CN108477163B - Plant growth regulator for adjusting inflorescence type of phalaenopsis and application thereof - Google Patents

Plant growth regulator for adjusting inflorescence type of phalaenopsis and application thereof Download PDF

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CN108477163B
CN108477163B CN201810297347.5A CN201810297347A CN108477163B CN 108477163 B CN108477163 B CN 108477163B CN 201810297347 A CN201810297347 A CN 201810297347A CN 108477163 B CN108477163 B CN 108477163B
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phalaenopsis
agent
plant growth
growth regulator
spraying
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CN108477163A (en
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许申平
张腾飞
梁芳
张燕
王默霏
袁秀云
蒋素华
马杰
崔波
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Zhengzhou Normal University
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N37/00Biocides, 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
    • A01N37/12Biocides, 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 containing the group, wherein Cn means a carbon skeleton not containing a ring; Thio analogues thereof
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00Botany in general
    • A01G7/06Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N37/00Biocides, 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
    • A01N37/10Aromatic or araliphatic carboxylic acids, or thio analogues thereof; Derivatives thereof
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N43/00Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/90Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N47/00Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/36Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof

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Abstract

The invention belongs to the technical field of crop cultivation, and particularly relates to a plant growth regulator and application thereof in regulating the inflorescence type of phalaenopsis. The induction of phalaenopsis with a raceme type is changed into phalaenopsis with a renatured inflorescence type by applying a plant growth regulator during the process of inducing flower buds of phalaenopsis. The plant growth regulator and the method can be used for different stages of low-temperature induction of flower buds of the phalaenopsis, the application range is wide, the adaptability is good, and experiments show that after the method and the plant growth regulator are adopted, 2-3 dormant buds below the flower of the rachis of the phalaenopsis completely germinate to be the rachis, and meanwhile, the plant growth regulator and the method have positive effects on improving the flowering quality of the phalaenopsis. The method is suitable for industrial cultivation of the phalaenopsis, the production cost is low, the obtained phalaenopsis has high quality and good consistency, and the method has the advantages of low investment and high yield and shows good popularization and application values.

Description

Plant growth regulator for adjusting inflorescence type of phalaenopsis and application thereof
Technical Field
The invention belongs to the technical field of crop cultivation, and particularly relates to a plant growth regulator for regulating the inflorescence type of butterfly orchid and application thereof.
Background
Butterfly orchid (Phalaenopsis aphrodite) Belongs to the genus Phalaenopsis of the family Orchidaceae, is a CAM orchid which has a heat-generating zone for many years and is often used as a pot culture or a cut flower, and is one of the most popular four orchids in the international flower market. The flowering time and the flowering quality of the phalaenopsis are important factors influencing the commodity value of the phalaenopsis, and like most plants, the phalaenopsis needs to grow nutritionally for a period of time to receive environmental stimulation and pull out stems to flower. The flower bud differentiation of the phalaenopsis is mainly regulated by temperature, mature orchid plants can generate flower buds only after being induced at a certain low temperature (18-25 ℃), and the flower bud differentiation rate and the flower formation quality can be obviously influenced by physical and chemical methods.
Normally, inflorescences of phalaenopsis include two types, the raceme and the panicle. Inflorescence peduncles of the large-flower type phalaenopsis do not branch and are represented as a raceme; the inflorescence peduncle of the floret-type phalaenopsis has a plurality of branches, and each branch forms a raceme which is expressed as a compound raceme. For large-flower type phalaenopsis, a single inflorescence type not only affects the flower cutting effect, but also is not beneficial to single-pot arrangement and appreciation (large-flower type phalaenopsis are sold in a combined mode), and is the main reason for limiting the appreciation mode and the number of bloomes.
The inflorescence type of a plant depends mainly on its inflorescence branching habit and the relative position of the flowers in life. Although different higher plants have evolved different ways of inducing flowering, all of the ways of promoting flowering are converged at the shoot apical meristem to promote flowering through the shoot apical meristem. In the reproductive growth stage, the seedling end meristem generates transition from a vegetative type to a reproductive type, is converted into an inflorescence meristem, then differentiates a flower meristem from the side wing of the inflorescence meristem, and further differentiates a floral organ primordium from the flower meristem. The flanks of the major inflorescence meristem as a raceme are infinitely differentiated into floral meristems; the reassortant inflorescence is the main inflorescence meristem, after a series of branch meristems are generated, the flanks are infinitely differentiated into the flower meristems. The inflorescence of the large-flower type phalaenopsis is a typical total inflorescence, after a seedling end meristem is converted into an inflorescence meristem, the inflorescence meristem infinitely differentiates into a flower meristem, and if a compound total inflorescence needs to be induced, the inflorescence meristem must be converted into a branch meristem and a flower meristem, so that a compound total inflorescence is generated.
The artificial plant growth regulator is used as an exogenous non-nutritive chemical substance, and can promote or inhibit certain links of the life process of a plant at a very low concentration after being conducted to an action site in the plant body, so that the plant growth regulator is developed to meet the needs of human beings. Generally, each plant growth regulator has its specific use, and the application requirements are quite strict, and the specific efficacy on the target plant can be produced only under specific application conditions (including external factors) and specific proportioning conditions.
Therefore, aiming at the characteristics of the large-flower type phalaenopsis amabilis raceme, a specific plant growth regulator composition is applied in the process of inducing flower buds of the phalaenopsis amabilis at low temperature, and a novel cultivation method which is suitable for industrial large-scale production and can economically and effectively improve the phalaenopsis amabilis inflorescence type is developed by combining the physiological development period of the characteristics.
Disclosure of Invention
The invention aims to provide a plant growth regulator for regulating the inflorescence type of phalaenopsis and application thereof. The plant growth regulator and the use method thereof are economical and effective, can realize the industrial cultivation of the phalaenopsis, have simple production process, can effectively improve the inflorescence type of the phalaenopsis, and improve the ornamental quality of the phalaenopsis.
In order to achieve the purpose, the invention adopts the following technical scheme:
a plant growth regulator for regulating the inflorescence type of phalaenopsis comprises an agent A and an agent B, wherein the agent A is an aqueous agent and contains DA-6 with the concentration of 5.0-25.0 mg/mL; the B agent is an organic solvent which can be mutually dissolved with water, preferably absolute ethyl alcohol, and contains 2.0-10.0 mg/mL of 6-BA, 0.5-8.0 mg/mL of NAA and 0.2-5.0 mg/mL of KT-30.
The plant growth regulator is applied to the adjustment of the inflorescence type of the butterfly orchid, and is sprayed in the process of inducing flower buds of the butterfly orchid at low temperature, and can be sprayed in the early stage of low temperature induction, the middle stage of low temperature and the later stage of low temperature induction, and also can be sprayed in one or two periods of low temperature induction independently, wherein the specific time of low temperature induction is the early stage: 1-20 days, 20-40 days in the middle stage and 40-80 days in the later stage; when spraying, 8-10 mL of the agent A and 8-10 mL of the agent B are added into each L of clear water, and the clear water and the agent A are uniformly mixed to be used as spraying liquid; the dosage of the spraying liquid is 180-200 butterfly orchid plants sprayed by each L of the spraying liquid.
The method for adjusting the inflorescence type of the phalaenopsis by using the plant growth regulator comprises the following steps:
(1) after culturing the phalaenopsis, carrying out low-temperature induction on flower bud formation; the phalaenopsis is of a type with a raceme, and specifically comprises the following steps: "Neishan girl", "red coral", "Dafugui" or "niu magic;
(2) spraying a plant growth regulator at the early stage, the middle stage and the later stage of the low-temperature induction of the flower buds, wherein the ratio of the agent A to the agent B is 0.8-1: 1; adding 8-10 mL of the agent A and 8-10 mL of the agent B into each L of clear water, and uniformly mixing to obtain a spraying liquid; the dosage of the spraying liquid is that 180-200 phalaenopsis plants are sprayed per L of the spraying liquid; spraying for not less than 3 times, stopping spraying after the first flower on the inflorescence buds, and then carrying out normal management; the specific spraying time is as follows:
1, time: inducing flower bud at low temperature for 1-5 days;
and 2, time: inducing the floral buds at low temperature for 28-35 days, when the rachis just sprouts leaf sheaths;
and (3) time: inducing flower bud at low temperature for 50-60 days, wherein the length of rachis is 6-12 cm.
When the plant growth regulator is sprayed, standard spraying equipment can be used, preferably a pressure pump which is commonly used for applying bactericides or insecticides every day, so that the plant growth regulator aqueous solution is conveniently atomized, and the upper surface and the lower surface of the leaves are contacted with the spraying solution; in order to better absorb the plant growth regulator solution, the spraying treatment is preferably performed on a clear day, preferably 16:00 to 18:00 in the afternoon.
The plant growth regulator can be used for different stages of low-temperature induction of flower buds of phalaenopsis, namely the plant growth regulator can be used before the first flower of phalaenopsis buds, the application range is wide, and the plant growth regulator has good adaptability.
Experiments show that after the method and the plant growth regulator provided by the invention are adopted, 2-3 dormant buds below the inflorescence shaft flowers of the phalaenopsis are all germinated into the inflorescence shaft, the inflorescence type of the phalaenopsis can be better changed, meanwhile, the method has a positive effect on improving the flowering quality of the phalaenopsis, and the germination and growth of the inflorescence shaft of the phalaenopsis can be accelerated. Generally speaking, the method is suitable for industrial cultivation of the phalaenopsis, the production cost is low, the consistency is good, and the obtained phalaenopsis product has high quality and has the advantages of low investment and high yield.
Drawings
FIG. 1 is a diagram of Phalaenopsis "Physalis alkekengi" of the type having a complex inflorescence after low temperature induction;
FIG. 2 is a depiction of Phalaenopsis "Red coral" of the type having a complex inflorescence after low temperature induction;
FIG. 3 is a 'big riches and honour' of phalaenopsis with a total inflorescence after low-temperature induction;
FIG. 4 is a "big riches and honour" of Phalaenopsis with a branching complex inflorescence after low temperature induction;
FIG. 5 is a "big riches and honour" butterfly orchid with two branch complex inflorescences after low temperature induction;
FIG. 6 is a "big riches and honour" of Phalaenopsis with three branching complex inflorescences after low temperature induction.
Detailed Description
The following tests were all conducted in 2017 at the orchid engineering research center of Zheng Zhou academy of education in Zheng Zhou of the year.
Example 1
A plant growth regulator for regulating phalaenopsis inflorescence type, comprising an agent a and an agent B: the agent A is a water agent, wherein the DA-6 with the concentration of 15.0 mg/mL is contained; the agent B is absolute ethyl alcohol, and contains 6-BA with the concentration of 6.0 mg/mL, NAA with the concentration of 2.0mg/mL and KT-30 with the concentration of 2.0 mg/mL.
The phalaenopsis amabilis 'physalis alkekengi' is selected as a test object, and the plant growth regulator is applied in the process of low-temperature flower bud induction.
The plant growth regulator is sprayed for 3 times in the implementation process, and the specific implementation time and the method are as follows:
performing 1 st time on 16:30 days 2 of inducing flower buds of physalis alkekengi of phalaenopsis amabilis at low temperature, sequentially adding 50ml of agent A and 50ml of agent 50mlB into 5L of water to prepare spraying liquid, fully and uniformly mixing, and spraying 1000 plants by using a pressure pump;
2, inducing the flower buds of the Phalaenopsis amabilis 'physalis endosseus' at low temperature for 16:30 days, sequentially adding 50ml of the agent A and 50ml of the agent B into 5.5L of water, fully mixing uniformly, spraying 1000 plants by using a pressure pump, wherein the average length of the inflorescence axis is about 1cm when a leaf sheath just sprouts;
and 3, sequentially adding 40ml of agent A and 40ml of agent B into 5L of water for 16:30 days of low-temperature induction of flower buds of physalis alkekengi of phalaenopsis amabilis for 50 days, fully and uniformly mixing, spraying 1000 plants by using a pressure pump, wherein the average length of an inflorescence axis is about 10cm, and normally managing after spraying each time.
Environmental conditions for low-temperature flower bud induction: the illumination intensity maintains natural illumination, strong illumination is required in the flowering promoting period, and the light intensity is controlled within 25000 Lux; the humidity is 70-80%; the day and night temperature is 24/18 ℃; sterilizing with carbendazim once a month, preventing and treating insect pest according to specific conditions, stopping low temperature induction when the length of the flower arrow reaches 10cm, and recovering normal management of environmental conditions.
Normal management environmental conditions: the illumination intensity maintains natural illumination, the top layer is controlled by a sunshade net, and the maximum light intensity does not exceed 15000 Lux; the humidity is 70-80%; the day and night temperature is 28/24 ℃; the carbendazim is used for sterilizing once a month, and insect pests are controlled according to specific conditions.
The method described in example 1 can change the raceme to a complex raceme (as shown in fig. 1) during the process of inducing flower buds at low temperature of Phalaenopsis amabilis (Physalis alkekengi) of Phalaenopsis, wherein the induced complex raceme accounts for 100%, the complex raceme with 2 branches accounts for 81%, and the complex raceme with 3 branches accounts for 19%; the germination time of the phalaenopsis amabilis in the example 1 is two days earlier than that of the comparison example 1, and the flowering quality is obviously better than that of the comparison example 1.
Example 2
A plant growth regulator for regulating phalaenopsis inflorescence type, comprising an agent a and an agent B: 10mL of the agent A is a water agent, wherein the DA-6 with the concentration of 20.0mg/mL is contained; the B agent 10mL is absolute ethyl alcohol, which contains 3.0 mg/mL of 6-BA, 1.0mg/mL of NAA and 1.0mg/mL of KT-30.
The phalaenopsis 'red coral' is selected as a test object, and the plant growth regulator is applied in the process of low-temperature flower bud induction.
The spraying is carried out for 3 times in total in the implementation process, and the normal management can be carried out after each spraying, and the specific implementation time and the method are as follows:
the 1 st time is carried out 16:30 days 2 of inducing the flower buds of the phalaenopsis 'Hongshou' at low temperature, 50ml of the agent A and 50ml of the agent B are sequentially added into 5L of water, fully and uniformly mixed, and 1000 plants are sprayed by a pressure pump;
2, sequentially adding 50ml of agent A and 50ml of agent B into 5.5L of water for sufficiently and uniformly mixing, and spraying 1000 plants by using a pressure pump, wherein the average length of the inflorescence axis just sprouting leaf sheath is about 1cm at the moment, wherein the 16:30 days are 16: 33 days after the initiation of the low-temperature induction of the flower buds of the phalaenopsis;
the 3 rd time is carried out 16:30 of inducing the flower buds of the phalaenopsis 'Hongshui' at low temperature for 50 days, 40ml of the agent A and 40ml of the agent B are sequentially added into 5L of water, fully and uniformly mixed, 1000 plants are sprayed by a pressure pump, and the average length of the inflorescence axis is about 10 cm.
Environmental conditions for low-temperature flower bud induction: the illumination intensity maintains natural illumination, strong illumination is required in the catalysis period, and the light intensity is controlled within 25000 Lux; the humidity is 70-80%; the day and night temperature is 24/18 ℃; the carbendazim is sterilized once a month, insect pests are controlled according to specific conditions, low-temperature induction can be stopped when the flower arrow grows to 10cm, and the environmental conditions are recovered to normal management.
Normal daily management environmental control: the illumination intensity maintains natural illumination, the top layer is controlled by a sunshade net, and the maximum light intensity does not exceed 15000 Lux; the humidity is 70-80%; the day and night temperature is 28/24 ℃; the carbendazim is used for sterilizing once a month, and insect pests are controlled according to specific conditions.
The method described in example 2 can change the raceme to a complex raceme (as shown in fig. 2) during the low-temperature induction of flower buds by phalaenopsis "red coral", the induced complex raceme accounts for 100%, the complex raceme with 2 branches accounts for 84%, and the complex raceme with 3 branches accounts for 16%; in the embodiment 2, the germination time of the phalaenopsis is two days earlier than that of the comparison example 1, and the flowering quality is obviously better than that of the comparison example 1.
In general, after the method provided by the embodiment 1-2 is used, the inductivity of the composite inflorescence of the phalaenopsis reaches 100%, and the germination time of the phalaenopsis flower buds can be advanced, so that the method provided by the invention has a good application value.
Example 3
The method of this example differs from example 1 in that: the concentration of DA-6 in the agent A is 5.0mg/mL, the concentration of 6-BA in the agent B is 2.0mg/mL, the concentration of NAA is 0.5mg/mL, and the concentration of KT-30 is 0.2 mg/mL.
Example 4
The method of this example differs from example 1 in that: the concentration of NAA in the B agent is 4.25mg/mL, and the concentration of KT-30 is 2.6 mg/mL.
Example 5
The method of this example differs from example 1 in that: the concentration of DA-6 in the agent A is 25.0mg/mL, the concentration of 6-BA in the agent B is 10.0 mg/mL, the concentration of NAA is 8.0mg/mL, and the concentration of KT-30 is 5.0 mg/mL.
In the embodiments 3-5, after the method provided by the invention is adopted, the inductivity of the composite inflorescence of the phalaenopsis can reach 100% in general, and the germination time of the phalaenopsis can be advanced, so that the method has good application value.
Comparative example 1
Spraying clear water without the plant growth regulator in the low-temperature induction process of the phalaenopsis, wherein the specific implementation time and method, the induction conditions and the normal illumination management conditions are the same as those in example 1, and the phalaenopsis is selected as a test object.
And (3) inducing results: the induced results in comparative example 1 are all of the raceme (as shown in fig. 3), the germination time of the phalaenopsis in comparative example 1 is two days later than that in example 1, and the flowering quality is obviously lower than that in example 1.
Comparative example 2
The sprayed plant growth regulator only contains A but not B, and the phalaenopsis amabilis is selected as a test object; the method specifically comprises the following steps: the agent A is a water agent and contains DA-6 with the concentration of 15.0 mg/mL.
The spraying is carried out 3 times in total in the implementation process, and the specific implementation time, method, induction conditions and normal illumination management conditions are the same as those in example 1.
And (3) inducing results: the method described in comparative example 2 can change part of the raceme into a compound raceme in the process of inducing buds of phalaenopsis at a low temperature, wherein the induced compound raceme accounts for 40 percent, and the total inflorescence accounts for 60 percent. Wherein the total rosette with 1 branch is 24% (as shown in FIG. 4), the total rosette with 2 branches is 76% (as shown in FIG. 5), and the total rosette with 3 branches is not present (as shown in FIG. 6); the germination time and flowering quality of phalaenopsis in comparative example 2 were not significantly different from those of comparative example 1.
Comparative example 3
The sprayed plant growth regulator only contains B but not A, and the phalaenopsis amabilis is selected as a test object; the method specifically comprises the following steps: the agent B is absolute ethyl alcohol, and contains 6-BA with the concentration of 6.0 mg/mL, NAA with the concentration of 2.0mg/mL and KT-30 with the concentration of 2.0 mg/mL.
The spraying is carried out 3 times in total in the implementation process, and the specific implementation time, method, induction conditions and normal illumination management conditions are the same as those in example 1.
And (3) inducing results: by using the method described in comparative example 3, part of the raceme can be changed into a compound raceme in the process of inducing buds of phalaenopsis at a low temperature, the induced compound raceme accounts for 26 percent, and the total inflorescence accounts for 74 percent. In the multiple racemes, 11% of the multiple racemes with 2 branches (as shown in FIG. 5) and 89% of the multiple racemes with 1 branch (as shown in FIG. 4); the germination time and flowering quality of phalaenopsis in comparative example 3 were not significantly different from those in comparative example 1.
Comparative example 4
The sprayed plant growth regulator contains an agent A and an agent B, but the agent B is lack of a plant growth regulator KT-30, and the phalaenopsis amabilis is selected as a test object; the method specifically comprises the following steps: the agent A contains DA-6 with the concentration of 15.0 mg/mL; the preparation B contains 6-BA at a concentration of 6.0 mg/mL and NAA at a concentration of 2.0 mg/mL.
The spraying is carried out 3 times in total in the implementation process, and the specific implementation time, method, induction conditions and normal illumination management conditions are the same as those in example 1.
And (3) inducing results: the method described in comparative example 4 can change the raceme to a complex raceme during the "highly expensive" low temperature induction of flower buds in phalaenopsis, the induced complex raceme accounting for 100%, and the complex raceme with 1 branch accounting for 25% (as shown in fig. 4); the percentage of the total rosette with 2 branches was 68% (as shown in fig. 5), but 55% of the total rosettes with 2 branches had aborted buds on one branch and failed to form bud patency; the total of flowers with 3 branches is 7% (as shown in fig. 6), but all have buds on one branch inflorescence which cannot normally open; the time for the phalaenopsis flower bud to sprout in comparative example 4 was two days earlier than comparative example 1.
The above examples are illustrative of the present invention, and the present invention is not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims (4)

1. The application of the plant growth regulator for regulating the inflorescence type of the phalaenopsis is characterized in that the plant growth regulator comprises an agent A and an agent B, wherein the agent A is an aqueous agent and contains DA-6 with the concentration of 5.0-25.0 mg/mL; the agent B is an organic solvent which can be mutually dissolved with water, and contains 6-BA with the concentration of 2.0-10.0 mg/mL, NAA with the concentration of 0.5-8.0 mg/mL and KT-30 with the concentration of 0.2-5.0 mg/mL, wherein the volume ratio of the agent A to the agent B is 0.8-1: 1, the organic solvent is absolute ethyl alcohol;
during application, the plant growth regulator is sprayed at the early stage of low temperature, the middle stage of low temperature and the later stage of low temperature for inducing flower buds of phalaenopsis amabilis, or sprayed at one or two stages of low temperature induction, and the early stage of low temperature induction is as follows: 1-20 days, the middle stage is: 20-40 days, the later period is: 40-80 days;
when spraying, 8-10 mL of the agent A and 8-10 mL of the agent B are added into each L of clear water, and the clear water and the agent A are uniformly mixed to be used as spraying liquid; the dosage of the spraying liquid is that 180-200 phalaenopsis plants are sprayed per L of the spraying liquid;
the phalaenopsis amabilis is a variety of 'Neishan girl', 'Hongshan', 'Dafugui' or 'niuwang'.
2. A method for adjusting the inflorescence type of phalaenopsis by using a plant growth regulator is characterized in that the plant growth regulator comprises an agent A and an agent B, wherein the agent A is an aqueous agent and contains DA-6 with the concentration of 5.0-25.0 mg/mL; the agent B is an organic solvent which can be mutually dissolved with water, and contains 6-BA with the concentration of 2.0-10.0 mg/mL, NAA with the concentration of 0.5-8.0 mg/mL and KT-30 with the concentration of 0.2-5.0 mg/mL, wherein the volume ratio of the agent A to the agent B is 0.8-1: 1, the organic solvent is absolute ethyl alcohol;
the method specifically comprises the following steps:
(1) after culturing the phalaenopsis, carrying out low-temperature induction on flower bud formation;
(2) spraying a plant growth regulator at the early stage, the middle stage and the later stage of the low-temperature induction of the flower buds, wherein the ratio of the agent A to the agent B is 0.8-1: 1; adding 8-10 mL of the agent A and 8-10 mL of the agent B into each L of clear water, and uniformly mixing to obtain a spraying liquid; the dosage of the spraying liquid is that 180-200 phalaenopsis plants are sprayed per L of the spraying liquid; the spraying frequency is not less than 3 times, the spraying is stopped after the first flower on the inflorescence buds, and then the management is carried out normally.
3. The method of claim 2, wherein in step (1), the phalaenopsis is a "physalis alkekengi", "rhododendron corals", "sargentgloryvine" or "niu wang" variety.
4. The method as claimed in claim 2, wherein in the step (2), the spraying times are 3, and the specific spraying time is as follows:
1, time: inducing flower bud at low temperature for 1-5 days;
and 2, time: inducing the floral buds at low temperature for 28-35 days, when the rachis just sprouts leaf sheaths;
and (3) time: inducing flower bud at low temperature for 50-60 days, wherein the length of rachis is 6-12 cm.
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