Seedling Raising Method for Early-Maturing, Multi-Resistant and High-Quality Protected Strawberries

Abstract

The invention discloses a seedling cultivation method for early-maturing, multi-resistant and high-quality greenhouse strawberries, which includes suppressing and promoting the development of daughter plants growing on stolons in stages. By grading and controlling the development of daughter plants, it can effectively prevent the early-born daughter plants from taking root and aging on the mother plant, while promoting the development of the later-born daughter plants, so that the development of daughter plants is consistent; in this seedling cultivation method for early-maturing, multi-resistant and high-quality greenhouse strawberries, due to the nutritional inhibition of the development of the early-born daughter plants, the later-born daughter plants can develop rapidly, shortening the seedling cultivation time, making the obtained production seedlings have the same seedling age, and the daughter plants are robust. The strawberry seedlings with the same seedling age are uniformly cuttaged in plug trays without picking seedlings one by one, which can solve the problem of poor uniformity of seedlings in the same plug tray. Moreover, it shortens the management time of strawberry seedlings in the plug tray, reduces the management cost, improves the commercial rate of seedlings, is conducive to promoting the intensive production of strawberry seedlings, and in cooperation with the later management in the greenhouse, it can advance the strawberry listing time and obtain high-quality early-maturing strawberries.

Description

Technical Field

[0001] The present invention relates to the technical field of strawberry seedling raising methods, and specifically to a seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries. Background Art

[0002] Strawberries are perennial herbaceous plants of the genus Fragaria in the Rosaceae family. They have an excellent taste and are rich in nutrients, and are known as the "queen of fruits". The quality of the seedlings is closely related to the survival rate of strawberries after transplantation, and also has a direct impact on the fruit quality and yield of strawberries. Therefore, cultivating high-quality seedlings is the prerequisite for ensuring high yields and good quality of strawberries. There are two time periods for strawberry seedling raising, namely winter seedling raising and spring seedling raising. The time for winter seedling raising is generally from the end of November to the beginning of December.

[0003] At present, in production, strawberry seedling raising mainly adopts open-field seedling raising in the field. That is, around mid-April every year, strawberry mother plants are planted in the open-field strawberry seedling raising field. As the strawberry mother plants send out stolons, the seedlings are propagated by pressing the seedlings. About 15 days before transplantation, the vines are cut off, and then the seedlings are dug and transplanted in the seedling raising field at the determined transplantation period.

[0004] In mid-to-late June every year, when strawberry seedling propagation enters the period of frequent stolon growth, traditional field seedling raising at this time adopts the operation of pressing the seedlings to take root, or leading the small strawberry stolon seedlings to the plug trays or nutrient pots for fixing and taking root. At this time, the operation of cutting off the vines is generally not carried out until mid-to-late July, when the roots of the propagated strawberry stolons are fully developed, and then the operation of cutting off the vines is carried out. In this way, a method of gradually pressing and propagating seedlings in the plug trays is formed, which will greatly extend the occupation time of the seedling raising space and increase the management labor cost of seedling propagation. Moreover, there will be problems such as the coexistence of multiple-level seedlings in one plug tray and poor uniformity of the seedling varieties. Adopting the traditional seedling propagation method is time-consuming, laborious, and has a low input-output ratio. At the same time, compared with the seedling raising of solanaceous and cucurbitaceous vegetables, strawberries have problems such as a long seedling raising time (4 months) for production seedlings, vine pressing and propagation, an increasing number of propagated seedlings, and a small number of propagated seedlings per unit area. Summary of the Invention

[0005] The purpose of the present invention is to provide a seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries in view of the deficiencies of the prior art, so as to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries, including the following steps:

[0007] S1: Planting: Select sandy loam land with high organic matter content, loose soil, good air permeability, fertility, and convenient drainage and irrigation as the nursery land. Apply 2,500 - 3,000 kg of high-quality self-prepared organic compound fertilizer per mu. After plowing and harrowing, form high beds that are 1.5 - 1.6 meters wide, 25 - 30 meters long, and 35 - 40 cm high for standby. Lay a water-proof film on the high beds. In mid-to-late March, plant strawberry mother plants on the high beds. The row spacing for planting strawberry mother plants is 30 - 40 cm, and the plant spacing is 20 - 30 cm.

[0008] S2: Suppression of daughter plants: When the strawberry mother plants develop to late May and produce first-level daughter plants, after a cotyledon emerges from the first-level daughter plants, spray a rooting inhibitor at the base of the first-level daughter plants. As the strawberry mother plants continue to produce second-level daughter plants, continue to spray the rooting inhibitor at the base of the first-level daughter plants.

[0009] S3: Promotion of daughter plants: When the strawberry mother plants continue to produce third-level daughter plants, after a cotyledon emerges from the third-level daughter plants, spray a rooting promoter at the base of the third-level daughter plants. As the strawberry mother plants continue to produce fourth-level daughter plants, continue to spray the rooting promoter at the base of the fourth-level daughter plants. At the same time, stop spraying the rooting inhibitor on the first-level and second-level daughter plants.

[0010] S4: Cutting of small seedlings: Select first-level, second-level, third-level, and fourth-level daughter plants with consistent growth vigor and cut them off from the mother plants in sequence. Then plant the daughter plants in a plug tray. There is a substrate in the plug tray, and the substrate contains nutrients for strawberry growth. Water the plug tray with the planted daughter plants thoroughly with clear water every day, or immerse the plug tray in clear water and take it out after the substrate is soaked. Then place the plug tray in a greenhouse for normal cultivation to take root, obtaining the early-maturing, multi-resistant, and high-quality protected strawberry seedlings.

[0011] S5: Planting and cultivation: Plant the cultivated early-maturing, multi-resistant, and high-quality protected strawberry seedlings on the prepared bed surface in a timely manner.

[0012] As a preferred embodiment of the present invention, select strong and disease-free high-quality plants from the transplanted daughter plants in S1, remove the old leaves and residual leaves as strawberry mother plants, plant them in the nursery with soil, plant one row in the middle of each bed, water after planting, and spray a mixture of 0.3% urea and 0.4% potassium dihydrogen phosphate every 10 - 15 days.

[0013] As a preferred embodiment of the present invention, the rooting inhibitor includes paclobutrazol, tiabendazole, and abscisic acid. Among them, the mass-volume concentration of paclobutrazol is 400 mg / L - 500 mg / L, the mass-volume concentration of tiabendazole is 60 mg / L - 120 mg / L, and the mass-volume concentration of abscisic acid is 15 mg / L - 35 mg / L.

[0014] As a preferred embodiment of the present invention, the rooting promoter includes indoleacetic acid, indolebutyric acid and naphthylacetic acid, wherein the mass volume concentration of indoleacetic acid is 100 mg / L to 180 mg / L, the mass volume concentration of indolebutyric acid is 260 mg / L to 320 mg / L, and the mass volume concentration of naphthylacetic acid is 10 mg / L to 25 mg / L.

[0015] As a preferred embodiment of the present invention, the method for spraying the rooting inhibitor is as follows: after the primary and secondary seedlings grow a cotyledon, spray the base of the seedlings 3-4 times with a cycle of 2-3 days, each time with 3-8 mL of the rooting inhibitor.

[0016] As a preferred embodiment of the present invention, the rooting promoter is sprayed as follows: after the third-level seedlings and the fourth-level seedlings grow a cotyledon, the base of the seedlings is sprayed 3-4 times with a cycle of 1-2 days, each time with 3-8 mL of the rooting promoter.

[0017] As a preferred embodiment of the present invention, the selection criteria for the first-level, second-level, third-level and fourth-level seedlings with consistent growth are: the seedlings have two leaves and the root protrusions of 2-3 mm are exposed at the place where the stems and vines attach to the seedlings.

[0018] Compared with the prior art, the present invention provides a method for raising seedlings of early-maturing, multi-resistant and high-quality greenhouse strawberries, which has the following beneficial effects:

[0019] 1. The early-maturing, multi-resistant, high-quality greenhouse strawberry seedling raising method can effectively prevent the early-stage seedlings from taking root and aging on the mother seedlings by controlling the development of the seedlings in stages, while promoting the development of the late-stage seedlings so that the development of the seedlings remains consistent. Moreover, due to the nutritional inhibition of the development of the early-stage seedlings, the late-stage seedlings can develop rapidly, shortening the seedling raising time, making the obtained production seedlings of uniform age and strong seedlings, thereby greatly improving the economic benefits.

[0020] 2. The early-maturing, multi-resistant, high-quality greenhouse strawberry seedling raising method can solve the problem of poor uniformity of seedlings in the same seedling tray by uniformly carrying out plug-tray cuttings of strawberry seedlings of the same age without collecting them one by one. It can also shorten the management time of strawberry seedlings in the plug tray, reduce management costs, and increase the commercial rate of seedlings, which is conducive to promoting the intensive production of strawberry seedlings. Combined with the later management in the greenhouse, the time for strawberries to be put on the market can be advanced to obtain high-quality early-maturing strawberries. DETAILED DESCRIPTION

[0021] 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, not all of the embodiments. 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.

[0022] Example 1: A seedling-raising method for early-maturing, multi-resistant and high-quality greenhouse strawberries, comprising the following steps:

[0023] S1: Planting: Select sandy loam land with high organic matter content, loose soil, good air permeability, fertility, and convenient drainage and irrigation as the nursery land. Apply 2500 - 3000 kg of high-quality self-prepared organic compound fertilizer per mu. After plowing and harrowing, form high beds with a width of 1.5 - 1.6 m, a length of 25 - 30 m, and a height of 35 - 40 cm for standby. Lay a water-proof film on the high beds. In the middle and late March, plant strawberry mother plants on the high beds. The row spacing for planting strawberry mother plants is 30 - 40 cm, and the plant spacing is 20 - 30 cm;

[0024] S2: Suppression of daughter plants: When the strawberry mother plants develop to late May and produce first-level daughter plants, after a cotyledon grows on the first-level daughter plants, spray a rooting inhibitor at the base of the first-level daughter plants. As the strawberry mother plants continue to produce second-level daughter plants, continue to spray the rooting inhibitor at the base of the first-level daughter plants;

[0025] S3: Promotion of daughter plants: When the strawberry mother plants continue to produce third-level daughter plants, after a cotyledon grows on the third-level daughter plants, spray a rooting promoter at the base of the third-level daughter plants. As the strawberry mother plants continue to produce fourth-level daughter plants, continue to spray the rooting promoter at the base of the fourth-level daughter plants. At the same time, stop spraying the rooting inhibitor on the first-level and second-level daughter plants;

[0026] S4: Cutting of small seedlings: Select first-level, second-level, third-level, and fourth-level daughter plants with consistent growth vigor and cut them off from the mother plants in sequence. Then plant the daughter plants into a plug tray. There is a substrate in the plug tray, and there are nutrients for strawberry growth in the substrate. Water the plug tray with the planted daughter plants thoroughly with clean water every day, or immerse the plug tray in clean water and take it out after the substrate is soaked. Then place the plug tray in the greenhouse for normal cultivation to take root, obtaining the early-maturing, multi-resistant and high-quality greenhouse strawberry seedlings;

[0027] S5: Planting and cultivation: Plant the cultivated early-maturing, multi-resistant and high-quality greenhouse strawberry seedlings on the prepared ridge surface in time.

[0028] Furthermore, in S1, select strong and disease-free high-quality plants from the potted daughter plants during propagation, remove the old and damaged leaves as strawberry mother plants, plant them in the nursery with soil, plant one row in the middle of each ridge, water after planting, and spray a mixture of 0.3% urea and 0.4% potassium dihydrogen phosphate every 10 - 15 days.

[0029] Furthermore, the rooting inhibitor includes paclobutrazol, tiabendazole, and abscisic acid. Among them, the mass-volume concentration of paclobutrazol is 400 mg / L, the mass-volume concentration of tiabendazole is 60 mg / L, and the mass-volume concentration of abscisic acid is 15 mg / L.

[0030] Furthermore, the rooting promoter includes indoleacetic acid, indolebutyric acid, and naphthaleneacetic acid. Among them, the mass-volume concentration of indoleacetic acid is 100 mg / L, the mass-volume concentration of indolebutyric acid is 260 mg / L, and the mass-volume concentration of naphthaleneacetic acid is 10 mg / L.

[0031] Furthermore, the spraying method of the rooting inhibitor is as follows: After the first-level and second-level sub-seedlings grow one cotyledon, taking 2 - 3 days as a cycle, spray 3 - 4 times at the base of the sub-seedlings, with 3 mL of rooting inhibitor each time.

[0032] Furthermore, the spraying method of the rooting promoter is as follows: After the third-level and fourth-level sub-seedlings grow one cotyledon, taking 1 - 2 days as a cycle, spray 3 - 4 times at the base of the sub-seedlings, with 3 mL of rooting promoter each time.

[0033] Furthermore, the selection criteria for the first-level, second-level, third-level, and fourth-level sub-seedlings with consistent growth vigor are: The small seedlings have two leaves unfolded, and the root protrusions are 2 - 3 mm exposed at the position where the small seedlings are attached to the stem vine.

[0034] Example 2: A seedling-raising method for early-maturing, multi-resistant, and high-quality protected strawberries, comprising the following steps:

[0035] S1: Planting: Select sandy loam land with high organic matter content, loose soil, good air permeability, fertility, and convenient drainage and irrigation as the nursery land. Apply 2500 - 3000 kg of high-quality self-prepared organic compound fertilizer per mu. After plowing and harrowing, form high beds with a width of 1.5 - 1.6 m, a length of 25 - 30 m, and a height of 35 - 40 cm for standby. Lay a water-proof film on the high beds. Plant strawberry mother plants on the high beds in the middle and late March. The row spacing for planting strawberry mother plants is 30 - 40 cm, and the plant spacing is 20 - 30 cm.

[0036] S2: Sub-seedling inhibition: When the strawberry mother plants develop to late May and produce first-level sub-seedlings, after the first-level sub-seedlings grow one cotyledon, spray a rooting inhibitor at the base of the first-level sub-seedlings. When the strawberry mother plants continue to produce second-level sub-seedlings, continue to spray the rooting inhibitor at the base of the first-level sub-seedlings.

[0037] S3: Sub-seedling promotion: When the strawberry mother plants continue to produce first-level sub-seedlings, after the first-level sub-seedlings grow one cotyledon, spray a rooting promoter at the base of the third-level sub-seedlings. When the strawberry mother plants continue to produce fourth-level sub-seedlings, continue to spray the rooting promoter at the base of the fourth-level sub-seedlings. At the same time, stop spraying the rooting inhibitor on the first-level and second-level sub-seedlings.

[0038] S4: Cuttage of young seedlings: Select first-class, second-class, third-class, and fourth-class young seedlings with consistent growth vigor, cut them from the mother seedlings in sequence, then plant the young seedlings into a plug tray filled with a substrate containing nutrients for strawberry growth. Water the plug tray with young seedlings thoroughly with clean water every day, or immerse the plug tray in clean water and take it out after the substrate is saturated, then place the plug tray in a greenhouse for normal cultivation to take root, obtaining the early-maturing, multi-resistant, and high-quality protected strawberry seedlings.

[0039] S5: Planting and cultivation: Plant the cultivated early-maturing, multi-resistant, and high-quality protected strawberry seedlings on the prepared ridge surface in a timely manner.

[0040] Further, in S1, select strong and disease-free high-quality plants from the transplanted young seedlings during propagation, remove the old and damaged leaves as strawberry mother plants, and transplant them with soil into the nursery. Plant one row in the middle of each ridge, water after planting, and spray a mixture of 0.3% urea and 0.4% potassium dihydrogen phosphate every 10 - 15 days.

[0041] Further, the rooting inhibitor includes paclobutrazol, tiabendazole, and abscisic acid. Among them, the mass-volume concentration of paclobutrazol is 4500mg / L, the mass-volume concentration of tiabendazole is 100mg / L, and the mass-volume concentration of abscisic acid is 25mg / L.

[0042] Further, the rooting promoter includes indoleacetic acid, indolebutyric acid, and naphthaleneacetic acid. Among them, the mass-volume concentration of indoleacetic acid is 150mg / L, the mass-volume concentration of indolebutyric acid is 300mg / L, and the mass-volume concentration of naphthaleneacetic acid is 15mg / L.

[0043] Further, the spraying method of the rooting inhibitor is: After the first-class and second-class young seedlings grow one cotyledon, take 2 - 3 days as a cycle, spray 3 - 4 times at the base of the young seedlings, and spray 5mL of the rooting inhibitor each time.

[0044] Further, the spraying method of the rooting promoter is: After the third-class and fourth-class young seedlings grow one cotyledon, take 1 - 2 days as a cycle, spray 3 - 4 times at the base of the young seedlings, and spray 5mL of the rooting promoter each time.

[0045] The method steps of Example 2 are the same as those of the above example, except that the ratios of the growth inhibitor and the growth promoter are different.

[0046] Example 3: A method for raising seedlings of early-maturing, multi-resistant, and high-quality protected strawberries, including the following steps:

[0047] S1: Planting: Select sandy loam land with high organic matter content, loose soil, good air permeability, fertility, and convenient drainage and irrigation as the nursery land. Apply 2,500 - 3,000 kilograms of high-quality self-prepared organic compound fertilizer per mu. After plowing and harrowing finely, form high beds that are 1.5 - 1.6 meters wide, 25 - 30 meters long, and 35 - 40 cm high for standby. Lay a water-proof film on the high beds. In mid-to-late March, plant strawberry mother plants on the high beds. The row spacing for planting strawberry mother plants is 30 - 40 cm, and the plant spacing is 20 - 30 cm.

[0048] S2: Suppression of daughter plants: When the strawberry mother plants develop to late May and produce first-level daughter plants, after a cotyledon emerges from the first-level daughter plants, spray a rooting inhibitor at the base of the first-level daughter plants. As the strawberry mother plants continue to produce second-level daughter plants, continue to spray the rooting inhibitor at the base of the first-level daughter plants.

[0049] S3: Promotion of daughter plants: When the strawberry mother plants continue to produce first-level daughter plants, after a cotyledon emerges from the first-level daughter plants, spray a rooting promoter at the base of the third-level daughter plants. As the strawberry mother plants continue to produce fourth-level daughter plants, continue to spray the rooting promoter at the base of the fourth-level daughter plants. At the same time, stop spraying the rooting inhibitor on the first-level and second-level daughter plants.

[0050] S4: Cutting of small seedlings: Select first-level, second-level, third-level, and fourth-level daughter plants with consistent growth vigor and cut them off from the mother plants in sequence. Then plant the daughter plants into plug trays. There is a substrate in the plug trays, and the substrate contains nutrients for strawberry growth. Water the plug trays planted with daughter plants thoroughly with clean water every day, or immerse the plug trays in clean water and take them out after the substrate is soaked. Then place the plug trays in the greenhouse for normal cultivation to take root, obtaining the early-maturing, multi-resistant, and high-quality protected strawberry seedlings.

[0051] S5: Planting and cultivation: Plant the cultivated early-maturing, multi-resistant, and high-quality protected strawberry seedlings on the prepared bed surface in a timely manner.

[0052] Furthermore, in S1, select strong and disease-free high-quality plants from the potted daughter plants during propagation, remove the old and damaged leaves as strawberry mother plants, and plant them in the nursery with soil. Plant one row in the middle of each bed, water after planting, and spray a mixture of 0.3% urea and 0.4% potassium dihydrogen phosphate every 10 - 15 days.

[0053] Furthermore, the rooting inhibitor includes paclobutrazol, triiodobenzoic acid, and abscisic acid. Among them, the mass-volume concentration of paclobutrazol is 500 mg / L, the mass-volume concentration of triiodobenzoic acid is 120 mg / L, and the mass-volume concentration of abscisic acid is 35 mg / L.

[0054] Furthermore, the rooting promoter includes indoleacetic acid, indolebutyric acid, and naphthylacetic acid, wherein the mass volume concentration of indoleacetic acid is 180 mg / L, the mass volume concentration of indolebutyric acid is 320 mg / L, and the mass volume concentration of naphthylacetic acid is 25 mg / L.

[0055] Furthermore, the method for spraying the rooting inhibitor is as follows: after the first-level seedlings and the second-level seedlings grow a cotyledon, the base of the seedlings is sprayed 3-4 times with a cycle of 2-3 days, each time with 8 mL of the rooting inhibitor.

[0056] Furthermore, the rooting promoter is sprayed as follows: after the third-level seedlings and the fourth-level seedlings grow a cotyledon, the base of the seedlings is sprayed 3-4 times with a cycle of 1-2 days, each time with 8 mL of the rooting promoter.

[0057] The method and steps of Example 3 are the same as those of the above-mentioned Example, except that the ratios of the growth inhibitor and the growth promoter are different.

[0058] The present invention can effectively prevent the early-stage seedlings from taking root and aging on the mother seedlings by controlling the development of the seedlings in stages, and promote the development of the late-stage seedlings so that the development of the seedlings remains consistent. Moreover, due to the nutritional inhibition of the development of the early-stage seedlings, the late-stage seedlings can develop rapidly, thus shortening the seedling raising time, making the obtained production seedlings of uniform age, and making the seedlings robust, thereby greatly improving the economic benefits.

[0059] By uniformly propagating strawberry seedlings of the same age in plug trays, there is no need to collect them one by one. This can solve the problem of poor uniformity of seedlings in the same seedling tray, shorten the management time of strawberry seedlings in plug trays, reduce management costs, and increase the commercial rate of seedlings. It is conducive to promoting the intensive production of strawberry seedlings. Combined with the later management in the greenhouse, the time for strawberries to be put on the market can be advanced to obtain high-quality early-maturing strawberries.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries, Characterized in that: It includes the following steps: S1: Planting: Select sandy loam land with high organic matter content, loose soil, good air permeability, fertility, and convenient drainage and irrigation as the nursery land. Apply 2500-3000 kg of high-quality self-prepared organic compound fertilizer per mu. After plowing and harrowing, form high beds with a width of 1.5-1.6 m, a length of 25-30 m, and a height of 35-40 cm for standby. Lay a water-proof film on the high beds. In the middle and late March, plant strawberry mother plants on the high beds. The row spacing for planting strawberry mother plants is 30-40 cm, and the plant spacing is 20-30 cm; S2: Suppression of daughter plants: When the strawberry mother plants develop to late May and produce first-level daughter plants, after a cotyledon grows on the first-level daughter plants, spray a rooting inhibitor at the base of the first-level daughter plants. When the strawberry mother plants continue to produce second-level daughter plants, continue to spray the rooting inhibitor at the base of the first-level daughter plants; S3: Promotion of daughter plants: When the strawberry mother plants continue to produce third-level daughter plants, after a cotyledon grows on the third-level daughter plants, spray a rooting promoter at the base of the third-level daughter plants. When the strawberry mother plants continue to produce fourth-level daughter plants, continue to spray the rooting promoter at the base of the fourth-level daughter plants. At the same time, stop spraying the rooting inhibitor on the first-level and second-level daughter plants; S4: Cuttage of small seedlings: Select first-level, second-level, third-level, and fourth-level daughter plants with consistent growth vigor and cut them off from the mother plants in turn. Then plant the daughter plants in a plug tray. There is a substrate in the plug tray, and there are nutrients for strawberry growth in the substrate. Water the plug tray with the planted daughter plants thoroughly with clean water every day, or immerse the plug tray in clean water and take it out after the substrate is soaked. Then place the plug tray in the greenhouse for normal rooting culture to obtain the early-maturing, multi-resistant and high-quality protected strawberry seedlings; S5: Planting and cultivation: Plant the cultured early-maturing, multi-resistant and high-quality protected strawberry seedlings on the prepared ridge surface in time.

2. The seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries according to claim 1, Characterized in that, In S1, select strong and disease-free high-quality plants from the transplanted daughter plants, remove the old and residual leaves as strawberry mother plants, plant them in the nursery with soil, plant one row in the middle of each ridge, water after planting, and spray a mixture of 0.3% urea and 0.4% potassium dihydrogen phosphate every 10-15 days.

3. The seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries according to claim 1, Characterized in that, The rooting inhibitor includes paclobutrazol, triiodobenzoic acid and abscisic acid. Among them, the mass-volume concentration of paclobutrazol is 400 mg / L - 500 mg / L, the mass-volume concentration of triiodobenzoic acid is 60 mg / L - 120 mg / L, and the mass-volume concentration of abscisic acid is 15 mg / L - 35 mg / L.

4. The seedling raising method for early-maturing, multi-resistant and high-quality protected strawberries according to claim 1, Characterized in that, The rooting promoter includes indoleacetic acid, indolebutyric acid, and naphthaleneacetic acid. Among them, the mass-volume concentration of indoleacetic acid is 100 mg / L - 180 mg / L, the mass-volume concentration of indolebutyric acid is 260 mg / L - 320 mg / L, and the mass-volume concentration of naphthaleneacetic acid is 10 mg / L - 25 mg / L.

5. The seedling raising method of early-maturing, multi-resistant and high-quality protected strawberries according to claim 1, characterized in that, the spraying method of the rooting inhibitor is as follows: after a cotyledon grows on the first-level and second-level daughter seedlings, with a cycle of 2-3 days, spray 3-4 times at the base of the daughter seedlings, 3-8 mL of the rooting inhibitor each time.

6. The seedling raising method of early-maturing, multi-resistant and high-quality protected strawberries according to claim 1, characterized in that, the spraying method of the rooting promoter is as follows: after a cotyledon grows on the third-level and fourth-level daughter seedlings, with a cycle of 1-2 days, spray 3-4 times at the base of the daughter seedlings, 3-8 mL of the rooting promoter each time.

7. The seedling raising method of early-maturing, multi-resistant and high-quality protected strawberries according to claim 1, characterized in that, the selection criteria for the first-level, second-level, third-level and fourth-level daughter seedlings with consistent growth are: the small seedlings show two leaves, and the root protrusions are 2-3 mm exposed at the place where the small seedlings are attached to the stem vine.