CN113973664A - Method for breeding strawberry production seedlings by utilizing natural barrier - Google Patents
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/05—Fruit crops, e.g. strawberries, tomatoes or cucumbers
Abstract
The invention discloses a method for breeding strawberry seedlings by using a natural barrier, which comprises the following steps: 1) variety selection: selecting excellent strawberry varieties suitable for the climatic features of Chongqing areas, such as Xiangye, Hongyu, Hongyan or Miaoxiangqi; 2) selecting a stock plant: selecting a first-generation virus-free seedling or a second-generation virus-free seedling as a stock plant for breeding strawberry production seedlings; 3) selecting a nursery land: selecting land with the elevation of 600-900 m, flat terrain, convenient irrigation and drainage, loose and fertile soil, shady land blocks with mountain forests on two sides, and the direct solar irradiation time not more than 5 hours; 4) preparing a seedbed: according to the condition of soil fertilizers, fertilizers are applied to the soil, deep ploughing and fine raking are carried out, high furrows with the furrow width of 1.6 meters, the furrow height of 20 centimeters and the furrow width of 30 centimeters are made, side furrows are arranged on the periphery of a nursery land, and the furrow depth is 30-50 centimeters.
Description
Technical Field
The invention relates to the technical field of seedling culture, in particular to a method for breeding strawberry seedlings by utilizing a natural barrier.
Background
The method for breeding strawberry seedlings by utilizing strawberry stolon seedling is the most common seedling breeding method for breeding strawberry seedlings at present. In the Chongqing area, the climate in summer of 7-8 months is hot and long in duration, great challenges are brought to the breeding of strawberry production seedlings, adverse effects caused by burning sun and high temperature during seedling culture are relieved, the key link for success of breeding of the Chongqing strawberry production seedlings is provided, and therefore a method for breeding the strawberry production seedlings by utilizing a natural barrier is provided.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects, provide a method for breeding strawberry production seedlings by utilizing a natural barrier, effectively overcome the adverse effect on strawberry production seedlings caused by high temperature, improve the success rate of seedling breeding and effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for breeding strawberry seedlings by utilizing a natural barrier comprises the following steps:
1) variety selection: selecting excellent strawberry varieties suitable for the climatic features of Chongqing areas, such as Xiangye, Hongyu, Hongyan or Miaoxiangqi;
2) selecting a stock plant: selecting a first-generation virus-free seedling or a second-generation virus-free seedling as a stock plant for breeding strawberry production seedlings;
3) selecting a nursery land: selecting land with the elevation of 600-900 m, flat terrain, convenient irrigation and drainage, loose and fertile soil, and the shady land with mountain forest on both sides, wherein the direct solar irradiation time is not more than 5 hours;
4) preparing a seedbed: applying fertilizer into soil according to the soil fertilizer condition, deeply ploughing and harrowing to form a high furrow with the furrow width of 1.6 meters, the furrow height of 20 centimeters and the furrow width of 30 centimeters, and making side furrows at the periphery of the nursery land with the furrow depth of 30-50 centimeters;
5) planting the stock plant: open field seedling culture is carried out for field planting in Chongqing areas for 4 months, closed weeding is carried out on the ridge surface 5-7 days before planting, double-row 'pin' -shaped field planting is carried out, the plant spacing is 50-80 cm, and about 1000 plants are planted per mu;
6) water content management: watering thoroughly immediately after the parent plant is fixedly planted, and supplementing water when the leaf edges of the parent seedlings have no water drops in the early morning in the seedling period;
7) the fertilization scheme is as follows: topdressing is carried out for 2-3 times before 7 months, 5-10 kilograms of nitrogen fertilizer are applied to each mu every time, the nitrogen fertilizer is stopped in 7 months after every 10-15 days, and then topdressing is carried out outside roots;
8) soil management: cultivating and weeding after the stock plant survives;
9) promoting generation of stolons: spraying gibberellin once after the parent plant is planted and survived, wherein the concentration of the gibberellin is 50mg/L, and each plant is 5-10 ml, and spraying the gibberellin to the seedling core;
10) picking flowers and thinning leaves of the mother plant: removing inflorescences, old leaves and diseased leaves of the stock plant in time, and cutting off all leaves of the stock plant after enough seedlings are produced in the field;
11) and (3) drawing and pressing stolons: after the stolons are extracted from the stock plant, combing the stolons in time, and pressing the seedlings by using seedling raising forks or fine soil to ensure that the stolons are uniformly distributed on the surface of the ridge, so as to ensure that the distance between the sub-seedlings is not less than 10 cm;
12) removing redundant stolons: after 30-50 seedlings are reserved for each plant, the stolons can be subjected to pinching, the seedling propagation amount is controlled within 5 ten thousand plants per mu, and the over-dense stolons generated in the later stage are removed;
13) and (3) pest control: the anthracnose, leaf spot, powdery mildew, aphid and red spider are detected in time and controlled mainly.
Further, 1500-3000 kg of decomposed organic fertilizer, 30-50 kg of calcium superphosphate and 5-10 kg of potassium sulfate are applied to each mu in the step 4).
Further, transplanting with soil during field planting in the step 5), removing old leaves and inflorescences, and enabling stems of seedlings to be flush with the ground.
Further, 0.2-0.5% potassium dihydrogen phosphate solution is adopted in the step 7) for topdressing 2-3 times outside roots, and 1 time every 10 days.
Further, 1000-1200 times of 45% prochloraz microemulsion is adopted for spraying in step 13) for preventing and treating strawberry anthracnose, and the application is carried out for 3-5 times at intervals of 7-10 days each time.
Further, the leaf spot prevention and treatment in the step 13) can be carried out by spraying 800-1000 times of liquid of 70% thiophanate methyl or 80% mancozeb wettable powder, and the application is carried out for 3-5 times at intervals of 7 days.
Further, in the step 13), 250g/L of pyraclostrobin missible oil 2000-fold liquid is adopted for spraying powdery mildew, and the application is carried out for 3-5 times at intervals of 10 days.
Further, 5000-time liquid spraying of 10% acetamiprid microemulsion or 2000-time liquid spraying of 10% imidacloprid wettable powder is adopted for aphid control in the step 13).
Further, 2500 times of liquid of 20% pyridaben wettable powder is sprayed for preventing and controlling red spiders in the step 13).
Compared with the prior art, the invention has the beneficial effects that: the method for breeding strawberry seedlings by using the natural barrier has the following advantages:
the method has the advantages that characteristics of Chongqing three-dimensional climate are fully utilized, a proper altitude gradient and unique natural land conditions are selected to form a natural barrier for seedling culture and shading, sunshade nets are not needed to cover and shade, water is saved, labor is saved, matched variety selection, stock plant selection, nursery land selection, seedbed preparation, stock plant field planting, water management, a fertilizing scheme, soil management, creeping stem promotion, flower picking and leaf thinning of the stock plant, creeping stem leading, excessive creeping stem removal, pest control and the like are carried out to realize breeding of high-quality strawberry production seedlings, and a simple, convenient and easy breeding method is provided for breeding of Chongqing strawberry production seedlings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides the following technical scheme:
the first embodiment is as follows:
a method for breeding strawberry seedlings by utilizing a natural barrier comprises the following steps:
1) variety selection: selecting excellent strawberry varieties suitable for the climatic features of Chongqing areas, such as Xiangye, Hongyu, Hongyan or Miaoxiangqi;
2) selecting a stock plant: selecting a first-generation virus-free seedling or a second-generation virus-free seedling as a stock plant for breeding strawberry production seedlings; the mother plants require pure plant varieties, strong growth, developed root systems, no plant diseases and insect pests and uniform growth vigor;
3) selecting a nursery land: selecting land with the elevation of 600-900 m, flat terrain, convenient irrigation and drainage, loose and fertile soil, and the shady land with mountain forest on both sides, wherein the direct solar irradiation time is not more than 5 hours;
4) preparing a seedbed: applying fertilizer into soil according to the soil fertilizer condition, deeply ploughing and harrowing to form a high furrow with the furrow width of 1.6 meters, the furrow height of 20 centimeters and the furrow width of 30 centimeters, and making side furrows with the furrow depth of 30 centimeters at the periphery of the nursery land;
1500 kg of decomposed organic fertilizer, 30 kg of calcium superphosphate and 5 kg of potassium sulfate are applied to each mu;
5) planting the stock plant: open field seedling culture is carried out for field planting in Chongqing areas for 4 months, the ridge surface is sealed and weeded 5 days before planting, double-row planting in a shape like Chinese character 'pin' is carried out, the plant spacing is 50 cm, and about 1000 plants are planted per mu;
transplanting with soil during field planting, removing old leaves and inflorescences, and aligning stem of seedling core with ground
6) Water content management: watering thoroughly immediately after the parent plant is fixedly planted, and supplementing water when the leaf edges of the parent seedlings have no water drops in the early morning in the seedling period; the soil in the whole seedling raising period is kept moist, the accumulated water in the furrow on the surface of the ridge is avoided, and the creeping stems are favorably pricked into the roots;
7) the fertilization scheme is as follows: topdressing nitrogen fertilizer 2 times before 7 months, 5 kg per mu each time, once every 10 days, stopping using nitrogen fertilizer in 7 months, and then topdressing the roots; applying 0.2% potassium dihydrogen phosphate solution for topdressing 2 times, 1 time every 10 days;
8) soil management: cultivating and weeding after the stock plant survives; the weeds are reduced from competing for nutrients, soil is kept loose, root penetration and soil penetration of stolon seedlings are facilitated, and after the stolons occur, intertillage weeding needs to be carried out to avoid damaging the stolons;
9) promoting generation of stolons: spraying gibberellin once after the parent plant is planted and survived, wherein the concentration of the gibberellin is 50mg/L, 5 milliliters of each plant is sprayed to the seedling core; in order to promote the creeping stems of the strawberries to occur as early as possible, the number of the pumping-out is increased;
10) picking flowers and thinning leaves of the mother plant: removing inflorescences, old leaves and diseased leaves of a mother plant in time, supplying concentrated nutrition to the young seedlings, and cutting off all leaves of the mother plant after enough seedlings are produced in the field, so that ventilation and light transmission in the field are improved, and the occurrence of plant diseases and insect pests is reduced;
11) and (3) drawing and pressing stolons: after the stolons are extracted from the stock plant, combing the stolons in time, and pressing the seedlings by using seedling raising forks or fine soil to ensure that the stolons are uniformly distributed on the surface of the ridge, so as to ensure that the distance between the sub-seedlings is not less than 10 cm;
12) removing redundant stolons: after 30 seed seedlings are reserved on each plant, the stolons can be subjected to pinching, the seedling propagation amount is controlled within 5 ten thousand plants per mu, the excessive stolons generated in the later period are removed, and ventilation and light transmission as well as reasonable nutrition area are ensured;
13) and (3) pest control: the anthracnose, leaf spot, powdery mildew, aphid and red spider are detected and controlled in time;
1000-time liquid spraying of 45% prochloraz microemulsion is adopted for preventing and treating strawberry anthracnose, the application is carried out for 3 times, and the interval is 7 days each time; the preparation can be used for preventing and treating leaf spot disease by spraying 800 times of solution of 70% thiophanate methyl or 80% mancozeb wettable powder for 3 times at intervals of 7 days; spraying 2000 times of pyraclostrobin missible oil at a dose of 250g/L for powdery mildew for 3 times at intervals of 10 days; 5000-time liquid spray of 10% acetamiprid microemulsion or 2000-time liquid spray of 10% imidacloprid wettable powder is adopted for aphid control; the red spider is controlled by spraying 2500 times of 20% pyridaben wettable powder.
Example two:
a method for breeding strawberry seedlings by utilizing a natural barrier comprises the following steps:
1) variety selection: selecting excellent strawberry varieties suitable for the climatic features of Chongqing areas, such as Xiangye, Hongyu, Hongyan or Miaoxiangqi;
2) selecting a stock plant: selecting a first-generation virus-free seedling or a second-generation virus-free seedling as a stock plant for breeding strawberry production seedlings; the mother plants require pure plant varieties, strong growth, developed root systems, no plant diseases and insect pests and uniform growth vigor;
3) selecting a nursery land: selecting land with the elevation of 600-900 m, flat terrain, convenient irrigation and drainage, loose and fertile soil, and the shady land with mountain forest on both sides, wherein the direct solar irradiation time is not more than 5 hours;
4) preparing a seedbed: applying fertilizer into soil according to the soil fertilizer condition, deeply ploughing and harrowing to form a high furrow with the furrow width of 1.6 meters, the furrow height of 20 centimeters and the furrow width of 30 centimeters, and making the furrow depth of 40 centimeters at the periphery of the nursery land;
2200 kg of decomposed organic fertilizer, 40 kg of calcium superphosphate and 7 kg of potassium sulfate are applied to each mu of the fertilizer;
5) planting the stock plant: open field seedling culture is carried out for field planting in Chongqing areas for 4 months, the ridge surface is sealed and weeded 6 days before planting, double-row planting in a shape like Chinese character 'pin' is carried out, the plant spacing is 60 cm, and about 1000 plants are planted per mu;
transplanting with soil during field planting, removing old leaves and inflorescences, and aligning stem of seedling core with ground
6) Water content management: watering thoroughly immediately after the parent plant is fixedly planted, and supplementing water when the leaf edges of the parent seedlings have no water drops in the early morning in the seedling period; the soil in the whole seedling raising period is kept moist, the accumulated water in the furrow on the surface of the ridge is avoided, and the creeping stems are favorably pricked into the roots;
7) the fertilization scheme is as follows: topdressing nitrogen fertilizer 3 times before 7 months, 7 kilograms per mu each time, one time at intervals of 12 days, stopping using nitrogen fertilizer in 7 months, and then topdressing the roots; applying 0.3% potassium dihydrogen phosphate solution for topdressing 2 times, 1 time every 10 days;
8) soil management: cultivating and weeding after the stock plant survives; the weeds are reduced from competing for nutrients, soil is kept loose, root penetration and soil penetration of stolon seedlings are facilitated, and after the stolons occur, intertillage weeding needs to be carried out to avoid damaging the stolons;
9) promoting generation of stolons: spraying gibberellin once after the parent plant is planted and survived, wherein the concentration of the gibberellin is 50mg/L, 8 milliliters of each plant is sprayed to the seedling core; in order to promote the creeping stems of the strawberries to occur as early as possible, the number of the pumping-out is increased;
10) picking flowers and thinning leaves of the mother plant: removing inflorescences, old leaves and diseased leaves of a mother plant in time, supplying concentrated nutrition to the young seedlings, and cutting off all leaves of the mother plant after enough seedlings are produced in the field, so that ventilation and light transmission in the field are improved, and the occurrence of plant diseases and insect pests is reduced;
11) and (3) drawing and pressing stolons: after the stolons are extracted from the stock plant, combing the stolons in time, and pressing the seedlings by using seedling raising forks or fine soil to ensure that the stolons are uniformly distributed on the surface of the ridge, so as to ensure that the distance between the sub-seedlings is not less than 10 cm;
12) removing redundant stolons: after 40 seed seedlings are reserved on each plant, the stolons can be subjected to pinching, the seedling propagation amount is controlled within 5 ten thousand plants per mu, the excessive stolons generated in the later period are removed, and ventilation and light transmission as well as reasonable nutrition area are ensured;
13) and (3) pest control: the anthracnose, leaf spot, powdery mildew, aphid and red spider are detected and controlled in time;
1100-time liquid spraying of 45% prochloraz microemulsion is adopted for preventing and treating strawberry anthracnose, the application is carried out for 4 times, and the interval is 8 days each time; the pesticide can be used for preventing and treating leaf spot disease by spraying 900 times of solution of 70% thiophanate methyl or 80% mancozeb wettable powder for 4 times at intervals of 7 days; spraying 2000 times of pyraclostrobin missible oil at a dose of 250g/L for powdery mildew for 4 times at intervals of 10 days; 5000-time liquid spray of 10% acetamiprid microemulsion or 2000-time liquid spray of 10% imidacloprid wettable powder is adopted for aphid control; the red spider is controlled by spraying 2500 times of 20% pyridaben wettable powder.
Example three:
a method for breeding strawberry seedlings by utilizing a natural barrier comprises the following steps:
1) variety selection: selecting excellent strawberry varieties suitable for the climatic features of Chongqing areas, such as Xiangye, Hongyu, Hongyan or Miaoxiangqi;
2) selecting a stock plant: selecting a first-generation virus-free seedling or a second-generation virus-free seedling as a stock plant for breeding strawberry production seedlings; the mother plants require pure plant varieties, strong growth, developed root systems, no plant diseases and insect pests and uniform growth vigor;
3) selecting a nursery land: selecting land with the elevation of 600-900 m, flat terrain, convenient irrigation and drainage, loose and fertile soil, and the shady land with mountain forest on both sides, wherein the direct solar irradiation time is not more than 5 hours;
4) preparing a seedbed: applying fertilizer into soil according to the soil fertilizer condition, deeply ploughing and harrowing to form a high furrow with the furrow width of 1.6 meters, the furrow height of 20 centimeters and the furrow width of 30 centimeters, and making a furrow with the furrow depth of 50 centimeters at the periphery of the nursery land;
3000 kg of decomposed organic fertilizer, 50 kg of calcium superphosphate and 10 kg of potassium sulfate are applied to each mu;
5) planting the stock plant: open field seedling culture is carried out for field planting in Chongqing areas for 4 months, the ridge surface is sealed and weeded 7 days before planting, double-row 'pin' -shaped field planting is carried out, the plant spacing is 80 cm, and about 1000 plants are planted per mu;
transplanting with soil during field planting, removing old leaves and inflorescences, and aligning stem of seedling core with ground
6) Water content management: watering thoroughly immediately after the parent plant is fixedly planted, and supplementing water when the leaf edges of the parent seedlings have no water drops in the early morning in the seedling period; the soil in the whole seedling raising period is kept moist, the accumulated water in the furrow on the surface of the ridge is avoided, and the creeping stems are favorably pricked into the roots;
7) the fertilization scheme is as follows: topdressing nitrogen fertilizer 3 times before 7 months, 10 kg per mu each time, 15 days at intervals, stopping using nitrogen fertilizer in 7 months, and then topdressing the roots; applying 0.5% potassium dihydrogen phosphate solution for topdressing 3 times, 1 time every 10 days;
8) soil management: cultivating and weeding after the stock plant survives; the weeds are reduced from competing for nutrients, soil is kept loose, root penetration and soil penetration of stolon seedlings are facilitated, and after the stolons occur, intertillage weeding needs to be carried out to avoid damaging the stolons;
9) promoting generation of stolons: spraying gibberellin once after the parent plant is planted and survived, wherein the concentration of the gibberellin is 50mg/L, 10 milliliters of each plant is sprayed to the seedling core; in order to promote the creeping stems of the strawberries to occur as early as possible, the number of the pumping-out is increased;
10) picking flowers and thinning leaves of the mother plant: removing inflorescences, old leaves and diseased leaves of a mother plant in time, supplying concentrated nutrition to the young seedlings, and cutting off all leaves of the mother plant after enough seedlings are produced in the field, so that ventilation and light transmission in the field are improved, and the occurrence of plant diseases and insect pests is reduced;
11) and (3) drawing and pressing stolons: after the stolons are extracted from the stock plant, combing the stolons in time, and pressing the seedlings by using seedling raising forks or fine soil to ensure that the stolons are uniformly distributed on the surface of the ridge, so as to ensure that the distance between the sub-seedlings is not less than 10 cm;
12) removing redundant stolons: after 50 seed seedlings are reserved on each plant, the stolons can be subjected to pinching, the seedling propagation amount is controlled within 5 ten thousand plants per mu, the excessive stolons generated in the later period are removed, and ventilation and light transmission as well as reasonable nutrition area are ensured;
13) and (3) pest control: the anthracnose, leaf spot, powdery mildew, aphid and red spider are detected and controlled in time;
the 45% prochloraz microemulsion 1200-time liquid is adopted for preventing and treating strawberry anthracnose, the application is carried out for 5 times, and the interval is 10 days each time; the 70% thiophanate methyl or 80% mancozeb wettable powder can be sprayed by 1000 times of liquid for preventing and treating the leaf spot, the application is carried out for 5 times, and the interval is 7 days; spraying 2000-time liquid of 250g/L pyraclostrobin missible oil for powdery mildew for 5 times at an interval of 10 days; 5000-time liquid spraying of 10% acetamiprid microemulsion or 2000-time liquid spraying of 10% imidacloprid wettable powder is adopted for aphid control; the red spider is prevented and treated by spraying 2500 times of 20% pyridaben wettable powder.
TABLE 1 comparison of production costs for natural barrier seedlings
TABLE 2 comparison of natural barrier seedling of red strawberry
TABLE 3 quality of seedlings grown in natural barrier
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, or to apply directly or indirectly to other related technical fields, which are all included in the scope of the present invention.
Claims (9)
1. A method for breeding strawberry seedlings by utilizing a natural barrier is characterized by comprising the following steps:
1) variety selection: selecting excellent strawberry varieties suitable for the climatic features of Chongqing areas, such as Xiangye, Hongyu, Hongyan or Miaoxiangqi;
2) selecting a stock plant: selecting a first-generation virus-free seedling or a second-generation virus-free seedling as a stock plant for breeding strawberry production seedlings;
3) selecting a nursery land: selecting land with the elevation of 600-900 m, flat terrain, convenient irrigation and drainage, loose and fertile soil, shady land blocks with mountain forests on two sides, and the direct solar irradiation time not more than 5 hours;
4) preparing a seedbed: applying fertilizer into soil according to the soil fertilizer condition, deeply ploughing and harrowing to form a high furrow with the furrow width of 1.6 meters, the furrow height of 20 centimeters and the furrow width of 30 centimeters, and making side furrows at the periphery of the nursery land with the furrow depth of 30-50 centimeters;
5) planting the stock plant: open field seedling culture is carried out for field planting in Chongqing areas for 4 months, closed weeding is carried out on the ridge surface 5-7 days before planting, double-row planting in a shape like a Chinese character pin is carried out, the plant spacing is 50-80 cm, and about 1000 plants are planted per mu;
6) water content management: watering thoroughly immediately after the parent plant is fixedly planted, and supplementing water when the leaf edges of the parent seedlings have no water drops in the early morning in the seedling period;
7) the fertilization scheme is as follows: topdressing is carried out for 2-3 times before 7 months, 5-10 kilograms of nitrogen fertilizer are applied to each mu every time, the nitrogen fertilizer is stopped in 7 months after 10-15 days, and then topdressing is carried out outside roots;
8) soil management: cultivating and weeding after the stock plant survives;
9) promoting generation of stolons: spraying gibberellin once after the parent plants are planted and survived, wherein the concentration of the gibberellin is 50mg/L, and each plant is 5-10 ml, and spraying the gibberellin to the seedling cores;
10) picking flowers and thinning leaves of the mother plant: removing inflorescences, old leaves and diseased leaves of the stock plant in time, and cutting off all leaves of the stock plant after enough seedlings are produced in the field;
11) and (3) drawing and pressing stolons: after the stolons are extracted from the stock plant, combing the stolons in time, and pressing the seedlings by using seedling raising forks or fine soil to ensure that the stolons are uniformly distributed on the surface of the ridge, so as to ensure that the distance between the sub-seedlings is not less than 10 cm;
12) removing redundant stolons: after 30-50 seedlings are reserved for each plant, the stolons can be subjected to pinching, the seedling propagation amount is controlled within 5 ten thousand plants per mu, and the over-dense stolons generated in the later stage are removed;
13) and (3) pest control: the anthracnose, leaf spot, powdery mildew, aphid and red spider are detected in time and controlled mainly.
2. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: 1500-3000 kg of decomposed organic fertilizer, 30-50 kg of calcium superphosphate and 5-10 kg of potassium sulfate are applied to each mu in the step 4).
3. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: and 5) transplanting with soil during field planting, removing old leaves and inflorescences, and enabling stems of seedling cores to be flush with the ground.
4. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: and 7) externally applying the fertilizer by using 0.2-0.5% potassium dihydrogen phosphate solution for 2-3 times every 10 days for 1 time.
5. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: and 13) spraying 1000-1200 times of 45% prochloraz microemulsion for preventing and treating strawberry anthracnose, wherein the application is carried out for 3-5 times at intervals of 7-10 days.
6. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: in the step 13), the leaf spot can be prevented and treated by spraying 800-1000 times of solution of 70% thiophanate methyl or 80% mancozeb wettable powder for 3-5 times at intervals of 7 days.
7. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: and 13) spraying 2000 times of the pyraclostrobin missible oil at a rate of 250g/L for powdery mildew, and applying the pesticide for 3-5 times at intervals of 10 days.
8. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: and 13) adopting 5000-time liquid spraying of 10% acetamiprid microemulsion or 2000-time liquid spraying of 10% imidacloprid wettable powder for aphid control.
9. The method for producing seedlings by using strawberries bred through a natural barrier as claimed in claim 1, wherein the method comprises the following steps: and 13) spraying 2500 times of liquid of 20% pyridaben wettable powder for preventing and treating red spiders.
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