CN112753467A - Cultivation method for enabling bougainvillea spectabilis to bloom for the second time after flowering phase - Google Patents
Cultivation method for enabling bougainvillea spectabilis to bloom for the second time after flowering phase Download PDFInfo
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- 241001316288 Bougainvillea spectabilis Species 0.000 title claims abstract description 54
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 title claims abstract description 38
- 238000012364 cultivation method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000004069 differentiation Effects 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 14
- 239000005648 plant growth regulator Substances 0.000 claims abstract description 10
- 230000001737 promoting effect Effects 0.000 claims abstract description 6
- 238000013138 pruning Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims abstract description 5
- 238000009966 trimming Methods 0.000 claims abstract description 3
- OIPMQULDKWSNGX-UHFFFAOYSA-N bis[[ethoxy(oxo)phosphaniumyl]oxy]alumanyloxy-ethoxy-oxophosphanium Chemical compound [Al+3].CCO[P+]([O-])=O.CCO[P+]([O-])=O.CCO[P+]([O-])=O OIPMQULDKWSNGX-UHFFFAOYSA-N 0.000 claims description 11
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- RMOGWMIKYWRTKW-UONOGXRCSA-N (S,S)-paclobutrazol Chemical compound C([C@@H]([C@@H](O)C(C)(C)C)N1N=CN=C1)C1=CC=C(Cl)C=C1 RMOGWMIKYWRTKW-UONOGXRCSA-N 0.000 claims description 5
- PRPINYUDVPFIRX-UHFFFAOYSA-N 1-naphthaleneacetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CC=CC2=C1 PRPINYUDVPFIRX-UHFFFAOYSA-N 0.000 claims description 5
- 239000005985 Paclobutrazol Substances 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 5
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 claims description 3
- UDPGUMQDCGORJQ-UHFFFAOYSA-N (2-chloroethyl)phosphonic acid Chemical compound OP(O)(=O)CCCl UDPGUMQDCGORJQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000005631 2,4-Dichlorophenoxyacetic acid Substances 0.000 claims description 2
- HXKWSTRRCHTUEC-UHFFFAOYSA-N 2,4-Dichlorophenoxyaceticacid Chemical compound OC(=O)C(Cl)OC1=CC=C(Cl)C=C1 HXKWSTRRCHTUEC-UHFFFAOYSA-N 0.000 claims description 2
- PWVXXGRKLHYWKM-UHFFFAOYSA-N 5-[2-(benzenesulfonyl)ethyl]-3-[(1-methylpyrrolidin-2-yl)methyl]-1h-indole Chemical compound CN1CCCC1CC(C1=C2)=CNC1=CC=C2CCS(=O)(=O)C1=CC=CC=C1 PWVXXGRKLHYWKM-UHFFFAOYSA-N 0.000 claims description 2
- 239000005976 Ethephon Substances 0.000 claims description 2
- JTEDVYBZBROSJT-UHFFFAOYSA-N indole-3-butyric acid Chemical compound C1=CC=C2C(CCCC(=O)O)=CNC2=C1 JTEDVYBZBROSJT-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 5
- 102000004190 Enzymes Human genes 0.000 description 4
- 108090000790 Enzymes Proteins 0.000 description 4
- 206010020649 Hyperkeratosis Diseases 0.000 description 4
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 230000012010 growth Effects 0.000 description 4
- 239000003895 organic fertilizer Substances 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 241000219477 Bougainvillea glabra Species 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 239000002881 soil fertilizer Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 241000219470 Mirabilis Species 0.000 description 1
- 241001130943 Phyllanthus <Aves> Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 239000003617 indole-3-acetic acid Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- SWGJCIMEBVHMTA-UHFFFAOYSA-K trisodium;6-oxido-4-sulfo-5-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulfonate Chemical compound [Na+].[Na+].[Na+].C1=CC=C2C(N=NC3=C4C(=CC(=CC4=CC=C3O)S([O-])(=O)=O)S([O-])(=O)=O)=CC=C(S([O-])(=O)=O)C2=C1 SWGJCIMEBVHMTA-UHFFFAOYSA-K 0.000 description 1
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- 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
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/10—Aromatic or araliphatic carboxylic acids, or thio analogues thereof; Derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N39/00—Biocides, pest repellants or attractants, or plant growth regulators containing aryloxy- or arylthio-aliphatic or cycloaliphatic compounds, containing the group or, e.g. phenoxyethylamine, phenylthio-acetonitrile, phenoxyacetone
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- A01N39/04—Aryloxy-acetic acids; Derivatives thereof
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- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings
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- A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
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Abstract
The invention discloses a cultivation method for enabling bougainvillea spectabilis to bloom for the second time after a flowering period. (1) After 6 months of flowering of bougainvillea spectabilis, digging soil along the outer side of the water dripping line of the canopy and cutting off roots; (2) then spraying a plant growth regulator to ensure that the bloomed flowers are all withered, trimming and pinching branches at the top ends of the bloomed flowers, removing buds which do not bloom at the top ends, and promoting flower bud differentiation; (3) controlling water while performing top pruning, wherein the water control time is 2-3 weeks, and stopping fertilizing to ensure that the surface of the current-year branches is wrinkled and the branches and leaves wither due to water shortage; (4) after 10-12 days of treatment in the step (3), spraying a plant growth regulator with concentration every 10-15 days, after new flower buds are formed initially, fertilizing and watering, and applying an auxiliary regulator every 3-5 days until flower buds bloom. The invention can lead the bougainvillea spectabilis to bloom again after the flowering phase, thereby effectively prolonging the flowering phase.
Description
Technical Field
The invention relates to the technical field of gardens, in particular to a cultivation method for enabling bougainvillea spectabilis to bloom for the second time after a flowering phase.
Background
Bougainvillea spectabilis willld, Mirabilis javanica, xylem vine-like shrub of the genus phyllanthus, with bent spines in the stems and dense villi. Alternate single leaf, oval full margin, thick fluffy, blunt tip. The flower is very tiny, yellowish green, three flowers gather in three red bracts, the peripheral red bracts are large and beautiful, have bright red, orange yellow, purple red, milky white and the like, are mistakenly considered as petals, and are called leafy flowers because the shape of the petals is similar to leaves. The flowering period may be from 11 months up to 6 months of the second year. In winter and spring, the bracts of the very beautiful flowers are displayed to give people a feeling of running and intense heat, so the very beautiful flowers are named as the celebrating spring red.
After 6 months, bougainvillea spectabilis is not able to bloom again because its flowering phase is over, but it is required to have as long a flowering phase as possible as an ornamental plant, and therefore, a cultivation method capable of making bougainvillea spectabilis bloom again after its flowering phase is over is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cultivation method for enabling bougainvillea spectabilis to bloom again after the flowering phase, so that the flowering phase of the bougainvillea spectabilis can be effectively prolonged.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
a cultivation method for enabling bougainvillea spectabilis to bloom for the second time after a flowering phase comprises the following steps:
(1) after 6 months of flowering of bougainvillea spectabilis, digging soil along the outer side of the water dripping line of the canopy and cutting off roots;
(2) then spraying a plant growth regulator to ensure that the bloomed flowers are all withered, trimming and pinching branches at the top ends of the bloomed flowers, removing buds which do not bloom at the top ends, and promoting flower bud differentiation;
(3) controlling water while performing top pruning, wherein the water control time is 2-3 weeks, and stopping fertilizing to ensure that the surface of the current-year branches is wrinkled and the branches and leaves wither due to water shortage;
(4) spraying a plant growth regulator with the concentration of 100-350 ppm to bougainvillea spectabilis every 10-15 days after the treatment of the step (3) for 10-12 days, after new flower buds are formed initially, fertilizing and watering, and applying an auxiliary regulator with the concentration of 10-50 mg/L every 3-5 days until the flower buds bloom.
Further, the plant growth regulator in the step (2) is naphthylacetic acid, 2, 4-dichlorophenoxyacetic acid or indolebutyric acid.
Further, the plant growth regulator in the step (4) is paclobutrazol, indoleacetic acid, ethephon or chlormequat chloride.
Further, the auxiliary regulator in the step (4) is fosetyl-aluminum and boric acid in a weight ratio of 1-2: 0.5-1.
Further, the weight ratio of fosetyl-aluminum to boric acid was 2: 0.5.
Further, the cultivation process also comprises heat preservation treatment, the temperature is 20-25 ℃, and the illumination time is 4-6 hours per day.
Further, the fertilization process is as follows: applying organic fertilizer to the cut root, watering to 1/2 of the depth of the cut root ditch, backfilling soil into the ditch after water permeates into soil, accelerating the formation and differentiation of callus, and promoting the growth of new roots and branches.
Further, after the flower buds bloom, spraying rice fermentation liquor every 3-7 days to enhance the enzyme activity in the flowers, maintain the color of the flowers and prolong the blooming time of the flowers.
The invention has the beneficial effects that:
1. according to the method, the bougainvillea spectabilis is root-breaking treatment is firstly carried out on the bougainvillea spectabilis root, redundant old roots and broken roots are removed, meanwhile, the bougainvillea spectabilis root can be effectively reduced to absorb nutrient components after the root breaking, the withering of flowers and the withering of branches and leaves of the bougainvillea spectabilis accelerated in a normal flowering phase, and the formation of flower buds which bloom for the subsequent second time is facilitated.
2. The withering of flowers which are opened in a normal flowering period is accelerated by spraying a plant growth agent, and then the treatment is matched with the treatments of root breaking, water control and the like, so that the withering of the flowers and the withering of boughs and leaves of boughs are further accelerated, and the differentiation of flower buds for secondary flowering is accelerated.
3. The auxiliary regulator formed by the fosetyl-aluminum and the boric acid is added in the new flower bud forming process, the fosetyl-aluminum has the sterilization effect firstly, the fosetyl-aluminum can also induce flower bud differentiation secondly, the boric acid also has the effect of promoting the flower bud differentiation of plants, the fosetyl-aluminum and the boric acid are matched, the formation of the flower bud of secondary flowering can be effectively accelerated, the quality of the flower bud is improved, the bougainvillea spectabilis can bloom for the second time after the flowering phase is finished, and the flowering phase is effectively prolonged.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1
A cultivation method for enabling the flowering period of the second time of the bougainvillea glabra to be later comprises the following steps:
(1) in the bougainvillea spectabilis planting pot, after the bougainvillea spectabilis reaches the florescence of 6 months, earth is dug along the outer side of the dripping line of the crown layer of the bougainvillea spectabilis to cut off roots, redundant old roots and broken roots are removed, and the broken root part is cut by scissors or a blade to enable the section of the broken root part to be flat;
(2) spraying naphthylacetic acid with the concentration of 300ppm to bougainvillea spectabilis after root cutting to accelerate withering of blossomed flowers, then pruning and pinching tip of bougainvillea spectabilis to break the top advantages of the bougainvillea spectabilis, remove buds at the top and promote bud differentiation of side buds so as to be beneficial to subsequent secondary blossoming;
(3) controlling water during the treatment in the step (2), wherein the water control time is 2-3 weeks, and stopping fertilizing when roots are broken, so that the surface of the annual branch is wrinkled, and the branch and leaves are gradually withered due to water shortage; it should be noted that, while controlling water, it is also ensured that plants do not die due to water shortage;
(4) after 10-12 days of treatment in the step (3), spraying paclobutrazol with the concentration of 100-350 ppm to bougainvillea spectabilis every 10-15 days, transplanting new flower buds to a new planting pot after the new flower buds appear, then mixing soil and organic fertilizer, accelerating the formation and differentiation of callus, and promoting the growth of new roots and new branches;
(5) meanwhile, a composite solution with the concentration of 10-50 mg/L formed by 1-2: 0.5-1 by weight of fosetyl-aluminum and boric acid is sprayed to the bougainvillea spectabilis every 3-5 days to accelerate the differentiation of flower buds and improve the quality of the flower buds until the flower buds bloom;
(6) after the flower buds bloom, the rice fermentation liquor is sprayed every 3-7 days, so that the enzyme activity in the flowers is enhanced, the color of the flowers is kept, and the blooming time of the flowers is prolonged.
(7) Temperature management: when the flower buds are fertilized, watered and cultivated, the cultivation temperature needs to be kept at 20-25 ℃, and the illumination is carried out for 4-6 hours every day.
Example 2
A cultivation method for enabling the flowering period of the second time of the bougainvillea glabra to be later comprises the following steps:
(1) in the bougainvillea spectabilis planting pot, after the bougainvillea spectabilis reaches the florescence of 6 months, earth is dug along the outer side of the dripping line of the crown layer of the bougainvillea spectabilis to cut off roots, redundant old roots and broken roots are removed, and the broken root part is cut by scissors or a blade to enable the section of the broken root part to be flat;
(2) spraying naphthylacetic acid with the concentration of 300ppm to bougainvillea spectabilis after root cutting to accelerate withering of blossomed flowers, then pruning and pinching tip of bougainvillea spectabilis to break the top advantages of the bougainvillea spectabilis, remove buds at the top and promote bud differentiation of side buds so as to be beneficial to subsequent secondary blossoming;
(3) controlling water during the treatment in the step (2), wherein the water control time is 2-3 weeks, and stopping fertilizing when roots are broken, so that the surface of the annual branch is wrinkled, and the branch and leaves are gradually withered due to water shortage; it should be noted that, while controlling water, it is also ensured that plants do not die due to water shortage;
(4) after 10 days of treatment in the step (3), spraying paclobutrazol with the concentration of 350ppm to bougainvillea spectabilis every 10 days, transplanting new flower buds to a new planting pot after the new flower buds appear, and then mixing soil and organic fertilizer to accelerate the formation and differentiation of callus and promote the growth of new roots and new branches;
(5) meanwhile, a compound solution with the concentration of 50mg/L formed by fosetyl-aluminum and boric acid with the weight ratio of 2:0.5 is sprayed to the bougainvillea spectabilis every 5 days to accelerate the differentiation of flower buds and improve the quality of the flower buds until the flower buds bloom;
(6) after the flower buds bloom, the rice fermentation liquor is sprayed every 7 days, so that the enzyme activity in the flowers is enhanced, the color of the flowers is maintained, and the blooming time of the flowers is prolonged.
(7) Temperature management: when the cultivation is carried out by fertilizing and watering after the flower buds are formed, the cultivation temperature needs to be kept at 25 ℃, and the illumination is carried out for 4 hours every day.
Example 3
A cultivation method for enabling the flowering period of the second time of the bougainvillea glabra to be later comprises the following steps:
(1) in the bougainvillea spectabilis planting pot, after the bougainvillea spectabilis reaches the florescence of 6 months, earth is dug along the outer side of the dripping line of the crown layer of the bougainvillea spectabilis to cut off roots, redundant old roots and broken roots are removed, and the broken root part is cut by scissors or a blade to enable the section of the broken root part to be flat;
(2) spraying naphthylacetic acid with the concentration of 300ppm to bougainvillea spectabilis after root cutting to accelerate withering of blossomed flowers, then pruning and pinching tip of bougainvillea spectabilis to break the top advantages of the bougainvillea spectabilis, remove buds at the top and promote bud differentiation of side buds so as to be beneficial to subsequent secondary blossoming;
(3) controlling water during the treatment in the step (2), wherein the water control time is 2-3 weeks, and stopping fertilizing when roots are broken, so that the surface of the annual branch is wrinkled, and the branch and leaves are gradually withered due to water shortage; it should be noted that, while controlling water, it is also ensured that plants do not die due to water shortage;
(4) spraying paclobutrazol with the concentration of 300ppm to bougainvillea spectabilis every 15 days after the treatment of the step (3) for 10 days, transplanting new flower buds into a new planting pot after the new flower buds appear, and then mixing soil and organic fertilizer to accelerate the formation and differentiation of callus and promote the growth of new roots and new branches;
(5) meanwhile, spraying a composite solution with the concentration of 40mg/L formed by fosetyl-aluminum and boric acid with the weight ratio of 1:1 to the bougainvillea spectabilis every 5 days to accelerate the differentiation of flower buds and improve the quality of the flower buds until the flower buds bloom;
(6) after the flower buds bloom, the rice fermentation liquor is sprayed every 7 days, so that the enzyme activity in the flowers is enhanced, the color of the flowers is maintained, and the blooming time of the flowers is prolonged.
(7) Temperature management: when the cultivation is carried out by fertilizing and watering after the flower buds are formed, the cultivation temperature needs to be kept at 25 ℃, and the illumination is carried out for 6 hours every day.
Comparative example 1
The steps (1) and (2) were removed, and the remaining process was the same as in example 1.
Comparative example 2
Steps (3) and (5) were removed, and the remaining procedures were the same as in example 1.
Comparative example 3
Step (6) was removed, and the rest of the procedure was the same as in example 1.
300 growing bougainvillea spectabilis 2 years old are selected, are randomly divided into 6 groups, 50 plants in each group are respectively treated by the methods of examples 1-3 and comparative examples 1-3, and then the secondary flowering effect of the bougainvillea spectabilis is observed, and the results are shown in table 1.
TABLE 1 bougainvillea spectabilis Secondary flowering Effect
| Second flowering Rate (%) | Flowering phase (d) | Flower shaped | |
| Example 1 | 100 | 92 | Dense and gorgeous |
| Example 2 | 100 | 90 | Dense and gorgeous |
| Example 3 | 100 | 95 | Dense and gorgeous |
| Comparative example 1 | 78 | 80 | Dense and gorgeous |
| Comparative example 2 | 34 | 78 | Gorgeous and beautiful |
| Comparative example 3 | 100 | 82 | Dense and gorgeous |
According to the data in the table 1, the method can effectively promote the secondary flowering of the bougainvillea spectabilis and prolong the flowering phase of the bougainvillea spectabilis.
Claims (6)
1. A cultivation method for enabling bougainvillea spectabilis to bloom for the second time after a flowering phase is characterized by comprising the following steps:
(1) after 6 months of flowering phase, digging soil along the outer side of the water dripping line of the canopy and cutting off roots;
(2) then spraying a plant growth regulator to ensure that the bloomed flowers are all withered, trimming and pinching branches at the top ends of the bloomed flowers, removing buds which do not bloom at the top ends, and promoting flower bud differentiation;
(3) controlling water while performing top pruning, wherein the water control time is 2-3 weeks, and stopping fertilizing to ensure that the surface of the current-year branches is wrinkled and the branches and leaves wither due to water shortage;
(4) spraying a plant growth regulator with the concentration of 100-350 ppm to bougainvillea spectabilis every 10-15 days after the treatment in the step (3) for 10-12 days, after new flower buds are formed, starting fertilizing and watering, and applying an auxiliary regulator with the concentration of 10-50 mg/L every 3-5 days until the flower buds bloom.
2. A cultivation method of bougainvillea spectabilis for the secondary flowering after the flowering phase as claimed in claim 1, wherein the plant growth regulator in the step (2) is naphthylacetic acid, 2, 4-dichlorophenoxyacetic acid or indolebutyric acid.
3. A cultivation method for making bougainvillea spectabilis flower for the second time after flowering according to claim 1, wherein the plant growth regulator in step (4) is paclobutrazol, indolylacetic acid, ethephon or chlormequat chloride.
4. A cultivation method for enabling bougainvillea spectabilis to bloom twice after a flowering phase according to claim 1, wherein the auxiliary regulator in the step (4) is fosetyl-aluminum and boric acid in a weight ratio of 1-2: 0.5-1.
5. A cultivation method as claimed in claim 4, wherein the weight ratio of fosetyl-aluminum and boric acid is 2: 0.5.
6. A cultivation method for making bougainvillea spectabilis flowering twice after a flowering period as claimed in claim 1, further comprising a heat-preserving and moisture-preserving treatment in the cultivation process, wherein the temperature is 20-25 ℃, and the illumination time per day is 4-6 h.
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