Water flush fertilizer for enhancing functional quality of Chinese yam and use method of water flush fertilizer

Abstract

The invention relates to the technical field of plant fertilizers, in particular to a water flush fertilizer for strengthening the functional quality of Chinese yam and a use method, the water flush fertilizer comprises the following raw materials in parts by weight: 90-94 parts of a traditional Chinese medicine stock solution, 0.4-0.8 part of chitosan, 2-4 parts of amino acid raw powder and 3-6 parts of an EDTA (Ethylene Diamine Tetraacetic Acid) decoction, the traditional Chinese medicine stock solution is prepared by decocting traditional Chinese medicinal materials, and the traditional Chinese medicinal materials are selected from at least one of the following combinations: a combination of rehmannia and herba epimedii, a combination of ligusticum wallichii and fructus aurantii, a combination of pinellia ternate and lotus leaves, a combination of lysimachia christinae hance and cortex phellodendri, and a combination of astragalus membranaceus and rhizoma anemarrhenae; after being diluted, the water flush fertilizer is directly applied in a water flush mode or dripped around yam tubers and / or root systems through a special drip irrigation device, so that the yam tubers and / or the root systems are soaked by the liquid medicine; the water flush fertilizer is a plant source water flush fertilizer with specific traditional Chinese medicine liquid as a main component, the content of functional substances in Chinese yam tubers is promoted and increased in combination with supplementation of medium trace elements, the health-care effect of Chinese yams is improved, and application is safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of plant fertilizers, and in particular to a fertilization method for enhancing the functional quality of yam. Background Art

[0002] Chinese yam is a traditional Chinese food and medicine crop with rich nutritional value and outstanding health care functions. It has the effects of nourishing the spleen and stomach, promoting the production of body fluids and benefiting the lungs, nourishing the kidneys and astringing semen, etc. It is deeply loved by consumers and has a very broad market prospect. The content of functional substances in yam is an important material basis for its health care function. Improving the content of functional substances through technical means has become an important content of yam production technology research and development in recent years. As people pay more attention to the role of food therapy in "preventing disease before it occurs", higher requirements are put forward for the functional quality of yam products.

[0003] Chinese yam is an underground rhizome crop. Applying inputs around the rhizomes is the most effective way to directly affect the development of the rhizomes. Fertilization is an important agricultural input that can directly act on the root system of crops. Applying the concept and technical guidance of "Chinese medicine agriculture" to develop special fertilization for yam is an important way to enhance the functional quality of yam. Through years of practice, the team has found that applying Chinese medicine liquid around yam tubers and roots in the late growth period of yam can significantly improve the functional quality of yam. On this basis, combined with the characteristics of yam fertilizer requirements, a new product of fertilization that enhances the functional quality of yam has been developed. Summary of the invention

[0004] In order to enhance the content of functional substances in yam tubers, conventional planting methods are integrated with the concept and technical means of "Chinese medicine agriculture" to provide a method of applying fertilizer to enhance the functional quality of yam. The fertilization developed by the present invention can increase the yield and increase the content of main functional substances in yam tubers.

[0005] In order to achieve the above objectives, the present invention is implemented by the following technical solutions:

[0006] A flushing fertilizer for enhancing the functional quality of yam, comprising the following raw materials by weight:

[0007] 90-94 parts of Chinese medicine stock solution, 0.4-0.8 parts of chitosan, 2-4 parts of amino acid raw powder, 3-6 parts of EDTA decoction;

[0008] The Chinese medicine stock solution is obtained by boiling Chinese medicinal materials, and the Chinese medicinal materials are selected from at least one of the following combinations: a combination of Rehmannia root and Epimedium brevicornum, a combination of Chuanxiong and Fructus Aurantii Immaturus, a combination of Pinellia tuber and Lotus leaf, a combination of Lysimachia scabra and Phellodendron amurense, and a combination of Astragalus membranaceus and Rhizoma Anemarrhenae.

[0009] Furthermore, the EDTA complex consists of EDTA complexed with calcium, EDTA complexed with iron, and EDTA complexed with zinc.

[0010] Furthermore, the raw materials are configured according to the following weight proportions: 1.2 to 1.8 parts of EDTA-calculated calcium, 1.2 to 1.8 parts of EDTA-calculated iron, and 1.2 to 1.6 parts of EDTA-calculated zinc;

[0011] The effective content of Fe in the EDTA chelated iron is ≥13wt%; the effective content of Ca in the EDTA chelated calcium is ≥9.5wt%; the effective content of Zn in the EDTA chelated zinc is ≥14.5wt%.

[0012] Preferably, a flushing fertilizer for enhancing the functional quality of yam includes the following raw materials by weight: 92 parts of Chinese medicinal material stock solution, 0.6 parts of chitosan, 3 parts of amino acid raw powder, 1.5 parts of EDTA-calcium, 1.5 parts of EDTA-iron, and 1.4 parts of EDTA-zinc.

[0013] Further, the chitosan has a deacetylation degree of at least 85%;

[0014] The amino acid raw powder includes the following materials in weight percentage: composite amino acid ≥35wt%, organic matter ≥40wt%, and total nutrients of nitrogen, phosphorus and potassium ≥22wt%.

[0015] Furthermore, in the combination of Rehmannia root and Epimedium brevicornum, Rehmannia root and Epimedium brevicornum are in equal mass ratio; Rehmannia root has the effects of clearing away heat and cooling blood, nourishing yin and promoting body fluid, and Epimedium brevicornum has the effects of nourishing kidney yang, strengthening tendons and bones, and removing rheumatism, and the combination of the two has the pharmacological effects of nourishing kidney and replenishing essence, etc.;

[0016] In the combination of Chuanxiong and Citrus aurantium, Chuanxiong and Citrus aurantium are in equal mass ratio; Chuanxiong has the effects of promoting blood circulation and qi, dispelling wind and relieving pain, and Citrus aurantium has the effects of regulating qi and relieving fullness, relieving stagnation and relieving swelling, and the combination of the two has the pharmacological effects of soothing the liver and regulating qi;

[0017] In the combination of pinellia and lotus leaf, the pinellia and lotus leaf are in equal mass ratio; pinellia has the effects of drying dampness and resolving phlegm, relieving adverse reactions and stopping vomiting, and eliminating lumps and dispersing nodules, and lotus leaf has the effects of clearing away heat and relieving summer heat, promoting the flow of clear yang, and dispersing blood stasis and stopping bleeding. The combination of the two has the pharmacological effects of resolving phlegm and reducing turbidity;

[0018] In the combination of Lysimachia chinensis and Phellodendron chinense, Lysimachia chinensis and Phellodendron chinense are in equal mass ratios; Lysimachia chinensis has the effects of removing dampness and jaundice, promoting diuresis and relieving stranguria, detoxifying and reducing swelling, and Phellodendron chinense has the effects of clearing heat and drying dampness, purging fire and removing steam, detoxifying and treating sores, and the two are used together to have pharmacological effects such as clearing heat and removing dampness;

[0019] In the combination of Astragalus and Anemarrhena, Astragalus and Anemarrhena are in equal mass ratio; Astragalus has the effects of invigorating Qi and raising Yang, consolidating the exterior and stopping sweating, promoting diuresis and reducing swelling, promoting body fluid and nourishing blood, while Anemarrhena has the effects of clearing away heat and purging fire, nourishing Yin and moistening dryness. The combination of the two has pharmacological effects such as invigorating Qi and nourishing Yin.

[0020] Furthermore, the Chinese medicinal materials can be crushed so that the particle size of the Chinese medicinal materials is less than 50 meshes.

[0021] Furthermore, the Chinese medicine stock solution is obtained by the method: weighing the required Chinese medicinal materials, boiling each Chinese medicinal material according to a material-water weight ratio of 1:5-8, boiling each Chinese medicinal material 2-3 times, boiling for 60-90 minutes each time, filtering out each portion of the medicinal liquid and combining them to obtain the Chinese medicine stock solution; preferably, the Chinese medicine stock solution is obtained by the method: weighing the required Chinese medicinal materials, boiling each Chinese medicinal material according to a material-water weight ratio of 1:5, boiling each Chinese medicinal material 2-3 times, boiling for 60-100 minutes each time, filtering out each portion of the medicinal liquid and combining them to obtain the Chinese medicine stock solution;

[0022] The flushing fertilizer is obtained by weighing the Chinese medicine stock solution, amino acid raw powder and EDTA decoction according to a proportion, mixing and shaking them evenly.

[0023] Another aspect of the present invention provides a method for using the above-mentioned flushing fertilizer for enhancing the functional quality of yam, specifically: diluting the flushing fertilizer and directly flushing it or dripping it around the yam tuber and / or root system through a special drip irrigation device, so that the yam tuber epidermis and / or most of the root system are soaked in the drug solution.

[0024] Furthermore, the direct flushing is: diluting the flushing fertilizer with water within a range of 10 to 50 times (preferably diluting it with water 20-50 times, more preferably diluting it with water 30 times), and then flushing it around the yam tubers, with 1L of the diluted flushing fertilizer being applied to each yam plant each time.

[0025] Furthermore, the flushing fertilizer is used starting from 30 days before the yam is harvested, and is applied once every 5 to 12 days, for a total of 1 to 5 times, to enhance the health function of the yam; preferably, the flushing fertilizer is used starting from 30 days before the yam is harvested, and is applied once every 10 days, for a total of 3 times; or the flushing fertilizer is used starting from 30 days before the yam is harvested, and is applied once every 6 days, for a total of 5 times.

[0026] Furthermore, the cultivation technology requirements for the use of flushing fertilizer are: yam adopts the root-limited (directional groove or sleeve) substrate cultivation method to achieve a better effect of improving the functional quality of yam.

[0027] Beneficial technical effects:

[0028] (1) Increase the content of main health-care functional substances in yam tubers. Compared with existing flushing fertilizer products, this flushing fertilizer is a plant-based flushing fertilizer with a specific Chinese medicine liquid as the main ingredient. At the same time, it combines the supply of trace elements to increase the content of functional substances in yam tubers, enhance the health-care effects of yam, and is safe and reliable to use;

[0029] (2) The yam product is endowed with the efficacy of Chinese medicinal materials. According to the theory of traditional Chinese medicine, specific Chinese medicinal materials with medicinal properties matching those of yam are added to the matrix, and the effective ingredients of specific Chinese medicinal materials are supplemented in yam, thus endowing the yam with the efficacy of Chinese medicinal materials. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Unless otherwise specifically stated, the numerical value set forth in these embodiments does not limit the scope of the present invention. The technology and method known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology and method should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values.

[0032] The experimental methods in the following examples without specifying specific conditions are usually measured in accordance with national standards; if there is no corresponding national standard, the method is carried out in accordance with the general standard requirements or general methods.

[0033] The chitosan used in the following cases has a deacetylation degree of ≥90wt% and is provided by Huantai County Jinhu Crust Products Co., Ltd.

[0034] The amino acid raw powder used includes the following weight percentage materials: composite amino acid ≥35wt%, organic matter ≥40wt%, total nitrogen, phosphorus and potassium nutrients ≥22wt%, provided by Shandong Shimeite Agricultural Technology Co., Ltd.

[0035] The EDTA chelated iron used, wherein the effective content of Fe is ≥13wt%, is provided by Shandong Shimeite Agricultural Technology Co., Ltd.; the EDTA chelated calcium, wherein the effective content of Ca is ≥9.5wt%, is provided by Zhengzhou Zhongke Chemical Products Co., Ltd.; the EDTA chelated zinc, wherein the effective content of Zn is ≥14.5wt%, is provided by Zhengzhou Yinzhihai Chemical Co., Ltd.

[0036] Example 1

[0037] A flushing fertilizer for enhancing the functional quality of yam, comprising the following raw materials by weight: 92 parts of Chinese medicine stock solution, 0.6 parts of chitosan, 3 parts of amino acid raw powder, 1.5 parts of EDTA-boiled calcium, 1.5 parts of EDTA-boiled iron, and 1.4 parts of EDTA-boiled zinc;

[0038] The Chinese medicine stock solution is obtained by boiling Chinese medicinal materials, wherein the Chinese medicinal materials are a combination of Rehmannia root and Epimedium brevicornum, and Rehmannia root and Epimedium brevicornum are in equal mass ratios. The Chinese medicine stock solution is obtained by the method: Rehmannia root and Epimedium brevicornum are weighed, and each portion of Chinese medicinal materials is boiled in a conventional Chinese medicine decoction according to a material-water weight ratio of 1:5, and each portion of Chinese medicinal materials is boiled 3 times, each time for 90 minutes, and each portion of the liquid is filtered out and combined to obtain the Chinese medicine stock solution;

[0039] The flushing fertilizer is obtained by weighing chitosan, amino acid powder, EDTA-blended calcium, EDTA-blended iron and EDTA-blended zinc according to the above proportions, adding the above-obtained Chinese medicine stock solution, and shaking evenly to prepare the flushing fertilizer for enhancing the functional quality of yam.

[0040] Usage: Dilute the above-mentioned flushing fertilizer and apply it directly to the yam tubers and around the root system. Apply 1L of diluted flushing fertilizer to each yam each time, so that the yam tuber epidermis and most of the root system are soaked in the liquid.

[0041] Example 2

[0042] The fertilization and acquisition of the enhanced functional quality of yam in this case are the same as those in Example 1, except that the Chinese medicine stock solution in this case is obtained by boiling the Chinese medicinal materials Chuanxiong and Citrus aurantium (equal mass ratio), and the boiling process is the same as in Example 1.

[0043] Example 3

[0044] The fertilization and acquisition of the enhanced functional quality of yam in this case are the same as those in Example 1, except that the Chinese medicine stock solution in this case is obtained by boiling the Chinese medicinal materials Pinellia and lotus leaves (in equal mass ratio), and the boiling process is the same as in Example 1.

[0045] Example 4

[0046] The fertilization and acquisition of the enhanced functional quality of yam in this case are the same as those in Example 1, except that the Chinese medicine stock solution in this case is obtained by boiling the Chinese medicinal materials Lysimachia scabra and Phellodendron chinense (in equal mass ratio), and the boiling process is the same as in Example 1.

[0047] Example 5

[0048] The fertilization and acquisition of the enhanced functional quality of yam in this case are the same as those in Example 1, except that the Chinese medicine stock solution in this case is obtained by boiling the Chinese medicinal materials Astragalus and Anemarrhena (equal mass ratio), and the boiling process is the same as in Example 1.

[0049] Test Example 1

[0050] This case study investigates the appropriate number of flushing fertilizer applications for enhancing the functional quality of yam according to the present invention.

[0051] 1. Experimental Design

[0052] The experiment was conducted at the Liuhe Experimental Base of Jiangsu Academy of Agricultural Sciences in 2023. The yam variety tested was Sujie No. 6, and the casing planting method was adopted, and the casing was filled with a matrix. The flushing fertilizer was the flushing fertilizer prepared in Example 1.

[0053] The method of using flush fertilizer is: dilute the flush fertilizer according to the experimental dilution multiple, and apply the diluted flush fertilizer solution directly around the yam tubers and roots, so that the yam tuber epidermis and most of the roots are soaked in the solution; flush fertilizer should be used 30 days before yam harvest, and 1L of diluted flush fertilizer should be applied to each yam each time.

[0054] The total amount of fertilizer applied to each treatment was the same. Four treatments were set according to the different times of flushing fertilizer application:

[0055] Treatment 1: Dilute the original solution of flushing fertilizer 10 times and apply it once, 30 days before harvest.

[0056] Treatment 2: Dilute the original solution of flushing fertilizer 30 times and apply it three times, 30 days, 20 days and 10 days before harvest respectively.

[0057] Treatment 3: Dilute the original fertilizer solution 50 times and apply it in 5 times, 30 days, 24 days, 18 days, 12 days and 6 days before harvest respectively.

[0058] Treatment 4: Control, clean water.

[0059] 2. Survey and measurement content

[0060] 2.1 Yield structure investigation: The yield of yam in each treatment was measured during the harvest period.

[0061] 2.2 Quality determination: The contents of polysaccharides, saponins and flavonoids were determined for the yam tuber samples collected from each treatment.

[0062] 2.3 Determination of functional substances: Determine the components of the added medicinal materials in the yam tubers of each treatment.

[0063] 3. Conclusion

[0064] Table 1 Yield and quality of Chinese yam with different treatments (mixture of equal weight of Rehmannia root and Epimedium)

[0065]

[0066] Judging from the yield and quality of yam in the above four treatments, the application of Chinese medicinal liquid has a certain effect on improving the content of functional substances in yam tubers. The yam yield and functional substance content were the highest in the treatment of applying Chinese medicinal liquid 2 times and 3 times, and the performance was the best.

[0067] Test Example 2

[0068] This case study examines the appropriate dilution ratio of fertilization to enhance the functional quality of yam.

[0069] 1. Experimental Design

[0070] The experiment was conducted at the Liuhe Experimental Base of Jiangsu Academy of Agricultural Sciences in 2023. The yam variety tested was Sujie No. 10, and the directional trough planting method was adopted, and the directional trough was filled with a substrate. The flushing fertilizer was the flushing fertilizer prepared in Example 1.

[0071] The method of using flush fertilizer is: dilute the flush fertilizer according to the experimental dilution multiple, and directly apply the diluted flush fertilizer solution around the yam tubers and roots, so that the yam tuber epidermis and most of the roots are soaked in the solution; flush fertilizer should be used 30 days before yam harvest, and applied in 3 times, 30 days, 20 days, and 10 days before harvest respectively, and each yam should be applied with 1L of diluted flush fertilizer each time.

[0072] All fertilizers were flushed the same number of times. Five treatments were set up according to the different dilution multiples of the flushed fertilizers:

[0073] Treatment 1: Dilute the fertilization solution 10 times

[0074] Treatment 2: Dilute the fertilization solution 20 times

[0075] Treatment 3: Dilute the fertilization solution 30 times

[0076] Treatment 4: Dilute the fertilization solution 40 times

[0077] Treatment 5: Control, clean water

[0078] 2. Survey and measurement content

[0079] 2.1 Yield structure investigation: The yield of yam in each treatment was measured during the harvest period.

[0080] 2.2 Quality determination: The contents of polysaccharides, saponins and flavonoids were determined for the yam tuber samples collected from each treatment.

[0081] 2.3 Determination of functional substances: Determine the components of the added medicinal materials in the yam tubers of each treatment.

[0082] 3. Conclusion

[0083] Table 2 Yield and quality of yam with different treatments

[0084]

[0085] From the above five treatments of yam yield and quality, the dilution range of 20 to 50 times of the flushing fertilizer of the present invention is better in terms of yield, functional quality improvement and cost control. The dilution of 30 times of the flushing fertilizer of the present invention is the best in terms of yield, functional quality improvement and cost control.

[0086] Test Example 3

[0087] This case study examines the effects of different Chinese medicinal materials in the fertilization for enhancing the functional quality of yam according to the present invention.

[0088] 1. Experimental Design

[0089] The experiment was conducted at the Liuhe Experimental Base of Jiangsu Academy of Agricultural Sciences in 2023. The yam variety used for the experiment was Sujie No. 5, and the casing planting method was adopted. According to the different Chinese medicinal materials added in the flushing fertilization, the experiment set up 6 treatments:

[0090] Treatment 1 (Example 1): Chinese medicinal materials are Rehmannia root and Epimedium;

[0091] Treatment 2 (Example 2): Chinese medicinal materials are Chuanxiong and Fructus Aurantii Immaturus;

[0092] Treatment 3 (Example 3): Chinese medicinal materials are Pinellia ternata and lotus leaf;

[0093] Treatment 4 (Example 4): Chinese medicinal materials are Lysimachia chinensis and Phellodendron chinense;

[0094] Treatment 5 (Example 5): Chinese medicinal materials are Astragalus and Anemarrhena;

[0095] Treatment 6 (control): The Chinese medicine solution was replaced with clean water.

[0096] Each treatment of Chinese medicinal materials is a mixture of two Chinese medicinal materials in equal weight ratio.

[0097] The raw materials for flushing fertilizer are mixed in the following proportions by mass: 92 parts of Chinese medicinal material stock solution, 0.6 parts of chitosan, 3 parts of amino acid raw powder, 1.5 parts of EDTA-blended calcium, 1.5 parts of EDTA-blended iron, and 1.4 parts of EDTA-blended zinc.

[0098] The preparation method of flush fertilizer is as follows: first weigh the Chinese medicinal materials, boil them at a ratio of medicine to water of 1:5, boil each portion of the medicinal materials 3 times, each time for 90 minutes, mix and cool the Chinese medicinal liquids obtained after 3 boilings to obtain the Chinese medicinal stock solution, then weigh chitosan, amino acid raw powder, EDTA-boiled calcium, EDTA-boiled iron, and EDTA-boiled zinc in proportion, add the Chinese medicinal stock solution, shake evenly, and make the flush fertilizer.

[0099] The method of using flush fertilizer is: dilute the flush fertilizer 30 times with water, and apply the diluted flush fertilizer liquid directly on the yam tubers and around the root system; flush fertilizer should be used 30 days before yam harvest, once every 10 days, for a total of 3 times, and 1L of diluted flush fertilizer should be applied to each yam each time.

[0100] 2. Survey and measurement content

[0101] 2.1 Yield investigation: The yield of each treatment was measured during the yam harvest period.

[0102] 2.2 Quality determination: Yam tuber samples were collected from each treatment and the contents of polysaccharides, saponins and flavonoids were determined.

[0103] 2.3 Determination of functional substances: Determine the components of the added medicinal materials in the yam tubers of each treatment.

[0104] 3. Conclusion

[0105] Table 3 Yield and quality of yam under different treatments (Examples 1-5)

[0106]

[0107] From the above-mentioned treatments of yam yield, quality and effective ingredients in medicinal materials, the content of functional substances in yam tubers increased to varying degrees compared with the control group using the flushing fertilization of the present invention. The substances in each treatment group were detected by LC-MS technology, and the mass spectrometry data was extracted with reference to the molecular weight of the effective substances in each Chinese medicine prescription, and the components of the added Chinese medicinal materials were detected from the yam tubers.

[0108] In summary, the application of the fertilization method for enhancing the functional quality of yam in the present invention can increase the content of functional substances in yam tubers, increase the functional components in traditional Chinese medicines, enhance the functional quality of yam, and increase the health function of yam.

[0109] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for enhancing the functional quality of yam by fertilization, characterized in that: The following raw materials are included by weight: 90-94 parts of Chinese medicine stock solution, 0.4-0.8 parts of chitosan, 2-4 parts of amino acid raw powder, 3-6 parts of EDTA decoction; The Chinese medicine stock solution is obtained by boiling Chinese medicinal materials, and the Chinese medicinal materials are selected from at least one of the following combinations: a combination of Rehmannia root and Epimedium brevicornum, a combination of Chuanxiong and Fructus Aurantii Immaturus, a combination of Pinellia tuber and Lotus leaf, a combination of Lysimachia scabra and Phellodendron amurense, and a combination of Astragalus membranaceus and Rhizoma Anemarrhenae.

2. The method for applying fertilizer to enhance the functional quality of yam according to claim 1, characterized in that: The EDTA complex consists of EDTA complexed with calcium, EDTA complexed with iron and EDTA complexed with zinc.

3. The method for applying fertilizer to enhance the functional quality of yam according to claim 2, characterized in that: The raw materials are prepared in the following weight proportions: 1.2-1.8 parts of EDTA-calculated calcium, 1.2-1.8 parts of EDTA-calculated iron, and 1.2-1.6 parts of EDTA-calculated zinc; The effective content of Fe in the EDTA chelated iron is ≥13wt%; the effective content of Ca in the EDTA chelated calcium is ≥9.5wt%; the effective content of Zn in the EDTA chelated zinc is ≥14.5wt%.

4. A method for enhancing the functional quality of yam according to any one of claims 1 to 3, characterized in that: A flushing fertilizer for enhancing the functional quality of yam comprises the following raw materials by weight: 92 parts of Chinese medicinal material stock solution, 0.6 parts of chitosan, 3 parts of amino acid raw powder, 1.5 parts of EDTA-blended calcium, 1.5 parts of EDTA-blended iron, and 1.4 parts of EDTA-blended zinc.

5. The method for applying fertilizer to enhance the functional quality of yam according to claim 4, characterized in that: The chitosan has a deacetylation degree of at least 85%; The amino acid raw powder includes the following materials in weight percentage: composite amino acid ≥35wt%, organic matter ≥40wt%, and total nutrients of nitrogen, phosphorus and potassium ≥22wt%.

6. The method for applying fertilizer to enhance the functional quality of yam according to claim 4, characterized in that: In the combination of Rehmannia root and Epimedium brevicornum, Rehmannia root and Epimedium brevicornum are in equal mass ratio; In the combination of Chuanxiong and Fructus Aurantii Immaturus, the weight ratio of Chuanxiong and Fructus Aurantii Immaturus is equal; In the combination of pinellia and lotus leaf, the pinellia and lotus leaf are in equal mass ratio; In the combination of Lysimachia chinensis and Phellodendron chinense, Lysimachia chinensis and Phellodendron chinense are in equal weight ratio; In the combination of Astragalus and Rhizoma Anemarrhenae, Astragalus and Rhizoma Anemarrhenae are in equal weight ratio; The particle size of the Chinese medicinal materials is made smaller than 50 meshes.

7. The method for applying fertilizer to enhance the functional quality of yam according to claim 4, characterized in that: The Chinese medicine stock solution is obtained by the method: weighing the required Chinese medicinal materials, boiling each Chinese medicinal material according to a material-water weight ratio of 1:5-8, boiling each Chinese medicinal material 2-3 times, boiling for 60-90 minutes each time, filtering out each portion of the medicinal liquid and combining them to obtain the Chinese medicine stock solution; preferably, the Chinese medicine stock solution is obtained by the method: weighing the required Chinese medicinal materials, boiling each Chinese medicinal material according to a material-water weight ratio of 1:5, boiling each Chinese medicinal material 2-3 times, boiling for 60-100 minutes each time, filtering out each portion of the medicinal liquid and combining them to obtain the Chinese medicine stock solution; The flushing fertilizer is obtained by weighing the Chinese medicine stock solution, amino acid raw powder and EDTA decoction according to a proportion, mixing and shaking evenly.

8. A method for using flushing fertilizer to enhance the functional quality of yam, characterized in that: The flushing fertilizer according to any one of claims 1 to 7 is diluted and directly flushed or dripped around the yam tuber and / or root system through a special drip irrigation device, so that the yam tuber epidermis and / or most of the root system are soaked in the fertilizer solution.

9. The method for applying fertilizer to enhance the functional quality of yam according to claim 8, characterized in that: The direct flushing is: dilute the flushing fertilizer with water within a range of 10 to 50 times, and then flush it around the yam tubers, and each yam plant is flushed with 1L of the diluted flushing fertilizer each time.

10. The method for applying fertilizer to enhance the functional quality of yam according to claim 8, characterized in that: The flushing fertilizer is applied 30 days before the yam is harvested, and is applied once every 5 to 12 days, for a total of 1 to 5 times; The cultivation technology requirements for the use of flushing fertilizer are as follows: the yam adopts the root-limited substrate cultivation method.

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