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Method for improving seedling and strong seedling production of plant factory by using low-dosage UVB

A low-dose, factory-based technology, applied in botany equipment and methods, gardening methods, gardening tools/equipment, etc., can solve the problems of UVB irradiation or supplementary light effect on seedling cultivation, unfavorable plant growth, and great harm to human body, etc., to achieve improved Effects of photosynthetic rate and photodamage defense ability, reduction of production cost, improvement of stress resistance ability of seedlings

Active Publication Date: 2022-03-08
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, people have been accustomed to think that UVB is an adversity stress factor, which is not conducive to plant growth and is more harmful to the human body.
[0005] At present, some studies also believe that UVB irradiation or supplementary light have beneficial effects on seedling cultivation

Method used

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  • Method for improving seedling and strong seedling production of plant factory by using low-dosage UVB
  • Method for improving seedling and strong seedling production of plant factory by using low-dosage UVB
  • Method for improving seedling and strong seedling production of plant factory by using low-dosage UVB

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 Experimental materials and grouping

[0039] Test material: cucumber seedlings (Cucumis sativus cv. Xiamei No. 2)

[0040] Environmental conditions: temperature 21-23℃, humidity 60-70%, CO2 concentration 400ppm, Hoagland nutrient solution cultivation (pH=5.8, EC=2.0 dSm -1 ), the seedlings are raised in a fully artificial light seedling factory. The cultivation frame is divided into upper and lower layers. The nutrient solution is watered every day, and each layer has a two-way fan for ventilation. To avoid mutual influence between treatments, different treatments were separated by reflectors.

[0041] Three treatments were set up in the experiment, the light environment parameter settings of each treatment are shown in Table 1, and the relative photon spectral distribution is shown in Table 1. figure 1 . Photoperiod processing such as figure 2 shown. The control group was without UVB treatment, and the experimental group 1 (UVB-photoperiod) added 5 μ...

Embodiment 2

[0046] Example 2 Effects of different treatment groups on seedling morphology

[0047] After the plants to be tested were dark-adapted in the dark room for 30 minutes, the target leaves were cut and immediately analyzed by the chlorophyll fluorescence imaging system (MAXI-PAM, Heinz Walz GmbH, Effeltrich, Germany) for the maximum photosynthetic quantum efficiency of photosystem II . (For detailed parameter setting, refer to Acclimating Cucumber Plants to BlueSupplemental Light Promotes Growth in Full Sunlight. Chenqiang kang et al. "Frontiers in Plant Science". 12: 782465)

[0048] Such as Figure 4 As shown, after 12 days of treatment, the crown width of cucumber seedlings in the control group was significantly larger than that of the two UVB treatment groups, and the leaf color was lighter than that of the UVB treatment group, showing obvious low-light leggy phenomenon; while the seedlings treated with UVB The shape is compact, the leaf color is dark green, and it has a ty...

Embodiment 3

[0050] Example 3 Changes in net photosynthetic rate of cucumber seedling leaves

[0051] Such as Figure 6 As shown, after 12 days of treatment, the net photosynthetic rate of cucumber seedling leaves of each treatment gradually increased with the increase of light intensity, and finally tended to saturation; among them, the cucumber seedlings treated with UVB irradiation in the dark period had the highest net photosynthetic rate, Especially under high light intensity conditions (>600μmol m -2 the s -1 ) was the most obvious, followed by UVB treatment in the photoperiod, and the leaves of the control group showed the lowest net photosynthetic rate.

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Abstract

The invention provides a method for improving cucumber seedling and strong seedling production in a plant factory by using low-dosage UVB. A conventional LED light source is adopted in the plant factory seedling cultivation process and mainly comprises red and blue light wave bands, and according to the method, low-dosage UVB radiation is added on the basis of a low-light-intensity full-spectrum Sunlike LED light source. Through low-dose UVB radiation, the stress symptom of the cucumber seedlings is not caused, but the cucumber seedlings are promoted to show the growth characteristics of sunny plants in a weak light environment, specifically, the plant type is more compact, the leaf net photosynthetic capacity and the water utilization efficiency are higher, and the capacity of coping with high-intensity dynamic light stress is higher; according to the method disclosed by the invention, the production quality of cucumber seedlings and strong seedlings in a plant factory can be greatly improved by adding a low dosage of UVB radiation.

Description

technical field [0001] The invention relates to a method for improving seedling cultivation and strong seedling production in a plant factory with low-dose UVB, and relates to the technical field of plant factories. Background technique [0002] Industrialized seedling breeding is a breeding method for mass production of seedlings under artificially created comfortable conditions. At present, the annual output of industrialized seedling cultivation in my country exceeds 60 billion plants. Therefore, industrial seedling cultivation has become an important part of the modern facility horticulture industry. However, seedlings usually lack adversity exercise in this seedling raising environment, resulting in poor adaptability after transplanting. Due to the poor stress resistance of the seedlings without stress training, it takes a long time to adapt to the new environment when they are transplanted in the open field or in simple facilities, and the normal growth of the plants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G7/04A01G22/05
CPCA01G7/045A01G22/05Y02P60/14
Inventor 李涛张玉琪程瑞锋李琨
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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