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A method of controlling the differentiation of chrysanthemum flower buds with LED light source

A LED light source and flower bud differentiation technology, which is applied in the field of plant cultivation, can solve the problems of rising ambient temperature, low plant light energy utilization rate, unfavorable plant growth and development, etc., and achieve the effect of reducing energy consumption and inhibiting flower bud differentiation

Active Publication Date: 2015-11-25
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for high-pressure sodium lamps, halogen lamps, incandescent lamps and other energy-intensive continuous-wavelength (300-1500nm or wider wavelength range) light sources (hereinafter referred to as ordinary light sources), plants have a low utilization rate of light energy, and because of their It belongs to the thermal light source, which is easy to cause the ambient temperature to rise, and cannot be close to the irradiation of plants, which is not conducive to the precise control of the growth and development of plants.

Method used

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  • A method of controlling the differentiation of chrysanthemum flower buds with LED light source
  • A method of controlling the differentiation of chrysanthemum flower buds with LED light source
  • A method of controlling the differentiation of chrysanthemum flower buds with LED light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0021] The distribution of the three LED lights on the irradiation unit is: the blue LED lights are evenly distributed on a circle with a diameter of 3.0cm; the red light A LED lights are evenly distributed on a circle with a diameter of 7.0cm; The LED lights of B are evenly distributed on a circle with a diameter of 11.0cm, and the centers of the circles where the three LED lights are located coincide;

[0022] Blue light: wavelength 450nm, photon flux density 0.78μmol m -2 ·s -1 ;

[0023] Red light A: wavelength 630nm, photon flux density 0.79μmol·m -2 ·s -1 ;

[0024] Red light B: wavelength 660nm, photon flux density 0.15μmol m -2 ·s -1 ;

[0025] figure 1 It is the distribution diagram of three kinds of LED lamps on the irradiation unit of the present invention, with figure 1 Shown irradiation unit, described irradiation unit is installed in the high place of 20cm above plant, 22:00-2:00 irradiates 4 hours every evening, stops irradiating 40 days before the chry...

Embodiment 1-2

[0027] The number of LED lights in the irradiation unit of Example 1-1 is doubled according to the ratio of blue light: red light A: red light B = 3:6:6, that is, there are 6 blue light LED lights, red light A and red light B There are 12 LED lamps each, and the remaining experimental methods are the same as in Example 1-1.

Embodiment 2-1

[0031] The distribution of the three LED lights on the irradiation unit is: the blue LED lights are evenly distributed on a circle with a diameter of 4.0cm; the red light A LED lights are evenly distributed on a circle with a diameter of 8.0cm; The LED lights of B are evenly distributed on a circle with a diameter of 12.0cm, and the centers of the circles where the three LED lights are located coincide;

[0032] Blue light: wavelength 440nm, photon flux density 0.78μmol m -2 ·s -1 ;

[0033] Red light A: wavelength 620nm, photon flux density 0.79μmol·m -2 ·s -1 ;

[0034] Red light B: wavelength 650nm, photon flux density 0.15μmol m -2 ·s -1 ;

[0035] figure 1 It is the distribution diagram of three kinds of LED lamps on the irradiation unit of the present invention, with figure 1 As shown in the irradiation unit, the irradiation unit is installed at a height of 50 cm above the plant, irradiates for 4 hours every night at 22:00-2:00, and stops irradiation 40 days bef...

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Abstract

The invention provides a method for controlling chrysanthemum flower bud differentiation by using a light-emitting diode (LED) light source. The method includes that before chrysanthemum flower bud differentiation, an LED irradiating unit is installed per square meter of cultivating area to irradiate chrysanthemum, the chrysanthemum is irradiated for a plurality of hours every night, and irradiation is stopped 40-45 days before the estimated chrysanthemum harvesting date. Each irradiating unit is composed of three LED lamps of blue light, red light A and red light B, and the ratio of blue light, red light A and red light B is 3:6:6. Three LEDs in each irradiating unit are distributed on the same plane evenly. One blue-light LED and two red-light LEDs with different wavelengths and light quantum flux density values are mixed according to certain ratio to form one irradiating unit, chrysanthemum growing points are irradiated, flower bud differentiation can be restrained effectively, the purposes of artificial regulation of blooming and enabling the chrysanthemum to come into market according to a target date are achieved, the method is remarkable in effect and better than methods using common light sources of incandescent lamps, and energy consumption can be greatly reduced.

Description

technical field [0001] The invention relates to the field of plant cultivation, in particular to a method for controlling the differentiation of chrysanthemum flower buds by using an LED light source. Background technique [0002] Chrysanthemum (especially autumn chrysanthemum) is a typical short-day plant, and its flower bud differentiation and flowering period are regulated by photoperiod. When the natural day length is less than the critical day length of chrysanthemum flower bud differentiation, the plant enters the flower bud differentiation period, and artificial supplementation is used in production. Light prolongs the daily light time to inhibit flower bud differentiation and achieve the purpose of delaying flowering. At present, ordinary heat light sources such as high-pressure sodium lamps, halogen lamps, and incandescent lamps are generally used for supplementary light, which consumes a lot of energy. [0003] The absorption of light by plants is not full-band bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G7/04
CPCY02P60/149Y02P60/14
Inventor 于文进阳燕娟龙明华
Owner GUANGXI UNIV