CN114946495A - Shoot control and flower promotion method for potted castus paniculatus - Google Patents
Shoot control and flower promotion method for potted castus paniculatus 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
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
- A01G17/005—Cultivation methods
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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
- 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
Abstract
The invention discloses a tip-controlling and flower-promoting method for potted castus paniculatus, which comprises the following steps: s1: when the weather is good, preparing paclobutrazol with the concentration of 100-500mg/L, starting to apply the paclobutrazol from the early stage of flower bud differentiation, and treating once in spring for three times; s2: pruning the flower and shrub in the conventional summer after the first-season flowering period is finished; s3: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch in the flowerpot, applying compound fertilizer N-P-K1 with the ratio of 1:1 and 15g per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with returned soil, and watering enough water every day; s4: after half a month, compound fertilizer N-P-K4:1:8 is applied, 10g of each plant is watered enough water every day, the water and fertilizer control is performed in the flowering phase, and the frequency of water and fertilizer management is reduced.
Description
Technical Field
The invention relates to the technical field of garden plant cultivation, in particular to a tip-controlling and flower-promoting method for potted castus paniculatus.
Background
Vitex agnus-castus (Vitex agnus-castus) is flower and shrub of Vitex of Labiatae, has large flowering amount, long flowering time, high growth speed and trimming resistance, is an excellent plant of landscaping tree species, is suitable for planting in gardens of lakeside, stream land, two sides of roads or park arrangement and the like, and can be used as cut flowers or bonsais. Since the bluish purple inflorescence is open in midsummer, it is used in home gardening, landscaping and urban greening. However, the vitex agnus-castus has the disadvantages of vigorous growth, more branches, easy crown closure, poor ventilation and poor light transmission, so that the nutrient consumption is large, the branch filling and flower bud differentiation are influenced, and in urban gardens and forests, the branches are often messy and too dense, the flowering phase is short, the inflorescence is few, the concentration is not high, and the landscape effect is influenced. In order to realize the management of crown shape control and flowering phase with low cost, a method for controlling tip and promoting flower growth of potted castus spicatus with simple operation and low cost is urgently needed to solve the technical problems.
In view of this, the invention is especially proposed.
Disclosure of Invention
The invention aims to provide a tip-controlling and flower-promoting method for potted castus agnus-castus, which is cost-saving, efficient, convenient and fast to operate, capable of delaying the growth of new branches, increasing the number of new branches, enabling leaf colors to be more emerald green, higher in flowering rate, increasing the number of florescence, advancing the flowering period, beneficial to improving the probability of multiple flowering periods, more concentrated in flowering period, and capable of improving ornamental value and environmental safety, has a wide application prospect, and is beneficial to popularization and application.
In order to achieve the aim, the invention provides a shoot-controlling flower-promoting method of potted castus spicata, which comprises the following steps:
s1: applying paclobutrazol: when the weather is good, preparing paclobutrazol with the concentration of 100-500mg/L, starting to apply the paclobutrazol from the early stage of flower bud differentiation, treating the paclobutrazol once every 4-month 9 days, 4-month 15 days and 4-month 25 days in spring for three times, wherein each plant is drenched for 1L each time, and the last application of the paclobutrazol is carried out in the inflorescence growth period to avoid the severe weather of wind and rain;
s2: conventional trimming in summer to shorten the shoot length slightly: the flower shrubs are trimmed in the conventional summer after the flowering period of the first season is finished within 6 and 30 days, the aim is to effectively control the spindling of spring shoots, promote the sprouting of autumn shoots and the transformation of flower buds, enable the crown shapes to be more compact, increase the flower quantity of the second season, enable the flowering period of the second season to be more concentrated and improve the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying a compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch in the flowerpot, applying 15g of the compound fertilizer N-P-K1 in a ratio of 1:1 per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day, keeping soil moist, improving the efficiency of water and fertilizer absorption, and promoting growth;
s4: and after half a month, applying compound fertilizer N-P-K4:1:8, 10g per plant, promoting flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
Preferably, in S1, the concentration of paclobutrazol is 100-350mg/L, and if the tip control effect is required to be stronger, the highest concentration in the range can be selected.
Preferably, in S2, the summer normal pruning light cutback is mainly based on the residual inflorescence, the flowering phase is ended, and pruning is performed immediately, and meanwhile, the branch with the ground and the branch with the surplus length are pruned.
Preferably, in the step S3, after conventional pruning in summer, compound fertilizers are applied in time, and water and fertilizer are coupled to promote growth of autumn tips.
Preferably, in the S3, an annular fertilizing ditch is opened along the 20-25cm outside of the root of the tree.
Preferably, in the S3, the depth of the annular fertilizing ditch is 15-20 cm.
The invention provides a tip-controlling and flower-promoting method of potted castus spicata.
1. The cultivation and maintenance of the vitex agnus-castus are carried out by combining the paclobutrazol tip control and flower promotion with water and fertilizer management after summer pruning, the cultivation and maintenance method is scientific and reasonable, the length of a new branch can be effectively controlled, the inflorescence number of the vitex agnus-castus is improved, the flowering rate is higher, the flowering period is slightly advanced, the probability of multiple flowering periods is increased, and the ornamental value is improved.
2. The method of fixed-point root irrigation of the paclobutrazol reduces the pollution of residual paclobutrazol auxiliary agent generated by widely spraying on the leaf surface to air and water, and effectively improves the environmental safety.
Detailed Description
The present invention will be further described with reference to specific examples to assist understanding of the invention.
The invention provides a tip-controlling and flower-promoting method of potted castus spicata, which comprises the following steps:
s1: applying paclobutrazol: when the weather is good, preparing paclobutrazol with the concentration of 100-500mg/L, starting to apply the paclobutrazol from the early stage of flower bud differentiation, treating once every 4 months, 9 days, 4 months, 15 days and 4 months, 25 days in spring for three times, drenching 1L of roots of each plant every time, and applying the flower bud differentiation process for the last time to be the growth period of inflorescence so as to avoid the severe weather of wind and rain; preferably, the concentration of the paclobutrazol is configured to be 100-350mg/L, and if the tip control effect is required to be stronger, the highest concentration in the range of 100-350mg/L can be selected.
S2: conventional trimming in summer to shorten the shoot length slightly: the flower shrubs are trimmed in the conventional summer after the flowering period of the first season is finished within 6 and 30 days, the aim is to effectively control the spindling of spring shoots, promote the sprouting of autumn shoots and the transformation of flower buds, enable the crown shapes to be more compact, increase the flower quantity of the second season, enable the flowering period of the second season to be more concentrated and improve the ornamental effect; preferably, the conventional pruning in summer is mainly carried out on the light cutoffs by taking residual inflorescences as main parts, the flowering phase is ended, and pruning is carried out immediately while pruning branches sticking to the ground and growing up branches.
S3: and (3) water and fertilizer management after pruning: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch with the depth of 15-20cm from the root to the outside 20-25cm in the flowerpot, applying compound fertilizer N-P-K1:1: 15g per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day, keeping the soil moist, improving the efficiency of water and fertilizer absorption, and promoting growth; preferably, compound fertilizer is applied in time after conventional pruning in summer, and water and fertilizer are coupled to promote growth of autumn shoots.
S4: and after half a month, applying compound fertilizer N-P-K4:1:8 of 10g per plant to promote flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
Example 1:
s1: applying paclobutrazol: when the weather is good, preparing paclobutrazol with the concentration of 100mg/L, applying the paclobutrazol from the early stage of flower bud differentiation, treating the paclobutrazol once every 4 months, 9 days, 4 months, 15 days and 4 months, 25 days in spring for three times, wherein each plant is drenched with 1L of roots every time, and the flower bud differentiation process applied for the last time is the growth period of inflorescence, so that the weather is bad;
s2: conventional trimming in summer to shorten the shoot length slightly: the flower shrubs are trimmed in the conventional summer after the flowering period of the first season is finished within 6 and 30 days, the aim is to effectively control the spindling of spring shoots, promote the sprouting of autumn shoots and the transformation of flower buds, enable the crown shapes to be more compact, increase the flower quantity of the second season, enable the flowering period of the second season to be more concentrated and improve the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch with the depth of 20cm from the root to the outside 20cm in the flowerpot, applying compound fertilizer N-P-K1 with the ratio of 1:1 and 15g per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day to keep soil moist, improving the efficiency of water and fertilizer absorption and promoting growth;
s4: and after half a month, applying compound fertilizer N-P-K4:1:8, 10g per plant, promoting flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
As shown in tables 1-4, the application of paclobutrazol has little influence on the number of new branches and crown shape of plants in the first season, the new branches in the second season are 163.88% compared with the control example, the plant height is reduced by 15.29% compared with the control example, the tip control and growth inhibition effects are better in the second season, and the plants are more compact and beautiful. The growth of new shoots is resisted to a certain extent, the spring shoot length of the branches is inhibited by 14.12 percent compared with the control example, and the autumn shoot length is shortened by 19.13 percent compared with the control example. The internode length of the spring shoot branch is 22.28 percent less than that of the control example, and the internode length of the autumn shoot branch is 16.38 percent longer than that of the control example respectively. The growth amount of the first flowering branch diameter is respectively reduced by 7.07 percent compared with the control example, and the growth amount of the second flowering branch diameter is reduced by 7.12 percent. The relative content SPAD of chlorophyll is higher, and the leaf color is more emerald green. The number of florets in the first season is increased by 53.75% compared with the control example, and the number of florets in the second season is increased by 72.07% compared with the control example. The maximum flowering rate of the two-season flowering phase reaches more than 92%, the two-season flowering phase is opened about 5 days, the flowering phase is about 15-17 days, and the flowering phase is more concentrated.
Example 2:
s1: applying paclobutrazol: when the weather is good, preparing paclobutrazol with the concentration of 200mg/L, applying the paclobutrazol from the early stage of flower bud differentiation, treating the paclobutrazol once every 4 months, 9 days, 4 months, 15 days and 4 months, 25 days in spring for three times, wherein each plant is drenched with 1L of roots every time, and the flower bud differentiation process applied for the last time is the growth period of inflorescence, so that the weather is bad;
s2: conventional trimming in summer to shorten the shoot length slightly: pruning the flowering shrubs in conventional summer after the flowering period of the first season is finished within 6 and 30 days, aiming at effectively controlling the excessive growth of spring shoots, promoting the germination of autumn shoots and the transformation of flower buds, enabling the crowns to be more compact, increasing the flower amount of the second season, enabling the flowering period of the second season to be more concentrated and improving the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch with the depth of 15cm from the root to the outside 25cm in the flowerpot, applying compound fertilizer N-P-K1 with the ratio of 1:1 and 15g per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day to keep soil moist, improving the efficiency of water and fertilizer absorption and promoting growth;
s4: and after half a month, applying compound fertilizer N-P-K4:1:8 of 10g per plant to promote flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
As shown in tables 1-4, the new branches and plant heights in the second season of the tip-controlling and flower-promoting method are 149.66% and 17.82% respectively compared with those in the control example. The growth of the spring shoot and the growth of the autumn shoot of the branch are respectively inhibited by 13.97 percent and 25.44 percent compared with the control example, and the lengths between the spring shoot branch and the autumn shoot are 22.28 percent and 35.89 percent less than the control example. The growth amounts of the spring shoot and the autumn shoot are respectively reduced by 2.88 percent and 3.75 percent compared with the control example. The relative content of chlorophyll, SPAD, is slightly high, and the color of the leaves is emerald green. The florescence number of the first season is increased by 45.64 percent compared with the control example, and the florescence numbers of the first season and the second season are increased by 6.63 percent and 62.75 percent respectively compared with the control example. The maximum flowering rate of the two-season flowering period reaches more than 95%. The two-season flowering phase of the plant applied with paclobutrazol is about 5 days earlier than that of the control example, the flowering phase is about 15-16 days, and the flowering phase is more concentrated.
Example 3:
s1: applying paclobutrazol: when the weather is good, 350mg/L paclobutrazol is prepared, the paclobutrazol is applied from the early stage of flower bud differentiation, the paclobutrazol is treated once every 4 months and 9 days, 4 months and 15 days and 4 months and 25 days in spring for three times, each plant is drenched with 1L of roots every time, the last time of application is in the growth period of inflorescence, and the weather is bad;
s2: conventional trimming in summer to shorten the shoot length slightly: the flower shrubs are trimmed in the conventional summer after the flowering period of the first season is finished within 6 and 30 days, the aim is to effectively control the spindling of spring shoots, promote the sprouting of autumn shoots and the transformation of flower buds, enable the crown shapes to be more compact, increase the flower quantity of the second season, enable the flowering period of the second season to be more concentrated and improve the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch with the depth of 18cm from the root to the outside 22cm in the flowerpot, applying compound fertilizer N-P-K1 with the ratio of 1:1 and 15g per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day to keep soil moist, improving the efficiency of water and fertilizer absorption and promoting growth;
s4: and after half a month, applying compound fertilizer N-P-K4:1:8, 10g per plant, promoting flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
As shown in tables 1-4, the tip-controlling and flower-promoting method has little influence on the number of new branches and crown shapes of the plants in the first flowering season, the number of new branches in the second flowering season is 162.69% compared with the control example, and the plant height is reduced by 33.62% compared with the control example. The spring shoot and autumn shoot length of the branch are respectively inhibited by 17.06 percent and 37.14 percent compared with the control example. The internode length of the spring shoot and the autumn shoot is 22.80 percent and 48.08 percent less than that of the control example. The growth amounts of the spring shoot and the autumn shoot are respectively reduced by 3.66 percent and 11.61 percent compared with the control example. The relative content of chlorophyll, SPAD, is high, and the leaves are emerald green. The number of florets in the first season is increased by 43.57 percent compared with the control example, and the number of florets in the first season and the second season is increased by 6.63 percent and 74.50 percent respectively compared with the control example. The maximum flowering rate of the two-season flowering period reaches more than 94-96%. The flowering phases of the plants applied with paclobutrazol are about 5 days earlier than those of the control example, the flowering phases are about 13-16 days, and the flowering phases are more concentrated.
Example 4:
s1: applying paclobutrazol: when the weather is good, preparing paclobutrazol with the concentration of 500mg/L, starting to apply the paclobutrazol from the early stage of flower bud differentiation, treating once every 4 months, 9 days, 4 months, 15 days and 4 months, 25 days in spring for three times, wherein each plant is drenched with 1L of roots every time, and the flower bud differentiation process applied for the last time is the growth period of inflorescence, so that the severe weather of wind and rain is avoided;
s2: conventional trimming in summer to shorten the shoot length slightly: pruning the flowering shrubs in conventional summer after the flowering period of the first season is finished within 6 and 30 days, aiming at effectively controlling the excessive growth of spring shoots, promoting the germination of autumn shoots and the transformation of flower buds, enabling the crowns to be more compact, increasing the flower amount of the second season, enabling the flowering period of the second season to be more concentrated and improving the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch with the depth of 17cm from the root to the outside 23cm in the flowerpot, applying compound fertilizer N-P-K1 with the ratio of 1:1 and 15g per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day to keep soil moist, improving the efficiency of water and fertilizer absorption and promoting growth;
s4: and after half a month, applying compound fertilizer N-P-K4:1:8, 10g per plant, promoting flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
As shown in tables 1-4, when the paclobutrazol is used at a dosage of 500ppm, the new branches are 154.95% compared with the control example, the plant height is reduced by 48.39% compared with the control example, and the tip control and growth inhibition effect is the best in the second season, so that the plant is more compact and beautiful. Has stronger resistance to the growth of young shoots, the growth of spring shoots is inhibited by 22.18 percent compared with the growth of a control example, and the growth of autumn shoots is shortened by 58.85 percent compared with the growth of a control example. The lengths between the spring shoot and the autumn shoot are 31.09 percent and 75.61 percent less than those of the comparative example. The number of internodes in the second season is 0-1. The growth amounts of the spring shoot and the autumn shoot are respectively reduced by 13.61 percent and 5.36 percent compared with the control example. The chlorophyll has high relative content SPAD value and emerald green leaf color. The florescence number in the first season is increased by 28.83 percent compared with the comparison example, the florescence numbers in the first season and the second season are respectively increased by 6.40 percent and 67.08 percent compared with the comparison example, and the maximum florescence rate in the two seasons reaches more than 93-95 percent. The flowering phase was earlier in both seasons. The suspected phytotoxicity phenomenon that leaves are wrinkled and inflorescences are short is found in the second season florescence survey, but the phytotoxicity phenomenon is light in the test. However, the use safety is still to be improved as compared with examples 1, 2 and 3.
Comparative example:
s1: applying clear water: when the weather is good, the fresh-keeping agent is applied with clear water, the fresh-keeping agent is treated once every 4 months, 9 days, 4 months, 15 days and 4 months, 25 days in spring for three times, each plant is drenched with 1L of roots every time, and the differentiation process of the fresh-keeping agent applied for the last time is the growth period of inflorescence, so that the weather is bad.
S2: conventional trimming in summer to shorten the shoot length slightly: pruning the flowering shrubs in conventional summer after the flowering period of the first season is finished within 6 and 30 days, aiming at effectively controlling the excessive growth of spring shoots, promoting the germination of autumn shoots and the transformation of flower buds, enabling the crowns to be more compact, increasing the flower amount of the second season, enabling the flowering period of the second season to be more concentrated and improving the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch with the depth of 18cm from the root to the outside at a position 22cm along the root in a flowerpot, applying compound fertilizer N-P-K1:1: 15g for each plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, sufficiently watering every day to keep soil moist, improving the efficiency of water and fertilizer absorption and promoting growth;
s4: after half a month, applying compound fertilizer N-P-K4:1:8, 10g per plant to promote flower bud differentiation, watering enough water every day, keeping soil moist, improving the efficiency of water and fertilizer absorption, promoting growth, controlling water and fertilizer in the flowering period, and reducing the frequency of water and fertilizer management.
As shown in tables 1-4, the branches are excessively grown and disorderly, the inflorescences are few, the flowering rate is only 88%, the flowering is irregular, the flowering period is not concentrated, and the ornamental value is low.
TABLE 1 Effect of different paclobutrazol concentrations on the growth of Vitex agnus-castus during the first flowering phase
TABLE 2 Effect of different paclobutrazol concentrations on the growth of Vitex agnus-castus during the second flowering phase
TABLE 3 Effect of different paclobutrazol concentrations on the quality of first-season flower formation of Vitex agnus-castus
TABLE 4 Effect of different paclobutrazol concentrations on the quality of second-season flower formation of Vitex agnus-castus
Note: the rate of secondary flowering greater than 76% is single inflorescences and inflorescence length is represented using the measure of main inflorescence width.
The cultivation and maintenance of the vitex agnus-castus are carried out by combining the paclobutrazol tip control and flower promotion with water and fertilizer management after summer pruning, the cultivation and maintenance method is scientific and reasonable, the length of a new branch can be effectively controlled, the inflorescence number of the vitex agnus-castus is improved, the flowering rate is higher, the flowering period is slightly advanced, the probability of multiple flowering periods is increased, and the ornamental value is improved. The method of fixed-point root irrigation of the paclobutrazol reduces the pollution of residual paclobutrazol auxiliary agent generated by widely spraying on the leaf surface to air and water, and effectively improves the environmental safety.
The inventive concept is explained in detail herein using specific examples, which are only provided to help understanding the core idea of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. A shoot control and flower promotion method for potted Vitex agnus-castus is characterized by comprising the following steps:
s1: applying paclobutrazol: when the weather is good, preparing paclobutrazol with the concentration of 100-500mg/L, starting to apply the paclobutrazol from the early stage of flower bud differentiation, treating once every 4 months, 9 days, 4 months, 15 days and 4 months, 25 days in spring for three times, drenching 1L of roots of each plant every time, and applying the flower bud differentiation process for the last time to be the growth period of inflorescence so as to avoid the severe weather of wind and rain;
s2: conventional trimming in summer to shorten the shoot length slightly: the flower shrubs are trimmed in the conventional summer after the flowering period of the first season is finished within 6 and 30 days, the aim is to effectively control the spindling of spring shoots, promote the sprouting of autumn shoots and the transformation of flower buds, enable the crown shapes to be more compact, increase the flower quantity of the second season, enable the flowering period of the second season to be more concentrated and improve the ornamental effect;
s3: and (3) water and fertilizer management after pruning: applying a compound fertilizer to promote growth of autumn tips, opening an annular fertilizing ditch in the flowerpot, applying 15g of the compound fertilizer N-P-K1 in a ratio of 1:1 per plant, uniformly applying the compound fertilizer in the fertilizing ditch, covering with return soil, watering enough water every day, keeping soil moist, improving the efficiency of water and fertilizer absorption, and promoting growth;
s4: and after half a month, applying compound fertilizer N-P-K4:1:8, 10g per plant, promoting flower bud differentiation, watering enough water every day, keeping soil moist, improving the water and fertilizer absorption efficiency, promoting growth, controlling water and fertilizer in the flowering period, and reducing the water and fertilizer management frequency.
2. The method for controlling the shoot and promoting the flower of potted Vitex agnus-castus according to claim 1, wherein the concentration of paclobutrazol is set to be 100-350mg/L in S1.
3. The method for controlling shoots and promoting flowers of potted Vitex agnus-castus according to claim 1, wherein in S2, the normal pruning of light cutback in summer is mainly residual inflorescence, and the pruning is performed immediately after the flowering phase, and meanwhile, the pruning of field branches and bare branches is performed.
4. The method for controlling shoots and promoting flowers of potted Vitex agnus-castus according to claim 1, wherein in S3, after normal pruning in summer, compound fertilizers are applied in time, and water and fertilizer are coupled to promote growth of shoots in autumn.
5. The method for controlling shoots and promoting blossom of potted Vitex agnus-castus according to claim 1, wherein in S3, an open ring-shaped fertilizing ditch is formed 20-25cm outside the root of the tree.
6. The method for controlling the shoot and promoting the flowering of potted Vitex agnus-castus according to claim 1, wherein in S3, the depth of the annular fertilizing groove is 15-20 cm.
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