Seed dressing formula and method for improving survival rate of soybean seedling culture and seedling culture device

Abstract

According to the method for improving the soybean seedling survival rate and the seedling device, the activity of soybean rhizobium can be enhanced through the formula, formation and growth of root nodules are promoted, the nitrogen content of plants is increased, absorption and activation of phosphorus are promoted, the breathing intensity and the activity of some enzymes are improved, and therefore growth and development of soybeans are promoted; compared with a control group, the yield is increased by 14% when the seeds are soaked in a mixed solution of ammonium molybdate and rhizobium japonicum for 6 hours; l methionine can promote soybean rooting and increase the root length, the root number and the root weight, and after soybean seeds are soaked with 10 mg / L methionine, the root length, the root number and the root weight are increased by 41.5%, 29.4% and 35.6% respectively compared with a control group; the root length, the root number and the root weight of the soybean seeds treated by the formula and the method are greatly improved, and the formula and the method are very beneficial to subsequent transplanting and growth. The seedling raising device can ensure that soybean seedlings are at a proper temperature, moisture is automatically regulated, and seedling raising is simple and practical.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of seedling cultivation, and particularly relates to a method for improving the survival rate of soybean seedlings and a seedling device. BACKGROUND

[0002] Soybean (Latin name: Glycine max (Linn.) Merr.), as an important annual herbaceous plant of the genus Glycine in the Leguminosae family, has been widely planted and utilized globally since ancient times. Its unique nutritional value and extensive application fields have earned it the titles of "King of Beans", "Meat in the Field", and "Green Cow Milk", which fully demonstrate the important position of soybean in grain and oil crops.

[0003] However, despite the many advantages of soybean, its cultivation in traditional cultivation methods faces many challenges. The traditional cultivation method is to directly sow soybean seeds in the field. The biggest disadvantage of this method is the uncontrollability of the external environment. Due to weather changes, soil conditions, and various factors such as pests and diseases, the germination rate of seeds is often difficult to guarantee. At the same time, direct sowing also makes soybean seeds vulnerable to bird and insect damage, further reducing seed germination rate and survival rate. These problems not only result in low and uneven emergence, but also seriously affect the growth cycle and yield of soybean. Especially in the aspect of crop succession, due to the uncertainty of emergence time, it will cause inconvenience in subsequent agricultural operations. At the same time, the traditional seedling device needs manual operation when covering the film, which makes the film covering slow, the cycle long, and the labor cost high, and the effect of temperature and humidity preservation is not strong, which still has defects to some extent.

[0004] Therefore, a method for improving the survival rate of soybean seedlings and a seedling device are needed to solve the above technical problems. SUMMARY

[0005] In order to solve the above technical problems, the present application designs a method for improving the survival rate of soybean seedlings and a seedling device. Through this cultivation method, uniform, full, and strong seedlings can be cultivated, and the growth quality and yield of soybean can be improved. Compared with traditional cultivation methods, this new technology not only shortens the emergence time, but also makes the transplanted soybean seedlings have no hardening-off period, has good uniformity and developed root system, has the advantages of convenient water and fertilizer management during the seedling stage, conducive to the cultivation of strong seedlings, improvement of seedling rate, and regulation of sowing period. At the same time, due to the effective insect and bird prevention measures taken during the seedling process and the establishment of an automated greenhouse, the damage of pests and birds during the seedling stage is greatly reduced.

[0006] In order to achieve the above technical effects, the present application discloses a seed dressing formula for improving the survival rate of soybean seedlings, which comprises: 0.5-2 kg of soybean nodule bacteria solution, 10-30 g of ammonium molybdate, 0.5-2 g of L-methionine, and 40-60 kg of water.

[0007] Further, the seed dressing formula comprises: 1 kg of soybean rhizobium solution, 25 kg of ammonium molybdate, 1 g of L-methionine, and 50 kg of water;

[0008] A method for improving the survival rate of soybean seedlings, comprising the following steps:

[0009] S1: selecting a seedling site to construct a seedling device and a seedling pool, and configuring a nutrient solution to inject into the seedling pool;

[0010] S2: configuring nutrient soil and loading into a seedling tray;

[0011] S3: before sowing, first performing seed dressing treatment, and during seed dressing, configuring a seed soaking solution by adding 1 kg of 300 million soybean rhizobium solution per milliliter, 25 g of ammonium molybdate, 1 g of L-methionine into 50 kg of water, and soaking the selected and impurity-removed soybean seeds for 4-8 hours;

[0012] S4: then filtering and drying the soaked soybean seeds, and then coating the soybean seeds with 6.25% fludioxonil·metalaxyl-M suspension seed coating agent (Jingge) before sowing;

[0013] S5: sowing the seed-dressed soybean seeds in the seedling tray by using a sowing device or manually, and placing the seedling tray in the seedling pool and in the seedling device, wherein the temperature in the seedling device should be maintained at 15-30°C, and the temperature should not exceed 30°C; during a sunny day, the film should be timely removed for ventilation and cooling from 10 am to 5 pm, and the film should be timely covered for heat preservation after 5 pm;

[0014] S6: after germination, performing thinning when the soybean seedlings grow to 2 leaves and 1 heart, and leaving 2 seedlings per hole; after 3 leaves, starting to train the seedlings by sequentially and gradually removing the film at both ends and both sides, and spraying 5% potassium dihydrogen phosphate foliar fertilizer;

[0015] S7: timely transplanting the soybean seedlings when the soybean seedlings are 4-5 leaves old, and selecting an overcast day for transplanting, and covering the soybean seedlings with soil after the soybean seedlings are straightened in the nest; and after 15-20 days of transplanting, the soybean seedlings are formed.

[0016] Further, in S1, a place with the following conditions is selected to construct the seedling device and the seedling pool: avoiding wind and facing the sun, convenient transportation, close to water source, flat terrain, low underground water level, and fast ground temperature recovery; the seedling pool is constructed by opening a box, each standard box of the seedling pool is 8-12 m long, 1-1.5 m wide, 0.1-0.3 m deep, and 0.25-0.4 m wide in the middle walkway, and the pool is paved with 0.16 mm thick polyvinyl chloride film, and before paving the film, long-acting insecticides such as purple dan or enemy ke are applied to prevent underground pests from biting the film and causing water leakage.

[0017] Further, in the S2, the configuration method of the nutrient soil is that: according to percentage, the proportion of husks is 30%, the proportion of dry livestock and poultry manure is 20%, the proportion of fine soil is 49.9%, and the proportion of urea is 0.1%, the materials are stacked in the above proportions, a fermenting agent is added, and the nutrient soil is prepared after fermentation for 4-5 months.

[0018] Further, in the S2, the configuration method of the nutrient liquid is that:

[0019] S1.1: injecting qualified agricultural production water into the seedling pond, and controlling the water layer depth of the seedling pond to be 5-10 cm;

[0020] S1.2: when the water layer depth is 5 cm, 100 g of compound fertilizer (N:P2O5:K2O=15:15:15), 25 g of magnesium sulfate (to prevent algae growth in the pond), and 50 g of 1000 billion spores / g bacillus subtilis are applied per square meter of the seedling pond, and every time the water layer is deepened by 1 cm, 20 g of compound fertilizer, 5 g of magnesium sulfate, and 10 g of bacillus subtilis are added per square meter, and the water layer depth is controlled to be within 10 cm.

[0021] On the other hand, the application discloses a seedling raising device for improving the survival rate of soybean seedlings, comprising: a main frame, a film, and a pulling device; the main frame is in an arch structure, outer side rails are fixedly installed on the front and back sides of the main frame, and the pulling device is movably installed on the outer side rails; a support plate is fixedly installed at the lower end of the side wall of the main frame, support blocks are symmetrically installed on the upper end of the support plate, a winding drum is detachably installed on the support blocks, and the film is wound on the winding drum.

[0022] The pulling device comprises: a pulling main body, an inner baffle, a vertical plate, a fixing knob, a support column, and a wheel; the support column is fixedly installed around the lower end of the pulling main body, the wheel is movably installed on the support column, and the wheel is clamped on the outer side rail; the inner baffle is fixedly installed on the inner side of the side wall of the pulling main body, the vertical plates are linearly arrayed on the side wall of the pulling main body corresponding to the inner baffle, and the outermost vertical plate is provided with the fixing knob; the film is automatically covered by repeatedly winding the film up and down on the gaps between the vertical plates and fixing the film by the fixing knob.

[0023] Further, the upper end of the support block is fixedly installed with the winding drum by bolts; and doors are installed on the end faces of the main frame.

[0024] Further, the length of the main frame is 20-30 m, the width is 6-10 m, and the top height is 3-4 m.

[0025] The application has the following beneficial effects:

[0026] The application discloses a seed dressing formula and method for improving soybean seedling survival rate, and the formula can strengthen the activity of soybean rhizobium, promote the formation and growth of rhizobium, increase the nitrogen content of plants, promote the absorption and activation of phosphorus, improve the respiration intensity and the activity of some enzymes, and promote the growth and development of soybean; the seed treated by the mixed solution of ammonium molybdate and soybean rhizobium for 6 hours has a yield increase of 14% compared with the control; L-methionine can promote the rooting of soybean and improve the root length, root number and root weight; after the soybean seeds are treated by 10 mg / L L-methionine, the root length, root number and root weight are increased by 41.5%, 29.4% and 35.6% respectively compared with the control; the root length, root number and root weight of the soybean seeds treated by the formula and method are greatly improved, which is very beneficial to the subsequent transplanting and growth.

[0027] In addition, the application discloses a seedling raising device for improving the survival rate of soybean seedlings, which comprises a main frame, a film and a pulling device. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used for the embodiment description.

[0029] Figure 1 It is a whole structure schematic diagram of the seedling raising device for improving the survival rate of soybean seedlings;

[0030] Figure 2 It is a whole structure schematic diagram of the seedling raising device for improving the survival rate of soybean seedlings after removing the film;

[0031] Figure 3 It is a front view of the seedling raising device for improving the survival rate of soybean seedlings;

[0032] Figure 4 It is another whole structure schematic diagram of the seedling raising device for improving the survival rate of soybean seedlings after removing the film;

[0033] Figure 5 It is an enlarged schematic diagram of A of the seedling raising device for improving the survival rate of soybean seedlings;

[0034] Figure 6 It is a structure schematic diagram of the pulling device of the seedling raising device for improving the survival rate of soybean seedlings.

[0035] The components represented by the reference numbers in the drawings are listed as follows:

[0036] 1 - main body frame, 11 - support plate, 111 - support block, 112 - round hole, 113 - fixing bolt, 12 - outer slide rail, 13 - door, 2 - film, 3 - pulling device, 31 - pulling body, 32 - inner baffle, 33 - vertical plate, 34 - fixing knob, 35 - support column, 36 - wheel, 4 - winding drum. DETAILED DESCRIPTION

[0037] Example 1

[0038] A seed dressing formula for improving soybean seedling survival rate, comprising: 0.5-2 kg of soybean rhizobium solution, 0.01-0.03 kg of ammonium molybdate, 0.5-2 g of L-methionine, and 40-60 kg of water; the specific usage is: 1 kg of 3 billion soybean rhizobium solution, 25 g of ammonium molybdate, 1 g of L-methionine, and 50 kg of water; and the above are mixed to prepare a corresponding seed soaking solution for standby; a specific method for improving soybean seedling survival rate, comprising the following steps:

[0039] S1: Selecting a seedling site and building seedling devices and seedling pools; the seedling site is selected to be wind-avoiding and sun-facing, convenient for transportation, close to water source, flat, low in underground water level, and fast in ground temperature recovery; the seedling pool is brick-laid, 4 seedling pools are built in each standard seedling device, each seedling pool is 24 m long, 1.4 m wide, and 0.2 m deep, a 0.25 m wide walkway is arranged between the seedling pools. The pool bottom bed soil should be leveled and rammed to be horizontal and not concave, and a whole piece of 0.18 mm (18 silk) polyvinyl chloride film is laid inside;

[0040] S2: Preparing nutrient soil and nutrient solution and selecting corresponding seedling trays; the process of preparing nutrient soil is: according to the proportion of 30% of husks, 20% of dry livestock and poultry manure, 49.9% of fine soil, and 0.1% of urea, the materials are stacked, a fermenting agent is added, and the nutrient soil is fermented for 4-5 months to prepare the nutrient soil, which is then loaded into the seedling tray for standby. When preparing the nutrient solution, standard agricultural production water is put into the nutrient pool, and the water layer depth of the seedling pool is controlled to be 5-10 cm. When the water layer depth is 5 cm, 100 g of compound fertilizer (N:P2O5:K2O=15:15:15) and 25 g of magnesium sulfate (to prevent algae growth in the pool) per square meter of the seedling pool are applied, and 50 g of 1000 billion spores / g bacillus subtilis (to biologically control bacterial and fungal contamination of the nutrient pool) is applied. For every 1 cm increase in water layer depth, 20 g of compound fertilizer, 5 g of magnesium sulfate, and 10 g of bacillus subtilis per square meter are added, and the water layer depth reaches 10 cm. (Note: The addition of magnesium sulfate and bacillus subtilis in the nutrient solution is the key to ensuring that the nutrient solution does not deteriorate and the fertilizer efficiency is exerted.)

[0041] S3: Before sowing, first carry on the seed dressing treatment, when seed dressing, according to 1 kg 300 million / milliliter soybean rhizobium solution, 25 g ammonium molybdate, 1 g L methionine is added in 50 kg water configuration seed soaking solution, and the impurity soybean is soaked for 4 ~ 8 hours.

[0042] S4: After that, the soaked soybean is filtered and dried, and then coated with 6.25% fludioxonil · precise mefenoxam suspension seed coating (Jing Ge) before sowing;

[0043] S5: Use the seed sowing device or artificial seed sowing device to sow the seed in the seedling tray, 2-3 seeds per hole, fill the hole with nutrient soil after sowing, and then place the seedling tray in the seedling pool and the seedling device, the temperature in the seedling device should be kept between 15-30℃, and the temperature should not exceed 30℃. The film should be opened for ventilation and cooling from 10 am to 5 pm every day, and the film should be covered again after 5 pm.

[0044] S6: After germination, when the seedling reaches 2 leaves and 1 heart, thinning is carried out, and 2 seedlings per hole are left; after 3 leaves, acclimatization is started, and the film on both sides is gradually opened for acclimatization, and 5% potassium dihydrogen phosphate foliar fertilizer is sprayed; to improve the stress resistance and transplanting survival rate of soybean seedlings. When acclimatizing, pay attention to the soybean seedlings wilting slightly at noon, and recovering naturally in the morning and evening.

[0045] S7: When the soybean seedling is 4-5 leaves old, transplanting is carried out in time, and the soybean seedling is transplanted in the shade, and the soil is covered after the seedling is straightened; 15-20 days after transplanting, the seedling is formed.

[0046] In order to further verify the germination of soybean treated by the above method, the germination rate, survival rate and yield of soybean after germination, sowing and transplanting are counted and observed; the specific data is shown in Table 1 as follows:

[0047] Table 1 Comparison of survival rate and yield after direct sowing and treated sowing

[0048] From the above table, it can be seen that the germination rate, survival rate and yield after treatment by the above formula and method have very obvious effect, and the yield is increased by 38.7 kg compared with the traditional direct sowing method, which can be directly observed that the effect is significant;

[0049] In addition, in this embodiment, the root length, root number and root weight of the soybean treated by the traditional direct sowing method are compared, and the specific data is shown in Table 2 as follows:

[0050] Table 2 Effect of L-methionine seed soaking on soybean seedling (4 leaf age) root growth

[0051] Note: Capital letters represent 1% extremely significant level, lowercase letters represent 5% significant level.

[0052] From the above table 2, after the soybean seeds are treated by soaking with 20 mg / L L-methionine, the root length and root weight of the soybean seedlings are increased by 18.3% and 19% respectively compared with the direct sowing group. When L-methionine is more than 20 mg / L, the root length and root weight of the soybean seedlings have no significant change. It is shown that the root length and root weight of the soybean seedlings treated by the method are significantly improved compared with the non-treated.

[0053] Example 2

[0054] In this embodiment, the influence of seed soaking solution prepared by different formula combinations on the emergence and yield of soybean is further verified, and specifically:

[0055] S1: Select a seedling site and build a good seedling device and seedling pool. The seedling site is selected to be windward and sunny, convenient for transportation, close to water source, flat, low underground water level, and fast ground temperature recovery. The seedling pool is brick-laid, and 4 seedling pools are built in each standard seedling device, each with a length of 24 m, a width of 1.4 m, and a depth of 0.2 m. A 0.25 m wide walkway is provided between the seedling pools. The pool bottom bed soil should be leveled and rammed to keep it level and not concave, and a whole piece of 0.18 mm (18 silk) polyvinyl chloride film is laid inside.

[0056] S2: Configure nutrient soil and nutrient solution and select the corresponding seedling tray. The process of configuring nutrient soil is as follows: according to the proportion of 30% of chaff, 20% of dry livestock and poultry manure, 49.9% of fine soil, and 0.1% of urea, the materials are stacked, and a fermentation agent is added for fermentation for 4-5 months to make nutrient soil, which is then loaded into the seedling tray for standby. When configuring nutrient solution, put qualified agricultural production water into the nutrient pool, and control the water depth of the seedling pool to be 8 cm. When the water depth is 5 cm, apply 100 g of compound fertilizer (N:P2O5:K2O=15:15:15) per square meter of seedling pool, 25 g of magnesium sulfate (to prevent algae growth in the pool), and 50 g of 1000 billion spores / g of bacillus subtilis (to prevent bacterial and fungal contamination of the nutrient pool) per square meter of seedling pool. For every 1 cm increase in water depth, add 20 g of compound fertilizer, 5 g of magnesium sulfate, and 10 g of bacillus subtilis per square meter. When the water depth reaches 10 cm, it is ready (Note: the addition of magnesium sulfate and bacillus subtilis in the nutrient solution is the key to ensuring that the nutrient solution does not deteriorate and the fertilizer effect is fully utilized).

[0057] S3: Before sowing, the seeds are treated by soaking, and 1 kg of 300 million soybean rhizobium solution, 25 g of ammonium molybdate, and 1 g of L-methionine are added to 50 kg of water to configure the seed soaking solution, and the impure soybean seeds are soaked for 6 hours.

[0058] S4: After soaking, the soybean is filtered and dried, and then coated with 6.25% fludioxonil·metalaxyl-M flowable concentrate (Jingge) before sowing;

[0059] S5: The treated soybean seeds are sown in the seedling tray with 2-3 seeds per hole using a seeder or manually. The holes are filled with nutrient soil, and the seedling tray is placed in the seedling device, with the temperature maintained at 25°C. The film should be removed for ventilation and cooling from 10 am to 5 pm, and then covered again for heat preservation.

[0060] S6: After germination, thinning is performed when the seedlings reach 2 leaves and 1 heart, leaving 2 seedlings per hole. After 3 leaves, the seedlings are gradually acclimated by removing the film on both ends and sides, and spraying 5% potassium dihydrogen phosphate foliar fertilizer to improve the stress resistance and transplanting survival rate of soybean seedlings. During acclimation, attention should be paid to the soybean seedlings wilting slightly at noon and recovering naturally in the morning and evening.

[0061] S7: The soybean seedlings are transplanted when they are 4-5 leaves old, preferably on a cloudy day. The seedlings are covered with soil after being straightened in the nest, and the seedlings are formed after 15-20 days.

[0062] Example 3

[0063] Before sowing, the seeds are treated with 1 kg of 300 million / ml soybean rhizobium solution and 25 g of molybdenum ammonium added to 50 kg of water to prepare the soaking solution group, and the selected and cleaned soybean seeds are soaked for 6 hours.

[0064] Example 4

[0065] Before sowing, the seeds are treated with 1 kg of 300 million / ml soybean rhizobium solution and 1 g of L-methionine added to 50 kg of water to prepare the soaking solution group, and the selected and cleaned soybean seeds are soaked for 6 hours.

[0066] Example 5

[0067] Before sowing, the seeds are treated with 25 g of molybdenum ammonium and 1 g of L-methionine added to 50 kg of water to prepare the soaking solution group, and the selected and cleaned soybean seeds are soaked for 6 hours.

[0068] Example 6

[0069] Before sowing, the seeds are treated with 1 kg of 300 million / ml soybean rhizobium solution added to 50 kg of water to prepare the soaking solution group, and the selected and cleaned soybean seeds are soaked for 6 hours.

[0070] Example 7

[0071] Before sowing, seed dressing treatment is carried out, and 25 g of ammonium molybdate is added to 50 kg of water to configure the seed soaking solution group, and the selected impurity-free beans are soaked for 6 hours.

[0072] Example 8

[0073] Before sowing, seed dressing treatment is carried out, and 1 g of L-methionine is added to 50 kg of water to configure the seed soaking solution group, and the selected impurity-free beans are soaked for 6 hours.

[0074] The rest of the processes of the above examples 3-8 are the same as those of example 2, and a direct sowing group (as a blank control) is additionally added; the survival rate and the final yield per mu of the beans cultivated from the seed soaking solution groups obtained through the above examples are monitored and recorded, and the specific conditions are shown in Table 3:

[0075] Table 3: Influence of seed soaking solution dressing treatment with different formula combinations on soybean emergence and yield

[0076] Note: Capital letters represent 1% extremely significant level, and lowercase letters represent 5% significant level.

[0077] From the above table, it can be seen that the use of 1 kg of 300 million / milliliter of soybean nodule bacteria solution or 25 g of ammonium molybdate added to 50 kg of water to configure the seed soaking solution dressing treatment alone does not improve the survival rate of soybean seed germination relative to the blank control, and the use of 1 g of L-methionine added to 50 kg of water to configure the seed soaking solution dressing treatment alone does not improve the yield per mu of soybean production relative to the blank control. However, after using the full formula, the survival rate of soybean seed germination is improved by 16.7 percentage points relative to the blank control, and the yield per mu of soybean production is improved by 19.2% relative to the blank control. It is shown that the formula in the present application greatly improves the survival rate and yield per mu of soybeans through the mutual synergistic effect of methionine, ammonium molybdate and soybean nodule bacteria solution.

[0078] Example 3

[0079] Based on the seedling raising device described in embodiment 1, specifically disclosed in the present embodiment is a seedling raising device for improving the survival rate of soybean seedling raising, comprising: a main frame 1, a film 2, a pulling device 3; the main frame 1 is an arch-shaped structure, and outer side rails 12 are fixedly installed on the front and back sides of the main frame 1, and the pulling device 3 is movably installed on the outer side rails 12; a support plate 11 is fixedly installed at the lower end of the side wall of the main frame 1, support blocks 111 are symmetrically installed on the upper end of the support plate 11, a winding drum 4 is detachably installed on the support blocks 111, and the film 2 is wound on the winding drum 4; the length of the main frame 1 is 20-30 m, the width is 6-10 m, and the top height is 3-4 m. Specifically, the pulling device 3 comprises: a pulling main body 31, an inner baffle 32, a vertical plate 33, a fixed knob 34, a support column 35, and a wheel 36; the support column 35 is fixedly installed around the lower end of the pulling main body 31, the wheel 36 is movably installed on the support column 35, and the wheel 36 is clamped on the outer side rail 12; the inner baffle 32 is fixedly installed on the inner side of the side wall of the pulling main body 31, the vertical plates 33 are linearly arrayed on the side wall of the pulling main body 31 corresponding to the inner baffle 32, and the outermost vertical plate 33 is provided with the fixed knob 34; the film 2 is automatically covered by repeatedly winding the film 2 up and down on the gap between the vertical plates 33 and fixing the film 2 by the fixed knob 34, and specifically the head end of the film 2 can be sequentially wound on the gap between the vertical plates 33 to ensure stability, and then the film 2 is fixed by the fixed knob 34 provided to ensure the stability of subsequent movement; the film 2 can be automatically covered by the pulling mechanism provided, which can replace the traditional manual way of covering the film 2, and then the film 2 can be raised as needed to ensure the suitability of the internal temperature.

[0080] In addition, in the present embodiment, the winding drum 4 is fixedly installed on the support block 111 by a bolt 113 at the upper end of the support block 111; doors 13 are installed on the end faces of the main frame 1, and a motor is provided on the winding drum 4, which is used to release or wind the film 2 by forward or reverse rotation, and needs to cooperate with the pulling device 3 to pull the film 2.

[0081] The preferred embodiments of the application disclosed above are only used to help explain the application, and the preferred embodiments do not describe all the details and limit the application to the specific embodiments described.

Claims

1. A seed dressing formulation for improving soybean seedling survival, characterized in that, It comprises: soybean rhizobium solution 0.5~2kg, ammonium molybdate 10~30 g, 0.5~2 g L methionine, 40-60 kg water. The seed dressing formula comprises: soybean rhizobium solution 1 kg, ammonium molybdate 25 kg, 1 g L methionine, 50 kg water.

2. The seed dressing formulation according to claim 1, wherein It comprises the following steps:

3. The method for increasing survival rate of soybean seedling according to any one of claims 1-2, wherein, S1: select the construction of seedling site, seedling device, seedling pool, and configure the nutrient solution into the seedling pool; S2: configure the nutrient soil and load into the seedling tray; S3: before sowing, first carry out seed dressing treatment, when seed dressing, add 1 kg 3 billion / milliliter soybean rhizobium solution, 25 g ammonium molybdate, 1 g L methionine into 50 kg water to configure the seed soaking solution, and select the impurity soybean seeds and soak for 4~8 hours; S4: then filter and dry the soaked soybeans, and then coat with 6.25% fludioxonil · precise mefenoxam suspension seed coating agent (Jing Ge) before sowing; S5: use the seeder or artificial to sow the seed dressing soybean seeds in the seedling tray, and place it in the seedling pool and the seedling device, the temperature in the seedling device should be kept between 15~30℃, and the maximum temperature should not exceed 30℃; on sunny days, the film should be timely opened for ventilation and cooling from 10 am to 5 pm, and the film should be timely covered for heat preservation after 5 pm; S6: after germination, when it grows to 2 leaves and 1 heart, carry out thinning, and leave 2 seedlings per hole; after 3 leaves, start to train the seedlings, gradually open the two ends and two sides of the film for training, and spray 5% potassium dihydrogen phosphate foliar fertilizer; S7: when the soybean seedlings are 4~5 leaves old, transplant them in time, choose overcast days for transplanting, and cover the soybean seedlings with soil after they are straightened in the nest, and then transplant them; In S1, the seedling device and the seedling pool are constructed in a place which is sunny, convenient for transportation, close to water source, flat, low in underground water level, and fast in ground temperature recovery; the seedling pool is constructed by opening the box, each standard box is 8~12 m long, 1~1.5 m wide, 0.1~0.3 m deep, and the middle walkway is 0.25~0.4 m, and the pool is paved with polyvinyl chloride film, and long-acting insecticide is sprayed before paving the film to prevent underground pests from biting the film and causing water leakage.

4. The method of claim 3, wherein the soybean seedlings are grown in a greenhouse. In S2, the configuration method of the nutrient soil is as follows: according to the percentage, the proportion of husks is 30%, the proportion of dry livestock and poultry manure is 20%, the proportion of fine soil is 49.9%, and the proportion of urea is 0.1%, the materials are stacked in the above proportions, and a fermenting agent is added to ferment for 4~5 months to obtain the nutrient soil.

5. The method of increasing survival rate of soybean seedlings according to claim 3, wherein, In S2, the configuration method of the nutrient solution is as follows:

6. The method of increasing survival rate of soybean seedlings according to claim 3, wherein, S1.1: inject the qualified agricultural production water into the seedling pool, and control the water layer depth of the seedling pool to be 5~10 cm; S1.2: when the water layer depth is 5 cm, apply 100 g of compound fertilizer (N:P2O5:K2O=15:15:15), 25 g of magnesium sulfate (to prevent algae growth in the pool), and 50 g of 1000 billion spores / g bacillus subtilis per square meter of the seedling pool, and increase the application amount of compound fertilizer, magnesium sulfate, and bacillus subtilis by 20 g, 5 g, and 10 g per square meter per cm increase of the water layer depth, and control the water layer depth to be within 10 cm. It comprises:

7. The seedling raising device for use in a method of increasing the survival rate of soybean seedlings according to claim 3, wherein ​ The utility model discloses a main body frame, film, pulling device, the main body frame is arched structure, and the front and rear sides of main body frame are fixedly installed with outside slide rail, and the pulling device is movably installed on slide rail, the lower end of the side wall of main body frame is fixedly installed with support plate, and the upper end of support plate is symmetrically installed with support block on both sides, and the reel is detachably installed on support block, and the film is rolled on reel, The pulling device includes a pulling body, an inner baffle, a vertical plate, a fixing knob, a support column and a wheel. The support column is fixedly installed around the lower end of the pulling body, and the wheel is movably installed on the support column and clamped on the outside slide rail. The inner baffle is fixedly installed on the inner side of the side wall of the pulling body, and the vertical plate is linearly arrayed on the side wall of the pulling body corresponding to the inner baffle. The outermost vertical plate is provided with the fixing knob. The film is automatically covered by repeatedly winding the film up and down on the gap between the vertical plates and fixing the film by the fixing knob.

8. The seedling raising device for increasing survival rate of soybean seedlings according to claim 7, wherein The upper end of the support block is fixedly installed with the reel on the support block by bolts. The door is installed on the end faces of the main body frame.

9. The seedling raising device for increasing survival rate of soybean seedlings according to claim 7, wherein The length of the main body frame is 20-30 m, the width is 6-10 m, and the top height is 3-4 m.

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