CN102612961B - Method for cultivating olive seedlings - Google Patents

Abstract

The invention belongs to the field of plant cultivation, in particular to a method for cultivating olive seedlings. The technical problem to be solved by the invention is that the quality of the root system of the olive seedlings cultivated by the existing cultivation method is poor, and the survival rate after transplanting is low. The technical scheme of the present invention to solve this problem is to provide a method for cultivating olive seedlings, comprising the following steps: a, cutting; b, cultivating; c, seedling hardening. The invention provides a better method for cultivating the olive seedlings, and can improve the quality of the root system of the olive seedlings and the survival rate after transplanting.

Description

Cultivation method of olive seedlings

technical field

The invention belongs to the field of plant cultivation, in particular to a method for cultivating olive seedlings.

Background technique

Olive oil belongs to the evergreen tree of the family Oleaceae Oleaceae. It is a world-renowned woody oil and fruit tree species. The cultivated species have high edible value and are rich in high-quality edible vegetable oil-olive oil. It is a famous subtropical fruit tree and an important economic tree. Mainly distributed in the Mediterranean region, such as: Greece, Italy, Tunisia, Spain and so on. All countries in the world are now introduced and cultivated. Before 1950, very few olives were introduced into my country, and they were planted in Fujian, Taiwan, Mengzi in Yunnan, Gansu, Sichuan, and Chongqing. From 1956 to 1962, it was included in the national introduction plan, and 1800 seedlings and some seeds were introduced from the Soviet Union and Albania successively. In 1964, under the personal care of Premier Zhou Enlai, 10,000 olive plants were introduced for large-scale cultivation experiments. Since 1973, production and cultivation have been gradually developed in areas where initial introduction has been successful, and large-scale planting has been carried out in suitable planting areas.

At present, the general steps of the olive cultivation method are to take branches and carry out cutting cultivation to make them root, then transplant the root cutting seedlings to a nursery, carry out seedling cultivation, and plant them to dry after leaving the nursery. In the process of cultivating cutting seedlings, the method of raising seedlings in seedbeds is often used. It takes a long time for the branches to grow roots, and the quality of the root system is poor. Subsequently, the seedlings after rooting are transported to the destination for transplanting, and the seedlings need to be taken out before transportation, and the soil on the seedling root system needs to be removed for convenience of transportation, but this will damage the root system and make the survival rate low. Therefore, the root quality of the seedlings cultivated by the existing methods is not good, and the transplanting survival rate is low, which is unfavorable for the popularization and planting of olives, and restricts the development of the whole industry. This field is in urgent need of developing a cultivation method that can provide high-quality olive seedlings in large quantities.

Contents of the invention

The technical problem to be solved by the invention is that the quality of the root system of the olive seedlings cultivated by the existing cultivation method is poor, and the survival rate after transplanting is low.

The technical scheme that the present invention solves this problem provides a kind of cultivation method of olive seedling, comprises the following steps:

a, cutting: cut the olive branch, soak the branch in the rooting liquid, and insert it into the seedling tray equipped with nutrient soil;

b. Cultivation: Keep the air humidity at 80-90% after the cuttings, spray with vitamin B2 solution, and water the water-soluble compound fertilizer after the cuttings grow roots;

c. Seedling hardening: After the root system is basically formed, increase the light and reduce the air humidity for the seedlings. The hardening time is 15 to 20 days.

Wherein, the seedling tray described in step a is placed in a greenhouse, and fog spray equipment is provided in the greenhouse, and a sunshade net is arranged on the greenhouse; after the cuttings, the sunshade net is used to shade the sun, and the temperature in the greenhouse is controlled not to exceed 30°C, and the air humidity is 80-90°C. %.

Wherein, the olive branch described in step a is an annual branch on a fruit-bearing tree less than seven years old, the cutting branch is 8-10 cm long, and a pair of leaves are reserved on the top of the cutting branch.

Wherein, the rooting liquid described in step a is 50-100 mg/L boric acid and 200-300 mg/L naphthalene acetic acid, and the soaking time is 10-12 hours.

Wherein, the main component of the nutrient soil described in step a is peat, silt, perlite and decomposed organic fertilizer, and its mass ratio is peat: silt: perlite: decomposed organic fertilizer=3: 3: 3: 1, pH 7.1～7.3.

Wherein, the nutrient soil described in step a is disinfected before use.

Wherein, the concentration of the vitamin B2 solution described in step b is 150-250 ppm, spray irrigation 3 times, once every 4 days, and the dosage is 1-1.5 L per square meter.

Wherein, the main nutrient components of the water-soluble compound fertilizer in step b are N, P ₂ O ₅ and K ₂ O, and the balance is trace elements such as S, B, Cu, Fe, etc., and the concentration is 200-250 ppm.

Wherein, the water-soluble compound fertilizer described in step b is applied once a week.

Wherein, increasing the light and reducing the air humidity in step c refers to opening the greenhouse film and the sunshade net to expose the seedlings to the external environment.

The seedlings cultivated by the method of the present invention take root early, have well-developed root systems, form root clusters, and have good quality; the cutting branches have a high survival rate, which shortens the time from cutting to transplanting; after transplanting, the survival rate is high, which can reach 97%, and the growth is fast. The annual growth of seedlings is large, which greatly shortens the seedling raising cycle.

Detailed ways

The cultivation method of olive seedling of the present invention comprises the following steps:

a, cutting: cut the olive branch, soak the branch in the rooting liquid, and insert it into the seedling tray equipped with nutrient soil;

b. Cultivation: Keep the air humidity at 80-90% after the cuttings, spray with vitamin B2 solution, and water the water-soluble compound fertilizer after the cuttings grow roots;

c. Seedling hardening: After the root system is basically formed, increase the light and reduce the air humidity for the seedlings. The hardening time is 15 to 20 days.

Wherein, the seedling tray described in step a is placed in a greenhouse, and fog spray equipment is provided in the greenhouse, and a sunshade net is arranged on the greenhouse; after the cuttings, the sunshade net is used to shade the sun, and the temperature in the greenhouse is controlled not to exceed 30°C, and the air humidity is 80-90°C. %.

Wherein, the olive branch described in step a is an annual branch on a fruit-bearing tree less than seven years old, the cutting branch is 8-10 cm long, and a pair of leaves are reserved on the top of the cutting branch.

Wherein, the rooting liquid described in step a is 50-100 mg/L boric acid and 200-300 mg/L naphthalene acetic acid, and the soaking time is 10-12 hours.

Wherein, the main component of the nutrient soil described in step a is peat, silt, perlite and decomposed organic fertilizer, and its mass ratio is peat: silt: perlite: decomposed organic fertilizer=3: 3: 3: 1, pH 7.1～7.3.

Wherein, the nutrient soil described in step a is disinfected before use.

Wherein, the concentration of the vitamin B2 solution described in step b is 150-250 ppm, spray irrigation 3 times, once every 4 days, and the dosage is 1-1.5 L per square meter.

Wherein, the main nutrient components of the water-soluble compound fertilizer in step b are N, P ₂ O ₅ and K ₂ O, and the balance is trace elements such as S, B, Cu, Fe, etc., and the concentration is 200-250 ppm.

Wherein, the water-soluble compound fertilizer described in step b is applied once a week.

Wherein, increasing the light and reducing the air humidity in step c refers to opening the greenhouse film and the sunshade net to expose the seedlings to the external environment.

In the present invention, the seedling tray uses a stamping method to punch out a cup-shaped (barrel-shaped) structure (hole) on the plate. The use of the seedling tray is for the convenience of transportation. Before the seedlings are transported to the cultivation site, the seedling tray can be directly moved without taking out the seedlings, which avoids damage to the root system of the seedlings when taking the seedlings; taking out the seedlings together with the nutrient soil during cultivation also protects the The role of the root. In addition, the seedling tray can be used repeatedly, which is beneficial to reduce the production cost of seedling cultivation. The seedling tray has 32 holes, 50 holes, 72 holes and other specifications. The diameter of each seedling hole is 3-5 cm, the bottom diameter is 2-4 cm, the depth is 5-6 cm, and the bottom has 3-4 small holes for Drain excess water and increase the oxygen content in the nutrient soil. During the cultivation of seedlings, put the seedling tray in the greenhouse, install mist spray equipment in the greenhouse, and spray tap water to adjust the air humidity in the greenhouse to 80-90%. If it is too high, fungal infection will easily occur, and if it is lower than 60%, it will easily lead to drop. Leaves; the optimum growth temperature of olives is 22-30°C, and the temperature in the greenhouse is controlled to not exceed 30°C through the shade net on the greenhouse.

The olive cutting branches selected in the present invention are generally selected to be fruit-bearing and trees within 7 years old. It is best to choose a strong annual branch that is free from diseases and insect pests, ventilated and sunny, and the cutting branches are 8 to 10 centimeters long. For leaves, this branch is suitable for cuttings. Soaking the roots of branches with rooting liquid helps to induce the formation of callus at the roots of branches and promote rooting. When cutting, press the soil tightly so that the cutting branches and the nutrient soil are closely combined, and water to make the nutrient soil moist, that is, it can be formed into a ball by hand, and it is better to touch it slightly.

The nutrient soil of the present invention is formed by mixing peat, silt, perlite and decomposed organic fertilizer, which is weakly alkaline, loose in soil quality, strong in water retention and rich in nutrition, and is beneficial to the growth of seedlings. In addition, the nutrient soil is disinfected before use, which can prevent mold growth and affect the growth of cutting branches. Disinfection can be performed with potassium permanganate solution or autoclaved with an autoclave. Peat, silt, and perlite are commonly used peat, silt, and perlite for cultivation in the market. The decomposed organic fertilizer is a general farm decomposed organic fertilizer.

In the present invention, watering with vitamin B2 solution 3 times (1 time every 4 days) after cutting can promote cell metabolism and is beneficial to rooting. After the cuttings start to grow roots (about 20 days), water the water-soluble compound fertilizer. The water-soluble compound fertilizer is rich in N, P ₂ O ₅ and K ₂ O and trace elements such as S, B, Cu, Fe, etc., which can promote root growth , water once a week or so.

In the present invention, after the root system of the cuttages is basically formed (about 80 to 85 days), seedling hardening starts. During the seedling hardening process, the light intensity should be from weak to strong, increasing day by day. The number of hardening days can be determined according to the external environment. The greater the difference between the external environment and the environment in the greenhouse, the longer the hardening time.

Embodiment uses the inventive method to cultivate olive seedlings

cuttings

Collection of cutting branches: Harvest branches on March 3. The selected branches are: olive trees (species FRANTOIO) that have hung fruit and are less than seven years old. Cut the strong annual branches that grow in the sun and are ventilated. In the middle, cut to a length of 10 cm, and keep 1 pair of cutting branches with leaves. The upper cut of the cutting branch is 0.3 to 0.6 cm away from the first node, and the lower cut is close to the bottom node. After the cuttings are cut, they are bundled, with 50 to 100 branches per bundle. Soak the bundled cuttage branch root with the boric acid of 50mg/L and the naphthalene acetic acid of 200mg/L, soaking time is 10 hours.

Cutting nutrient soil: Mix peat, silt, perlite and decomposed organic fertilizer in a ratio of 3:3:3:1, pH7.1-7.3, and sterilize with 0.2% potassium permanganate solution.

Cutting: insert the soaked olive cuttings into the seedling tray (the seedling tray has 32 holes, 50 holes, 72 holes and other specifications, the diameter of the upper opening of each seedling hole is 3 to 5 cm, the diameter of the bottom is 2 to 4 cm, and the depth 5-6 cm, and there are 3-4 small holes at the bottom, which are used to drain excess water and increase the oxygen content in the nutrient soil). Insert a cutting branch in each hole of the seedling tray. About 2 cm from the bottom of the seedling hole. After inserting, press the soil tightly, so that the cutting branches and the nutrient soil are closely combined. Water the nutrient soil to keep it moist to keep the water content of the nutrient soil at 50-80%. Use shading nets for shading and spraying tap water with mist spray equipment to keep the relative humidity of the air at 80-90%; control the temperature at 22-30°C, and the optimum temperature is 28°C.

cultivate

According to the actual situation, spray tap water to keep the air humidity at 80-90%. Spray irrigation with 200ppm vitamin B2 solution 3 times, once every 4 days, using 1-1.5L per square meter. After the cuttings grow roots, water 200ppm of water-soluble compound fertilizer (compo company's full water-soluble compound fertilizer, the specification is NP ₂ O ₅ -K ₂ O(20-20-20)) once a week.

Seedling hardening

The seedlings after the root system is basically formed are hardened. Open the greenhouse film and sunshade net on the cutting bed to expose the seedlings to the external environment. From the opening for 2 hours, the opening time increases day by day, and the seedlings are hardened for 15 days. Spray tap water once every morning and afternoon for 2 to 3 days. minute.

See Table 1 for the cultivation results.

Comparative example 1

The vitamin B2 solution was not used during the cultivation process, and other steps were the same as in the examples.

Collection of cutting branches: Harvest branches on March 3. The selected branches are: olive trees (species FRANTOIO) that have hung fruit and are less than seven years old. Cut the strong annual branches that grow in the sun and are ventilated. In the middle, cut to a length of 10 cm, and keep 1 pair of cutting branches with leaves. The upper cut of the cutting branch is 0.3 to 0.6 cm away from the first node, and the lower cut is close to the bottom node. After the cuttings are cut, they are bundled, with 50 to 100 branches per bundle. Soak the bundled cuttage branch root with the boric acid of 50mg/L and the naphthalene acetic acid of 200mg/L, soaking time is 10 hours.

Cutting nutrient soil: Mix peat, silt, perlite and decomposed organic fertilizer in a ratio of 3:3:3:1, pH7.1-7.3, and sterilize with 0.2% potassium permanganate solution.

Cutting: insert the soaked olive cuttings into the seedling tray (the seedling tray has 32 holes, 50 holes, 72 holes and other specifications, the diameter of the upper opening of each seedling hole is 3 to 5 cm, the diameter of the bottom is 2 to 4 cm, and the depth 5-6 cm, and there are 3-4 small holes at the bottom, which are used to drain excess water and increase the oxygen content in the nutrient soil). Insert a cutting branch in each hole of the seedling tray. About 2 cm from the bottom of the seedling hole. After inserting, press the soil tightly, so that the cutting branches and the nutrient soil are closely combined. Water the nutrient soil to keep it moist to keep the water content of the nutrient soil at 50-80%. Use shading nets for shading and spraying tap water with mist spray equipment to keep the relative humidity of the air at 80-90%; control the temperature at 22-30°C, and the optimum temperature is 28°C.

cultivate

According to the actual situation, spray tap water to keep the air humidity at 80-90%. After the cuttings grow roots, water 200ppm of water-soluble compound fertilizer (compo company's full water-soluble compound fertilizer, the specification is NP ₂ O ₅ -K ₂ O(20-20-20)) once a week.

Seedling hardening

The seedlings after the root system is basically formed are hardened. Open the greenhouse film and sunshade net on the cutting bed to expose the seedlings to the external environment. From the opening for 2 hours, the opening time increases day by day, and the seedlings are hardened for 15 days. Spray tap water once every morning and afternoon for 2 to 3 days. minute.

See Table 1 for the cultivation results.

Comparative example 2

The nutrient soil in the embodiment is not used in the seedling raising tray, but the nutrient soil mixed by sand, peat and decomposed organic fertilizer in a ratio of 6:3:1.

cuttings

Cutting branch collection The branches were harvested on March 3. The selected branches were: olive trees (variety FRANTOIO) that had been fruited and less than seven years old, and cut the middle part of strong annual branches that grew in the sun and were ventilated. , cut to a length of 10 cm, and keep 1 pair of leaf cuttings. The upper cut of the cutting branch is 0.3 to 0.6 cm away from the first node, and the lower cut is close to the bottom node. After the cuttings are cut, they are bundled, with 50 to 100 branches per bundle. Soak the bundled cuttage branch root with the boric acid of 50mg/L and the naphthalene acetic acid of 200mg/L, soaking time is 10 hours.

Cutting nutrient soil: Mix sand, peat and decomposed organic fertilizer in a ratio of 6:3:1, pH7.1-7.3, and disinfect with 0.2% potassium permanganate solution.

Cutting: insert the soaked olive cuttings into the seedling tray (the seedling tray has 32 holes, 50 holes, 72 holes and other specifications, the diameter of the upper opening of each seedling hole is 3 to 5 cm, the diameter of the bottom is 2 to 4 cm, and the depth 5-6 cm, and there are 3-4 small holes at the bottom, which are used to drain excess water and increase the oxygen content in the nutrient soil). Insert a cutting branch in each hole of the seedling tray. About 2 cm from the bottom of the seedling hole. After inserting, press the soil tightly, so that the cutting branches and the nutrient soil are closely combined. Water the nutrient soil to keep it moist to keep the water content of the nutrient soil at 50-80%. Use shading nets for shading and spraying tap water with mist spray equipment to keep the relative humidity of the air at 80-90%; control the temperature at 22-30°C, and the optimum temperature is 28°C.

cultivate

According to the actual situation, spray tap water to keep the air humidity at 80-90%. Spray irrigation with 200ppm vitamin B2 solution 3 times, once every 4 days, with a dosage of 1-1.5L per square meter. After the cuttings grow roots, water 200ppm of water-soluble compound fertilizer (compo company's full water-soluble compound fertilizer, the specification is NP ₂ O ₅ -K ₂ O(20-20-20)) once a week.

Seedling hardening

The seedlings after the root system is basically formed are hardened. Open the greenhouse film and sunshade net on the cutting bed to expose the seedlings to the external environment. From the opening for 2 hours, the opening time increases day by day, and the seedlings are hardened for 15 days. Spray tap water once every morning and afternoon for 2 to 3 days. minute.

See Table 1 for the cultivation results.

Comparative example 3

Cuttage branches are not soaked in rooting solution, and other steps are the same as in the examples.

cuttings

Collection of cutting branches: Harvest branches on March 3rd, and cut the middle part of the strong annual branches that have grown in the sun and are ventilated and sunny, and cut them to a length of 10 cm. , keep 1 pair of leaf cuttings. The upper cut of the cutting branch is 0.3 to 0.6 cm away from the first node, and the lower cut is close to the bottom node.

Cutting nutrient soil: Mix peat, silt, perlite and decomposed organic fertilizer in a ratio of 3:3:3:1, pH7.1-7.3, and sterilize with 0.2% potassium permanganate solution.

Cutting: insert the soaked olive cuttings into the seedling tray (the seedling tray has 32 holes, 50 holes, 72 holes and other specifications, the diameter of the upper opening of each seedling hole is 3 to 5 cm, the diameter of the bottom is 2 to 4 cm, and the depth 5-6 cm, and there are 3-4 small holes at the bottom, which are used to drain excess water and increase the oxygen content in the nutrient soil). Insert a cutting branch in each hole of the seedling tray. About 2 cm from the bottom of the seedling hole. After inserting, press the soil tightly, so that the cutting branches and the nutrient soil are closely combined. Water the nutrient soil to keep it moist to keep the water content of the nutrient soil at 50-80%. Use shading nets for shading and spraying tap water with mist spray equipment to keep the relative humidity of the air at 80-90%; control the temperature at 22-30°C, and the optimum temperature is 28°C.

cultivate

According to the actual situation, spray tap water to keep the air humidity at 80-90%. Spray irrigation with 200ppm vitamin B2 solution 3 times, once every 4 days, with a dosage of 1-1.5L per square meter. After the cuttings grow roots, water 200ppm of water-soluble compound fertilizer (compo company's full water-soluble compound fertilizer, the specification is NP ₂ O ₅ -K ₂ O(20-20-20)) once a week.

Seedling hardening

The seedlings after the root system is basically formed are hardened. Open the greenhouse film and sunshade net on the cutting bed to expose the seedlings to the external environment. From the opening for 2 hours, the opening time increases day by day, and the seedlings are hardened for 15 days. Spray tap water once every morning and afternoon for 2 to 3 days. minute.

See Table 1 for the cultivation results.

Comparative example 4

Cultivate seedlings with cutting bed cuttings, other steps are identical with embodiment.

cuttings

Cutting branch collection The branches were harvested on March 3. The selected branches were: olive trees (variety FRANTOIO) that had hung fruit and were less than seven years old. Cut to a length of 10 cm, and keep 1 pair of leaf cuttings. The upper cut of the cutting branch is 0.3 to 0.6 cm away from the first node, and the lower cut is close to the bottom node. After the cuttings are cut, they are bundled, with 50 to 100 branches per bundle. Soak the bundled cuttage branch root with the boric acid of 100mg/L and the naphthalene acetic acid of 300mg/L, soaking time is 10 hours.

Cutting nutrient soil: Mix peat, silt, perlite and decomposed organic fertilizer in a ratio of 3:3:3:1, pH 7.1-7.3, sterilize with 0.2% potassium permanganate solution, and the treated nutrient soil Put in the cutting bed.

Cutting: insert the soaked olive cuttings into the cutting bed, the insertion depth is 1/3 of the cuttings, and after inserting, press the soil tightly so that the cuttings and the nutrient soil are closely combined. Water the nutrient soil to keep it moist to keep the water content of the nutrient soil at 50-80%. Spray tap water through sunshade nets and mist spray equipment to keep the relative humidity of the air at 80-90%. If it is too high, fungal infection will easily occur, and if it is lower than 70%, it will easily lead to leaf loss; adjust the temperature at 22-30°C, and the most suitable temperature is 28°C .

cultivate

According to the actual situation, spray tap water to keep the air humidity at 80-90%. Spray irrigation with 200ppm vitamin B2 solution 3 times, once every 4 days. After the cuttings grow roots, water 200ppm of water-soluble compound fertilizer (compo company's full water-soluble compound fertilizer, the specification is NP ₂ O ₅ -K ₂ O(20-20-20)) once a week.

Seedling hardening

The seedlings after the root system is basically formed are hardened. Open the greenhouse film and sunshade net on the cutting bed to expose the seedlings to the external environment. From the opening for 2 hours, the opening time increases day by day, and the seedlings are hardened for 15 days. Spray tap water once every morning and afternoon for 2 to 3 days. minute.

See Table 1 for the cultivation results.

Table 1 Experimental results of different cultivation methods

The time when the first new leaf grows in Table 1 refers to the calculation from the cutting, and the ground diameter refers to the diameter of the trunk at 1 cm from the ground.

As can be seen from the data in Table 1: in the process of adopting the inventive method to cultivate olive seedlings, the root system of the cutting branch appears early, and the root system quality is good, which is conducive to the absorption of nutrients by the seedlings, and can accelerate the growth rate of the seedlings; Before the seedlings are transported to the cultivation site, the seedling tray can be directly moved without taking the seedlings out, which avoids damage to the root system of the seedlings when taking the seedlings. Taking out the seedlings together with the nutrient soil during cultivation also protects the roots. Therefore, the survival rate of transplanting high, the root system is complete, and the later growth is also faster; the ingredients and the ratio of the ingredients used in the nutrient soil are very suitable for the growth of olive seedlings; soaking the branches with rooting liquid can promote the formation of callus, which is conducive to rooting; after cutting Applying vitamin B2 can promote cell metabolism and rooting; applying water-soluble compound fertilizer after rooting can promote root growth.

Claims (6)

1. the cultivation method of olive seedling, is characterized in that: comprise the following steps: a, cuttage: cut the olive branch, soak the branch in the rooting solution, insert it in the seedling tray equipped with nutrient soil; the rooting solution is boric acid of 50～100mg/L and naphthaleneacetic acid of 200～300mg/L, soaking time is 10 ~12 hours; the main components of the nutrient soil are peat, silt, perlite and decomposed organic fertilizer, and its mass ratio is peat: silt: perlite: decomposed organic fertilizer=3:3:3:1, pH7.1～7.3; b. Cultivation: keep the air humidity at 80-90% after the cuttings, spray with vitamin B2 solution, water soluble compound fertilizer after the cuttings grow roots; the concentration of the vitamin B2 solution is 150-250ppm, spray 3 times, every 4 days Once, the dosage is 1-1.5L per square meter; c. Seedling hardening: After the root system is basically formed, increase the light and reduce the air humidity for the seedlings. The hardening time is 15 to 20 days. 2. The method for cultivating olive seedlings according to claim 1, characterized in that: the seedling tray described in step a is placed in a greenhouse, and fog spray equipment is provided in the greenhouse, and a sunshade net is set on the greenhouse; use a sunshade net after cutting Shade, control the temperature in the greenhouse to not exceed 30°C, and the air humidity to be 80-90%. 3. The method for cultivating olive seedlings according to claim 1, characterized in that: the olive branch described in step a is an annual branch on a fruit-bearing tree within seven years of tree age, the cutting branch is 8 to 10 centimeters long, and the top of the cutting branch is Keep a pair of leaves. 4. The method for cultivating olive seedlings according to claim 1, characterized in that: the nutrient soil in step a is sterilized before use. 5. The cultivation method of olive seedlings according to claim 1, characterized in that: the water-soluble compound fertilizer described in step b is applied once a week. 6. The method for cultivating olive seedlings according to any one of claims 1 to 5, characterized in that: increasing light and reducing air humidity described in step c refer to opening the greenhouse film and the sunshade net so that the seedlings are exposed to in the external environment.