How to ventilate greenhouse vegetable cultivation?

How to ventilate greenhouse vegetable cultivation:

Ventilation is also a very stressful technique in the process of cucumber seedlings. Ventilation on the seedbed is mainly to adjust the environment of the seedbed, so that the cucumber seedlings can obtain proper temperature and humidity, and the carbon dioxide gas can be replenished in time through greenhouse ventilation.

Vegetable farmers carry out cucumber seedlings in their own plastic greenhouses. Unlike factory seedlings, the conditions for vegetable farmers are generally poor. Especially in controlling the temperature and humidity of seedbeds, all of them must be mastered by hand. If they are slightly lost, they will be abandoned. In the greenhouse, a small plastic arch shed is used for seedling cultivation. When the seedlings are in the morning, the ventilation is started when the temperature reaches 25 Â°C in the morning. When the temperature drops to 18 Â°C in the afternoon, the ventilation is stopped. The ventilation should be gradually carried out, and the ventilating port gradually increases with the increase of the temperature to avoid Ventilation is too fast and too strong. Plastic greenhouses usually have two seams or three seams. First open the upper seam to ventilate, and then gradually open the middle seam to ventilate, and finally put the bottom wind. When starting ventilation, it is necessary to ventilate a slit at intervals, and support the film with a wooden stick. The air outlet should be rotated every day. When the wind is relatively large, let the wind blow on the leeward side to prevent the cold wind from blowing directly onto the seedlings.

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Plane Ruled Grating

Plane ruled gratings are characterized by a superior efficiency at their design wavelength compared with holographic gratings. Plane Ruled gratings comprise the majority of diffraction gratings used in spectroscopic instrumentation and are especially useful in systems requiring high resolution.

China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300 x 300 mm for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.

Holographic gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%

1621839506(1)

Plane Ruled Grating,Plane Ruled Diffraction Grating,Plane Reflection Grating,Plane Ruled Reflective Grating

China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com