Planting method of selenium-rich cherries

Abstract

The invention discloses a planting method of selenium-rich cherries. The planting method comprises the following steps that selenium-containing fertilizer is applied to soil in a flushing mode when tree bodies germinate at the end stage of a dormancy period; in the flowering stage, nitrogen-phosphorus-potassium balanced fertilizer is applied, and the synergist composition and the selenium-enriched nutritional agent are sprayed on leaf surfaces at intervals; and spraying the synergist composition and the selenium-rich nutritional agent on leaf surfaces at intervals for multiple times in a fruit swelling period. The synergist composition disclosed by the invention is prepared from the following components: polyoxyethylene fatty alcohol ether, polyether modified organic silicon, natural plant saponin, chitosan oligosaccharide, alginic acid, hydrolyzed collagen and the like. The selenium content of the cherry fruits cultivated by the method can reach 0.078-0.082 mg / kg, after the cherry fruits are stored for 15 days, the hardness of the fruits is maintained at 65-68.5 N / cm < 2 >, the weight loss rate is controlled at 4.0-4.5%, the rotting rate is controlled at 3.2-3.8%, the retention rate of vitamin C reaches 83-86%, and the storage period is prolonged by 3-4 days compared with that of conventional cultivation. The method is easy to operate, low in cost and high in applicability, and the quality and storage performance of the cherry fruits can be remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of cherry planting, and in particular to a method for planting selenium-enriched cherries. Background Art

[0002] As an important economic fruit tree, cherry currently has a planting area of ​​more than 2 million mu in China, with an annual output value of more than 30 billion yuan, occupying an important position in the fruit market. However, the perishable nature of cherries after harvest seriously restricts the development of the industry. According to statistics, cherries begin to lose water, soften, brown and other quality deterioration phenomena 3-5 days after harvest at room temperature. The rot loss rate during storage is as high as 15-20%, and the quality degradation rate is 25-30%, resulting in huge direct economic losses. Although traditional storage technologies such as refrigeration and controlled atmosphere can delay fruit decay, they require large equipment investment, are costly, and are prone to physiological chilling damage. The use of chemical preservatives faces food safety risks.

[0003] Studies in recent years have found that selenium can significantly enhance the antioxidant capacity of fruit by increasing the activity of antioxidant enzymes such as glutathione peroxidase, delay the fruit aging process, and extend the storage time of cherries.

[0004] The patent application with the authorization number CN201310454682.9 discloses a method for extending the shelf life of cherries, including the following steps: wash the cherries, sterilize them in a 5ml / L ozone solution at 60°C for 1-3min; then quickly cool the cherries to 0-15°C; soak the pre-cooled cherries in the fresh-keeping solution for 1-10min; take out the soaked cherries and store them in a controlled atmosphere storage. The cherries preserved with this product do not need to be washed and can be eaten directly; the cherries are directly rich in selenium, which can be supplemented with selenium as a trace element while tasting delicious food; the storage and fresh-keeping time of the cherries is extended, and the color, crispness and taste of the cherries are basically unchanged; after soaking, the maggots hidden in the cherries can be completely soaked out, solving the problem that has long plagued the industry.

[0005] The above patent prolongs the storage and freshness time of cherries through post-harvest processing. However, due to the barrier effect of the fruit skin, the selenium penetration efficiency is low (only 20-30%) and the distribution is uneven. The temperature and time control requirements of the processing process are strict, which can easily cause skin damage and quality degradation. At the same time, there is a risk of chemical residues. In addition, the investment in professional equipment is large, the operating cost is high, and the loss rate is high, which seriously affects the processing effect and economic benefits. Summary of the invention

[0006] The purpose of the present invention is to provide a method for growing selenium-rich cherries, which is used to solve the problems that the storage and freshness-keeping time of cherries is prolonged by post-harvest treatment in the prior art, but the selenium element permeability is low during post-harvest treatment, the treatment process is easy to damage the fruit quality, there are safety hazards, and the equipment investment and operating costs are high.

[0007] The technical solution adopted by the present invention is as follows: a method for planting selenium-enriched cherries, comprising the following steps:

[0008] (1) At the end of the dormancy period, when the tree begins to sprout, apply selenium-containing fertilizer to the soil. The amount of selenium-containing fertilizer is 15-18 kg / mu, diluted with 500-550 liters of water and evenly irrigated;

[0009] (2) During the flowering stage, nitrogen, phosphorus and potassium balanced fertilizers are applied to the soil, and the foliar synergist composition and selenium-rich nutrient are sprayed at intervals. Specifically, 0.15% synergist composition is first sprayed at a dosage of 80-100 ml / mu, diluted with water to 20-25 liters, and after an interval of 30 minutes, the selenium-rich nutrient is sprayed at a dosage of 200 ml / mu, with a ratio of 1:200-400 to water;

[0010] (3) During the fruit expansion period, treatment is carried out every 7 days. For each treatment, 0.2% synergist composition is first sprayed at a dosage of 100-150 ml / mu, diluted with water to 25-30 liters. After an interval of 30 minutes, selenium-rich nutrient is sprayed at a dosage of 200 ml / mu, with a ratio of 1:200-400 to water. The interval between two treatments is 3-4 days, and the treatment is continued for 4-5 times.

[0011] Furthermore, the formula of the nitrogen, phosphorus and potassium balanced fertilizer is 15-15-15.

[0012] Furthermore, the synergist composition comprises the following components by weight:

[0013] 12 parts of polyoxyethylene fatty alcohol ether;

[0014] 6 parts of polyether modified silicone;

[0015] 4 parts of natural plant saponin;

[0016] Chitosan oligosaccharide 3 parts;

[0017] 1.5 parts of alginic acid;

[0018] 2.5 parts of hydrolyzed collagen;

[0019] 6 parts of glycerol;

[0020] 4 parts of propylene glycol;

[0021] 3 parts of urea;

[0022] Vitamin C 0.15 parts;

[0023] EDTA 0.2 parts;

[0024] 0.1 part of citric acid;

[0025] 0.2 parts of sodium citrate;

[0026] Make up to 100 parts with water.

[0027] Furthermore, the preparation method of the synergist composition comprises:

[0028] (1) Dissolve polyoxyethylene fatty alcohol ether in 30 parts of warm water at 40° C., stir to dissolve, slowly add polyether-modified silicone, stir at 300 r / min for 10 minutes until clear, and add natural plant saponin;

[0029] (2) Take another 20 parts of water, dissolve chitosan oligosaccharide and alginate in turn, then slowly add hydrolyzed collagen, control the temperature not exceeding 45°C, and stir for 15 minutes until uniform;

[0030] (3) mixing glycerol and propylene glycol, adding urea and stirring to dissolve, and mixing with the solution obtained in step (2) and stirring for 10 minutes;

[0031] (4) Add vitamin C and EDTA, adjust the pH to 7.0 with citric acid and sodium citrate, add water to make up to 100 parts, and stir for 30 minutes until uniform.

[0032] Furthermore, the nutritional components of the selenium-enriched nutrient include: organic selenium ≥ 4.5 g / L (in terms of Se), organic matter ≥ 60%, and the organic selenium is in the form of selenite.

[0033] Furthermore, the nutrients of the selenium-containing fertilizer include:

[0034] Water-soluble selenium (Se) ≥ 1000 mg / kg, effective selenium ≥ 850 mg / kg;

[0035] Total nitrogen (N) ≥ 12%, available phosphorus (P2O5) ≥ 8%, water-soluble potassium (K2O) ≥ 10%;

[0036] Magnesium oxide (MgO) ≥ 2.5%, calcium oxide (CaO) ≥ 3.0%, sulfur (S) ≥ 1.5%;

[0037] Iron (Fe) ≥ 0.2%, zinc (Zn) ≥ 0.15%, boron (B) ≥ 0.1%, manganese (Mn) ≥ 0.1%;

[0038] Organic matter content ≥25%, moisture ≤8%, pH value: 6.5-7.5.

[0039] Furthermore, the spraying operations in step (2) and step (3) are carried out on a clear and windless morning between 6:00 and 8:00.

[0040] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0041] The cherry planting method provided by the present invention has significant technical advantages and application value. By adopting selenium-containing fertilizer soil flushing, nitrogen, phosphorus and potassium balanced fertilization, and intermittent foliar spraying of synergist composition and selenium-rich nutrients during the critical growth period, the quality and storage performance of cherry fruits can be significantly improved. Among them, the synergist composition adopts biological raw materials, has good synergistic effect and environmental friendliness; the scientific ratio of selenium-rich nutrients ensures the efficient utilization of nutrients. The treated cherry fruits not only have significantly improved quality indicators such as selenium content and hardness, and the storage period is significantly extended, but also the weight loss rate and decay rate are greatly reduced, and the vitamin C retention rate is significantly improved. At the same time, the method can also improve the effective selenium content in the soil and the nutritional status of the plant leaves, and improve the stress resistance of the plant. DETAILED DESCRIPTION

[0042] A method for planting selenium-enriched cherries comprises the following steps:

[0043] (1) At the end of the dormancy period, when the tree begins to sprout, apply selenium-containing fertilizer to the soil. The amount of selenium-containing fertilizer is 15-18 kg / mu, diluted with 500-550 liters of water and evenly irrigated;

[0044] (2) During the flowering stage, nitrogen, phosphorus and potassium balanced fertilizers are applied to the soil, and the foliar synergist composition and selenium-rich nutrient are sprayed at intervals. Specifically, 0.15% synergist composition is first sprayed at a dosage of 80-100 ml / mu, diluted with water to 20-25 liters, and after an interval of 30 minutes, the selenium-rich nutrient is sprayed at a dosage of 200 ml / mu, with a ratio of 1:200-400 to water;

[0045] (3) During the fruit expansion period, treatment is carried out every 7 days. For each treatment, 0.2% synergist composition is first sprayed at a dosage of 100-150 ml / mu, diluted with water to 25-30 liters. After an interval of 30 minutes, selenium-rich nutrient is sprayed at a dosage of 200 ml / mu, with a ratio of 1:200-400 to water. The interval between two treatments is 3-4 days, and the treatment is continued for 4-5 times.

[0046] As a preferred embodiment, in step 1, the nutrients of the selenium-containing fertilizer include: water-soluble selenium (Se) ≥ 1000 mg / kg, effective selenium ≥ 850 mg / kg; total nitrogen (N) ≥ 12%, effective phosphorus (P2O5) ≥ 8%, water-soluble potassium (K2O) ≥ 10%; magnesium oxide (MgO) ≥ 2.5%, calcium oxide (CaO) ≥ 3.0%, sulfur (S) ≥ 1.5%; iron (Fe) ≥ 0.2%, zinc (Zn) ≥ 0.15%, boron (B) ≥ 0.1%, manganese (Mn) ≥ 0.1%; organic matter content ≥ 25%, moisture ≤ 8%, pH value: 6.5-7.5;

[0047] In step 2, the formula of nitrogen, phosphorus and potassium balanced fertilizer is 15-15-15;

[0048] In step 2 and step 3, the nutrients of the selenium-enriched nutrient include: organic selenium (Se) ≥ 4.5 g / L; organic matter ≥ 60%, and the form of organic selenium is selenite;

[0049] Factors such as soil type, pH and texture can affect the absorption of selenite by cherries. In acidic soils, the chemical form of selenite may change, affecting the efficiency of its absorption by cherry roots. In addition, the presence of other mineral ions in the soil may also compete with selenium ions for absorption sites, reducing the absorption of selenium by cherries, so it is carried out through foliar spraying.

[0050] At present, although inorganic selenium is mostly used in the market, it can also provide selenium for plants, but its application in agricultural production is subject to certain restrictions due to factors such as low absorption rate, low safety and high price. Therefore, organic selenium is used. Selenite, as an organic selenium source, is more compatible with the physiological structure of cherry plants. It can not only be better absorbed and converted by cherry trees, but also has a good slow-release effect, and can sustainably provide selenium for cherry trees. It has high safety and a wide range of use. It is not easy to cause excessive selenium in cherry trees and is friendly to the ecological environment of orchards. Especially in improving the quality of cherries, selenite can effectively improve the nutritional value of the fruit, increase the sugar content, enhance the hardness of the fruit, and extend the storage period. At the same time, it can also enhance the stress resistance of cherry trees and improve their ability to resist diseases and pests. In addition, selenite has good compatibility with other pesticides and fertilizers, and can be used in a variety of ways such as soil application and foliar spraying. It is easy to operate and can be flexibly applied throughout the entire growth cycle of cherries. Moreover, due to its high utilization rate and relatively low price, the overall cost of use is low.

[0051] However, when spraying selenium-rich nutrients on the leaves, there is a layer of cuticle on the surface of cherry leaves. This cuticle can prevent excessive water loss and the invasion of harmful substances from the outside, but it will also hinder the absorption of selenite. The main components of the cuticle are wax and cutin. Organic selenium (selenite) needs to penetrate this barrier to enter the cells inside the leaves. For cherry varieties with thicker cuticles, the absorption efficiency of selenite will be lower.

[0052] Therefore, in order to promote the absorption of selenite by cherries, when spraying selenium-rich nutrients on the cherry leaves, it is necessary to use a synergist to improve the permeability of the leaf cuticle. The synergist includes the following ingredients in parts by weight: 12 parts of polyoxyethylene fatty alcohol ether; 6 parts of polyether modified silicone; 4 parts of natural plant saponin; 3 parts of chitosan oligosaccharide; 1.5 parts of alginic acid; 2.5 parts of hydrolyzed collagen; 6 parts of glycerol; 4 parts of propylene glycol; 3 parts of urea; 0.15 parts of vitamin C; 0.2 parts of EDTA; 0.1 parts of citric acid; 0.2 parts of sodium citrate; water is supplemented to 100 parts;

[0053] When preparing the synergist, the polyoxyethylene fatty alcohol ether is dissolved in 30 parts of warm water at 40°C, and after stirring to dissolve, the polyether-modified silicone is slowly added, and the mixture is stirred at a speed of 300 r / min for 10 minutes until it is clarified, and natural plant saponin is added; another 20 parts of water are taken, chitosan oligosaccharides and alginate are dissolved in sequence, and then hydrolyzed collagen is slowly added, the temperature is controlled not to exceed 45°C, and the mixture is stirred for 15 minutes until it is uniform; glycerin and propylene glycol are mixed, urea is added and stirred to dissolve, and the mixture is mixed and stirred with the above solution for 10 minutes; finally, vitamin C and EDTA are added, the pH is adjusted to 7.0 with citric acid and sodium citrate, water is added to make up to 100 parts, and the mixture is stirred for 30 minutes until it is uniform.

[0054] The synergist contains a variety of functional ingredients, such as polyoxyethylene fatty alcohol ether, polyether modified silicone and other surface active ingredients, which can reduce surface tension and make the solution spread and adhere better on the leaf surface. Chitosan oligosaccharides, alginic acid, hydrolyzed collagen, etc. can provide nutrition for cherries and enhance the immunity and stress resistance of plants. Glycerin and propylene glycol have moisturizing effects, urea provides nitrogen source, vitamin C is antioxidant, EDTA chelates metal ions, citric acid and sodium citrate adjust the pH value to 7.0, which is close to the physiological pH environment of cherry leaves, ensuring the stability of the solution and the absorption of nutrients by cherries.

[0055] Example 1

[0056] Test location: Cherry greenhouse planting base in Yelao Village, Ximafeng Town, Dengta City, Liaoyang City, Liaoning Province;

[0057] Trial period: December 2023-January 2024;

[0058] Test varieties: Mei Zao cherry;

[0059] Control group: managed according to local traditional cultivation methods, only applying 20 kg / mu of 15-15-15 nitrogen, phosphorus and potassium balanced fertilizer to the soil during the flowering period, and no selenium-containing fertilizers or selenium-rich nutrients were applied.

[0060] Specific steps:

[0061] Step 1: On December 2, 2023 (end of dormancy), apply 15 kg / mu of selenium-containing fertilizer to the soil, diluted with 500 liters of water for irrigation;

[0062] Step 2: On December 25, 2023 (flowering period), apply 15-15-15 nitrogen, phosphorus and potassium balanced fertilizer 20 kg / mu to the soil. At 6:00 am on the same day, spray 0.15% synergist composition (90 ml / mu, diluted to 22 liters), and at 6:30 spray selenium-rich nutrient (200 ml / mu, 1:300 ratio). Selenium-rich nutrient ingredients: organic selenium 4.8g / L, organic matter 65%;

[0063] Step 3: Starting from January 2, 2024, treatment will be carried out every 7 days, spraying 0.2% synergist composition (120 ml / mu, diluted to 28 liters) at 6:00 each time, and spraying selenium-rich nutrient (200 ml / mu, 1:300 ratio) at 6:30, with an interval of 3 days, for a total of 5 times.

[0064] Storage results (under 4°C refrigeration):

[0065] Fruit hardness: The fruit hardness of the treatment group after 15 days of storage was 68.5N / cm 2 , 12% higher than the control group;

[0066] Weight loss rate: After 15 days, the weight loss rate of the treatment group was 4.2%, and that of the control group was 5.8%;

[0067] Decay rate: The decay rate of the treatment group was 3.5% after 15 days, significantly lower than 6.8% of the control group;

[0068] Soluble solids: after 15 days, the treatment group decreased by 0.8°Brix, and the control group decreased by 1.5°Brix;

[0069] Vitamin C content: after 15 days, the retention rate of the treatment group was 85%, while that of the control group was 72%;

[0070] Shelf life: The treated group was 3-4 days longer than the control group.

[0071] Example 2

[0072] Test location: Cherry greenhouse planting base in Yelao Village, Ximafeng Town, Dengta City, Liaoyang City, Liaoning Province;

[0073] Trial period: December 2023-January 2024;

[0074] Test varieties: Mei Zao cherry;

[0075] Control group: managed according to local traditional cultivation methods, only applying 20 kg / mu of 15-15-15 nitrogen, phosphorus and potassium balanced fertilizer to the soil during the flowering period, and no selenium-containing fertilizers or selenium-rich nutrients were applied.

[0076] Specific steps:

[0077] Step 1: On December 5, 2023 (end of dormancy), apply 18 kg / mu of selenium-containing fertilizer to the soil, diluted with 550 liters of water for irrigation;

[0078] Step 2: On December 28, 2023 (flowering period), apply 15-15-15 nitrogen, phosphorus and potassium balanced fertilizer 25 kg / mu to the soil. At 6:30 am on the same day, spray 0.15% synergist composition (85 ml / mu, diluted to 20 liters), and at 7:00 spray selenium-rich nutrient (200 ml / mu, 1:250 ratio). Selenium-rich nutrient ingredients: organic selenium 4.6g / L, organic matter 62%;

[0079] Step 3: Starting from January 5, 2024, treatment will be carried out every 7 days, spraying 0.2% synergist composition (110 ml / mu, diluted to 25 liters) at 6:30 each time, and spraying selenium-rich nutrient (200 ml / mu, 1:250 ratio) at 7:00, with an interval of 4 days, for a total of 4 times.

[0080] Storage results (under 4°C refrigeration):

[0081] Fruit hardness: The fruit hardness of the treatment group after 15 days of storage was 65.8N / cm 2 , 10.5% higher than the control group

[0082] Weight loss rate: After 15 days, the weight loss rate of the treatment group was 4.5%, and that of the control group was 6.2%

[0083] Decay rate: The decay rate of the treated group was 3.8% after 15 days, significantly lower than the 7.2% of the control group.

[0084] Soluble solids: After 15 days, the treatment group decreased by 0.9°Brix, and the control group decreased by 1.6°Brix

[0085] Vitamin C content: After 15 days, the retention rate of the treatment group was 83%, and that of the control group was 70%.

[0086] Shelf life: The treated group was 3 days longer than the control group.

[0087] Example 3

[0088] Test location: Cherry greenhouse planting base in Yelao Village, Ximafeng Town, Dengta City, Liaoyang City, Liaoning Province;

[0089] Trial period: December 2023-January 2024;

[0090] Test varieties: Russian cherry;

[0091] Control group: managed according to local traditional cultivation methods, only applying 20 kg / mu of 15-15-15 nitrogen, phosphorus and potassium balanced fertilizer to the soil during the flowering period, and no selenium-containing fertilizers or selenium-rich nutrients were applied.

[0092] Specific steps:

[0093] Step 1: On December 3, 2023 (end of dormancy), apply 16 kg / mu of selenium-containing fertilizer to the soil, dilute with 520 liters of water for irrigation;

[0094] Step 2: On December 26, 2023 (flowering period), apply 15-15-15 nitrogen, phosphorus and potassium balanced fertilizer 22 kg / mu to the soil. At 6:15 am on the same day, spray 0.15% synergist composition (95 ml / mu, diluted to 23 liters), and at 6:45 spray selenium-rich nutrient (200 ml / mu, 1:350 ratio). Selenium-rich nutrient ingredients: organic selenium 4.7g / L, organic matter 63%;

[0095] Step 3: Starting from January 3, 2024, treatment will be carried out every 7 days, spraying 0.2% synergist composition (130 ml / mu, diluted to 30 liters) at 6:15 each time, and spraying selenium-rich nutrient (200 ml / mu, 1:350 ratio) at 6:45, with an interval of 3 days, for a total of 5 times.

[0096] Storage results (under 4°C refrigeration):

[0097] Fruit hardness: The fruit hardness of the treatment group after 15 days of storage was 67.2N / cm 2 , 11.5% higher than the control group;

[0098] Weight loss rate: After 15 days, the weight loss rate of the treatment group was 4.0%, and that of the control group was 5.5%;

[0099] Decay rate: The decay rate of the treatment group was 3.2% after 15 days, significantly lower than 6.5% of the control group;

[0100] Soluble solids: after 15 days, the treatment group decreased by 0.7°Brix, while the control group decreased by 1.4°Brix;

[0101] Vitamin C content: after 15 days, the retention rate of the treatment group was 86%, while that of the control group was 73%;

[0102] Shelf life: The treated group was 4 days longer than the control group.

[0103] The comprehensive analysis of the test results of the three examples showed that selenium-enriched treatment significantly improved the storage performance and commercial value of cherry fruits: in terms of storage quality, the hardness of the fruits in the treatment group was maintained at 65-68.5N / cm 2 The content of selenium in the treated group was 3-4 days higher than that in the control group, 10-12% higher than that in the control group, the weight loss rate was reduced to 4.0-4.5%, and the decay rate was significantly reduced to 3.2-3.8%. This was mainly due to the fact that selenium improved the stability of the fruit cell membrane, enhanced the antioxidant capacity of the fruit, and improved the fruit tissue structure. In terms of economic benefits, the storage period of the fruit in the treated group was extended by 3-4 days, the decay rate was reduced by about 45% compared with the control group, the retention rate of nutrients such as soluble solids and vitamin C was higher, and the shelf life was longer, which not only provided greater time flexibility for the sales link, but also significantly reduced storage losses, improved market competitiveness, and had significant economic benefits and promotion value.

[0104] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A method for planting selenium-enriched cherries, characterized in that: The following steps are involved: (1) At the end of the dormancy period, when the tree begins to sprout, apply selenium-containing fertilizer to the soil. The amount of selenium-containing fertilizer is 15-18 kg / mu, diluted with 500-550 liters of water and evenly irrigated; (2) During the flowering stage, nitrogen, phosphorus and potassium balanced fertilizers are applied to the soil, and the foliar synergist composition and selenium-rich nutrient are sprayed at intervals. Specifically, 0.15% synergist composition is first sprayed at a dosage of 80-100 ml / mu, diluted with water to 20-25 liters, and after an interval of 30 minutes, the selenium-rich nutrient is sprayed at a dosage of 200 ml / mu, with a ratio of 1:200-400 to water; (3) During the fruit expansion period, treatment is carried out every 7 days. For each treatment, 0.2% synergist composition is first sprayed at a dosage of 100-150 ml / mu, diluted with water to 25-30 liters. After an interval of 30 minutes, selenium-rich nutrient is sprayed at a dosage of 200 ml / mu, with a ratio of 1:200-400 to water. The interval between two treatments is 3-4 days, and the treatment is continued for 4-5 times.

2. The method for planting selenium-enriched cherries according to claim 5, characterized in that: The formula of the nitrogen, phosphorus and potassium balanced fertilizer is 15-15-15.

3. The method for planting selenium-enriched cherries according to claim 1, characterized in that: The synergist composition comprises the following components by weight: 12 parts of polyoxyethylene fatty alcohol ether; 6 parts of polyether modified silicone; 4 parts of natural plant saponin; Chitosan oligosaccharide 3 parts; 1.5 parts of alginic acid; 2.5 parts of hydrolyzed collagen; 6 parts of glycerol; 4 parts of propylene glycol; 3 parts of urea; Vitamin C 0.15 parts; EDTA 0.2 parts; 0.1 part of citric acid; 0.2 parts of sodium citrate; Make up to 100 parts with water.

4. The method for planting selenium-enriched cherries according to claim 2, characterized in that: The preparation method of the synergist composition comprises: (1) Dissolve polyoxyethylene fatty alcohol ether in 30 parts of warm water at 40° C., stir to dissolve, slowly add polyether-modified silicone, stir at 300 r / min for 10 minutes until clear, and add natural plant saponin; (2) Take another 20 parts of water, dissolve chitosan oligosaccharide and alginate in turn, then slowly add hydrolyzed collagen, control the temperature not exceeding 45°C, and stir for 15 minutes until uniform; (3) mixing glycerol and propylene glycol, adding urea and stirring to dissolve, and mixing with the solution obtained in step (2) and stirring for 10 minutes; (4) Add vitamin C and EDTA, adjust the pH to 7.0 with citric acid and sodium citrate, add water to make up to 100 parts, and stir for 30 minutes until uniform.

5. The method for planting selenium-enriched cherries according to claim 1, characterized in that: The nutritional components of the selenium-enriched nutrient include: organic selenium ≥4.5 g / L (in terms of Se), organic matter ≥60%, and the form of organic selenium is selenite.

6. The method for planting selenium-enriched cherries according to claim 1, characterized in that: The nutrients of the selenium-containing fertilizer include: Water-soluble selenium (Se) ≥ 1000 mg / kg, effective selenium ≥ 850 mg / kg; Total nitrogen (N) ≥ 12%, available phosphorus (P2O5) ≥ 8%, water-soluble potassium (K2O) ≥ 10%; Magnesium oxide (MgO) ≥ 2.5%, calcium oxide (CaO) ≥ 3.0%, sulfur (S) ≥ 1.5%; Iron (Fe) ≥ 0.2%, zinc (Zn) ≥ 0.15%, boron (B) ≥ 0.1%, manganese (Mn) ≥ 0.1%; Organic matter content ≥25%, moisture ≤8%, pH value: 6.5-7.

5.

7. The method for planting selenium-enriched cherries according to claim 1, characterized in that: The spraying operation in step (2) and step (3) is carried out between 6:00 and 8:00 in the morning on a clear and windless day.