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Method for improving light utilization efficiency of leafy plants in plant factory by low dose far red light

A low-dose, red light technology, applied in botanical equipment and methods, horticultural methods, applications, etc., can solve problems such as less far-red light, and achieve the effect of increasing accumulation and improving light energy utilization efficiency

Pending Publication Date: 2019-07-05
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are few applications and researches on far-red light in plant factories

Method used

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  • Method for improving light utilization efficiency of leafy plants in plant factory by low dose far red light
  • Method for improving light utilization efficiency of leafy plants in plant factory by low dose far red light
  • Method for improving light utilization efficiency of leafy plants in plant factory by low dose far red light

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Experimental material: Tebos lettuce (Lactuca sativa L.cv. ‘Tiberius’)

[0032] Environmental conditions: temperature 21-23°C, humidity 60-70%, CO 2 Concentration is 450ppm, Hoagland nutrient solution culture (pH=5.8, EC=1.8dS m -1 ), the size of the used sponge block for seedling cultivation is 3 × 3 × 3cm, the size of the cultivation tank is 130 × 70cm, and the nutrient solution is automatically circulated. In order to avoid mutual influence between treatments, different treatments are separated by reflective film.

[0033] Experimental treatment:

[0034] Three treatments were set up in the experiment, such as figure 1 As shown, the control group (Control) is 6:00-22:00 time range for 200μmol m -2 the s -1 The red and blue light (red / blue ratio is 7 / 1) treatment, the photoperiod is 16 hours; the far-red light treatment (FR-Day) is 50 μmol m on the basis of the control group -2 the s -1 Far-red light with a total light intensity of 250 μmol m -2 the s -1 , th...

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Abstract

The invention relates to the field of plant factory cultivation, in particular to a method for improving the light utilization efficiency of leafy plants in a plant factory by a low dose far red light. Red and blue lights are used as a light source of a photoperiod during cultivation of the leafy plants in the plant factory, and the method adds the low dose far red light to the photoperiod. The method adds the low dose far red light, promotes the leafy pants to show the characteristics of shade plants of stem and petiole elongation, leaf angle elevation, leaf area increase and the like, helpsthe plants capture more light for photosynthesis, increases the accumulation of dry matter, and improves the light energy utilization efficiency of the leafy plants.

Description

technical field [0001] The invention relates to the field of plant factory cultivation, in particular to a method for improving light energy utilization efficiency of leaf vegetables in plant factories by using low-dose far-red light. Background technique [0002] The application time of LED artificial light source in agricultural production is short, because the power of plant photosynthesis electron transmission mainly comes from red (500-600nm) and blue (400-500nm) light bands, and the photosynthesis of plants in the red and blue light bands The quantum efficiency is the highest, so red and blue light have always been the focus of attention and use. Although the photosynthetic quantum efficiency of plants decreases under far-red light (720-750nm), far-red light as a signal light source plays an important role in the process of plant photomorphogenesis. At present, there are few applications and researches on far-red light in plant factories. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): A01G7/04
CPCA01G7/045Y02P60/14
Inventor 李涛邹洁杨其长张雅婷张玉琪
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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