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A method for controlling and controlling the flowering of Stevia rebaudiana seedlings by LED lighting

A technology of LED lights and stevia, applied in horticultural methods, botanical equipment and methods, leaf crop cultivation, etc., can solve the problems of poor applicability, waste of production costs, time delay, etc., achieve convenient water and electricity, and increase bioluminescence efficiency , the effect of inhibiting flower bud differentiation

Active Publication Date: 2022-03-04
GANSU RES INST OF AGRI ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stevia is a short-day plant, and short-day conditions can induce the formation of flower primordia, and the seedlings after cuttings will bud and bloom soon after survival, which will affect their further cutting propagation.
[0004] In order to solve the problem of Stevia rebaudiana flowering in the seedling stage of asexual reproduction, the prior art usually uses the part of Stevia underground that has not induced flower primordia to be cultivated, and the regrown branches without flower bud differentiation are used for cuttings, which not only delays time, but also A lot of seedling materials and production costs are wasted, which is not conducive to the rapid propagation of Stevia rebaudiana cutting seedlings
[0005] In addition, there are also studies to reduce the flowering of Stevia rebaudiana by controlling the light time longer than the critical day length. High performance, waste of production cost

Method used

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  • A method for controlling and controlling the flowering of Stevia rebaudiana seedlings by LED lighting
  • A method for controlling and controlling the flowering of Stevia rebaudiana seedlings by LED lighting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In September 2018 (the dark period of this season is roughly between 19:00-08:00), in the solar greenhouse of the Gansu Agricultural Engineering Technology Research Institute, "LED red light (660nm) control treatment at different periods of the dark period of stevia cutting seedlings was carried out. test". Red LED lights are uniformly set in the shed, and the LED light intensity is 170μmol / (m 2 .s), the output power is 30W.

[0035] The coverage diameter of the LED light is 4m, and the height when it shines on the seedlings to achieve the best brightness is 1.5m; the installation distance of the LED lights is 3.5-4m, and the installation height of the LED lights from the seedlings is about 1.5m, ensuring that the LED lights cover all the seedbeds , leaving no dead ends; all LED lights use a time-controlled switch for intelligent control.

[0036] Sources of cuttings include:

[0037] 1. The stem section of the seedling grows to 7-8 pairs of leaves;

[0038] 2. Youn...

Embodiment 2

[0046] In February 2019, on the basis of Example 1, the "Stevia rebaudiana cuttage seedling dark stage middle stage LED red light (660nm) different light time regulation and treatment experiment" was carried out in the solar greenhouse of Gansu Agricultural Engineering Technology Research Institute, the test greenhouse Cover / remove the quilt curtain regularly every day, and the dark period is greater than 12h.

[0047] Sources of cuttings include:

[0048] 1. The stem section of the seedling grows to 7-8 pairs of leaves;

[0049] 2. Young shoots germinated from old roots grow to 7-8 pairs of leaves;

[0050]3. The newly germinated side branches on the plant to be multiplied grow 7-8 pairs of leaves;

[0051] Cut the stem section with 5-6 pairs of leaves from the above-mentioned seedling stem section, the young shoot section germinated from the old root, and the top of the newly germinated side branch, and carry out cutting seedling cultivation in the test greenhouse, normall...

Embodiment 3

[0057] In September 2019, on the basis of Example 2, the test plan was improved, and the "Experiment on the influence of different red and blue light ratios on the budding and flowering of stevia cuttings in the mid-dark period" was carried out in the solar greenhouse of Gansu Agricultural Engineering Technology Research Institute. .

[0058] Replace the red LED lamp with a combination of red and blue LED lamps. The test set the combination of 660nm red light (95%) and 460nm blue light (5%) (treatment 1), the combination of 660nm red light (85%) and 460nm blue light (15%) (Treatment two), combination of 660nm red light (75%) and 460nm blue light (25%) (treatment three), combination of 660nm red light (65%) and 460nm blue light (35%) (treatment four), 660nm red light (55%) %) combined with 460nm blue light (45%) (treatment five) for 5 treatments; the total light intensity of each group of LED lamps was 170 μmol / (m 2 .s), the output power is 35W.

[0059] After transplanting t...

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Abstract

The invention discloses a method for controlling and controlling the flowering of stevia seedlings by LED lights, comprising the following steps: (1) selection and installation of LED lights: selecting a combination of 660nm red light with a light quality of 75% and 460nm blue light with 25% LED lights, total light intensity 150‑180μmol / (m 2 .s), the output power is 30‑40W; LED lights are installed in the nursery facilities, so that the LED lights cover all the seedbeds in the nursery facilities; (2) LED lighting treatment: after stevia cuttings, turn on the LED lights in the middle of the dark period for light Treatment: The temperature is controlled at 15-30°C and the relative humidity is 75-85% during the whole process from cutting to seedling raising. Stevia rebaudiana cutting propagation using the method can reduce the waste of seedling raising materials caused by budding and flowering, save production costs, accelerate the stevia breeding work and the cutting seedling breeding speed in production, and increase the annual multiplication quantity.

Description

technical field [0001] The invention relates to the technical field of Stevia rebaudiana asexual propagation, and more specifically relates to a method for controlling and controlling the flowering of Stevia rebaudiana seedlings by LED lighting. Background technique [0002] Stevia, scientific name: Stevia rebaudiana (Bertoni) Hemsl, native to the subtropical region of South America, is a perennial herb of the genus Stevia in the family Asteraceae. Steviol glycoside extracted from stevia leaves is known as "natural saccharin" and the "third sugar source" in the world. It is a natural, high-sweet, low-calorie, new type of green health-care sweetener. An ideal substitute for beet sugar. Steviol glycosides have good anti-cancer activity, can reduce the blood sugar concentration of type 2 diabetes, control high blood pressure, and have great potential in the development of medical and health care products; currently they are widely used in food, beverage, pharmaceutical, daily ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G2/10A01G7/04A01G9/14A01G22/15
CPCA01G22/15A01G7/045A01G9/14A01G2/10Y02P60/14Y02A40/25
Inventor 谢忠清张亚萍赵玺张靖王致和刘强张肖凌马金慧钱昊旸张秀华何友萍
Owner GANSU RES INST OF AGRI ENG TECH
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