CN113841569A - Breeding method for improving cold resistance of pitaya - Google Patents
Breeding method for improving cold resistance of pitaya Download PDFInfo
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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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/005—Following a specific plan, e.g. pattern
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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
- A01G2/00—Vegetative propagation
- A01G2/10—Vegetative propagation by means of cuttings
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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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
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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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
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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
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/12—Supports for plants; Trellis for strawberries or the like
- A01G9/122—Stakes
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
The invention relates to the technical field of dragon fruit planting, and discloses a breeding method for improving cold resistance of dragon fruits, which comprises the following steps: s1: selecting seedlings, cutting the branches of the dragon fruits which grow in two years and are free of plant diseases and insect pests and have plump bud grafting into cutting strips of 15-20cm, standing for 5-7 days in an environment with the temperature of 15-20 ℃, and then soaking the branches in a thiophanate methyl solution for 20-25min for disinfection for later use; s2: preparing a potted plant, preparing a mud tile basin with good air permeability, disinfecting the mud tile basin, and then soaking the mud tile basin in clear water in a full-coverage manner, so that foul gas in air holes in the basin wall is discharged. According to the breeding method for improving the cold resistance of the dragon fruits, the transplanted seedlings can obtain sufficient illumination and nutrients through selection of land and environment in the step of shed planting preparation, the transparent plastic cloth can play a role in heat preservation of the interior of a greenhouse, the seedlings can grow healthily at a low temperature by matching with the use of a warm light, and the cold resistance of the seedlings is improved.
Description
Technical Field
The invention relates to the technical field of dragon fruit planting, in particular to a breeding method for improving cold resistance of dragon fruits.
Background
The pitaya belongs to the cactaceae, is a succulent plant with perennial climbing property, has long round or oval fruit, white or red pulp, fragrant taste and mild texture, mainly contains protein, dietary fiber and vitamins as nutritional ingredients, belongs to one of the fruits widely favored by people, is mainly planted in a planting place of the pitaya by sufficient illumination and proper temperature, is easy to freeze and cannot survive in winter, and when the temperature is lower than 3 ℃, the roots and the stems of the pitaya are threatened, so that the pitaya cannot be planted for a long time in most areas of China, and the survival rate of the roots and the plumpness of the pitaya can be influenced by cold weather in winter in proper areas.
Therefore, a breeding method for improving the cold resistance of the pitaya is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a breeding method for improving the cold resistance of pitaya, which has the advantages of improving the survival rate of seedlings, improving the maturity of fruits and the like, and solves the problem of low survival rate caused by the influence of low temperature in winter.
In order to achieve the purposes of improving the survival rate of seedlings and improving the maturity of fruits, the invention provides the following technical scheme: a breeding method for improving the cold resistance of pitaya comprises the following steps:
s1: selecting seedlings, cutting the branches of the dragon fruits which grow in two years and are free of plant diseases and insect pests and have plump bud grafting into cutting strips of 15-20cm, standing for 5-7 days in an environment with the temperature of 15-20 ℃, and then soaking the branches in a thiophanate methyl solution for 20-25min for disinfection for later use;
s2: preparing a pot culture, namely preparing a mud tile basin with good air permeability, disinfecting the mud tile basin, and performing full-coverage soaking by using clear water to discharge dirty air in air holes in the basin wall;
s3: cutting and potting, namely pouring prepared potting nutrient soil into a clay tile pot, inserting a wood stick with the diameter of 2-3cm into the middle of the clay tile pot, respectively planting a cutting strip on two sides of the wood stick and drawing the cutting strip by using a soft thin line, uniformly watering the surface of the nutrient soil, and spraying 500 times of carbendazim once;
s4: potting and maintaining, namely moving the potted plant to a sunny place after 5-7 days of potting, and supplementing moisture in the nutrient soil in time;
s5: preparing for greenhouse cultivation, selecting field blocks which are ventilated and exposed to the sun, fertile in soil and convenient to drain and irrigate, finely ditching soil, selecting 1300 kg of cow dung or chicken dung and 1000kg of rice husk ash for each mu of field, fully applying the mixture to the ground surface by 10-15cm under stirring, applying 100kg of calcium magnesium phosphate fertilizer to the ground surface by 7-10cm under fully mixing with the soil, fixedly installing a square greenhouse frame around the field, covering the greenhouse frame with transparent plastic cloth to form a planting greenhouse, wherein the greenhouse height is about 3 m;
s6: transplanting in a greenhouse, namely transplanting potted seedlings together with nutrient soil into the soil in the fifth step, wherein the interval between every two seedlings is 75-90cm, a growth promoting frame needs to be built around every two seedlings, and the seedlings and the growth promoting frame are fixed;
s7: periodic cultivation: during the seedling period, keeping the soil soft and moist, fully receiving natural light irradiation to the seedlings, keeping the stability in the shed to be not lower than 5 ℃, and performing pinching treatment after the branches of the seedlings grow to the height of 130-150 cm;
s8: and (3) periodic fertilization: after the plant seedlings grow, nitrogen, phosphorus and potassium organic fertilizers are applied at intervals of 2-3 months, the amount is 50 kg/mu, common fertilizers are applied once every 20-40 days during the growth period, the fertilizers are applied according to the dose of 500 kg/mu, the fertilizing amount is increased during the flowering period, the watering times are increased during the fruiting period, and the soil is kept moist.
Preferably, the clay tile basin in the second step is a round basin with the specification of 25-35cm width and 15-20cm depth, and the bottom of the basin is provided with air holes with the diameter of 2-4 cm.
Preferably, the nutrient soil for potted plants in the third step is prepared according to the proportion of 20:15:10:1 of the wet soil of the field, the chicken manure or the cow manure, the rice husk ash and the calcium magnesium phosphate fertilizer.
Preferably, the pot culture maintenance time in the fourth step is 10-15 days, the watering frequency is 5-7 times, and the average watering time is about 200-250ml each time, so that the watering amount can be properly supplemented or reduced by keeping the nutrient soil in a moist and loose state.
Preferably, the main frame of the planting greenhouse in the fifth step is built by a fixed steel frame, warm lamps are uniformly hung and installed in the planting greenhouse, and the transparent plastic cloth is detachably laid.
Preferably, in the seventh step, when the temperature is lower in winter, the warmers in the shed need to be turned on, the temperature in the shed is kept to be not lower than 5 ℃, when the sunlight is better in winter, the transparent plastic cloth needs to be detached, and the transparent plastic cloth needs to be laid outside the shed at night or when the temperature is lower, so that the air circulation in the shed needs to be ensured.
Preferably, in the eighth step, the times of applying common fertilizers are increased in the spring young sprout germination and fruit expansion period, the common fertilizers comprise cake dregs, chicken manure and pig manure according to a formula of 1:2:5, the nitrogen-phosphorus-potassium organic fertilizer is mainly a nitrogen fertilizer in 2-20 months, and the phosphorus-potassium fertilizer is mainly a phosphorus-potassium fertilizer after 20 months.
Compared with the prior art, the invention provides a breeding method for improving the cold resistance of pitaya, which has the following beneficial effects:
1. according to the breeding method for improving the cold resistance of the dragon fruits, through the potting preparation step, the clay tile pot with good air permeability is selected and used, the clay tile pot is cleaned and disinfected, the growth environment of the seedlings can be improved, the survival rate of the seedlings is improved, the seedlings can obtain sufficient nutrients in the initial stage through preparation of nutrient soil in the cuttage potting step, and the seedlings can be protected by certain growth in a wood stick traction mode.
2. According to the breeding method for improving the cold resistance of the dragon fruits, the transplanted seedlings can obtain sufficient illumination and nutrients through selection of land and environment in the step of shed planting preparation, the transparent plastic cloth can play a role in heat preservation of the interior of a greenhouse, the seedlings can grow healthily at a low temperature by matching with the use of a warm light, and the cold resistance of the seedlings is improved.
3. According to the breeding method for improving the cold resistance of the dragon fruits, the pinching treatment is carried out on the growing seedlings in the periodic cultivation step, so that concentrated nutrition can be used as the growth of the branches during the early growth of the seedlings, sufficient nutrients are improved for the branch growth of the subsequent branches, and the healthy growth of the seedlings in the early period is ensured.
4. According to the breeding method for improving the cold resistance of the pitaya, the nutrient supply in the plant seedling growth process is ensured through component fertilization in the periodic fertilization step, and the yield and the quality of the pitaya can be improved through the operation of applying different metered fertilizers in different periods.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the 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.
Referring to fig. 1, a breeding method for improving the cold resistance of pitaya includes the following steps:
s1: selecting seedlings, cutting the branches of the dragon fruits which grow in two years and are free of plant diseases and insect pests and have plump bud grafting into cutting strips of 15-20cm, standing for 5-7 days in an environment with the temperature of 15-20 ℃, and then soaking the branches in a thiophanate methyl solution for 20-25min for disinfection for later use;
s2: preparing a pot culture, namely preparing a mud tile basin with good air permeability, disinfecting the mud tile basin, and performing full-coverage soaking by using clear water to discharge dirty air in air holes in the basin wall;
s3: cutting and potting, namely pouring prepared potting nutrient soil into a clay tile pot, inserting a wood stick with the diameter of 2-3cm into the middle of the clay tile pot, respectively planting a cutting strip on two sides of the wood stick and drawing the cutting strip by using a soft thin line, uniformly watering the surface of the nutrient soil, and spraying 500 times of carbendazim once;
s4: potting and maintaining, namely moving the potted plant to a sunny place after 5-7 days of potting, and supplementing moisture in the nutrient soil in time;
s5: preparing for greenhouse cultivation, selecting field blocks which are ventilated and exposed to the sun, fertile in soil and convenient to drain and irrigate, finely ditching soil, selecting 1300 kg of cow dung or chicken dung and 1000kg of rice husk ash for each mu of field, fully applying the mixture to the ground surface by 10-15cm under stirring, applying 100kg of calcium magnesium phosphate fertilizer to the ground surface by 7-10cm under fully mixing with the soil, fixedly installing a square greenhouse frame around the field, covering the greenhouse frame with transparent plastic cloth to form a planting greenhouse, wherein the greenhouse height is about 3 m;
s6: transplanting in a greenhouse, namely transplanting potted seedlings together with nutrient soil into the soil in the fifth step, wherein the interval between every two seedlings is 75-90cm, a growth promoting frame needs to be built around every two seedlings, and the seedlings and the growth promoting frame are fixed;
s7: periodic cultivation: during the seedling period, keeping the soil soft and moist, fully receiving natural light irradiation to the seedlings, keeping the stability in the shed to be not lower than 5 ℃, and performing pinching treatment after the branches of the seedlings grow to the height of 130-150 cm;
s8: and (3) periodic fertilization: after the plant seedlings grow, nitrogen, phosphorus and potassium organic fertilizers are applied at intervals of 2-3 months, the amount is 50 kg/mu, common fertilizers are applied once every 20-40 days during the growth period, the fertilizers are applied according to the dose of 500 kg/mu, the fertilizing amount is increased during the flowering period, the watering times are increased during the fruiting period, and the soil is kept moist.
And selecting a round basin with the width of 25-35cm and the depth of 15-20cm as the mud tile basin in the second step, and arranging air holes with the diameter of 2-4cm at the basin bottom, so that the air permeability and the safety of the device are improved, and the roots and stems of the seedlings are prevented from being damaged due to water accumulation.
The nutrient soil for the potted plant in the third step is prepared according to the proportion of 20:15:10:1 of the wet soil of the field, the chicken manure or the cow manure, the rice husk ash and the calcium magnesium phosphate fertilizer, and sufficient nutrients are improved for early-stage cultivation of seedlings.
The pot culture maintenance time in the fourth step is 10-15 days, the watering times are 5-7 times, the average watering time is about 200 ml for each time, the watering amount can be properly supplemented or reduced by keeping the nutrient soil in a moist loose state, the watering amount is controlled, and the moisture absorption can be improved and the root and stem ulceration caused by excessive moisture can be prevented by using a small amount of watering methods for many times.
The main frame of the planting greenhouse is built by a fixed steel frame, warm lamps are evenly hung and installed in the planting greenhouse, the transparent plastic cloth is detachably paved, the transparent clinker can be matched with the warm lamps to be used at low temperature in cold winter, so that the temperature in the greenhouse is stable, the better control temperature is higher than 5 ℃, the growth and life of seedlings are prevented from being threatened by over-low stability, and the cold resistance of the seedlings is improved.
And seventhly, when the temperature is lower in winter, the warmers in the shed need to be turned on, the temperature in the shed is kept to be not lower than 5 ℃, the transparent plastic cloth needs to be detached when the sunlight is better in winter, the transparent plastic cloth is laid outside the shed at night or when the temperature is lower, the ventilation of air in the shed needs to be ensured, and the seedlings can be prevented from being influenced by the low temperature while the illumination is timely supplemented by detaching and installing the transparent plastic cloth.
And eighthly, increasing the times of applying common fertilizers in the spring young shoot germination and fruit expansion period, wherein the common fertilizers comprise cake dregs, chicken manure and pig manure according to a formula of 1:2:5, the nitrogen-phosphorus-potassium organic fertilizer is mainly used as a nitrogen fertilizer during 2-20 months, the phosphorus-potassium fertilizer is mainly used after 20 months, and the fertilizers with different dosages are increased for the seedlings in different periods, so that the seedlings can be supplemented with necessary and sufficient nutrients, and the growth of the seedlings and the maturity of fruits are guaranteed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A breeding method for improving the cold resistance of dragon fruits is characterized by comprising the following steps: the method comprises the following steps:
s1: selecting seedlings, cutting the branches of the dragon fruits which grow in two years and are free of plant diseases and insect pests and have plump bud grafting into cutting strips of 15-20cm, standing for 5-7 days in an environment with the temperature of 15-20 ℃, and then soaking the branches in a thiophanate methyl solution for 20-25min for disinfection for later use;
s2: preparing a pot culture, namely preparing a mud tile basin with good air permeability, disinfecting the mud tile basin, and performing full-coverage soaking by using clear water to discharge dirty air in air holes in the basin wall;
s3: cutting and potting, namely pouring prepared potting nutrient soil into a clay tile pot, inserting a wood stick with the diameter of 2-3cm into the middle of the clay tile pot, respectively planting a cutting strip on two sides of the wood stick and drawing the cutting strip by using a soft thin line, uniformly watering the surface of the nutrient soil, and spraying 500 times of carbendazim once;
s4: potting and maintaining, namely moving the potted plant to a sunny place after 5-7 days of potting, and supplementing moisture in the nutrient soil in time;
s5: preparing for greenhouse cultivation, selecting field blocks which are ventilated and exposed to the sun, fertile in soil and convenient to drain and irrigate, finely ditching soil, selecting 1300 kg of cow dung or chicken dung and 1000kg of rice husk ash for each mu of field, fully applying the mixture to the ground surface by 10-15cm under stirring, applying 100kg of calcium magnesium phosphate fertilizer to the ground surface by 7-10cm under fully mixing with the soil, fixedly installing a square greenhouse frame around the field, covering the greenhouse frame with transparent plastic cloth to form a planting greenhouse, wherein the greenhouse height is about 3 m;
s6: transplanting in a greenhouse, namely transplanting potted seedlings together with nutrient soil into the soil in the fifth step, wherein the interval between every two seedlings is 75-90cm, a growth promoting frame needs to be built around every two seedlings, and the seedlings and the growth promoting frame are fixed;
s7: periodic cultivation: during the seedling period, keeping the soil soft and moist, fully receiving natural light irradiation to the seedlings, keeping the stability in the shed to be not lower than 5 ℃, and performing pinching treatment after the branches of the seedlings grow to the height of 130-150 cm;
s8: and (3) periodic fertilization: after the plant seedlings grow, nitrogen, phosphorus and potassium organic fertilizers are applied at intervals of 2-3 months, the amount is 50 kg/mu, common fertilizers are applied once every 20-40 days during the growth period, the fertilizers are applied according to the dose of 500 kg/mu, the fertilizing amount is increased during the flowering period, the watering times are increased during the fruiting period, and the soil is kept moist.
2. The breeding method for improving the cold resistance of the pitaya according to claim 1, which is characterized in that: and the mud tile basin in the second step is a round basin with the specification of 25-35cm width and 15-20cm depth, and the bottom of the basin is provided with air holes with the diameter of 2-4 cm.
3. The breeding method for improving the cold resistance of the pitaya according to claim 1, which is characterized in that: the nutrient soil for potted plants in the third step is prepared from the wet soil of the field, the chicken manure or the cow manure, the rice husk ash and the calcium magnesium phosphate fertilizer in a ratio of 20:15:10: 1.
4. The breeding method for improving the cold resistance of the pitaya according to claim 1, which is characterized in that: the pot culture maintenance time in the fourth step is 10-15 days, the watering times are 5-7 times, the average watering time is about 200-.
5. The breeding method for improving the cold resistance of the pitaya according to claim 1, which is characterized in that: and fifthly, the main frame of the planting greenhouse is built by a fixed steel frame, warm lamps are uniformly hung and installed in the planting greenhouse, and the transparent plastic cloth is detachably laid.
6. The breeding method for improving the cold resistance of the pitaya according to claim 1, which is characterized in that: and seventhly, when the temperature is lower in winter, the warmers in the shed need to be turned on, the temperature in the shed is kept to be not lower than 5 ℃, the transparent plastic cloth needs to be detached when the sunlight is better in winter, and the transparent plastic cloth is laid outside the shed at night or when the temperature is lower, so that the ventilation of the air in the shed needs to be ensured.
7. The breeding method for improving the cold resistance of the pitaya according to claim 1, which is characterized in that: and eighthly, increasing the times of applying common fertilizers in the spring young sprout germination and fruit expansion period, wherein the common fertilizers comprise cake dregs, chicken manure and pig manure according to a formula of 1:2:5, the nitrogen-phosphorus-potassium organic fertilizer is mainly used as a nitrogen fertilizer during 2-20 months, and the phosphorus-potassium fertilizer is mainly used after 20 months.
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