JP2017135028A - Illumination system, and chicken breeding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination system for breeding chicken for meat such as broiler, which is capable of efficiently increasing the body weight of chickens.SOLUTION: An illumination system 10 which may be used for breeding chickens, includes: a light source unit 21 that emits light the emission peak wavelength of which is 480-580 nm; and a control unit 31 that controls the light source unit 21 to emit light to illuminate a breeding area of chickens in an early period of breeding of the chickens. The control unit 31 also controls the light source unit 21 to emit white light to chickens in a later breeding period. With this, a high effect for increasing weight of chickens is obtained.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lighting system used for poultry farming and a chicken breeding method.

  The breeding of chickens is an active industry in many countries around the world including Japan. For example, Patent Literature 1 discloses a breeding method in which lighting in a poultry house is brightened at the initial stage of growth and gradually darkened before shipment.

JP 2009-171866 A

  In raising chickens for meat such as broilers, it is required to increase the number of chickens efficiently.

  The present invention provides an illumination system that can efficiently increase chickens and a chicken breeding method.

  An illumination system according to an aspect of the present invention is an illumination system used for poultry farming, and a light source unit that emits light having an emission peak wavelength of 480 nm or more and 580 nm or less; A control unit that performs control to irradiate the chicken breeding area with the emitted light.

  In the chicken breeding method according to one embodiment of the present invention, the chicken breeding region is irradiated with light having an emission peak wavelength of 480 nm or more and 580 nm or less in the first half of the breeding period.

  According to the lighting system and the chicken breeding method of the present invention, chickens can be efficiently gained.

FIG. 1 is a diagram illustrating an outline of a lighting system according to an embodiment. FIG. 2 is a block diagram illustrating a functional configuration of the illumination system according to the embodiment. FIG. 3 is a diagram showing an emission spectrum of white light used in the experiment. FIG. 4 is a diagram showing an emission spectrum of green light used in the experiment. FIG. 5 is a diagram illustrating the illuminance of light during the experiment. FIG. 6 is a diagram illustrating a converted value of illuminance when considering the visibility characteristics of chickens. FIG. 7 is a diagram showing feed given to chickens in the experiment. FIG. 8 is a diagram showing a change in the body weight in the first cultivating period. FIG. 9 is a diagram showing a change in body weight in the later stage of breeding. FIG. 10 is a diagram showing an increase in body weight for each week during the breeding period. FIG. 11 is a flowchart of Operation Example 1 of the illumination system according to the embodiment. FIG. 12 is a flowchart of Operation Example 2 of the lighting system according to the embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, and the overlapping description may be abbreviate | omitted or simplified.

(Embodiment)
[Constitution]
First, the structure of the illumination system which concerns on embodiment is demonstrated. FIG. 1 is a diagram illustrating an outline of a lighting system according to an embodiment. FIG. 2 is a block diagram illustrating a functional configuration of the illumination system according to the embodiment.

  As FIG. 1 shows, the illumination system 10 which concerns on embodiment is the illumination system for chicken raising. The lighting system 10 is installed in the chicken house 60, for example. As illustrated in FIGS. 1 and 2, the lighting system 10 includes a lighting device 20 and a control device 30. Moreover, although it is not an essential component, the illumination system 10 includes an air conditioner 40 and a temperature measuring device 50. Hereinafter, each device will be described in detail.

[Lighting device]
First, the lighting device 20 will be described in detail. The lighting device 20 is installed on the ceiling of the chicken house 60 and illuminates the inside of the chicken house 60. At least one lighting device 20 may be installed on the ceiling of the chicken house 60, and a plurality of lighting devices 20 may be installed. Specifically, the illuminating device 20 irradiates light to the breeding area 70 (the floor of the chicken house 60) where a plurality of chickens are raised. Thereby, light is irradiated to the chicken in the chicken house 60.

  The breed of the chicken raised in the poultry house 60 is, for example, a broiler (more specifically, chunky, cobb, arbor acre, etc.), but other breeds such as so-called chickens may be used.

  The illumination device 20 includes a light source unit 21. Specifically, the light source unit 21 includes a white light source 21w, a red light source 21r, a green light source 21g, and a blue light source 21b. The light source unit 21 can emit white light, red light, green light, and blue light.

  The white light source 21w is a light source that emits white light, and is specifically an incandescent bulb or a fluorescent lamp. The white light source 21w may be a light source using LEDs. In this case, the white light source 21w may be a COB (Chip On Board) type light emitting module or an SMD (Surface Mount Device) type light emitting module. Further, the white light source 21w may be a remote phosphor type light emitting module. In addition, when the illuminating device 20 is provided with the red light source 21r, the green light source 21g, and the blue light source 21b, white light may be produced | generated by the light which these three light sources emit, In such a case, a light source part 21 does not need to have the white light source 21w.

  The white light emitted from the white light source 21w may be white on a black body locus or may be white off the black body locus. Further, the correlated color temperature of the white light emitted from the white light source 21w is not particularly limited.

  The red light source 21r is a light source that emits red light. For example, the red light source 21r emits red light having an emission peak wavelength of 600 nm or more and 680 nm or less. The red light source 21r is specifically a light emitting module using a red LED, but the specific mode of the red light source 21r is not particularly limited.

  The green light source 21g is a light source that emits green light. For example, the green light source 21g emits green light having an emission peak wavelength of 480 nm or more and 580 nm or less (specifically, including green-blue, blue-green, green, and yellow-green light). The green light source 21g is specifically a light emitting module using a green LED, but the specific mode of the green light source 21g is not particularly limited.

  The blue light source 21b is a light source that emits blue light. The blue light source 21b emits blue light (specifically, including blue and violet light) having an emission peak wavelength of 380 nm to 480 nm, for example. The blue light source 21b is specifically a light emitting module using a blue LED, but the specific mode of the blue light source 21b is not particularly limited.

[Control device]
Next, the control device 30 will be described. The control device 30 is a controller that controls one or more lighting devices 20. The control device 30 includes a control unit 31, a storage unit 32, and a timer unit 33.

  The control unit 31 controls the light source unit 21 of the lighting device 20. Specifically, the control unit 31 can independently control the white light source 21w, the red light source 21r, the green light source 21g, and the blue light source 21b. That is, the control unit 31 can selectively irradiate the breeding region 70 with white light, red light, green light, and blue light. The control of the control unit 31 includes turning on, turning off, and dimming.

  In addition, the control unit 31 controls the air conditioner 40 to be turned on / off and the air flow rate. For example, the control unit 31 controls the air conditioner 40 based on the temperature acquired from the temperature measurement device 50.

  Specifically, the control unit 31 includes a PWM control circuit (dimming circuit) for controlling the light output of the light source unit 21, a control circuit for controlling the air conditioner 40, and the like. The control unit 31 may be configured by a processor, a microcomputer, or the like.

  The storage unit 32 is a storage device that stores a control program executed by the control unit 31 when the control unit 31 includes a processor or a microcomputer. The storage unit 32 is realized by a semiconductor memory, for example.

  The time measuring unit 33 measures time. For example, the timer 33 measures the current date and time (including date). Specifically, the timer 33 is a timer circuit or a real-time clock IC, but may be in any form. Time information indicating the time measured by the time measuring unit 33 is output to the control unit 31, and the control unit 31 controls the light source unit 21 according to the time measured by the time measuring unit 33.

[Air conditioner and temperature measuring device]
The air conditioner 40 performs air conditioning in the poultry house 60. The air conditioner 40 is, for example, a large ventilation fan for livestock.

  The temperature measuring device 50 measures the temperature inside the poultry house 60. The temperature measuring device 50 includes a temperature measuring element such as a thermistor or a thermocouple, and measures the indoor temperature (room temperature) at predetermined intervals. Temperature information indicating the temperature measured by the temperature measuring device 50 is output to the control unit 31.

[Contents of experiment]
The inventors can promote chicken growth by irradiating the breeding region 70 with light having an emission peak wavelength of 480 nm or more and 580 nm or less during the first period of the breeding period of the chicken by performing the following experiment. I found.

  First, the growing period will be described. The breeding period of meat chickens such as broilers is generally set to 49 days. Among the 49 days of the growing period, the first three weeks (from 0 to 21) are the first half of the growing period, and the latter four weeks (from 22nd to 49th) are the second half of the growing period. The starting point (0 day) of the breeding period may be 2 days or 3 days after the birth of the chick. For example, the weight of the broiler at the start of the growing period is about 40 g, and the weight of the broiler at the end of the growing period is 3000 g or more.

  It should be noted that the boundary between the first and second growing periods does not need to be strictly determined as described above, and may belong to, for example, the 19th to 24th days of the growing period.

  Next, the details of the contents of the experiment will be described.

  In the experiment, the first condition in which only the white light source 21w (incandescent light bulb in the experiment) emits light, the second condition in which only the green light source 21g (green LED in the experiment) emits light, and the blue light source in the whole growing period It was performed under each condition of the third condition in which only 21b (in the experiment, blue LED) was caused to emit light. FIG. 3 is a diagram showing an emission spectrum of white light used in the experiment, and FIG. 4 is a diagram showing an emission spectrum of green light used in the experiment. The emission peak wavelength of the emission spectrum of green light shown in FIG. 4 is located around 555 nm. Although not shown, the emission peak wavelength of the emission spectrum of blue light used in the experiment is located near 450 nm.

  In addition, the illuminance in the breeding area 70 (floor surface of the poultry house 60) was changed between the first period of breeding (from the 0th day to the 21st day in the experiment) and the second half of the breeding period (from the 22nd day to the 49th day). . FIG. 5 is a diagram illustrating the illuminance of light during the experiment.

  As shown in FIG. 5, in the experiment, the illuminance is changed between the first growth period and the second growth period under any condition. Specifically, the illuminance at the later stage of the cultivation is set lower than the illuminance at the first stage of the cultivation. In addition, since FIG. 5 is the illumination intensity seen with the human eye, there seems to be a difference in illumination intensity under each condition. However, considering the visibility characteristics of chickens, the difference in illuminance between the conditions is small as shown in FIG. FIG. 6 is a diagram illustrating a converted value of illuminance when considering the visibility characteristics of chickens. In the experiment, the light source unit 21 is not turned off even in the entire growing period.

  Under each condition, a total of 600 chickens of 300 male chickens (specifically, broiler breed chunky breed) and 300 female chickens (also chunky breed) were reared. In addition, although the feed (food) given to the chicken was the same feed under any condition, it was changed between the first and second growing periods in the same manner as the illuminance. FIG. 7 is a diagram showing feed given to chickens in the experiment.

  As shown in FIG. 7, a medicinal feed containing animal protein was given in the first growth period. This feed has a CP (crude protein) of 21% and a ME (metabolic energy) of 3,050 kcal. In the late breeding period, a drug-free feed without animal protein was given. The CP of this feed is 18% and the ME is 3,200 kcal. The amount of feed given in each condition is the same.

[results of the experiment]
Next, the results of the above experiment will be described. FIG. 8 is a diagram showing a change in the body weight in the first cultivating period. FIG. 9 is a diagram showing a change in body weight in the later stage of breeding. FIG. 10 is a diagram showing an increase in body weight for each week during the breeding period.

  8 and 9 show the transition of the average value of the weight of 600 birds under each condition. Body weight measurements were taken at the end of each week. The graph of FIG. 9 is a graph showing the continuation of the graph of FIG. In FIG. 10, the average value of the increase in weight of 600 birds is shown by a bar graph, and the length of the straight line extending in the vertical direction superimposed on the bar graph indicates the variation in the weight of 600 chickens.

  First, the results of the experiment in the first growth period will be described with reference to FIGS. As shown in FIG. 8, in the entire growth period, the result that the body weight increasing effect under the second condition (green) was the largest was obtained. Next, the increase effect of the third condition (blue) was high, and the increase effect of the second condition (white) was the lowest.

  At the end of the first half of the breeding period, the weight of the chicken under the second condition (green) was about 8% to 10% heavier than the first condition (white) that resulted in the least weight gain effect. It was.

  On the other hand, as shown in FIG. 10, the amount of increase in body weight is the largest in the second condition (green) in any period of the first, second, and third weeks in the breeding period. . In the first week, the increase in the first condition (white) and the increase in the third condition (blue) are equivalent, but in the second week, the third condition is more than the first condition (white). (Blue) has a smaller increase. In the third week, the increase amount is larger in the third condition (blue) than in the first condition (white).

  In this way, in the early growth period, a high body weight gain effect can be obtained by irradiating the chicken with green light. Green light promotes the proliferation of chicken skeletal muscle satellite cells. Therefore, it is considered that green light is suitable for remarkably growing chickens in the early breeding period.

  Next, the results of the experiment in the later stage of growth will be described with reference to FIGS. As shown in FIG. 9, at the end of the later stage of breeding, the weight of the chicken became heavier in the order of the first condition (white), the second condition (green), and the third condition (blue).

  As shown in FIG. 10, the first condition (white), the second condition (green), and the third condition in any period of the fourth week, the fifth week, and the sixth week among the growing periods. The results showed that the increase in chicken weight increased in the order of (blue). On the 7th lap, unlike the 4th to 6th weeks, the result was that the weight of the chicken increased in the order of the third condition (blue), the second condition (green), and the first condition (white).

  Thus, in the latter stage of breeding, a high body weight gain effect is obtained by irradiating the chicken with white light.

  As shown in FIG. 10, in the later stage of breeding, there is a large variation in the amount of increase in body weight under the third condition (blue), and there are chickens whose body weight has increased remarkably due to the third condition (blue). Therefore, by adjusting the light irradiation conditions such as increasing the illuminance of light, a high body gain effect may be obtained under the third condition (blue). In addition, it is thought that blue light has an effect of increasing blood androgens, and thus there is a chicken whose body weight has significantly increased in the later stage of breeding.

[Operation example 1 of lighting system]
The operation of the lighting system 10 based on the results of the above experiment will be described. FIG. 11 is a flowchart of the operation example 1 of the lighting system 10.

  After the start of the growing period, the control unit 31 of the control device 30 selectively causes the green light source 21g included in the light source unit 21 of the lighting device 20 to emit light. That is, the control unit 31 performs control to irradiate the breeding region 70 with the green monochromatic light emitted from the green light source 21g in the first breeding period in the chicken breeding period (S11).

  In the above experiment, the emission peak wavelength of green monochromatic light was 555 nm, but the same effect can be obtained if the emission peak wavelength is 480 nm or more and 580 nm or less. That is, in step S11, the control unit 31 may irradiate the breeding region 70 with light (monochromatic light) having an emission peak wavelength of 480 nm or more and 580 nm or less.

  Subsequently, based on the time measured by the time measuring unit 33, the control unit 31 determines whether or not the first growing period has ended, that is, whether or not the first growing period has transitioned to the second growing period (S12). When it determines with the control part 31 not having completed the cultivation first term (it is No at S12), it continues irradiation of green light (S11). On the other hand, when it determines with the control part 31 having ended the cultivation first period (it is Yes at S12), the white light source 21w contained in the light source part 21 of the illuminating device 20 is selectively light-emitted. That is, the control part 31 performs control which irradiates the breeding area | region 70 with the white light which the white light source 21w emits instead of the green light irradiated in the breeding early stage at the late breeding period in the chicken breeding period (S13).

  In the experiment, an incandescent light bulb was used as the white light source 21w. However, in step S13, another white light source such as a white light source using an LED may be used as the white light source 21w. It has been experimentally confirmed that the same effect as that of the incandescent bulb can be obtained by such other white light source.

  Moreover, the control part 31 makes the illumination intensity of the light irradiated to the breeding area | region 70 in the last stage of breeding lower than the illumination intensity of the light irradiated to the breeding area 70 in the first stage of breeding, for example. Specifically, the illuminance in the green light breeding region 70 in the first growth period is about 10 lux, and the illuminance in the white light breeding region 70 in the second growth period is about 5 lux.

  However, in the case where a body gain effect can be obtained by increasing the illuminance in the later stage of breeding, the control unit 31 irradiates the breeding area 70 with the illuminance of light irradiated on the breeding area 70 in the later stage of breeding. It may be higher than the illuminance of the emitted light.

  Subsequently, the control unit 31 determines whether or not the rearing period has ended based on the time measured by the time measuring unit 33 (S14). If it is determined that the rearing period has not ended (No in S14), the control unit 31 continues the green light irradiation (S13). On the other hand, when the control unit 31 determines that the rearing period has ended (Yes in S14), the operation (the growing period) ends.

  Based on the above experimental results, chickens can be efficiently increased by the operation of the lighting system 10 as described above.

  In addition, although green light may be irradiated in the whole period of the growth period, it may be irradiated intermittently in the growth period. For example, a period during which the light is extinguished may be provided in the first growth period. Similarly, although white light may be irradiated in the whole period of the latter breeding period, it may be irradiated intermittently in the latter breeding period.

[Lighting system operation example 2]
In addition, as demonstrated in the said experiment, a remarkable body-gaining effect may be acquired by irradiating blue monochromatic light in the late stage of a growth. Therefore, blue light may be irradiated in the later stage of growth. Hereinafter, the operation of the illumination system 10 will be described. FIG. 12 is a flowchart of the operation example 2 of the lighting system 10.

  As illustrated in FIG. 12, in the operation example 2, when the control unit 31 determines that the first growth period has ended (Yes in S <b> 12), the control unit 31 selectively selects the blue light source 21 b included in the light source unit 21 of the lighting device 20. Make it emit light. In other words, the control unit 31 performs control to irradiate the breeding region 70 with blue monochromatic light emitted from the blue light source 21b in place of the green light irradiated in the first growing period in the later growing period in the chicken growing period (S15). ).

  At this time, the control unit 31 may lower or increase the illuminance of light applied to the breeding region 70 in the later stage of breeding than the illuminance of light applied to the breeding area 70 in the first stage of breeding. . Moreover, although blue light may be irradiated in the whole period of the latter breeding period, it may be irradiated intermittently in the latter breeding period. Note that the emission peak wavelength of blue monochromatic light may be not less than 380 nm and not more than 480 nm.

  According to the operation of the lighting system 10 as described above, a chicken with significantly increased body weight can be obtained.

  As a result of the above experiment, it is desirable to irradiate blue light in the seventh week of the growing period. Therefore, the control unit 31 may perform control to irradiate the breeding region 70 with the blue monochromatic light emitted from the blue light source 21b during the seventh week of the breeding period.

[Example 3 of operation of lighting system]
The period in which the red monochromatic light is irradiated may be included in the rearing stage. Specifically, the control unit 31 selectively causes the red light source 21r included in the light source unit 21 of the lighting device 20 to emit light in the later stage of growth. That is, the control unit 31 performs control to irradiate the breeding region 70 with the red monochromatic light emitted from the red light source 21r in the later breeding period of the chicken breeding period. The emission peak wavelength of red light is, for example, not less than 600 nm and not more than 680 nm.

  In the late breeding period, chickens may be injured due to a fight between chickens. If the breeding area 70 is irradiated with red light that is the same as the color of the chicken's blood, it makes one chicken think that another chicken has already been injured, so that the chicken can calm down and fight between the chickens is suppressed. can do.

  The lighting system 10 further includes an imaging unit that captures the breeding area 70, and the control unit 31 performs image processing on an image captured by the imaging unit, thereby specifying a period in which there is a fight between chickens. Good. And the control part 31 may change the light irradiated in the specified period into red light.

  Thereby, the illumination system 10 can irradiate red light efficiently in the period etc. where there are many fights between chickens.

[Effects]
As described above, the illumination system 10 is an illumination system used for poultry farming, and includes a light source unit 21 that emits light having an emission peak wavelength of 480 nm or more and 580 nm or less, and a light source unit 21 in the first breeding period in the chicken breeding period. The control part 31 which performs control which irradiates the light which radiates | emits to the chicken breeding area | region 70 is provided.

  Thereby, a chicken can be efficiently increased in the growing first stage.

  Further, the light source unit 21 may further emit white light, and the control unit 31 may perform control to irradiate the breeding region 70 with the white light emitted from the light source unit 21 in the late breeding period of the chicken breeding period.

  Thereby, a chicken can be efficiently increased in the late stage of breeding.

  Further, the light source unit 21 may further emit blue light, and the control unit 31 may perform control to irradiate the breeding region 70 with the blue light emitted by the light source unit 21 in the late breeding period of the chicken breeding period.

  Thereby, the chicken which increased significantly can be obtained.

  Further, the light source unit 21 may further emit red light, and the control unit 31 may perform control to irradiate the breeding region 70 with red light emitted from the light source unit 21 in the late breeding period of the chicken breeding period.

  Thereby, a chicken can be settled and a fight between chickens can be suppressed.

  Moreover, the control part 31 may make the illumination intensity of the light irradiated to the breeding area | region 70 in the latter breeding period lower than the illumination intensity of the light irradiated to the breeding area 70 in the first breeding period.

  Thereby, a chicken can be increased efficiently.

  In addition, in the chicken breeding method according to the above embodiment, the chicken breeding region 70 is irradiated with light having an emission peak wavelength of 480 nm or more and 580 nm or less in the first breeding period in the chicken breeding period.

  Thereby, a chicken can be efficiently increased in the growing first stage.

(Other embodiments)
As mentioned above, although the illumination system which concerns on embodiment, and the breeding method of a chicken were demonstrated, this invention is not limited to the said embodiment.

  For example, in the above-described embodiment, the monochromatic light of green (the emission peak wavelength is 480 nm or more and 580 nm or less) was irradiated to the breeding region in the first period of growth. However, even when white light or the like having an enhanced emission peak wavelength of 480 nm or more and 580 nm or less is irradiated, a body gain effect close to that when monochromatic light is irradiated may be obtained. The same applies to the case where blue monochromatic light is irradiated and the case where red monochromatic light is irradiated.

  Moreover, the structure of the light source part demonstrated by the said embodiment is an example. As the light source unit, a fluorescent tube, a metal halide lamp, a sodium lamp, a halogen lamp, a xenon lamp, a neon tube, or the like may be used. Moreover, inorganic electroluminescence, organic electroluminescence, chemiluminescence (chemiluminescence), a semiconductor laser, etc. may be used for a light source part. The light source unit may emit light of a desired color by a spectral filter or the like. The light source unit is not particularly limited as long as it can emit light of a desired color.

  Moreover, the lighting system according to the above embodiment may be used for culturing birds other than chickens such as ducks, turkeys, or guinea fowls.

  In addition, a comprehensive or specific aspect of the present invention may be realized by a system, a method, an integrated circuit, a computer program, or a recording medium such as a computer-readable CD-ROM. You may implement | achieve with arbitrary combinations of a program and a recording medium. For example, the present invention may be realized as a control method for a lighting device, may be realized as a program for causing a computer to execute the control method for a lighting device, or may be realized as a control device according to the above embodiment. May be.

  In the above-described embodiment, all or some of the components such as the control unit may be configured by dedicated hardware, or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

  In addition, the distribution of the components to the devices in the above embodiment is an example. For example, the lighting device and the control device may be realized as one device. Further, the lighting device may have a part of the function of the control device. Moreover, the memory | storage part with which a control part is provided may be implement | achieved as a memory | storage device provided outside the illumination system.

  In addition, it is realized by variously conceiving various modifications conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

DESCRIPTION OF SYMBOLS 10 Lighting system 20 Illuminating device 21 Light source part 31 Control part 70 Breeding area

Claims (6)

A lighting system used for poultry farming,
A light source unit that emits light having an emission peak wavelength of not less than 480 nm and not more than 580 nm;
An illumination system comprising: a control unit that performs control to irradiate the chicken breeding region with the light emitted by the light source unit in a first period of breeding in a chicken breeding period. The light source unit further emits white light,
The lighting system according to claim 1, wherein the control unit performs control to irradiate the breeding region with white light emitted from the light source unit in a later stage of the breeding period of the chicken. The light source unit further emits blue light,
The illumination system according to claim 1, wherein the control unit performs control to irradiate the breeding region with blue light emitted from the light source unit in a later stage of the breeding period of the chicken. The light source unit further emits red light,
The illumination system according to claim 1, wherein the control unit performs control to irradiate the breeding region with red light emitted from the light source unit in a later stage of the breeding period of the chicken. The control part makes the illumination intensity of the light irradiated to the breeding area in the latter breeding period lower than the illumination intensity of the light irradiated to the breeding area in the early breeding period. The lighting system described. A chicken breeding method in which light having an emission peak wavelength of 480 nm or more and 580 nm or less is irradiated to a chicken breeding region in the first breeding period of a chicken breeding period.

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