbatch. Dry the masterbatch at 45℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0042] Example 5 A special fertilizer for preventing durian fruit cracking includes: 15 parts of mineral-derived potassium humate, 6 parts of compound nucleotides, 5 parts of polysaccharide seaweed extract organic fertilizer, 13 parts of amino acid-containing water-soluble fertilizer, 2 parts of tea polyphenols, 3 parts of polyglutamic acid, 10 parts of sugar alcohol chelated calcium, 3 parts of sodium tetraborate tetrahydrate, 6 parts of calcium sulfate, 8 parts of potassium source, 0.8 parts of EDDHA chelated iron, 6 parts of sugar alcohol chelated magnesium, 0.4 parts of glycine copper, and 0.3 parts of sugar alcohol chelated zinc.
[0043] The potassium source materials include 3 parts potassium phosphate and 5 parts potassium silicate.
[0044] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 15 parts of mineral-derived potassium humate, 6 parts of compound nucleotides, 5 parts of polysaccharide seaweed extract organic fertilizer, 13 parts of amino acid-containing water-soluble fertilizer, 2 parts of tea polyphenols, 3 parts of polyglutamic acid, 10 parts of sugar alcohol chelated calcium, 3 parts of sodium tetrahydrate octaborate, 6 parts of calcium sulfate, and potassium source substances including 3 parts of potassium phosphate, 5 parts of potassium silicate, 0.8 parts of EDDHA chelated iron, 6 parts of sugar alcohol chelated magnesium, 0.4 parts of glycine copper, and 0.3 parts of sugar alcohol chelated zinc. Granulate the mixture to obtain masterbatch. Dry the masterbatch at 45℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0045] Comparative Example 1 A special fertilizer for preventing durian fruit cracking includes: 5 parts of mineral-derived potassium humate, 10 parts of compound nucleotides, 10 parts of polysaccharide seaweed extract organic fertilizer, 15 parts of amino acid-containing water-soluble fertilizer, 3 parts of tea polyphenols, 2 parts of polyglutamic acid, 3 parts of sodium tetrahydrate octaborate, 5 parts of calcium carbonate, 7 parts of potassium source, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc.
[0046] The potassium source materials include 3 parts potassium phosphate and 4 parts potassium silicate.
[0047] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Five parts of mineral-derived potassium humate, ten parts of compound nucleotides, ten parts of polysaccharide seaweed extract organic fertilizer, fifteen parts of amino acid-containing water-soluble fertilizer, three parts of tea polyphenols, two parts of polyglutamic acid, three parts of sodium tetrahydrate octaborate, five parts of calcium carbonate, three parts of potassium phosphate, four parts of potassium silicate, one and two parts of EDDHA chelated iron, four parts of sugar alcohol chelated magnesium, one and two parts of methionine copper, and one and two and three parts of sugar alcohol chelated zinc are mixed, granulated, and the resulting masterbatch is dried at 45°C until the moisture content is less than 3%, thus obtaining a special fertilizer for preventing durian fruit cracking.
[0048] Comparative Example 2 A special fertilizer for preventing durian fruit cracking includes: 5 parts of mineral-derived potassium humate, 10 parts of compound nucleotides, 10 parts of polysaccharide seaweed extract organic fertilizer, 15 parts of amino acid-containing water-soluble fertilizer, 2 parts of polyglutamic acid, 15 parts of sugar alcohol chelated calcium, 5 parts of calcium carbonate, 7 parts of potassium source, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc.
[0049] The potassium source materials include 3 parts potassium phosphate and 4 parts potassium silicate.
[0050] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 5 parts of mineral-derived potassium humate, 10 parts of compound nucleotides, 10 parts of polysaccharide seaweed extract organic fertilizer, 15 parts of amino acid-containing water-soluble fertilizer, 2 parts of polyglutamic acid, 15 parts of sugar alcohol chelated calcium, 5 parts of calcium carbonate, 3 parts of potassium phosphate, 4 parts of potassium silicate, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc. Granulate the mixture to obtain masterbatch. Dry the masterbatch at 45℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0051] Comparative Example 3 A special fertilizer for preventing durian fruit cracking includes: It contains 15 parts of amino acid water-soluble fertilizer, 3 parts of tea polyphenols, 2 parts of polyglutamic acid, 15 parts of sugar alcohol chelated calcium, 3 parts of sodium tetrahydrate octaborate, 5 parts of calcium carbonate, 7 parts of potassium source, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc.
[0052] The potassium source materials include 3 parts potassium phosphate and 4 parts potassium silicate.
[0053] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Mix 15 parts of water-soluble fertilizer containing amino acids, 3 parts of tea polyphenols, 2 parts of polyglutamic acid, 15 parts of sugar alcohol chelated calcium, 3 parts of sodium tetrahydrate octaborate, 5 parts of calcium carbonate, 3 parts of potassium phosphate, 4 parts of potassium silicate, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc. Granulate the mixture to obtain masterbatch. Dry the masterbatch at 45℃ until the moisture content is <3% to obtain a special fertilizer for preventing durian fruit cracking.
[0054] Comparative Example 4 A special fertilizer for preventing durian fruit cracking includes: 5 parts of mineral-derived potassium humate, 10 parts of compound nucleotides, 10 parts of polysaccharide seaweed extract organic fertilizer, 15 parts of amino acid-containing water-soluble fertilizer, 3 parts of tea polyphenols, 2 parts of polyglutamic acid, 3 parts of sodium tetraborate tetrahydrate, 7 parts of potassium source, 1.2 parts of EDDHA chelated iron, 4 parts of sugar alcohol chelated magnesium, 0.25 parts of methionine copper, and 0.3 parts of sugar alcohol chelated zinc.
[0055] The potassium source materials include 3 parts potassium phosphate and 4 parts potassium silicate.
[0056] The preparation method of the above-mentioned special fertilizer for preventing durian fruit cracking includes: Five parts of mineral-derived potassium humate, ten parts of compound nucleotides, ten parts of polysaccharide seaweed extract organic fertilizer, fifteen parts of amino acid-containing water-soluble fertilizer, three parts of tea polyphenols, two parts of polyglutamic acid, three parts of sodium tetrahydrate octaborate, three parts of potassium phosphate, four parts of potassium silicate, one and two parts of EDDHA chelated iron, four parts of sugar alcohol chelated magnesium, one and two parts of methionine copper, and one and two and three parts of sugar alcohol chelated zinc are mixed, granulated, and the resulting masterbatch is dried at 45°C until the moisture content is less than 3%, thus obtaining a special fertilizer for preventing durian fruit cracking.
[0057] Application examples The special fertilizer for preventing durian cracking prepared in Example 1 and Comparative Examples 1-4 of this invention was used to conduct fertilization experiments on Musang King durians. The Musang King durians were divided into 5 groups. Group A was fertilized with the special fertilizer for preventing durian cracking prepared in Example 1, Group B was fertilized with the special fertilizer for preventing durian cracking prepared in Comparative Example 1, Group C was fertilized with the special fertilizer for preventing durian cracking prepared in Comparative Example 2, Group D was fertilized with the special fertilizer for preventing durian cracking prepared in Comparative Example 3, and Group E was fertilized with the special fertilizer for preventing durian cracking prepared in Comparative Example 4. The peel index and the fresh weight of the fruit at maturity (fresh weight of the fruit of the durian that has not cracked) were tested in the later stage of fruit enlargement. The results are shown in Table 1.
[0058] Table 1. Peel Indicators
[0059] As shown in Table 1, the special fertilizer for preventing durian fruit cracking provided by this invention can reduce the cracking rate to 5.2%, effectively improving the durian fruit cracking problem. Data from Comparative Example 1 shows that the cracking rate increased sharply after the lack of sugar alcohol chelated calcium. Data from Comparative Example 2 shows that the lack of tea polyphenols and sodium octaborate tetrahydrate reduced cell wall toughness, hindered Ca ion transport, and prevented effective transport of Ca ions to the required parts, leading to an increased cracking rate. Data from Comparative Example 3 shows that the lack of mineral-derived potassium humate, complex nucleotides, and polysaccharide seaweed extract organic fertilizer resulted in nutrient deficiency in the soil, decreased fruit fresh weight, and an increased cracking rate. Data from Comparative Example 4 shows that the cracking rate reached 14.9% after the lack of sugar alcohol chelated calcium and calcium carbonate, due to a severe deficiency of Ca within the durian, leading to a sharp increase in the cracking rate.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. A special fertilizer for preventing durian fruit cracking, characterized in that, The raw materials include the following by mass fraction: 5-20 parts of potassium fulvic acid, 2-10 parts of complex nucleotide, 5-15 parts of alginate organic fertilizer, 10-25 parts of water-soluble fertilizer containing amino acid, 0.5-5 parts of polyphenol complex, 1-3 parts of polyglutamic acid, 5-15 parts of sugar alcohol chelated calcium, 3-4 parts of sodium octaborate tetrahydrate, 4-6 parts of soil conditioner, 7-13 parts of potassium source material, 0.5-1.2 parts of iron source material, 4-6 parts of magnesium source material, 0.05-0.5 parts of copper source material, and 0.3-0.8 parts of zinc source material.
2. The special fertilizer for preventing the splitting of durian according to claim 1, characterized in that, The polyphenol complex includes tea polyphenols and / or procyanidins.
3. The special fertilizer for preventing the cracking of durian according to claim 1, characterized in that, The soil conditioner includes calcium carbonate and / or calcium sulfate.
4. The special fertilizer for preventing the cracking of durian according to claim 1, characterized in that, The potassium source material includes potassium phosphonate and potassium silicate, and the mass ratio of potassium phosphonate to potassium silicate is 3-5:4-8.
5. The special fertilizer for preventing the cracking of durian according to claim 1, characterized in that, The iron source material includes one or more of EDDHA chelated iron, EDTA chelated iron, and glycine iron.
6. The special fertilizer for preventing the cracking of durian according to claim 1, characterized in that, The magnesium source material includes sugar alcohol chelated magnesium and / or glycine magnesium.
7. The special fertilizer for preventing the cracking of durian according to claim 1, characterized in that, The copper source material includes glycine copper and / or methionine copper.
8. The special fertilizer for preventing the cracking of durian according to claim 1, characterized in that, The zinc source material includes sugar alcohol chelated zinc and / or glycine zinc.
9. The preparation method of the special fertilizer for preventing the splitting of durian fruits according to any one of claims 1-8, characterized in that, The method includes the following steps: Mixing potassium fulvic acid, complex nucleotide, alginate organic fertilizer, water-soluble fertilizer containing amino acid, polyphenol complex, polyglutamic acid, sugar alcohol chelated calcium, sodium octaborate tetrahydrate, soil conditioner, potassium source material, iron source material, magnesium source material, copper source material, and zinc source material, granulating, and drying to obtain the special fertilizer for preventing durian fruit cracking.
10. The method for preparing the special fertilizer for preventing the fruit cracking of the durian according to claim 9, characterized in that, The drying temperature is 40-45 DEG C.